Wednesday, 16 September 2020

REPAIRING / SERVICING TV SAMSUNG UE48JU6610U

Technical description and composition of the SAMSUNG UE48JU6610U TV, panel type and modules used. The composition of the modules.
SAMSUNG LED
Model: UE48JU6610U
Chassis / Version: TH01
Panel: CY-WJ048HGLV2V
LED backlight: LM41-00117A, BN41-02376A, LM41-00109Z
T-CON: BN41-02297A LSF480FN06-K
LED driver (backlight): integrated into PSU
PWM LED driver: SLC3011N
MOSFET LED driver: TO-220F
Power Supply (PSU): BN44-00807A L55S6_FHS
PWM Power: SPC7011F, FA6A20
MOSFET Power: N-FET TO-220F
MainBoard: BN41-02344D BN94-10164N
IC MainBoard: CPU: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, DDR: K4B2G1646Q-BCMA
Tuner: BN40-00318B
Control: Wi-Fi: BN59-01194E WCK730B, IR: JU7500_IR, 35346H, Button: BN94-35345C
UE48JU6610U Specifications

LCD TV LED Smart TV UHD UE48JU6610U Year of issue: 2015
Screen diagonal: 48 "(122 cm)
Screen format: 16: 9
Resolution: 3840x2160
Refresh rate: 100 Hz
LED backlight: yes
Smart: yes. Wi-Fi support - yes
Picture in Picture (PIP): Yes
HD Support: 4K UHD
Progressive scan: yes
TV standards: PAL, SECAM, NTSC
Digital tuner: DVB-T MPEG4, DVB-T2, DVB-C, DVB-S2
Teletext: yes
DTV formats: 480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 2160p
Multimedia: MP3, WMA, MPEG4, MKV, JPEG
Stereo sound: yes
Sound power: 20W (2x10W)
Acoustics: two speakers
Interface: AV, component, HDMI x4, MHL, USB x3, Ethernet (RJ-45), Bluetooth, Wi-Fi
Headphone jack: yes
TV weight: with stand: 14.2 kg
without stand: 11.3 kg
Dimensions: with stand 1084x682x310 mm
without stand 1084x633x117 mm
Mains consumption: 172 W
SAMSUNG UE48JU6610U

General recommendations for TV LCD LED repair ...........Possible malfunctions
- SAMSUNG UE48JU6610U TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or blink, the TV does not respond to control buttons.
With similar manifestations, a malfunction is most likely found in the BN44-00807A power module. It is then necessary to measure its output voltages and, in their absence, the power switches (N-FET TO-220F) and the rectifier diodes of the converters should be checked for the probability of a short circuit.
In case of any breakdowns of semiconductors in the secondary circuits, the converter can usually operate normally in an emergency short circuit mode. There are no output voltages. And with a short circuit in the power elements of the primary circuit, as a rule, the mains fuse breaks and, less often, the current sensor in the source of the key.
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 a PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM) SPC7011F, FA6A20, in the absence of external damage and short circuit between the terminals, are checked by replacing them with a known good one.
- There is no picture, but there is sound and reaction to the remote control. Or, for a second, the image may appear immediately after switching on.
Most likely in these cases is a malfunction of the LED panel backlight. Often the cause of a malfunction is the lack of current in the LED circuit, for example, their open or short circuit, or a violation of the contact connections of the connectors.

 If SAMSUNG UE48JU6610U has no picture, but there is sound, often the display backlight CY-WJ048HGLV2V 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 when the external light hits the screen.
Replacing the LEDs requires disassembling the LCD panel CY-WJ048HGLV2V - 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 you can see light 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 BN41-02344D also 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 MainBoard BN41-02344D, 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.

To test the LED strips, in order to open all the transitions of the LEDs, several tens of volts or more are needed; it is best to use a current source for such purposes. The breakage of several PN junctions connected in series cannot be detected with a multimeter or tester. In such cases, it is necessary to open the panel and check each LED. If your multimeter cannot open the LED junctions in forward bias, you can sometimes detect the presence of a protective zener diode PN junction by connecting the probes in the opposite direction. If the zener diode is cut off or broken in K / Z, then the LED is faulty and needs to be replaced.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is constantly on or blinking.
Repair or diagnostics of the BN41-02344D 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). Repair of the board and replacement of CPU chips: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, DDR: K4B2G1646Q-BCMA are made with the necessary equipment and the corresponding element base. Failures associated with the use of BGA soldering technologies can be localized by warming up.
If the TV operates normally from external devices, but does not tune to TV channels, the BN40-00318B tuner may be faulty. In such cases, first of all, you should make sure that there are supply voltages at its corresponding terminals. You also need to make sure that it is possible to exchange data btw tuner and processor data via I2C bus. Sometimes the reason for the inoperability of the tuner may be a software failure.
Owners of the UE48JU6610U TV are advised to contact only qualified specialists with the necessary experience for repair! Attempts to repair yourself without the appropriate knowledge and skills can lead to irreversible negative consequences!
Additional MainBoard Repair
The appearance of the MainBoard BN41-02344D is shown in the figure below:
BN41-02344D
External view of the power supply
The main features of the SAMSUNG UE48JU6610U device:
The matrix (LED-panel) CY-WJ048HGLV2V is installed.
Matrix control uses the BN41-02297A Timing Controller (T-CON).
A converter combined with a power supply is used to power the backlight LEDs and is controlled by the SLC3011N PWM controller. TO-220F switches are used as power elements of the LED driver.
The formation of the necessary supply voltages for all nodes of the SAMSUNG UE48JU6610U TV is carried out by the BN44-00807A power module, or its analogs using SPC7011F, FA6A20 microcircuits and N-FET TO-220F power switches.
MainBoard - the main board (motherboard) is a BN41-02344D module, using CPU chips: SDP1406, Spi Flash: 25Q40CLSIP, SOUND: NTP7415, DDR: K4B2G1646Q-BCMA and others.
Tuner BN40-00318B provides reception of TV programs and tuning to channels.

There are files to download for the UE48JU6610UXRU model from the manufacturer:Latest firmware updates (latest firmwares):File type File name Version Date SizeFirmware Update User Manual 2015_TV_Firmware_Upgrade_Instruction_T-HKMDEUC.pdf 1.0 08/10/2015 0.36 MbUpdate file (USB) T-HKMDEUC_1550.0.exe 1550.0 03.12.2019 1637.59 MbUpdate file (USB) T-HKMDEUC_1550.0_RU.exe 1550.0 10.01.2020 1637.59 MbUser Manuals and Instructions:File type File name Version Date SizeUser manual ENG_HMUDVBEUJ-1.312.pdf - 06.08.2015 7.66 MbUser manual RUS_HMUDVBEUJ-1.312.pdf - 06/08/2015 7.57 MbQuick Start Guide JU6600-RU_BN68-07201H-03L04-0520.pdf 1.0 26.05.2015 14.47 MbKINO KIT Guide VG-SWD1000-CIS-IB_Rev1.2L04-0408.pdf - 05/26/2015 2.11 MbQuick Start Guide JU6610-RU_BN68-07200H-00L04-0408-2.pdf 1.0 27.05.2015 13.91 MbInstallation Guide UJ6T-JU6510-QSG_BN68-07137H-01-0310.pdf - 02.09.2015 0.01 MbInstallation Guide UJ6T-JU6510-under_40inch-QSG_BN68-07137S-01-0310.pdf - 09/02/2015 0.01 MbFiles can be downloaded from the manufacturer's website for the UE48JU6610UXRU model.

SAMSUNG UE48JU6610U TV with LCD CY-WJ048HGLV2V, diagonal size 48 "(122 cm) 16: 9 format. The display technology of this model is implemented with LED backlighting.
CY-WJ048HGLV2V sensor and MainBoard BN41-02344D software are capable of realizing images in the highest UHD quality at 3840x2160 resolution in 4K UHD standard.
The UE48JU6610U 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. The input analog video signal is decoded in PAL, SECAM, NTSC systems. Graphic processing of a digital signal is carried out in the standards 480i, 480p, 576i, 576p, 720p, 1080i, 1080p, 2160p. 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 x4, MHL, USB x3, Ethernet (RJ-45), Bluetooth, Wi-Fi. A headphone jack is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is provided. This interface supports standard resolutions: 1920x1080, 3840x2160.
The digital tuner can receive TV channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
The power consumed when operating from the network is 172 W. Power supply BN44-00807A.
Dimensions: with stand 1084x682x310 mm, without stand 1084x633x117 mm.
TV weight: with stand: 14.2 kg, without stand: 11.3 kg.
Attention! Panel CY-WJ048HGLV2V LED TV SAMSUNG UE48JU6610U 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.