REPAIRING / SERVICING TV DAEWOO L43R630VKE

Technical description and composition of the DAEWOO L43R630VKE TV, panel type and modules used. The composition of the modules.

DAEWOO LED
Model: L43R630VKE

Chassis / Version: MSD3463-T8C1

Panel: K430WD7

T-CON: 6870C-0532A; TL2375EP, SW5084B, BR24T08-W

LED driver (backlight): integrated into MainBoard

PWM LED driver: MP3394S

MOSFET LED driver: AOD256

Power Supply (PSU): integrated into MainBoard

PWM Power: OB5269CP

MOSFET Power: AOTF10N65

MainBoard: MSD3463-T8C1

IC MainBoard: CPU: MSD3463-GSA, SPI Flash: MX25L6406E, Audio: TPA3110D2

Tuner: SI2151

Specifications L43R630VKE
DAEWOO L43R630VKE
General recommendations for TV LCD LED repair
Possible manifestations of defects

- TV DAEWOO L43R630VKE does not turn on at all. Control lamps do not light up or blink. The TV on the remote control and control panel buttons does not respond.

In such cases, the main power supply, the AC / DC converter of the mains voltage, which is combined with the MainBoard MSD3463-T8C1, may be faulty. Then you should measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of the power switches (AOTF10N65) and rectifier diodes of the converters for a possible short circuit.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in an emergency mode of short circuit without output voltages, and with a short circuit in the elements of the primary circuit, the mains fuse most often breaks off immediately and less often the current sensor in the source of the key.
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. OB5269CP 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.

- There is no picture, but there is sound and all other functions work. Sometimes when you turn it on, the image appears and disappears for a second.

In such cases, a malfunction of the LED panel backlighting elements is most likely. 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.
It is impossible to check the line of series-connected LEDs without a special current source, and it is unsafe for them to use any voltage sources above 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Usually, Chinese multimeters with 9V power supply lightly light up one 3-volt LED, if you connect the probes to it in the forward direction, the red probe to the anode, and the black one to the cathode. 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.

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

Repair or diagnostics of the MSD3463-T8C1 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). If it is not possible to replace the MB (SSB) board, it is necessary to check the serviceability of its elements - CPU: MSD3463-GSA, SPI Flash: MX25L6406E, Audio: TPA3110D2. Defective components must be replaced.

Before replacing the SI2151 tuner, if there is no tuning to the channels, you must first check the software and the supply voltage at its outputs. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus

If the DAEWOO L43R630VKE has no picture, but there is sound, the K430WD7 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 K430WD7 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 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 the main board MainBoard MSD3463-T8C1 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 MSD3463-T8C1 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 DAEWOO L43R630VKE TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!

DOWNLOAD SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>   MainBoard (Chassis) MSD3463-T8C1.

DOWNLOAD FIRMWARE FOR SPI FLASH  ----------->  DAEWOO L43R630VKE, Main: MSD3463-T8C1, Panel: K430WD7.

 

You can reduce the backlight current by changing the values ​​of the two resistors connected in parallel between pin 6 of the ISET MP3394S and the case.
10 k and 15 k, total 6 k, current 290 mA.
15 k and 15 k, total 7.5 k, current 240 mA.

Additional MainBoard Repair

The appearance of the MainBoard MSD3463-T8C1 is shown in the figure below:

MSD3463-T8C1

MSD3463-T8C1 can be used in TVs:

PHILIPS 32PHT4001/60 (Panel K320WD92), PHILIPS 43PFT4001/60 (Panel K430WD9), TELEFUNKEN TF-LED39S35T2 (Panel K390WD5 K390WD5UB280H200), TELEFUNKEN TF-LED32S35T2 (Panel K320WD5).




Main features of the DAEWOO L43R630VKE device:

Installed matrix (LED panel) K430WD7.
Matrix control uses the Timing Controller (T-CON) 6870C-0532A;
To power the backlight LEDs, a converter combined with the MSD3463-T8C1 main board is used, controlled by the MP3394S PWM controller. AOD256 type keys are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter using OB5269CP microcircuits and AOTF10N65 power switches.
MainBoard - the main board (motherboard) is an MSD3463-T8C1 module, using CPU chips: MSD3463-GSA, SPI Flash: MX25L6406E, Audio: TPA3110D2 and others.
The SI2151 tuner provides reception of television programs and tuning to channels.



LED TV DAEWOO L43R630VKE with LCD K430WD7, diagonal size 43 "(109 cm) 16: 9 format. The required screen brightness of 260 cd / m² is provided by LED backlighting. Dynamic contrast ratio of 5,000,000: 1 is achieved by a special control of LED operation. The display technology of the model is realized with LED backlighting.
The K430WD7 matrix and software (software) of the MainBoard MSD3463-T8C1 are capable of realizing images in high quality HD at a resolution of 1920x1080 pixels in a graphic resolution according to the 1080p (Full HD) standard. The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Graphic processing and formation of a digital signal occurs in the standards 480i, 480p, 576i, 576p, 720p, 1080i. Supported media file formats: MP3, MPEG4, JPEG.
Speaker power 16 W (2x8 W) is provided by two speakers. Uses the NICAM stereo signal processing system and the Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, VGA, HDMI x3, USB x2. A VGA (D-Sub 15) connector is used to connect a computer or laptop. This interface supports resolutions: 640x480, 800x600, 1024x768, 1280x1024, 1360x768, 1920x1080. The digital tuner is capable of receiving TV channels in DVB-T, DVB-T2 standards.

A power supply unit is used as part of the MainBoard.

Dimensions: With stand 908x576x216 mm, Without stand 908x528x81 mm.

Attention! Panel K430WD7 LED TV DAEWOO L43R630VKE 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.  

It is also unsafe COLA DRINKING, COFFEE DRINKING AND CAT PISSINGS............ ON GARBAGE TV SETS.

REPAIRING / SERVICING TV DAEWOO L32V680VKE

Technical description and composition of the DAEWOO L32V680VKE TV, panel type and modules used. The composition of the modules.

DAEWOO LED
Model: L32V680VKE

Chassis / Version: MSD3663-T5C2

Panel: LC320DXY-SLA2 // K320WDC1B

LED backlight: K320WDX A2

T-CON: 6870C-0442B

LED driver (backlight): integrated into MainBoard

PWM LED driver: OB3353CP

MOSFET LED driver: P8010BD

Power Supply (PSU): integrated into MainBoard

PWM Power: LNK6777K

MainBoard: MSD3663-T5C1 // MSD3663-T5C2

IC MainBoard: SPI FLASH: GD25Q64

Tuner: ST43WS-2A-E

Specifications L32V680VKE
DAEWOO L32V680VKE
General recommendations for TV LCD LED repair
Possible manifestations of defects

- DAEWOO L32V680VKE does not turn on, does not respond to buttons and the remote control, indicators on the front panel do not light or blink.

In this case, the main Switching Power Supply - AC / DC mains voltage converter, the elements of which are located on the MainBoard MSD3663-T5C1 main board - may be faulty. Then you should measure its output voltages and, in case of their complete or partial absence, it is necessary to check the serviceability of the power switches and rectifier diodes of the converters for the presence of a possible short circuit.
In case of breakdowns in the secondary circuits of the converter, it can usually work in an emergency mode in a short circuit mode, and with a short circuit in the power elements of the primary circuit, the mains fuse or current sensor in the source of the key is most often cut off.
The 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), if they do not have visible damage to the case and an outright short circuit between the terminals, are usually checked by replacing.

- 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. Often the reason is a malfunction of the LEDs (open circuit, short circuit ...), or the connectors of the K320WDX A2 strips (strings), less often the LED driver is faulty.
It is impossible to check the line of series-connected LEDs without a special current source, and it is unsafe for them to use any voltage sources above 12V for this purpose. Then all that remains is to open the panel and check each LED separately. Usually, Chinese multimeters with 9V power supply lightly light up one 3-volt LED, if you connect the probes to it in the forward direction, the red probe to the anode, and the black one to the cathode. 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 DAEWOO L32V680VKE has no picture, but there is sound, often the LC320DXY-SLA2 display backlight 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 LC320DXY-SLA2 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 MSD3663-T5C1 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 MSD3663-T5C1 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 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 MSD3663-T5C1 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 SPI FLASH: GD25Q64. BGA chip faults are usually easy to detect by warm-up.

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 ST43WS-2A-E tuner and update the software. I2C communication pulses must be monitored with an oscilloscope.

Attention to TV owners! Attempts to repair DAEWOO L32V680VKE by yourself are not recommended by the manufacturer and can lead to serious negative consequences!

 

Backlight current limitation. OB3353CP. General recommendations

To reduce the backlight current in LED drivers with OB3353CP controller, increase the resistance of the current sensor - a block of low-resistance resistors to which the cathodes of LEDs are connected. The signal from the sensor is fed to the FB input of the OB3353CP microcircuit (pin 5).

DOWNLOAD SCHEMATIC  MANUAL FOR IC   ------------------>   OB3353A


The appearance of the MainBoard MSD3663-T5C1 is shown in the figure below:

MSD3663-T5C1

Main features of the DAEWOO L32V680VKE device:

Installed matrix (LED panel) LC320DXY-SLA2 or K320WDC1B.
Matrix control uses the Timing Controller (T-CON) 6870C-0442B.
To power the backlight LEDs, a converter combined with the MSD3663-T5C1 main board is used, controlled by the OB3353CP PWM controller. The keys of the P8010BD type are used as power elements of the LED driver.
The power module is combined with the MainBoard and is made according to the AC / DC flyback voltage converter using LNK6777K microcircuits.
MainBoard - the main board (motherboard) is an MSD3663-T5C1 module, using SPI FLASH chips: GD25Q64 and others.
The ST43WS-2A-E tuner provides reception of television programs and tuning to channels.



LED TV DAEWOO L32V680VKE with LCD display LC320DXY-SLA2, diagonal size 32 "(81 cm) 16: 9 format. The display technology of the model is implemented with LED backlighting.
The LC320DXY-SLA2 matrix and software (software) of the MainBoard MSD3663-T5C1 are capable of realizing HD image quality at a resolution of 1366x768 pixels in 720p (HD Ready). Supported media file formats: MP3, MPEG4, DivX, MKV, JPEG.
Speaker power 12 W (2x6 W) is provided by two speakers. Uses NICAM stereo processing system and Sound Surround function.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, component, VGA, HDMI x2, USB. A headphone output 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 consumed by the TV operating in mains mode is 55 W. MainBoard power supply.

Dimensions: with stand 732x484x184 mm, without stand 732x432x76 mm.

TV weight: 3.9 kg.

Attention! Panel LC320DXY-SLA2 LED TV DAEWOO L32V680VKE 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.

 

DAEWOO DTD 21H9 AND DTD 14H9 COLOUR TV HOW TO ENTER THE SERVICE MODE CHASSIS CP 093 -- FULL SCHEMATIC

  MICROCONTROLLER CONFIGURATION - SERVICE MODE

1 Select PR. number 91

2  Adjust sharpness to minimum and exit all menus.

3 Within 2 seconds press the key sequence : RED - GREEN – menu.

The software version is displayed beside the word Service, e.g. “SERVICE VER 00.05”.

To exit SERVICE menu press menu key or Std By key.

SERVICE MODE NAVIGATION

PR Up/Down remote keys :    Cycle through the service items available.

Vol -/+ remote keys :    Dec/Increment the values within range – Cycle trough option bits.

OK key :    Toggle bits in option byte.

MICROCONTROLLER CONFIGURATION: OPTION BITS

There are two option bytes available (16 bits in all). These option bits are available from Service mode. 

First find the OPTION1 or OPTION2 control, and then use the Volume PLUS/MINUS buttons on the remote control keypad to locate the bits, and OK key to toggle them. The table below shows the two option bytes available;

NVM default setting

The purpose of this message, when you change a virgin EEPROM, is to allow to modify the NVM DATA to desired values.

1 Introduction:

The NVM default values are fixed for the user, but for flexibility in service, these data are stored in NVM and can be changed when the TV set is in a special mode call "NVM EDITOR". This mode can only be access from "FACTORY" mode.

2 Entering into "FACTORY" mode.

To switch the TV set into FACTORY mode, use the factory remote control, and press on “SVC” key. The factory menu will appear on the screen, showing “FACTORY” , plus other relevant information like software version and date.

WARNING: When in "FACTORY" mode you should not press any key other than the keys described in the procedure below. Unwanted key stroke could misadjust the TV set.

3  Entering into "NVM EDITOR" mode.

To switch the TV set into NVM EDITOR mode, use the user remote control, and press on “ON/ENTER” key. The NVM EDITOR window will appear on the screen. This mode allow you to access all data stored in NVM. The current NVM address is given in column "ADDR." in both

Decimal and Hexadecimal format. The column DATA gives the value contained at selected address in both Decimal and Hexadecimal format.

4 Navigation in "NVM EDITOR" mode.

Use Program Up/Dwn keys to select the desired address. Use Volume Up/Down keys to change the data at selected address. You must press " OK/ENTER" key to store value after modification.

The data can be adjusted between 0 and 63.

5 Exit "NVM EDITOR" mode.

To switch the TV set back into FACTORY mode, use the user remote control, and press on “MENU” key.

The factory menu will appear on the screen, showing “FACTORY”.

6 Exit "FACTORY" mode.

To exit "FACTORY" mode, use the factory remote control, and press on “SVC” key.

The factory menu will disappear from the screen.

NVM DATA CHANGE LIST

The UOCIII series combines the functions of a Video Signal Processor (VSP) together with a FLASH embedded TEXT/Control/Graphics m-Controller (TCG m-Controller) and US Closed Caption decoder. In addition the following functions can be added:

Adaptive digital (4H/2H) PAL/NTSC combfilter

Teletext decoder with 10 page text memory

Multi-standard stereo decoder

BTSC stereo decoder

Digital sound processing circuit 

Digital video processing circuit

PWB Component and print sides

Circuit diagram:  CP093 AND CP093F

DAEWOO DTQ 29U1SC, DAEWOO DTQ 29U5SC – CHASSIS CN 794N HOW TO ENTER THE SERVICE MODE, ADJUSTMENTS, FULL SCHEMATIC AND MORE

Daewoo DTQ 29U1SC, Daewoo DTQ 29U5SC – How to enter the service mode, adjustments, full schematic and more – Chassis CN 794N

Used ICs: LC86386A 51S2-System control, 24C16B, 115 V F025AR-Tuner, MR2540-SMPS controller STR, LA7848-Vertical scan output IC, VDP3130Y-Luminance Chroma jungle, MSP3420G B8, TDA8946-Audio output IC, TEA5101B-Video output IC (CRO controller), FF A9404 8L-FBT, 2SD2578-Horizontal Out Transistor,

How to enter the service mode using the user remote control.

• Turn the set on.

• Direct the remote control to the reception window of TV.

• Push buttons of remote control in sequence as follows.

[1 > MUTE > DISPLAY > MUTE ]

• Then, the screen will appear as follows.

S2      SCRN

S5      SND

S6      GEO

S7      VDP

S8     W/B

S9     DP

S12    FACT

Using the channel up or channel down button, select the item you wish to adjust.

(The colour of selected item turns into the RED.)

• Press the volume up or down button to enter in the service mode you wish to adjust.

How to memorize the adjusted values in the service mode.

• Press the DISPLAY button the state which the screen is displaying each of service menus after all adjustments are complete each of all service menu.

Screen adjustment (S2)

• Enter the service mode and select service adjustment S2.

• You can see the one horizontal line on the screen.

• Adjust the Screen Control Volume (located on FBT) so that the horizontal line on screen just disappeared.

• Press the volume up or down button to exit in the screen adjustment mode.

[IN THE SCREEN ADJUSTMENT MODE, DONT PRESS OTHER BUTTONS EXCEPT VOLUME UP OR DOWN BUTTON.]

Focus adjustment

• Turn in a local station and adjust the Focus Control knob (located on FBT) for best picture details at high light condition.

Geometric adjustments (S6)

• Select service adjustment S6

• You can see the OSD as shown in below.

Digital pre-set (DP) adjustments (S9)

Sub brightness adjustment

Receive a good local channel.

• Enter the service mode and select service adjustment S9.

• You can see the OSD as shown in below.

• Select Sub brightness item, adjust Sub brightness data value to obtain normal brightness level.

• Press the DISPLAY button to memorize the data.

CONTRAST

• Fixed value = 8

TINT

• Fixed value = 170

COLOR

• Fixed value = 0

Factory outgoing mode (S12 : FACT)

• If you select the S12, then the set becomes factory outgoing status.

• You can see the OSD “outgoing OK.

Full schematic

TEA5101B Video output IC and the schematic

IC pin configuration

PWB top and bottom views

DAEWOO DTA20, DTA21, DTE25, DTE28 HOW TO ENTER THE SERVICE MODE AND SCHEMATIC DIAGRAM

  DAEWOO DTA20, DTA21, DTE25, DTE28 - USING IC TDA9367, STR F6653, USING IC TDA9365, STR F6653 - HOW TO ENTER THE SERVICE MODE

ATSS sorting method: The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV controlling software for each program checks if a VPS CNI code is transmitted. If no VPS CNI code is found, the system check if a CNI code is transmitted in the teletext lines ( Packet 8/30 format 1 ). If such a code ( VPS or teletext ) is found and if this code is in the ATSS list, the program is automatically named.
The programs found are then sorted in 4 groups

Group I : It contains all the programs from the selected country and named by the TV controlling software. Within this group the sorting order is fixed by the ATSS list.
Group II : It contains all the programs with a strong signal strength which are not listed in group I.
Group III : It contains all the programs with a weak signal strength which are not listed in group I.
Group IV : If two or more programs with the same code are found, only the strongest ( or if they have the same level the one with the lowest frequency) is listed in group I, II or III. The others are listed in group IV.

Note : If two programs with the same name but a different code are found these two programs are listed in group I, II or III ( e.g. Regional program SW3 in Germany ).

The sorting order within group II, III, and IV is based on the channel frequency. The program with the lowest frequency is allocated the first rank in its group, and so forth until the last program of the group which has the highest frequency.

Special case : Country selection =  Others

Special case : France
If France is selected the TV controlling software sweeps the whole TV bands firstly with France system selected ( positive video modulation) and secondly with Europe system selected ( negative video modulation).

Special case : Switzerland
If Switzerland is selected the TV controlling software sweeps the whole TV bands firstly with Europe system selected (negative video modulation) and secondly with France system selected ( positive video modulation).

Special case : GB
Note for satellite receiver users : Before starting ATSS turn On your satellite receiver and tune “ SKY NEWS “.
If GB is selected the TV controlling software seeks for programs only in UHF ( C21 to C70 ). The sorting order is :
1 - BBC1
2 - BBC2
3 - ITV
4 - CH4
5 - CH5
6 – NEWS

If two or more “ identical “programs ( same name but different code e.g. BBC1 and BBC1 Scotland ) are found the following programs in the list will be shifted up. (1 - BBC1, 2 - BBC1, 3 - BBC2, 4 - ITV, 5 - CH4, 6 - CH5, 7 - NEWS, ..)

If one of the program above is not found, the associated program number remains empty ( freq.=467.25
Mhz - Skip selected - no name - system=GB).
example A : 1 - BBC1, 2 - BBC2, 3 - ITV, 4 - -----, 5 - CH5, 6 - NEWS, ...
example B ( if 2 BBC1 found ) : 1 - BBC1, 2 - BBC1, 3 - BBC2, 4 - ITV, 5 - -----, 6 - CH5, 7 - NEWS, ...

Alignment

Microcontroller configuration : Service mode
To switch the TV set into service mode please see instruction below.

1 - Select pr. number 91
2 - Adjust sharpness to minimum and exit all menu.
3 - Quickly press the key sequence : RED - GREEN – menu

To exit SERVICE menu press menu key or Std By key.

In Service Mode press “OK” to stop the microcontroller i.e. the I2C bus is free and the set can be controlled by external equipment. Press “OK” again to allow the microcontroller to control the set again.

Data Capture: The Data Capture section takes in the analogue Composite Vidéo and Blanking Signal (CVBS), and from this extracts the required data, which is then decoded and stored in memory.

The extraction of the data is performed in the digital domain. The first stage is to convert the analogue CVBS signal into a digital form. This is done using an ADC sampling at 12MHz. The data and clock recovery is then performed by a Multi-Rate Video Input Processor (MuIVIP). From the recovered data and clock the following data types are extracted WST Teletext (625/525), Closed Caption, VPS, WSS.
The extracted data is stored in either memory (DRAM) via the Memory Interface or in SFR locations.

TDA894xJ Stereo Audio Amplifier

The TDA 8944J ( TDA 8946J ) is a dual-channel audio power amplifier with an output power of 2 x 7 W ( 2 x 15 W ) at an 8 W load and a 12 V supply. The circuit contains two Bridges Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic. The TDA8944J comes in a 17-pin DIL power package.

Daewoo schematic using IC TDA9365, STR F6653

Daewoo schematic using IC TDA9367, STR F6653

REPAIR / SERVICING TV DAEWOO U43V890VTE

Technical description and composition of the DAEWOO U43V890VTE TV, panel type and applicable modules. The composition of the modules.
DAEWOO LED
Model: U43V890VTE
Chassis / Version: 40-MS88S2-MAC2HG
Panel: LVU430LGDXE0001
LED backlight: TCL43D08-ZC23AG-07 303TC430031
T-CON: 6870C-0738A
LED driver (backlight): integrated into PSU
PWM LED driver: MP3398A
MOSFET LED driver: PC015BD
Power Supply (PSU): DLBB449 REV0.3 SHG4301A09-101H (SHG4301A-101H)
PWM Power: OB5269CPA,
MOSFET Power: MDF10N60B,
MainBoard: 40-MS88S2-MAC2HG 1MS488ZZAEU.01
IC MainBoard: AUDIO: TAS5707
Tuner: DVB-T2 & SAT
Technical Specifications U43V890VTE
DAEWOO U43V890VTE
General repair guidelines for TV LCD LED
Possible malfunctions
- DAEWOO U43V890VTE TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
Typically, with such manifestations, the defect is caused by faulty elements in the main power supply module DLBB449. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of power switches (MDF10N60B,) and rectifier diodes for possible breakdown (short circuit).
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in 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 at the source of the key.
Mos-Fet power switches, used in switching power supplies, sometimes fail due to a malfunction of any other elements that can put it out of operation in key mode or create an excess of the maximum permissible parameters of the switch. These can be elements supplying the PWM controller, frequency-setting or damping circuits, or negative feedback elements in the stabilization circuit. PWM controllers OB5269CPA,, in the absence of visible damage or explicit short-circuit between the terminals, are checked by replacing with new, or obviously working.
- There is no image, there is sound, all other functions of the TV work. When turned on, the image may sometimes appear for a second.
The most likely in these cases is a malfunction of the LED backlight. 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 also turns out to be faulty.
To check the LED strips 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 transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the 40-MS88S2-MAC2HG motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - AUDIO: TAS5707 with new or obviously good ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
The malfunction of the DVB-T2 & SAT tuner is established after checking the software and all supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.

Attention to users! Self-repair of a DAEWOO U43V890VTE TV without the appropriate qualifications and necessary experience can lead to its complete non-repairability!

SCHEMATIC DIAGRAM  / SERVICE MANUAL   ------------------>    SHG4301A-101H DLBB449 Power supply

 The appearance of the MainBoard 40-MS88S2-MAC2HG is shown in the figure below:
40-MS88S2-MAC2HG
The appearance of the power supply
Main features of the DAEWOO U43V890VTE device:
The matrix (LED panel) LVU430LGDXE0001 is installed.
The matrix control uses the Timing Controller (T-CON) 6870C-0738A.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the MP3398A PWM controller. As the power elements of the LED driver, keys of the type PC015BD are used.
The necessary supply voltages for all nodes of the DAEWOO U43V890VTE TV are generated by the DLBB449 power module, or its analogs using OB5269CPA microchips, and power switches of the MDF10N60B type,.
MainBoard - the main board (motherboard) is a 40-MS88S2-MAC2HG module, using AUDIO chips: TAS5707 and others.
The DVB-T2 & SAT tuner allows you to receive television programs and tune to channels.


 Brand: DAEWOO, Model: U43V890VTE.
Briefly from the TV: LCD, LED backlight, 42.5 ", 3840x2160, 4K UHD, DVR, there is a satellite tuner, sound: 16W, HDMI connectors: 3, Internet access, Wi-Fi, Smart TV.
Manufacturer: HORIZON plant, Belarus, Minsk, st. S. Kovalevskoy, 62. Developer: Dongbu Daewoo Electronics Corporation.
The composition includes MainBoard 40-MS88S2-MAC2HG 1MS488ZZAEU.01 and LCD-panel LVU430LGDXE0001.
Power Supply Unit (PSU) SHG4301A09-101H DLBB449 REV0.3 Power Supply.
Technical description
DAEWOO U43V890VTE LED TV with an LVU430LGDXE0001 LCD display, diagonal size 42.5 "(108 cm) in 16: 9 format. The required screen brightness of 240 cd / m² is provided by LED backlight LED. The LED display backlight is implemented in the model’s display technology. Viewing is possible movies in the highest possible UHD quality with a resolution of 3840x2160 pixels in the 4K UHD standard.The U43V890VTE TV model has built-in SMART software and the installed Android Operating System.
Connecting to a network can be done via Wi-Fi.
Supported media file formats: MP3, WMA, MPEG4, HEVC (H.265), DivX, MKV, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, VGA, HDMI x3, MHL, USB x2, Ethernet (RJ-45), Wi-Fi 802.11n, WiDi. An output for connecting headphones is provided. The digital tuner is capable of receiving television channels in the standards DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2.
Overall dimensions: with stand 969x622x222 mm, without stand 969x572x79 mm.
TV Weight: with stand: 8 kg, without stand: 7.9 kg.
Attention! The panel of the LVU430LGDXE0001 LED-TV DAEWOO U43V890VTE is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.

REPAIR / SERVICING TV DAEWOO L43S645VTE

Technical description and composition of the DAEWOO L43S645VTE TV, type of panel and applicable modules. The composition of the modules.
DAEWOO LED
Model: L43S645VTE
Chassis / Version: TP.MS3463S.PB782
Panel: LVF430LGDO E3 V11
LED backlight: JL.D43081330-140FS-M
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP3398A
MOSFET LED driver: ME15N10-G
Power Supply (PSU): integrated into MainBoard
PWM Power: LD7536R PWM SOT23-6
MOSFET Power: 7N65
MainBoard: TP.MS3463S.PB782 3MS63AX2
IC MainBoard: SPI FLASH: 25Q64, AUDIO: TPA3110LD2
Tuner: XF-3SDT-H (R840)
Technical Specifications L43S645VTE
DAEWOO L43S645VTE
General repair guidelines for TV LCD LED
Possible manifestations of defects
- DAEWOO L43S645VTE TV does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
First of all, in such cases, you should make sure that the common switching power supply (IIP) is the AC / DC voltage converter of the mains voltage. All source elements in this TV model are located on the MainBoard TP.MS3463S.PB782 main board. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, check the serviceability of the power switches (7N65) and rectifier diodes for possible breakdown (short circuit).
In case of any breakdown of semiconductors in the secondary circuits, the converter can usually work normally in 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 at the source of the key.
Breakdown of power switches (MosFet) in pulsed sources is sometimes caused by malfunctions of other circuit elements, for example, in circuits supplying a PWM controller, frequency-setting or damper ones, as well as in negative feedback circuits (OOS) of stabilization. PWM controllers (PWM) LD7536R PWM SOT23-6, if they do not have visible damage to the chassis and open short circuit between the terminals, are usually checked by replacement.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
The faulty usually in these cases is the backlight matrix (LED-panel). More often the reason for this is the breakdown of the LEDs, or poor contact in the connectors of the strips, less often the LED driver may be malfunctioning.
When trying to detect a break in the LED lines, it should be taken into account that it is difficult to do this without disassembling the panel. For example, a current source is needed to open PN junctions connected in series.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the TP.MS3463S.PB782 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). If it is not possible to replace the MB (SSB) card, you need to check the health of its elements - SPI FLASH: 25Q64, AUDIO: TPA3110LD2. Defective components should be replaced.
If the TV works normally from external devices, but does not tune into television channels, the tuner XF-3SDT-H (R840) may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.

We recommend the owners of the L43S645VTE TV for repair only to qualified specialists with the necessary work experience! Self-repair attempts without the appropriate knowledge and skills can lead to irreversible negative consequences!

FIRMWARE FOR SPI FLASH  ----------->   DAEWOO L43S645VTE, Main: TP.MS3463S.PB782 3MS63AX2, Panel: LVF430LGDO E3 V11

1.  The appearance of MainBoard TP.MS3463S.PB782 is shown in the figure below:

TP.MS3463S.PB782
TP.MS3463S.PB782 can be used in TVs:
DAEWOO L32S645VTE (Panel ST3151A05-8 VER.2.4), TELEFUNKEN TF-LED32S20T2 (Panel ST3151A05-8 Ver.2.5 LVW320CSDX), TELEFUNKEN TF-LED32S17T2 (Panel ST3151A05-8).
Main features of the device DAEWOO L43S645VTE:
Installed matrix (LED-panel) LVF430LGDO E3 V11.
To power the backlight LEDs, a converter is used, combined with the TP.MS3463S.PB782 main board, controlled by the MP3398A PWM controller. As power elements of the LED driver, keys of the type ME15N10-G are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using LD7536R PWM SOT23-6 microcircuits and type 7N65 power switches.
MainBoard - the main board (motherboard) is a module TP.MS3463S.PB782, using microchips SPI FLASH: 25Q64, AUDIO: TPA3110LD2 and others.
Tuner XF-3SDT-H (R840) provides the reception of television programs and tuning to channels.
Brand: DAEWOO, Model: L43S645VTE.
Briefly from the TV: LCD, LED backlight, 43 ", 1920x1080, 1080p Full HD, DVR, sound: 16W, HDMI: 2.
The composition uses MainBoard TP.MS3463S.PB782 and an LCD panel (matrix) LVF430LGDO E3 V11. The power supply is combined with the MainBoard.
DAEWOO L43S645VTE LED TV with an LVF430LGDO LCD display, diagonal size 43 "(109 cm) in 16: 9 format. The required screen brightness of 240 cd / m² is provided by LED backlight LED. The LED display backlight is implemented in the model’s display technology. Design and the TV’s technical capabilities include watching broadcasts and movies in high quality HD at a resolution of 1920x1080 pixels in graphic resolution according to the 1080p (Full HD) standard. Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), VGA, HDMI x2, MHL, USB. An output for connecting headphones is provided. A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: With a support of 977x624x216 mm, Without a support of 977x574x91 mm.
Attention! The panel of the LVF430LGDO E3 V11 LED-TV DAEWOO L43S645VTE is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable.

REPAIR / SERVICING TV DAEWOO L40S645VTE

Technical description and composition of the DAEWOO L40S645VTE TV, type of panel and applicable modules. The composition of the modules.
DAEWOO LED
Model: L40S645VTE
Chassis / Version: TP.MS3463S.PB783
Panel: LVF400SSDE E3 V55
LED backlight: CRH-ES40WW3030080358UREV1.1B
LED driver (backlight): integrated into PSU
PWM LED driver: MP3398A
MOSFET LED driver: ME15N10-G
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MainBoard: TP.MS3463S.PB782 3MS63AX2 02-SHV63A-C0020000 024
IC MainBoard: SPI FLASH: 25Q64, AUDIO: TPA3110LD2
Tuner: XF-3SDT-H (R840)
Control: IR: 40-22D160-IRE2LG
Technical Specifications L40S645VTE
DAEWOO L40S645VTE
General repair guidelines for TV LCD LED
Possible manifestations of defects
- The DAEWOO L40S645VTE TV does not turn on and does not show any signs of turning on, it does not respond to the control buttons or the remote control.
In such cases, the AC / DC voltage converter, which is combined with the main board TP.MS3463S.PB782, is often faulty. It is necessary to measure the output voltages in its secondary circuits, and if they are completely absent, it is necessary to check the serviceability of power switches and rectifier diodes for possible breakdown (short circuit).
In case of any breakdowns in the secondary circuits, the converter can operate in emergency short circuit mode, and during short circuit in the power elements of the primary circuit, the mains fuse or the current sensor at the source of the key more often breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM SOT23-6 PWM chips are usually checked by replacing with new ones, or obviously working.
- There is no image, but there is sound and reaction to commands from the remote control. Or the image appears immediately after turning on and disappears.
In most of these cases, a malfunction is detected in the nodes and backlight elements of the LED panel. The reason can be both in the power supply of the LEDs, in their serviceability (breakdown or breakage), as well as in the violation of the contact connections of the LED strips.
To check the LED strips 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 transitions in forward bias, you can sometimes detect the presence of a PN junction of the protective zener diode by connecting the probes in the opposite direction. If the zener diode is broken or broken in short-circuit, then the LED is faulty and needs to be replaced.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the TP.MS3463S.PB782 motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - SPI FLASH: 25Q64, AUDIO: TPA3110LD2 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
The malfunction of the tuner XF-3SDT-H (R840) is established after checking the software and all the supply voltages at its terminals. The data exchange of the tuner with the processor via the I2C bus can be controlled by an oscilloscope.

It should be remembered! Attempts to independently repair the DAEWOO L40S645VTE 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!

To reduce the backlight current, the total resistance of the resistors relative to the housing on the ISET pin of the MP3398A should be proportionally increased. ISET (current setting) - pin 8 in the SOIC-20 package or pin 6 in the SOIC-16 package.


The appearance of MainBoard TP.MS3463S.PB782 is shown in the figure below:
TP.MS3463S.PB782
TP.MS3463S.PB782 can be used in TVs:
DAEWOO L32S645VTE (Panel ST3151A05-8 VER.2.4), TELEFUNKEN TF-LED32S20T2 (Panel ST3151A05-8 Ver.2.5 LVW320CSDX), TELEFUNKEN TF-LED32S17T2 (Panel ST3151A05-8).
Main features of the DAEWOO L40S645VTE device:
Installed matrix (LED-panel) LVF400SSDE E3 V55.
To power the backlight LEDs, a converter is used, combined with the power supply, controlled by the MP3398A PWM controller. As power elements of the LED driver, keys of the type ME15N10-G are used.
The power module is combined with the MainBoard and is made according to the flyback AC / DC voltage converter circuit using PWM SOT23-6 microcircuits.
MainBoard - the main board (motherboard) is a module TP.MS3463S.PB782, using microchips SPI FLASH: 25Q64, AUDIO: TPA3110LD2 and others.
Tuner XF-3SDT-H (R840) provides the reception of television programs and tuning to channels.

Brand: DAEWOO, Model: L40S645VTE.
Briefly from the TV: LCD, LED backlight, 40 ", 1920x1080, 1080p Full HD, DVR, sound: 16W, HDMI: 2.
The composition includes MainBoard TP.MS3463S.PB783 3MS63AX2 02-SHV63A-C0020000 024 and LCD-panel LVF400SSDE E3 V55. The power supply is combined with the MainBoard.
Technical description
DAEWOO L40S645VTE LED TV with LVF400SSDE LCD, 40 "(102 cm) diagonal, 16: 9 format. LED display technology is implemented in the model’s display technology. The design and technical capabilities of the TV include watching programs and movies in high quality HD at Resolution 1920x1080 pixels in graphic resolution according to the standard 1080p (Full HD). Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
The power of the sound speaker system 16 W (2x8 W) is provided by two speakers. It uses a NICAM stereo signal processing system and Sound Surround.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), VGA, HDMI x2, MHL, USB. A digital tuner is capable of receiving television channels in the DVB-T MPEG4, DVB-C, DVB-T2 standards.
Overall dimensions: With stand 924x595x216 mm, Without stand 924x550x86 mm.
Attention! The LVF400SSDE E3 V55 panel of a DAEWOO L40S645VTE LED TV is an expensive and unreliable element.
Avoid any impact on the glass and pressure on the surface of the screen to avoid damage to the LED panel!
It is also unsafe to get liquid on the screen. Sometimes one drop is enough if it flows down the glass onto the cables so that the TV becomes unrepairable