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.