Technical
description and composition of the DAEWOO L32S645VTE TV, type of panel
and applicable modules. The composition of the modules.DAEWOO LED
Model: L32S645VTE
Chassis / Version: TP.MS3463S
Panel: ST3151A05-8 VER.2.4
T-CON: MT3151A05-5-XC-9
LED driver (backlight): integrated into MainBoard
PWM LED driver: MP3398A
MOSFET LED driver: ME15N10-G
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6 LD7536R
MOSFET Power: 7N65
MainBoard: TP.MS3463S.PB782 3MS63AX2
IC MainBoard: SPI FLASH: 25Q64, AUDIO: TPA3110LD2
Tuner: XF-3SDT-H (R840)
Technical Specifications L32S645VTE
DAEWOO L32S645VTE
General repair guidelines for TV LCD LED
Possible manifestations of defects
- DAEWOO L32S645VTE TV does not turn on. There are no signs of operability. The indicators on the front panel do not light or flash, the TV does not respond to the remote control and control buttons.
The malfunction in such cases should be sought in the elements of the power source - the network voltage converter (AC / DC), which is located on the MainBoard TP.MS3463S.PB782 main board. It is necessary to measure its output voltages and, if they are absent, check the power switches (7N65) and rectifier diodes for the short circuit probability in the converters.
In case of breakdowns of semiconductors in the secondary circuits of any converter, as a rule, it can operate in emergency short-circuit mode without output voltages, and during short circuit in the elements of the primary circuit, the main fuse and, less often, the current sensor at the source of the key are most often cut off.
Mos-Fet keys used in switching power supplies usually fail due to a malfunction of other elements that can put it out of operation in key mode or provoke an excess of the maximum current or voltage. These can be circuits supplying the PWM controller, damping or frequency-setting circuits, or elements of OOS (negative feedback) in the stabilization circuit. PWM controllers (PWM) PWM SOT23-6 LD7536R, in the absence of external damage and short circuit between the terminals, are checked by replacing with obviously good ones.
- There is no image, there is sound, it is responding to the remote control. Or immediately after turning on for a second, the image may appear and immediately disappear.
A malfunction is usually most likely in these cases at the backlight nodes of the display matrix. 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 blinks or lights constantly, the TV does not turn on, 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). 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.
In the absence of tuning to the channels of on-air or cable television, you should make sure that the software is correct, as well as in accordance with the ratings of the supply voltage at the terminals of the tuner XF-3SDT-H (R840). It is also necessary to check the presence of pulses of data exchange between the tuner and the processor via the I2C bus using an oscilloscope.
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.We recommend the owners of the L32S645VTE 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!
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 L32S645VTE device:
Installed matrix (LED panel) ST3151A05-8 VER.2.4.
The matrix control uses the Timing Controller (T-CON) MT3151A05-5-XC-9.
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 PWM SOT23-6 LD7536R microcircuits and 7N65 type 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: L32S645VTE.
Shortly from the TV: LCD, LED backlight, 32 ", 1366x768, 720p HD, DVR, sound: 10W, HDMI connectors: 2.
The composition includes MainBoard TP.MS3463S.PB782 3MS63AX2 and LCD-panel ST3151A05-8 VER.2.4. The power supply is combined with the MainBoard.
Technical description
DAEWOO L32S645VTE LED TV with an ST3151A05-8 LCD display, 32 "(81 cm) diagonal size in 16: 9 format. The required screen brightness of 220 cd / m² is provided by LED backlighting. LED display technology is implemented in the model’s display technology. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready) Supported media file formats: MP3, WMA, MPEG4, MKV, JPEG.
The power of the sound system 10 W (2x5 W) provide 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 733x478x200 mm, Without stand 733x434x92 mm.
Attention! The panel ST3151A05-8 VER.2.4 of the DAEWOO L32S645VTE 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.