REPAIRING / SERVICING TV THOMSON T43D18SFS-01B

Technical description and composition of the THOMSON T43D18SFS-01B TV, panel type and modules used. The composition of the modules.

THOMSON LED
Model: T43D18SFS-01B

Chassis / Version: MT56T2

Panel: LVF430LGD0 E2 V52 A430LD4DUY-40

LED backlight: 3 strips of 8 led 3V

LED driver (backlight): integrated into PSU

PWM LED driver: MP3398A

MOSFET LED driver: PC015BD

Power Supply (PSU): SHG4301A-101H

PWM Power: OB5269CPAB MP1582

MOSFET Power: MDF10N60B

MainBoard: 40-MT56T2-MAF2HG

IC MainBoard: CPU, eMMC, DRAM, AUDIO, DC / DC

Tuner: ST55WM-2-E9

Specifications T43D18SFS-01B
THOMSON T43D18SFS-01B
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions

- The THOMSON T43D18SFS-01B TV does not turn on and does not show any signs of turning on, does not respond to the control buttons and the remote control.

In such cases, you should start looking for a fault in the SHG4301A-101H power supply circuits. It is necessary to measure its output voltages, and if they are absent (full or partial), the serviceability of the power switches (MDF10N60B) of the converters and rectifier diodes should be checked for a possible short circuit.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in an emergency mode in a short-circuit mode, and in case of a short circuit in the power elements of the primary circuit, the mains fuse is usually cut off.
Breakdown of Mos-Fet keys used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) OB5269CPA and MP1582 are usually checked by replacing them with new ones, or knowingly working properly.

- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and immediately disappears

As a rule, in such cases there is no display backlight. Usually the cause of the malfunction is in the breakage of the LEDs, or in the connectors of the LED strips 3 strips of 8 led 3V each, but sometimes the LED driver is also faulty.
To identify an open circuit in the LED lines without disassembling the panel, a current source is required. It is impossible to open the junctions connected in series with a simple multimeter; a voltage of several tens of volts is required.



If THOMSON T43D18SFS-01B has no image, but there is sound, often the display backlight LVF430LGD0 E2 V52 A430LD4DUY-40 simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.

Replacing the LEDs requires disassembling the LVF430LGD0 LCD panel - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels

If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV, light is visible through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But the main board MainBoard 40-MT56T2-MAF2HG often turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard 40-MT56T2-MAF2HG with an oscilloscope, as well as synchronizing signals to the loops with drivers.

Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.

- The indicator blinks or is on constantly, the TV does not turn on, does not respond to the remote control.

Repair or diagnostics of the 40-MT56T2-MAF2HG motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its CPU, eMMC, DRAM, AUDIO, DC / DC chips and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.

If there is no reception of TV channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the ST55WM-2-E9 tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.

Attention to TV owners! Attempts to repair THOMSON T43D18SFS-01B on your own are not recommended by the manufacturer and can lead to serious negative consequences! 

DOWNLOAD SHG4301A-101H DLBB449 Power supply diagram. ---->   SHG4301A-101H DLBB449 Power supply.
 

Current limitation. MP3398A. General recommendations:

To reduce the backlight current in LED drivers with an MP3398A controller, you should proportionally increase the total resistance of the resistors relative to the case at the ISET pin of the MP3398A controller. ISET (current setting) - pin 6 in SOIC-16 package (8 in SOIC-20 package).
The formula for the inverse proportion of the backlight current in milliamperes and the resistance Rset in kilo-ohms:
I [mA] = 988 / Rset [kOhm].

DOWNLOAD MP3398A  DIAGRAM  /  MANUAL   ------------------>   MP3398A.


The appearance of the MainBoard 40-MT56T2-MAF2HG is shown in the figure below:

40-MT56T2-MAF2HG

External view of the power supply

The main features of the THOMSON T43D18SFS-01B device:

Installed matrix (LED-panel) LVF430LGD0 E2 V52 A430LD4DUY-40.
A converter combined with a power supply is used to power the backlight LEDs and is controlled by the MP3398A PWM controller. The keys of the PC015BD type are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the THOMSON T43D18SFS-01B TV is carried out by the SHG4301A-101H power module, or its analogs using OB5269CPAb MP1582 microcircuits and MDF10N60B power switches.
MainBoard - the main board (motherboard) is a 40-MT56T2-MAF2HG module, using CPU, eMMC, DRAM, AUDIO, DC / DC chips and others.
The ST55WM-2-E9 tuner provides reception of television programs and tuning to channels.

LED TV THOMSON T43D18SFS-01B with LCD LVF430LGD0, measuring 43 "(109 cm) diagonally 16: 9. The declared brightness of the screen of 220 cd / m2 is provided by modern LED backlighting. The ratio of maximum brightness to minimum (contrast) is not less than 1200: 1. The LCD panel uses a direct backlighting with a rear-mounted LED - Direct LED.
The LVF430LGD0 matrix and MainBoard 40-MT56T2-MAF2HG software realize high quality HD images at a resolution of 1920x1080 pixels in 1080p (Full HD) graphics.
The T43D18SFS-01B TV is equipped with SMART software, built-in applications and the ability to work on the Internet. Internet connection can be made via Wi-Fi wireless connection. Supported media formats: MP3, MPEG4, JPEG.
Speaker power 16 W (2x8 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), SCART, HDMI x3, MHL, USB x2, Ethernet (RJ-45), Wi-Fi. A headphone jack is provided. The digital tuner is capable of receiving television channels in the DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2 standards.

The power supply unit is SHG4301A-101H.

Dimensions: with stand 977x624x221 mm, without stand 977x588x91 mm.

TV weight: 7.5 kg.

Attention! The LVF430LGD0 E2 V52 A430LD4DUY-40 panel of the THOMSON T43D18SFS-01B LED TV is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.

Once again, I remind THOSE IDIOTS users WANNABE IMPROVISED  INTERNET BULLSHIT FOOLS GUYS  and TV owners:

Self-repair attempts can have serious negative consequences, up to complete non-repairability.  

REPAIRING / SERVICING TV LG 42LY750H

 Technical description and composition of the LG 42LY750H TV, panel type and modules used. The composition of the modules.

LG LED
Model: 42LY750H

Chassis / Version: LD4FC

Panel: LC420DUH (FG) (A1)

LED driver (backlight): integrated into PSU

PWM LED driver: BD9486F

MOSFET LED driver: 4NF20, MDD3752

Power Supply (PSU): EAX65423701 (2.0) LGP3942-14PL1

PWM Power: MAP8800 (PFC), FA6A01N (PWM resonant), NR134S

MOSFET Power: TK7P60W, 60R360P

MainBoard: EAX65384003 (1.2) EBR78515108

IC MainBoard: CPU: LG1311, DRAM: H5TQ4G63AFR-PBC, EEPROM: AT24C256C, EMMC: THGBMAG6A2JBAIR

Tuner: TDJM-G101D

Specifications 42LY750H
LG 42LY750H
General recommendations for TV LCD LED repair
Possible manifestations of malfunctions

- LG 42LY750H does not turn on and does not show any signs of operation at all. Does not blink indicators and does not respond to control buttons.

In such cases, the power supply EAX65423701 usually fails. In the absence of the necessary supply voltages in the secondary circuits of the converters, it is necessary to check the power switches (TK7P60W, 60R360P) and rectifier diodes for possible partial or complete breakdown.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in an emergency mode in a short-circuit mode, and in case of a short circuit in the power elements of the primary circuit, the mains fuse is usually cut off.
Breakdown of power switches (MosFet) in switching sources is sometimes caused by malfunctions of other circuit elements, for example, in the circuits supplying the PWM controller, frequency setting or damper, as well as in the circuits of Negative Feedback (OOS) stabilization. PWM controllers (PWM) MAP8800 (PFC), FA6A01N (PWM resonant), NR134S, if they do not have visible damage to the case and an open short circuit between the pins, are usually checked by replacing.

- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and immediately disappears

A malfunction is usually in these cases most likely in the backlight units of the display matrix. Usually the cause of the malfunction is in the breakage of the LEDs, or in the connectors of the LED strips, but sometimes the LED driver is also faulty.
When diagnosing, it must be borne in mind that it is impossible to check for an open circuit in the LED strips circuit without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally a current source. By opening the panel, you can check each LED separately. Typically, Chinese multimeters will lightly light one 3-volt LED when the probes are connected to it in the forward direction. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off or pierced in the K / Z.

If the LG 42LY750H has no picture, but there is sound, the LCD backlight LC420DUH (FG) (A1) often simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.

Replacing the LEDs requires disassembling the LC420DUH LCD panel, a process that requires experience and qualifications from the technician. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels

If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV, light is visible through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But often the main board MainBoard EAX65384003 turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within the normal range, it is necessary to use an oscilloscope to trace the passage of LVDS signals from the MainBoard EAX65384003, as well as synchronization signals to the loops with drivers.

Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.

- The TV does not turn on, the indicator signals the standby or operating mode, or blinks.

Repair or diagnostics of the EAX65384003 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). In cases of complex MB (SSB) repairs and with the necessary skills and equipment, it may sometimes be necessary to replace its chips CPU: LG1311, DRAM: H5TQ4G63AFR-PBC, EEPROM: AT24C256C, EMMC: THGBMAG6A2JBAIR and other possible faulty components. Malfunctions associated with the use of BGA soldering technologies are usually easily diagnosed by the warm-up method.

The malfunction of the TDJM-G101D tuner is established after checking the software and all supply voltages at its terminals. The tuner data exchange with the processor via the I2C bus can be monitored with an oscilloscope.

I remind users again! Attempts to repair the LG 42LY750H TV without proper qualifications and the necessary experience can lead to its complete non-repairability!

DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------> CHASSIS : LD4FC   FOR MODELS:  42LY750H, 42LY750H-ZA, 42LW750H, 42LW750H-ZA.

The appearance of the MainBoard EAX65384003 is shown in the figure below:

EAX65384003

EAX65384003 can be used in TVs:

LG 47LB650V ZE (Panel LC470DUH (FG) (P2)), LG 42LB631V ZL (Panel LC420DUH (FG) (A1)), LG 39LB650V (Panel T390HVJ01.2), LG 55LB673V ZB (Panel LC550DUH (PG)(F1)), LG 47LB677V (Panel LC470DUH (FG)(F1)), LG 42LB673V (Panel LC420DUH (PG)(F1)), LG 47LB673V (Panel LC470DUH (PG)(F1)), LG 32LB652V 32LB652V-ZA.BRUWLDU (Panel LC320DUH (FG)(P2)), LG 50LB653V (Panel LC500DUH (FG)(P1)), LG 42LB652V 42LB652V-ZA.BRUWLJU (Panel LC420DUH (FG)(P2)), LG 55LB720V 55LB720V-ZG.BRUWLJU (Panel LC550DUH (PG)(F1)).


External view of the power supply

Main features of the LG 42LY750H device:

Installed matrix (LED panel) LC420DUH (FG) (A1).
A converter combined with a power supply is used to power the backlight LEDs, and is controlled by a BD9486F PWM controller. The keys of the 4NF20, MDD3752 types are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the LG 42LY750H TV is carried out by the EAX65423701 power module, or its analogs using MAP8800 (PFC), FA6A01N (PWM resonant), NR134S microcircuits and TK7P60W, 60R360P power switches.
MainBoard - the main board (motherboard) is an EAX65384003 module using CPU: LG1311, DRAM: H5TQ4G63AFR-PBC, EEPROM: AT24C256C, EMMC: THGBMAG6A2JBAIR and others.
Tuner TDJM-G101D provides reception of television programs and tuning to channels.

Additional technical information about the panel:
Brand: LG Display
Model: LC420DUH-FGA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 42 inch
Resolution: 1920x1080, FHD
Display Mode: IPS, Normally Black, Transmissive
Active Area: 927.94x521.96 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6/8 (Tr / Td)
Frequency: 120Hz
Lamp Type: WLED Without Driver
Signal Interface: EPI, 100 pins
Voltage: 12.0V

Technical specifications for this LG 42LY750H ------------------> LG 42LY750H TV with LCD display LC420DUH (FG) (A1), 42 "(107 cm) diagonal, 16: 9. 

The required screen brightness of 300 cd / m² is provided by LED backlighting. Contrast as the ratio of maximum brightness to minimum brightness , is 1200: 1. The display technology of this model is implemented with LED backlighting.
The LC420DUH sensor and MainBoard EAX65384003 software provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD).
The 42LY750H is equipped with SMART software, built-in applications and Internet connectivity. The connection to the network can be carried out via Wi-Fi wireless connection. The input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphic processing of a digital signal is performed in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. Supported media file formats: MP3, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), SCART, RGB, HDMI, USB x2, RS-232, Ethernet (RJ-45), Wi-Fi, WiDi, Miracast. A headphone jack is provided. A VGA (D-Sub 15) connector is provided to connect a computer or laptop to this TV model. This interface supports standard resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080. The digital tuner is capable of receiving TV channels in DVB-T, DVB-C standards.

The TV uses an EAX65423701 power supply.

Dimensions: With stand 849x561x236 mm, Without stand 849x512x79 mm.

TV weight: 9.5 kg.

Attention! The LC420DUH panel of the LG 42LY750H LED TV is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.
Once again, we remind users and TV owners.
Self-repair attempts can have serious negative consequences, up to complete non-repairability.

REPAIRING / SERVICING TV LG 50LB675V

Technical description and composition of the LG 50LB675V TV, panel type and modules used. The composition of the modules.

LG LED
Model: 50LB675V

Chassis / Version: LD42B

Panel: LC500DUH (PG) (F2)

LED driver (backlight): integrated into PSU

PWM LED driver: iW7025-00

Power Supply (PSU): EAX65424001 (2.4) LGP4750-14LPB

PWM Power: MAP8800 (PFC), CP1034DG, ICE3BR4765JZ

MOSFET Power: 13N60M2

MainBoard: EAX65384004 (1.4) EBT63301001

IC MainBoard: CPU: LG1311; DRAM: H5TQ4G63AFR-PBC; EEPROM: AT24C256C, EMMC: THGBMAG6A2JBAIR

Tuner: TDJM-G101D

Specifications 50LB675V
LG 50LB675V
General recommendations for TV LCD LED repair
Possible malfunctions

- The LG 50LB675V TV does not turn on, does not respond to the remote control and control panel buttons, the indicators do not light up or flash.

Usually with similar manifestations, the defect is caused by faulty elements in the main power supply module EAX65424001. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches (13N60M2) and rectifier diodes in the converters for a short circuit.
In case of any breakdowns in the secondary circuits, the converter can operate in an emergency mode of a short circuit, and with a short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key is often cut off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements, which can disable it in key mode, or provoke an excess of the maximum current or voltage values. These can be circuits supplying the PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) MAP8800 (PFC), CP1034DG, ICE3BR4765JZ, in the absence of external damage and short circuit between the terminals, are checked by replacing them with known good ones.

- No picture, sound, all other TV functions are working. When turned on, the image may sometimes appear for a second.

As a rule, in such cases there is no display backlight. The reason may be in the breakage of the backlight LEDs, in the stabilization of their power supply, or in the violation of the contact connections of the strings connectors.
When diagnosing, it must be borne in mind that it is impossible to check for an open circuit in the LED strips circuit without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally a current source. By opening the panel, you can check each LED separately. Typically, Chinese multimeters will lightly light one 3-volt LED when the probes are connected to it in the forward direction. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off or pierced in the K / Z.

If the LG 50LB675V does not have a picture, but there is sound, often the LCD backlight LC500DUH (PG) (F2) simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.

Replacing the LEDs requires disassembling the LC500DUH LCD panel - a process that requires experience and qualifications from the technician. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels

If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV, light is visible through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But often the main board MainBoard EAX65384004 turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard EAX65384004 with an oscilloscope, as well as synchronization signals to the loops with drivers.

Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.

- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.

Repair or diagnostics of the EAX65384004 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Complicated repair of MB (SSB) board is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the CPU elements: LG1311; DRAM: H5TQ4G63AFR-PBC; EEPROM: AT24C256C, EMMC: THGBMAG6A2JBAIR. BGA chip faults are usually easy to detect by warm-up.


Before replacing the TDJM-G101D tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus

Attention! Users and owners of 50LB675V TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting to repair themselves in order to avoid negative consequences that may lead to complete non-repairability of the device.

DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>  CHASSIS : LD42B   FOR MODELS:    50LB670V, 50LB671V, 50LB675V, 50LB677V.

Additional MainBoard Repair

The appearance of the MainBoard EAX65384004 is shown in the figure below:

EAX65384004

EAX65384004 can be used in TVs:

LG 32LB650V ZE (Panel LC320DUH (FG)(P2)), LG 47LB650V ZE (Panel LC470DUH (FG) (P2)), LG 42LB650V (Panel LC420DUH (FG)(P2)), LG 42LB671V ZF (Panel LC420DUH (PG) (F1)), LG 47LB671V (Panel LC470DUH (PG)(F1)), LG 42LB653V ZK (Panel LC420DUH (FG)(P1)), LG 42LB720V (Panel LC420DUH (PG)(F1)), LG 42LB658V (Panel LC420DUH (FG)(P2)), LG 47LB677V (Panel LC470DUH (FG)(F1)), LG 42LB679V (Panel LC420DUH (PG)(F1)), LG 47LB653V (Panel LC470DUH (FG)(P1)), LG 32LB653V (Panel LC320DUH( FG)(P1)), LG 42LB690V (Panel LC420DUH (PG)(F1)), LG 55LB630V (Panel LC550DUH).


External view of the power supply

Main features of the LG 50LB675V device:

Installed matrix (LED-panel) LC500DUH (PG) (F2).
A converter combined with a power supply is used to power the backlight LEDs and is controlled by the iW7025-00 PWM controller.
The formation of the necessary supply voltages for all nodes of the LG 50LB675V TV is carried out by the EAX65424001 power supply module, or its analogs using MAP8800 (PFC), CP1034DG, ICE3BR4765JZ microcircuits and 13N60M2 power switches.
MainBoard - the main board (motherboard) is an EAX65384004 module, using CPU chips: LG1311; DRAM: H5TQ4G63AFR-PBC; EEPROM: AT24C256C, EMMC: THGBMAG6A2JBAIR and others.
Tuner TDJM-G101D provides reception of television programs and tuning to channels.


Instructions and updates

There are files to download for the 49LB870V model from the manufacturer:

Files with updates and instructions:
File Description File Name Type Date Size
SW File (Version 05.05.70). Update instructions TV_Software_Update_Guide_v3.pdf PDF 18.07.2019 2014K
SW File (Version 05.05.70). Firmware (USB) Software_File (Version_05.05.70) .zip ZIP 18.07.2019 674112K

Compatible with:
 32LB650V-ZE, 32LB650V-ZN, 32LB652V-ZA, 32LB653V-ZK, 32LB656V-ZN, 39LB650V-ZE, 39LB650V-ZN, 42LB630V-ZA, 42LB631V-ZL, 42LB639V-ZU, 42LB650V-ZE, 42LB650V-ZN, 42LB652V-ZA, 42LB653V-ZK, 42LB656V-ZN, 42LB658V-ZE, 42LB670V-ZA, 42LB671V-ZB, 42LB671V-ZF, 42LB673V-ZB, 42LB674V-ZB, 42LB676V-ZA, 42LB677V-ZC, 42LB678V-ZF, 42LB679V-ZF, 42LB679V-ZH, 42LB680V-ZD, 42LB689V-ZF, 42LB690V-ZC, 42LB700V-ZG, 42LB720V-ZG, 42LB730V-ZD, 42LB731V-ZE, 47LB630V-ZA, 47LB631V-ZL, 47LB650V-ZE, 47LB650V-ZN, 47LB652V-ZA, 47LB653V-ZK, 47LB656V-ZN, 47LB670V-ZA, 47LB671V-ZB, 47LB671V-ZF, 47LB673V-ZB, 47LB674V-ZB, 47LB676V-ZA, 47LB677V-ZC, 47LB678V-ZF, 47LB679V-ZF, 47LB679V-ZH, 47LB680V-ZD, 47LB690V-ZC, 47LB700V-ZG, 47LB720V-ZG, 47LB730V-ZD, 47LB731V-ZE, 49JL9000-ZA, 49LB860V-ZB, 49LB870V-ZA, 50LB650V-ZE, 50LB650V-ZN, 50LB653V-ZK, 50LB670V-ZA, 50LB671V-ZB, 50LB674V-ZB, 50LB675V-ZA, 50LB676V-ZA, 50LB677V-ZC, 55JL9000-ZA, 55LB630V-ZA, 55LB631V-ZL, 55LB650V-ZN, 55LB652V-ZA, 55LB653V-ZK, 55LB656V-ZN, 55LB670V-ZA, 55LB671V-ZB, 55LB671V-ZF, 55LB673V-ZB, 55LB674V-ZB, 55LB675V-ZA, 55LB676V-ZA, 55LB678V-ZF, 55LB679V-ZF, 55LB680V-ZD, 55LB690V-ZC, 55LB700V-ZG, 55LB720V-ZG, 55LB730V-ZD, 55LB731V-ZE, 55LB860V-ZB, 55LB870V-ZA, 60JL9000-ZA, 60LB650V-ZN, 60LB680V-ZD, 60LB720V-ZG, 60LB730V-ZE, 60LB860V-ZB, 60LB870V-ZA, 65LB680V-ZD, 65LB730V-ZE, 70LB650V-ZA.
 
 
User Manuals and Instructions:
File type File name Language Date Size
User manual MFL68027016_05_RS.pdf English 01/20/2015 82,236K
Quick Start Guide WebOS_L_EU_13.zip English, Estonian, Latvian, Lettish, Lithuanian, Russian 03/10/2015 13,751K
Quick setup instructions MBM63817892_rev02_ENG.pdf English 09/11/2015 6,311K

Files can be downloaded from the manufacturer's website for the 49LB870V model.

 

 

TV LG 50LB675V with LCD display LC500DUH (PG) (F2), diagonal size 50 "(127 cm) 16: 9 format. The LCD-panel implements the principle of direct display backlighting with rear-mounted LEDs - Direct LED.
There is support for 3D images using passive polarization technology.
The LC500DUH sensor and MainBoard EAX65384004 software provide viewing of broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphics resolution at 1080p (Full HD).
TV model 50LB675V has built-in SMART software and webOS operating system installed. The connection to the network can be carried out via Wi-Fi wireless connection. The input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphic processing of a digital signal is performed in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
Sound system power of 24 W is provided by 3 speakers. The NICAM stereo audio processing system and the Sound Surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, audio x2, component, SCART, RGB, HDMI x3, MHL, USB x3, Ethernet (RJ-45), Wi-Fi 802.11 n, WiDi, Miracast. A headphone jack is provided. A VGA (D-Sub 15) connector is provided to connect a computer or laptop to this TV model. This interface supports standard resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080. The digital tuner is capable of receiving TV channels in the DVB-T, DVB-T2, DVB-C, DVB-S2 standards.

The TV uses an EAX65424001 power supply.

Dimensions: With stand 1116x705x247 mm, Without stand 1116x653x55 mm.

Attention! Panel LC500DUH LED-TV LG 50LB675V is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable. 

REPAIRING / SERVICING TV LG 22LN457U

 
Technical description and composition of the LG 22LN457U TV, panel type and modules used. The composition of the modules.

LG LED
Model: 22LN457U

Chassis / Version: LD31T

Panel: LC216EXN (SF) (A1)

LED backlight: 6916L-1237A 21.6 V13 EDGE REV0.1 2 6920L-0001C

T-CON: 6870S-1619B LC216EXN_SFA1_Source_Ver 0.7 H / F; TL2345ML, TPS65170

LED driver (backlight): integrated into T-CON

PWM LED driver: BD9472EFV SOP24

MOSFET LED driver: RSD050N10

Power Supply (PSU): Adapter 19V 2.1A

MainBoard: EAX65077504 (1.0)

IC MainBoard: CPU: LGE2121-MS, SPI Flash: MX25L8005, DRAM: H5TQ1G63EFR, Audio: TNP7513

Tuner: TDSQ-G601D (B)

Specifications 22LN457U
LG 22LN457U
General recommendations for TV LCD LED repair
Possible malfunctions

- The LG 22LN457U TV does not turn on, does not respond to the remote control and control panel buttons, does not light or blink indicators.

Most often, with similar manifestations, the main adapter power module turns out to be faulty.
The power source in this model is an external Adapter 19V 2.1A, usually the owners of TVs can purchase them on their own, and their repair may be impractical. But sometimes it is not difficult to open the unit and eliminate simple typical defects characteristic of most SMPS. It is necessary to measure its secondary output voltages, and if they are absent, check the power switches and rectifier diodes in the converters for a short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the power elements of the primary circuit, the mains fuse and / or the current sensor in the source of the key usually breaks off.
Mos-Fet power switches used in switching power supplies sometimes fail due to a malfunction of any other elements that can disable it in the key mode, or create an excess of the maximum permissible key parameters. These can be elements supplying a PWM regulator, frequency setting or damper circuits, or elements of negative feedback in the stabilization circuit. PWM controllers, in the absence of visible damage or outright short circuits between the terminals, are checked by replacing them with new ones, or knowingly working properly.

- There is no image, there is sound, it reacts to the remote control. Or, immediately after switching on for a second, the image may appear and immediately disappear.

In such cases, the most likely malfunction of the LED panel backlighting elements. Most often the reason for this is a break in the LEDs, or poor contact in the connectors of the brackets, less often the LED driver may be faulty.
When trying to detect a break in the LED lines, it should be borne in mind that it is difficult to do this without disassembling the panel. For example, a current source is required to open PN junctions connected in series.

If the LG 22LN457U has no picture, but there is sound, often the LCD backlight LC216EXN (SF) (A1) simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.

Replacing the LEDs requires disassembling the LC216EXN LCD panel, a process that requires experience and qualifications from the technician. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels

If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV, light is visible through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But the main board MainBoard EAX65077504 (1.0) often turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, it is necessary to trace the passage of LVDS signals from MainBoard EAX65077504 (1.0) with an oscilloscope, as well as synchronizing signals to loops with drivers.

Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.


- The indicator blinks or is on constantly, the TV does not turn on, does not respond to the remote control.

Repair or diagnostics of the EAX65077504 motherboard should begin with checking the stabilizers and power converters required to power the microcircuits and matrix. If necessary, you should update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - CPU: LGE2121-MS, SPI Flash: MX25L8005, DRAM: H5TQ1G63EFR, Audio: TNP7513 with new or known good ones. In cases where BGA technologies are used, defects are usually localized by heating.

If there is no reception of television channels, but the TV is working properly from external devices, first of all, you need to check the supply voltage of the TDSQ-G601D tuner (B) and update the software. I2C communication pulses must be monitored with an oscilloscope.

Remember! Attempts to self-repair the LG 22LN457U TV, in the absence of the necessary qualifications and experience, are categorically not recommended and are fraught with negative consequences, up to the complete non-repairability of the device!

DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>  Chassis: LC31A / LD31T   FOR MODELS:     22LN450U, 22LN457U Z*.

 

DOWNLOAD FIRMWARE FOR SPI FLASH  ----------->  22LN457U

Driver current limitation. BD9472EFV LC216EXN_SFA1. 

 

General recommendations

To reduce the backlight current in LED drivers with a BD9472EFV controller on the T-CON board, you can increase the total resistance of the resistors from pin 23 (ISET) of the BD9472EFV to the case. The exact proportional relationship may not be observed, the values ​​should be selected empirically.

BD9472EFV LED-Driver, T-CON 6870S-1619B LC216EXN_SFA1:

In LED drivers with a BD9472EFV chip on the T-CON bar, you can increase the total resistance of the resistors from pin 23 (ISET) of the BD9472EFV to the case. The exact proportional relationship may not be observed, the values should be selected empirically.
The drawing was compiled by hand visually from the T-CON bar, there was no documentation for the BD9472EFV on the Internet.
For the LC216EXN (SF) (A1) panel and 6916L-1237A backlight bar, the current was initially 70 mA in each of the two channels at maximum (a few seconds after switching on without a signal).
After increasing one of the resistors from 91 kOhm to 160 kOhm, the current decreased to 50 mA.
Diodes of standard size 7020, double, but the transitions are connected in parallel inside, therefore - three-volt.
There are 28 LEDs on the bar - two channels of 14 each.

 

Additional MainBoard Repair

The appearance of the MainBoard EAX65077504 is shown in the figure below:

EAX65077504

EAX65077504 can be used in TVs:

LG 24MN33V PZ (Panel V236BJ1-LE1 Rev.C2), LG 22LN450U 22LN457U (Panel LC216EXN (SF)(A1)), LG 22LN548M (Panel LC216EXN (SF)(A1)).

Main features of the LG 22LN457U device:

Installed matrix (LED panel) LC216EXN (SF) (A1).
Matrix control uses the 6870S-1619B Timing Controller (T-CON).
An integrated LED driver is used to power the backlight LEDs, controlled by the BD9472EFV SOP24 PWM controller. RSD050N10 keys are used as power elements of the LED driver.
An external adapter 19V 2.1A is used to power all the internal components of the LG 22LN457U TV.
MainBoard - the main board (motherboard) is an EAX65077504 module using CPU chips: LGE2121-MS, SPI Flash: MX25L8005, DRAM: H5TQ1G63EFR, Audio: TNP7513 and others.
Tuner TDSQ-G601D (B) provides reception of TV programs and tuning to channels.

Additional technical information about the panel:
Brand: LG Display
Model: LC216EXN-SFA1
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.6 inch
Resolution: 1366x768, WXGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 477.417x268.416 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Embedded (LED Driver)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V



Instructions and updates

There are files to download for model 22LN457U from the manufacturer:

Files with updates and instructions:
File Description File Name Type Date Size
SW File (Version 03.10.13). Firmware (USB) Software_File (Version_03.10.13) .zip ZIP 30.11.2016 62777K
SW File (Version 03.10.13). Update instruction TV_Software_Update_Guide_v3.pdf PDF 30.11.2016 1938K
Compatible with 22LN450U-ZB, 22LN457U-ZI, 26LN450B-ZB, 26LN450U-ZB, 26LN457B-ZI, 26LN457U-ZI, 28LN450U-ZB, 28LN457U-ZI, 29LN450B-Z50N-29LN445
Software Upgrade Guide. Upgrade instructions Software_Upgrade_Guide (CIS) .pdf PDF 08/20/2013 743K

User Manuals and Instructions:
File type File name Language Date Size
User manual MFL67707907_ (1404) _04REV.pdf English, Russian 08/14/2014 56,952K
Quick Start Guide NC4_L_E_L05_140306_ENG.pdf English 03/07/2014 8,750K

The files can be downloaded from the manufacturer's website for the 22LN457U model.



LG 22LN457U TV with LCD display LC216EXN (SF) (A1), 22 "(56 cm) diagonal, 16: 9 format. This model uses a panel with edge LED backlighting - Edge LED.
The LC216EXN sensor and MainBoard EAX65077504 (1.0) software provide high quality HD viewing at a resolution of 1366x768 pixels in 720p (HD Ready). The input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphic processing of a digital signal is performed in the 480i, 480p, 576i, 576p, 720p, 1080i, 1080p standards. Supported media file formats: MP3, MPEG4, Xvid, DivX, JPEG.
The power of the acoustic system of sound is 10 W (2x5 W), provided by two speakers. The NICAM stereo audio processing system and the Sound Surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, component, SCART, RGB, VGA, HDMI, MHL, USB. A headphone jack is provided. A VGA (D-Sub 15) connector is provided to connect a computer or laptop to this TV model. This interface supports standard resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768. The digital tuner is capable of receiving television channels in the DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2 standards.

The power consumed when operating from the mains is 30 W. External power supply Adapter 24V.

Dimensions: With stand 513x362x140 mm, Without stand 513x320x63 mm.

Attention! Panel LC216EXN LED-TV LG 22LN457U is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.

REPAIRING / SERVICING TV LG 60UH615V

Brand: LG, Model: 60UH615V-ZB.
Briefly from the TV: LCD, LED backlight, 59.5 ", 3840x2160, 4K UHD, HDR, TFT IPS, there is a satellite tuner, sound: 20W, HDMI connectors: 3, Internet access, Wi-Fi, Smart TV.

The composition uses MainBoard EAX66882503 EBT64319601 and LCD-panel LC600EGE-FJM3.
Power supply unit (PSU) EAX66923301 LGP65LIU-16CH2 Power Supply.

Main technical characteristics:
LCD TV LED Smart UHD Model Year: 2016
Diagonal screen size: 59.5 "(151 cm)
Screen format: 16: 9
Max Resolution: 3840x2160
Refresh rate: 50 Hz
Matrix: LC600EGE-FJM3
LED backlight: yes, Edge LED
Smart: yes. Wi-Fi support - yes
Operating system: webOS
HD support: 4K UHD, HDR
Viewing angle: 178 °
Progressive scan: yes
Digital tuner: DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2
Teletext: yes
Multimedia: MP3, WMA, MPEG4, HEVC (H.265), DivX, MKV, JPEG
Stereo sound: yes. NICAM STEREO
Sound power: 20W (2x10W)
Acoustics: two speakers
Headphone jack: yes
Interface: AV, component, HDMI x3, USB, RS-232, Ethernet (RJ-45), Wi-Fi 802.11n, WiDi, Miracast
TV weight: with stand: 23.7 kg
without stand: 23.3 kg
Dimensions with stand: 1348x839x263mm
Dimensions without stand: 1348x782x59 mm

If the LG 60UH615V has no picture, but there is sound, the LC600EGE-FJM3 display backlight often simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.

Replacing the LEDs requires disassembling the LC600EGE-FJM3 LCD panel - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels

If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV, light is visible through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But the main board MainBoard EAX66882503 often turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, the fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard EAX66882503 with an oscilloscope, as well as synchronization signals to the loops with drivers.

Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.

DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------> CHASSIS : UD65R     FOR MODELS:    60UH615*, 60UH615*-ZB, 60UH62**, 60UH62**-ZA, 60UH6157, 60UH615V, 60UH620V, 60UH6257, 60UH625V. 

The LED screen of the LG 60UH615V TV requires respect from users. The glass can crack even if it is lightly hit by a SAVAGE child's plastic toy.
Excessive pressure on the screen surface over any part of the area is equally dangerous.

Instructions and updates

There are files to download for the 60UH615V model from the manufacturer:

Files with updates and instructions:
File Description File Name Type Date Size
SW File (Version 05.31.00). Firmware (USB) Software_File (Version_05.31.00) .zip ZIP 10.08.2020 810611K
Compatible with 43UH603V-ZE, 43UH6107-ZB, 43UH6109-ZB, 43UH610V-ZB, 43UH619V-ZC, 43UH6207-ZA, 43UH620V-ZA, 49UH603V-ZE, 49UH6107-ZB6 49UH6, 49UH6107-ZB6 49UH6, 49UH6107-ZB6 49UH6 49UH6207-ZA, 49UH620V-ZA, 55UH605V-ZC, 55UH6157-ZB, 55UH6159-ZB, 55UH615V-ZB, 55UH620V-ZA, 55UH6257-ZA, 55UH625V-ZA, 60UH605V-ZA, 60UH605V-ZU15 ZA, 60UH6257-ZA, 60UH625V-ZA, 65UH6157-ZB, 65UH6159-ZB, 65UH615V-ZB, 65UH620V-ZA, 65UH6257-ZA, 65UH625V-ZA.
SW File (Version 05.31.00). Update instructions TV_Software_Update_Guide_v3.pdf PDF 10.08.2020 2014K
SW File (Version 05.30.50). Firmware (USB) Software_File (Version_05.30.50) .zip ZIP 01.02.2019 819656K

User Manuals and Instructions:
Document Language Date Size
User Guide - Operating Instructions English - English 07/01/2020 No data
User Guide - Operating Instructions English - English 07/01/2020 59 757K
Owner's Manual - User Manual English - English 06.22.2016 1494K

Files can be downloaded from the manufacturer's website for the 60UH615V model.

LG 60UH615V TV with LCD display LC600EGE-FJM3, diagonal 59.5 "(151 cm) in 16: 9 format. This model uses a panel with edge LED backlighting - Edge LED.
The LC600EGE-FJM3 sensor and MainBoard EAX66882503 software are capable of realizing the highest UHD quality image at 3840x2160 resolution in 4K UHD, HDR. Image processing is carried out using modern High Dynamic Range (HDR) technology with an extended range of brightness gradations.
TV model 60UH615V has built-in SMART software and webOS operating system installed. The connection to the network can be carried out via Wi-Fi wireless connection. Supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), DivX, MKV, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. The NICAM stereo audio processing system and the Sound Surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, component, HDMI x3, USB, RS-232, Ethernet (RJ-45), Wi-Fi 802.11n, WiDi, Miracast. A headphone jack is provided. The digital tuner is capable of receiving television channels in the DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2 standards.

The TV uses an EAX66923301 power supply.

Dimensions: with stand 1348x839x263 mm, without stand 1348x782x59 mm.

TV weight: with stand: 23.7 kg, without stand: 23.3 kg.

Attention! Panel LC600EGE-FJM3 LED TV LG 60UH615V is an expensive and unreliable element.
Do not allow any impact on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable. 

REPAIRING / SERVICING TV SAMSUNG UE40K6500

Technical description and composition of the SAMSUNG UE40K6500 TV, panel type and modules used. The composition of the modules.

SAMSUNG LED
Model: UE40K6500 UE40K6500AU

Chassis / Version: FA01

Panel: CY-VK040BGLV1V

T-CON: BN41-02481A LS400HN02 SK98BN950

LED driver (backlight): integrated into PSU

PWM LED driver: SLC7015R02

Power Supply (PSU): BN44-00871A L40E1_KDY

PWM Power: FA1A50N, FA6A21N

MOSFET Power: 60R580P

MainBoard: BN41-02534B BN94-10994T

IC MainBoard: CPU: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG

Tuner: BN40-00318A

Control: IR: BN41-02515A, WiFi: WCK720Q

UE40K6500AU Specifications
SAMSUNG UE40K6500
General recommendations for TV LCD LED repair
Possible manifestations of defects

- TV SAMSUNG UE40K6500 does not turn on and does not show any signs of operability at all. No response to the remote control and front panel control buttons.

With such manifestations, the power module BN44-00871A usually fails. It is necessary to make sure that its output voltages are present and, if they are completely absent, check the power switches (60R580P) and rectifier diodes for a possible short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in short-circuit mode, and in case of short-circuit in the elements of the primary circuit, the mains fuse is usually cut off.
Breakdown of Mos-Fet keys used in switching power supplies is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency setting or damper circuits, as well as in negative feedback stabilization. PWM microcircuits (PWM) FA1A50N, FA6A21N are usually checked by replacing them with new ones, or known to be working properly.

- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and disappears immediately

Usually, in such cases, a malfunction is detected in the LED panel backlight nodes. The reason can sometimes be in the power supply of the LEDs, but more often in their malfunction (breakdown or open circuit), sometimes in the violation of the contact connections of the LED strips.
When diagnosing, it must be borne in mind that it is impossible to check for an open in the circuit of the LED lines without disassembling the panels using a tester or multimeter. To open all PN junctions connected in series, a voltage of the order of several tens of volts is required, and ideally a current source. By opening the panel, you can check each LED separately. Typically, Chinese multimeters will lightly light one 3-volt LED if you connect the probes to it in the forward direction. For dual 6-volt LEDs, the PN junction of its emergency zener diode can serve as an indicator of the LED health. In the event of a malfunction of the LED, its zener diode will either be cut off, or broken through in the SC.

- The indicator on the front panel blinks, the TV does not turn on in operating mode, does not respond to the remote control.

Repair or diagnostics of the BN41-02534B motherboard should begin with checking the stabilizers and power converters necessary to power the microcircuits and matrix. If necessary, you should update or replace the software (software). Sometimes it is necessary to check or replace (if necessary) elements of the MainBoard - CPU: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG. In cases where a BGA processor is used, its malfunction is usually detected by the local warm-up method.

If the TV operates normally from external devices, but does not tune to TV channels, the BN40-00318A tuner may be faulty. In such cases, first of all, you should make sure that the supply voltage is present at its corresponding terminals. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the reason for the inoperability of the tuner may be a software failure.

If SAMSUNG UE40K6500AU has no picture, but there is sound, often the display backlight CY-VK040BGLV6V simply does not work. Moreover, in LED TVs, the LEDs inside the panel usually fail, less often the LED driver.
In such cases, you can see a barely noticeable image with a successful hit of external light on the screen.

Replacing the LEDs requires disassembling the LCD panel CY-VK040BGLV6V - a process that requires experience and qualifications from the master. We do not recommend doing such work on your own to the owners of TVs and craftsmen who do not have experience in repairing LCD panels

If there is no image, and the backlight is on, the screen becomes slightly lighter when turned on, and in an open TV, light is visible through the holes in the panel case.
In this case, the panel may also be faulty - damage to strips, loops, for example, as a result of moisture ingress after unsuccessful washing of the screen, the T-CON (Timing Controller) board may be faulty. But the main board MainBoard BN41-02534B often turns out to be faulty, a software failure is also possible.
Then, first of all, you need to check the panel supply voltage, fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within the normal range, it is necessary to trace the passage of LVDS signals from the MainBoard BN41-02534B with an oscilloscope, as well as synchronization signals to the loops with drivers.

Flooded or unsuccessfully washed screens of LED TVs can be restored, in about half of the cases, usually if significant damage has not formed in the loops and panel strips.

Users and owners of TVs should remember that attempts to self-repair a SAMSUNG UE40K6500 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences! Do not attempt self-repair without the relevant knowledge, experience and necessary qualifications!

Additional MainBoard Repair

The appearance of the MainBoard BN41-02534B is shown in the figure below:

BN41-02534B

BN41-02534B can be used in TVs:

SAMSUNG UE40K5500 (Panel CY-KK040BGLV1V), SAMSUNG UE32K5500 UE32K5500AW (Panel CY-KK032BGAV1V), SAMSUNG UE49K5500 UE49K5500BU (Panel CY-KK049BGLV1V).


External view of the power supply

Main features of SAMSUNG UE40K6500 device:

Installed matrix (LED-panel) CY-VK040BGLV1V.
Matrix control uses the BN41-02481A Timing Controller (T-CON).
To power the backlight LEDs, a converter combined with a power supply is used, controlled by the SLC7015R02 PWM controller.

The formation of the necessary supply voltages for all nodes of the SAMSUNG UE40K6500 TV is carried out by the BN44-00871A power module, or its analogs using FA1A50N, FA6A21N microcircuits and power switches of the 60R580P type.
MainBoard - the main board (motherboard) is a BN41-02534B module, using CPU chips: SDP1415, SPI Flash 25Q41, EEPPOM: 24C512, eMMC: THGBMBG and others.
Tuner BN40-00318A provides reception of television programs and tuning to channels.



Instructions and updates

There are files to download for the UE40K6500AUXTK  model from the manufacturer:

Latest firmware updates (latest firmwares):
File type File name Version Date Size
Update instruction 2016_TV_Firmware_Upgrade_Instruction_1.0_T-HKMFKDEUC.pdf 1.0 27.11.2018 0.35 Mb
Update file (USB) T-HKMFKDEUC.zip 1242.0 02/18/2020 991.11 Mb
Update file (USB) T-HKMFKDEUC_1242.0.exe 1242.0 02/18/2020 990.9 Mb
Update file (USB) T-HKMFKDEUC_1242.0_RU.exe 1242.0 18.02.2020 990.9 Mb

User Manuals and Instructions:
File type File name Version Date Size
User manual K6300_EN_BN68-07871H-00_2016.05.16.pdf 00 09.11.2016 20.99 Mb
Installation Guide K6300_CIS_QSG_BN68-07991R_01_160603.0.pdf 01 09.11.2016 3.58 Mb
Instruction PDF ENG-HMFDVBEUK-1.0.8.pdf 1.0.8 16.12.2016 21.56 Mb
Instruction PDF RUS-HMFDVBEUK-1.0.8.pdf 1.0.8 16.12.2016 21.71 Mb

Files can be downloaded from the manufacturer's website for the UE40K6500AUXTK  model.


SAMSUNG UE40K6500AU TV with LCD CY-VK040BGLV6V, diagonal size 40 "(102 cm) 16: 9 format. The display technology of this model is implemented with LED backlighting.
The CY-VK040BGLV6V matrix and the software of the MainBoard BN41-02534B provide viewing of broadcasts and films in high quality HD at a resolution of 1920x1080 pixels in graphics decomposition at 1080p (Full HD).
The UE40K6500AU TV is equipped with SMART software, built-in applications and the ability to work on the Internet. The connection to the network can be carried out via Wi-Fi wireless connection. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
Speaker power 20 W (2x10 W) is provided by two speakers. The NICAM stereo audio processing system and the Sound Surround function are used.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, component, HDMI x3, USB x2, Ethernet (RJ-45), Bluetooth, Wi-Fi. The digital tuner is capable of receiving television channels in the DVB-T, DVB-T2, DVB-C, DVB-S2 standards.

The power consumed when operating from the network is 95 W. BN44-00871A power supply.

Dimensions: with stand 916x607x251 mm, without stand 916x541x89 mm.

TV weight: with stand: 10.1 kg, without stand: 9 kg.

Attention! Panel CY-VK040BGLV6V of LED TV SAMSUNG UE40K6500AU is an expensive and unreliable element.
Avoid any impacts on the glass and pressure on the screen surface to avoid damage to the LED panel!
It is also unsafe for liquid to spill onto the screen. Sometimes one drop is enough if it drips down the glass onto the cables to make the TV unrepairable.

REPAIRING / SERVICING TV SAMSUNG UE43J5202

Technical description and composition of SAMSUNG UE43J5202 TV, type of panel and modules used. Module composition.

SAMSUNG LED
Model: UE43J5202 UE43J5202AU

Chassis/Version: BZ01

Panel: BOEI430WU1

LED backlight: GC43D08-ZC22AG-15 303GC430043

T-CON: HV430FHB-N1A 47-6021139 HV430FHBN1A

LED driver (backlight): integrated into PSU

PWM LED driver: SLC7015R

MOSFET LED driver: TO-252

Power Supply (PSU): BN44-00852A L48MSF_FDY

PWM Power: FA6A20N

MOSFET Power: TO-220, TO252

MainBoard: BN41-02482A BN94-12496G

MainBoard IC: CPU, eMMC, SPI Flash, DRAM, AUDIO, DC/DC

MainBoard: BN40-00318A DNTS243H5A

Control: Wi-Fi: WDF710Q BN59-01196C, IR: J5000_5200 BN41-02477A A38694D

Specifications UE43J5202AU
SAMSUNG UE43J5202
General recommendations for LCD LED TV repair
Possible defects

- SAMSUNG UE43J5202 does not turn on and does not show any signs of performance at all. Does not blink on the indicators and does not respond to the control buttons.

Often in such cases the power module BN44-00852A is defective. Then we recommend to measure its output voltages and in case of their absence you should check the functionality of the power switches (TO-220, TO252) and the inverter rectifier diodes for probable short circuit.
If the semiconductors in the secondary circuits breakdown, the inverter can usually be short-circuited, and the mains fuse is often blown when the power elements in the primary circuit are shorted.
Breakdown of power switches (MosFet) in pulsed sources, sometimes caused by faults in other circuit elements, such as PWM controller supply, frequency-retaining or damping circuits, as well as in negative feedback stabilization circuits (NFSR). PWM regulators FA6A20N, if they do not have visible housing damage and outright short circuits between pins, are usually checked by replacement.

- No picture, but sound is present, remote control responds. Or the image appears at power on and immediately disappears.

Failure in most of these cases is detected in the nodes and elements of LED panel backlight. The cause may be in the breakage of the backlight LEDs, in their power supply stabilization, or in the violation of the contact connections of the GC43D08-ZC22AG-15 303GC430043 string connectors.
When trying to detect breaks in the LED strings, you should keep in mind that it is difficult to do without disassembling the panel. For example a current source is needed to open the PN junctions connected in series.

- The TV doesn't turn on, the remote control doesn't respond. Indicator blinks or signals standby mode.

Repair or diagnostic of the motherboard BN41-02482A should begin with checking the stabilizers and power converters necessary to power the chips and matrix. If necessary, software (software) should be updated or replaced. If there is no possibility to replace the MB board (SSB), it is necessary to check the functionality of its components - CPU, eMMC, SPI Flash, DRAM, AUDIO, DC/DC. Defective components should be replaced.

The BN40-00318A DNTS243H5A tuner is faulty after checking the software and all the supply voltages at the terminals. The data exchange between the tuner and the processor via I2C can be checked with an oscilloscope.

Users and owners of TVs need to remember that trying to repair the SAMSUNG UE43J5202 TV without the appropriate qualification and the necessary experience, can lead to serious negative consequences!

More on MainBoard repair

The exterior of the MainBoard BN41-02482A is shown in the figure below:

N41-02482A

MainBoard Appearance

The main features of the SAMSUNG UE43J5202:

A matrix (LED panel) BOEI430WU1 is installed.
Timing Controller (T-CON) HV430FHB-N1A is used to control the matrix.
A converter combined with a power supply is used to power the backlight LEDs and is controlled by the SLC7015R PWM controller. As the power elements of LED-driver are used switches of TO-252 type.
The power supply module BN44-00852A or its analogues with the use of FA6A20N chips and TO-220, TO-252 power switches form the necessary supply voltages for all the nodes of SAMSUNG UE43J5202 TV.


Instructions and updates

There are downloadable files for un43j5200ahxpa model from the manufacturer:

User Manuals and Instructions (User Manuals):
File Type File Name Version Date Size
ENG-NMDVBEU-1.110 user manual 1.110 11.11.2015 4.57 Mb

You can download the files from the manufacturer's website for the model un43j5200ahxpa.

 
MainBoard - the main board (motherboard) is a module BN41-02482A, using CPU, eMMC, SPI Flash, DRAM, AUDIO, DC/DC and other chips.
The BN40-00318A DNTS243H5A tuner provides TV program reception and channel tuning.


SAMSUNG UE43J5202AU TV with BOEI430WU1 LCD display, measuring 42.5" (108 cm) diagonally in 16:9 aspect ratio. The 1000000:1 dynamic contrast ratio is achieved by special control of the LEDs depending on the brightness of the scene. This model uses a panel with an end arrangement of LEDs in the display backlight - Edge LED.
Matrix BOEI430WU1 and MainBoard software BN41-02482A provide for viewing shows and movies in high quality HD at a resolution of 1920x1080 pixels in 1080p (Full HD).
The model of TV UE43J5202AU has built-in software (software) SMART and installed the operating system Tizen. Connection to the network can be made via Wi-Fi wireless connection. Supported media file formats: MP3, WMA, MPEG4, DivX, MKV, JPEG.
The speaker system has a sound power of 20 W (2x10 W) provided by the two speakers. It uses NICAM stereo sound processing and Sound Surround surround function.
Communication with other devices via an external interface is supported by standard input and output connectors: antenna input (RF), AV, component, HDMI x2, USB, Ethernet (RJ-45), Wi-Fi 802.11n, WiDi, Miracast. The digital tuner is capable of receiving DVB-T, DVB-T2, DVB-C TV channels.

The power consumed by the worker in mains mode is 84 W. The power supply BN44-00852A.

Overall dimensions: with stand 986x632x288 mm, without stand 986x575x72 mm.

TV weight: with stand: 8.5 kg, without stand: 7.5 kg.

Warning. The BOEI430WU1 panel of the SAMSUNG UE43J5202AU LED TV is an expensive and unreliable part of it.
Do not allow any impact on the glass and pressure on the surface of the screen to avoid damage to the LED-panel!
It is also not safe to get liquid on the screen. Sometimes one drop is enough if it drips down the glass onto the cables and the TV becomes unrepairable.

REPAIRING / SERVICING TV SAMSUNG UE40NU7100U

Technical description and composition of the SAMSUNG UE40NU7100U TV, type of panel and modules used. Module composition.

SAMSUNG LED
Model: UE40NU7100U

Chassis/Version: FA01

Panel: CY-NN040HGLV2V

LED backlight: LM41-00550A, BN61-15481X

LED driver (backlight): integrated into PSU

PWM LED driver: BD94062F

MOSFET LED driver: TO-252

Power Supply (PSU): BN44-00947A L40E6_NDY

PWM Power: PFC, PWM

MOSFET Power: N-FET TO-220F

MainBoard: BN41-02635B BN94-13264E

IC MainBoard: CPU, eMMC: KLM4G1FEPD, SPI 25Q40, EEPROM: 24C512, DRAM, AUDIO: TAS5749M

Tag: BN40-00331A

Specifications UE40NU7100U
SAMSUNG UE40NU7100U
General recommendations for LCD LED TV repair
Possible defects

- SAMSUNG UE40NU7100U does not turn on, the indicators on the front panel are not lit or blinking. TV does not respond to the control buttons and remote control.

In such cases the problem should be looked for in the circuits of the power supply BN44-00947A. It is necessary to measure the output voltages in its secondary circuits, and in case of their complete absence check the serviceability of the power switches (N-FET TO-220F) and the rectifier diodes for possible breakdown (short circuit).
At breakdown of semiconductors in the secondary circuits of any converter, as a rule, it can operate in the short-circuit emergency mode without output voltages, and at short circuit in the elements of the primary circuit most often the line fuse and more rarely the current sensor at the source of the switch break down at once.
Mos-Fet switches used in switched-mode power supplies usually fail due to the failure of other elements, which can take it out of key mode, or cause it to exceed the maximum current or voltage. These may be the circuits feeding the PWM controller, the damping or frequency-retaining circuits, or the negative feedback elements in the stabilization circuit. PWM controllers (PFC) PFC, PWM, if there is no external damage and short circuit between the pins, are checked by replacing with known good ones.

- No picture, the screen is black, there is sound, with the external screen light you can sometimes see faintly visible outlines of the image.

Often in such cases there is no backlight of LED panel. Often the reason is a failure of LEDs (breakage, short circuit...), or connectors of LM41-00550A, BN61-15481X, less often faulty is the LED-driver.
To detect breakage in the LED strips without disassembling the panel you will need a power source. Open transitions connected in series can not be done with a simple multimeter, you need a voltage of several tens of volts.

- Indicator is blinking or glowing all the time, TV set doesn't turn on, remote control doesn't respond.

Repair or diagnosis of the motherboard BN41-02635B should begin with checking the stabilizers and power converters needed to power the chips and matrix. If necessary, the software (software) should be updated or replaced. When repairing the MB board, you must check its components CPU, eMMC: KLM4G1FEPD, SPI 25Q40, EEPROM: 24C512, DRAM, AUDIO: TAS5749M. Defective elements should be replaced. If the chips with BGA soldering technology are used, the problem in its implementation is detected by the method of local heating of the chip.

If you suspect the BN40-00331A tuner malfunction, first of all make sure that the software is correct, as well as that the required supply voltages and pulses of data exchange with the CPU via the I2C bus are present at the respective pins of the tuner.

It is necessary to remember! Attempts to repair TV SAMSUNG UE40NU7100U by yourself, in the absence of the necessary skills and experience, is strongly not recommended and is fraught with negative consequences, up to the complete unrepairable device!

More on MainBoard Repair

The exterior of the MainBoard BN41-02635B is shown in the illustration below:

BN41-02635B

MainBoard Appearance

The main features of the SAMSUNG UE40NU7100U:

A matrix (LED panel) CY-NN040HGLV2V is installed.
To power the LED backlight the converter is used, combined with the power supply, controlled by the PWM controller BD94062F. As the power elements of LED-driver are used switches of TO-252 type.
The power supply module BN44-00947A or its analogues with the use of PFC, PWM chips and N-FET TO-220F type power keys form the necessary supply voltages for all the SAMSUNG UE40NU7100U TV assemblies.


MainBoard - the main board (motherboard) is a module BN41-02635B, using CPU chips, eMMC: KLM4G1FEPD, SPI 25Q40, EEPROM: 24C512, DRAM, AUDIO: TAS5749M and others.
The BN40-00331A tuner provides TV program reception and channel tuning.


Instructions and updates

There are download files for UN40NU7100FXZC from the manufacturer:

Latest software updates, firmwares (latest firmwares):
File type File name Version Date Size
Update instructions 2018_TV_Firmware_Upgrade_Instruction_T-KTM2LDEUC.pdf 1.0 23.06.2020 0.5 Mb
Update file (USB) T-KTM2LDEUC.zip 1310.4 02.11.2020 1117.74 Mb
Update file (USB) T-KTM2LDEUC_1310.4.exe 1310.4 02.11.2020 1117.49 Mb

Instruction manuals and User Manuals:
File Type File Name Version Date Size
User manual BN68-08987G-02_UNU7100X_RU_L02_180710.1.pdf 02 13.07.2018 1.22 Mb
BN68-08995L-01_QSG_UNU7100X_CIS_180314.0.pdf 01 23.05.2018 0.3 Mb
Instruction PDF ENG_KM2DVBEUN-3.0.2_181205.0.0.pdf 3.0.2 02.01.2019 11.33 Mb

You can download the files from the manufacturer's website for the model UN40NU7100FXZC


SAMSUNG UE40NU7100U LCD TV CY-NN040HGLV2V, 40" (102 cm) diagonal in 16:9 aspect ratio. This model uses a panel with an end arrangement of LEDs in the backlighting of the display - Edge LED.
Matrix CY-NN040HGLV2V and MainBoard software BN41-02635B able to realize the image in the highest quality UHD at 3840x2160 pixels in 4K UHD, HDR. Image processing is made by modern technology High Dynamic Range (HDR) with an extended range of brightness gradation.
The UE40NU7100U has built-in SMART software and Tizen Operating System. Connection to the network can be made via Wi-Fi wireless connection. Supported formats of multimedia files: MP3, WMA, MPEG4, HEVC (H.265), DivX, MKV, JPEG.
The sound speaker system has a capacity of 20 W (2x10 W) and is equipped with two loudspeakers. NICAM stereo sound processing system and Sound Surround surround function are used.
Communication with other devices via an external interface is supported by standard inputs and outputs: antenna input (RF), AV, component, HDMI x3, USB x2, Ethernet (RJ-45), Wi-Fi 802.11ac, Miracast. The digital tuner is capable of receiving DVB-T, DVB-T2, DVB-C, DVB-S, DVB-S2 TV channels.

The power consumption in mains mode is 105 W. Power supply BN44-00947A.

Overall dimensions: with stand 914x604x210 mm, without stand 914x532x59 mm.

TV weight: with stand: 8.8 kg, without stand: 8.6 kg.

Warning. The panel CY-NN040HGLV2V of the SAMSUNG UE40NU7100U LED TV is an expensive and unreliable part of it.
Do not allow any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
Also it is not safe to get liquid on the screen. Sometimes one drop is enough if it drips down the glass onto the cables and the TV becomes unrepairable.

REPAIRING / SERVICING TV SAMSUNG UE40JU6610U

Technical description and composition of SAMSUNG UE40JU6610U TV, type of panel and modules used. Module composition.

SAMSUNG LED
Model: UE40JU6610U

Chassis/Version: HAWK_M_UHD_6k_RETIMER

Panel: CY-WJ040HGLV2V

LED backlight: V5DU-400DCA-R1, V5DU-400DCB-R1

T-CON: BN41-02297A BN95-01940B LSF400FN02-K

LED driver (backlight): integrated into PSU

PWM LED driver: SM1251

MOSFET LED driver: N-FET TO-220F

Power Supply (PSU): BN44-00806A L40S6_FDY

PWM Power: FA6A20N, SPC7011F

MOSFET Power: K8A50D

MainBoard: BN41-02344D BN94-10158V

IC MainBoard: CPU: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, DDR: K4B2G1646Q-BCMA

Specifications: BN40-00318B

Specifications UE40JU6610U
SAMSUNG UE40JU6610U
General recommendations for LCD LED TV repair
Possible trouble spots

- SAMSUNG UE40JU6610U does not turn on and does not give any signs of performance. It doesn't blink and doesn't respond to the control buttons.

In some of such cases the main switching power supply - the BN44-00806A module - becomes defective. Then its output voltages should be measured and if they are not, the power switches (K8A50D) and the rectifier diodes of converters should be checked for possible short circuits.
If the semiconductors in the secondary circuits breakdown, the inverter can usually be short-circuited, and the mains fuse is often blown when the power elements in the primary circuit are shorted.
Mos-Fet power switches used in switching power supplies sometimes fail due to the failure of some other element that can take it out of key mode, or create the maximum allowable parameters of the switch. These can be elements that feed the PWM controller, the frequency-retaining or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers FA6A20N, SPC7011F, if there is no visible damage or obvious short circuit between the pins are checked by replacing with the new ones or known good ones.

If the SAMSUNG UE40JU6610U has no picture, but there is sound, often the display backlight simply does not work. Moreover, in LED TVs usually fail LEDs inside the panel, less often the LED-driver.
In such cases, you can see a barely noticeable image when external lighting hits the screen.

To replace the LEDs requires disassembly of the LCD-panel - a process that requires a master of experience and expertise. Do not perform such work by yourself to owners of TV sets and masters who have no experience in LCD panel repair

If there is no image, but backlighting is working, the screen becomes a little lighter when the TV is turned on, and in the open TV you can see the light through the holes in the body of the panel.
In this case the panel may be defective - damage to the strips, cables, for example, as a consequence of moisture after an unsuccessful washing of the screen, the T-CON board (Timing Controller) may be defective. But quite often the MainBoard is defective as well, and software failure is also possible.
Then first it is necessary to check the panel power supply voltage, fuses on the T-CON board, as well as the supply and reference voltages of the column and line drivers - VGH, VGL, Vcom.
If these measurements are within normal limits, it is necessary to trace by oscilloscope the LVDS signals from MainBoard, as well as synchronizing signals to the driver stubs.

Filled or unsuccessfully washed LED TV screens can be restored in about half of the cases, usually, if there is no significant damage in the cables and panel bars.


- No image, the screen is black, there is sound, in the external screen light you can sometimes see faintly visible outlines of the image.

Usually in such cases malfunction is detected in the nodes of LED panel backlight. Usually the cause of the malfunction is in the breakage of the LEDs or in the connectors of the LED panels V5DU-400DCA-R1, V5DU-400DCB-R1, but sometimes the LED-driver is also faulty.
To check the LED strips for breakage without disassembling the panel will help, for example, a current source. It is not possible to open the series-connected PN-junctions with a simple multimeter, you will need a voltage of about several tens of volts.

READ HOW TO REPAIR THE TV LED BACKLIGHT --------------> HERE.

- The TV does not turn on, the LED indicates standby or working mode, or blinks.

Repair or diagnosis of the motherboard BN41-02344D should begin with checking the stabilizers and power converters needed to power the chips and matrix. If necessary, software (software) should be updated or replaced. In some cases to repair the MB board (SSB) you may need to replace the chips - CPU: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, DDR: K4B2G1646Q-BCMA with new or known good ones. In cases of BGA technology, defects are usually located by heating.

Before replacing the BN40-00318B tuner, if you cannot tune to the TV channels, make sure that the supply voltages are available and measure them at the respective pins of the tuner and check the software for correctness. The tuner-to-processor communication pulses can be checked with an oscilloscope

Warning to the users! Unauthorized repair of SAMSUNG UE40JU6610U TV without the appropriate qualification and experience can lead to its complete unrepairability  (IDIOTS ARE ADVISED !

More on MainBoard Repair

The exterior of the MainBoard BN41-02344D is shown in the figure below:

BN41-02344D

MainBoard Appearance

The main features of the SAMSUNG UE40JU6610U:

A matrix (LED panel) CY-WJ040HGLV2V is installed.
The matrix is controlled by the Timing Controller (T-CON) BN41-02297A.
The converter combined with the power supply is used to power the LED backlight and is controlled by the PWM controller SM1251. N-FET TO-220F type switches are used as power elements of LED-driver.
The power supply module BN44-00806A or its analogues with the use of FA6A20N, SPC7011F chips and K8A50D type power keys provide the formation of the required supply voltages for all the SAMSUNG UE40JU6610U TV assemblies.


MainBoard - the main board (motherboard) is a module BN41-02344D, using CPU: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, DDR: K4B2G1646Q-BCMA and others.
The BN40-00318B tuner provides TV program reception and channel tuning.



Instructions and updates

There are download files for UE40JU6610UXTK   from the manufacturer:

Latest software updates, firmwares (latest firmwares):
File Type File Name Version Date Size
Firmware Update User Manual 2015_TV_Firmware_Upgrade_Instruction_T-HKMDEUC.pdf 1.0 10.08.2015 0.36 Mb
Update file (USB) T-HKMDEUC_1550.0.exe 1550.0 03.12.2019 1637.59 Mb
Update file (USB) T-HKMDEUC_1550.0_RU.exe 1550.0 10.01.2020 1637.59 Mb

User Manuals (User Manuals):
File Type File Name Version Date Size
ENG_HMUDVBEUJ-1.312 User Manual - 06.08.2015 7.66 Mb
User manual RUS_HMUDVBEUJ-1.312.pdf - 06.08.2015 7.57 Mb
Quick guide JU6610-RU_BN68-07200H-00L04-0408-2.pdf 1.0 27.05.2015 13.91 Mb
Installation Guide UJ6T-JU6510-QSG_BN68-07137H-01-0310.pdf - 02.09.2015 0.01 Mb
Installation Guide UJ6T-JU6510-under_40inch-QSG_BN68-07137S-01-0310.pdf - 02.09.2015 0.01 Mb

You can download the files from the manufacturer's website for the model UE40JU6610UXTK.



SAMSUNG UE40JU6610U TV with an LCD, 40" (102 cm) diagonal size 16:9 format. In the manufacturing technology of the display of this model is implemented LED backlighting.
The design and technical capabilities of the TV can realize the image in the highest quality UHD at a resolution of 3840x2160 pixels in 4K UHD standard.
UE40JU6610U TV is equipped with SMART software, built-in applications and the ability to connect to the Internet. Connection to the network can be made via Wi-Fi wireless communication. Input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphical processing of a digital signal is done in 480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 2160p. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
The sound system capacity of 20 W (2x10 W) is provided by two speakers. NICAM stereo sound processing system and Sound Surround surround function are used.
Communication with other devices via an external interface is supported by standard input and output sockets: antenna input (RF), AV, component, HDMI x4, MHL, USB x3, Ethernet (RJ-45), Bluetooth, Wi-Fi. There is a headphone jack. There is a VGA (D-Sub 15) connector to connect a computer or laptop to this TV model. This interface supports standard resolutions: 1920x1080, 3840x2160. The digital tuner is capable of receiving DVB-T, DVB-T2, DVB-C, DVB-S2 TV channels.

Power consumption in mains mode is 132 W.

Overall dimensions: with stand 918x587x296 mm, without stand 918x536x104 mm.

TV weight: with stand 10.2 kg, without stand 8.1 kg.

ATTENTION! The panel of the SAMSUNG UE40JU6610U LED TV is an expensive and unreliable part of it.
Do not allow any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also not safe to get liquid on the screen. Sometimes one drop is enough if it drips down the glass onto the cables and the TV becomes unrepairable.