Technical description and composition of the THOMSON T32ED07U-01B TV, panel type and modules used. The composition of the modules.THOMSON LED
Model: T32ED07U-01B
Chassis / Version: TP.VST59.P8B
Panel: LC320DXE (SF) (R1)
LED backlight: 6870S-1578A
T-CON: 6870C-C442B; TPS65175, TL2357ML, OITLL-0081A
LED driver (backlight): integrated into MainBoard
PWM LED driver: LD5850GS
MOSFET LED driver: ME15N10
Power Supply (PSU): integrated into MainBoard
PWM Power: PWM SOT23-6
MOSFET Power: 7N65L
MainBoard: TP.VST59.P8B
IC MainBoard: TSUMV59XE-Z1; SPI Flash: 25Q32, ATML 24C04 TPA3110LD2
Specifications T49D21SF-01B
THOMSON T32ED07U-01B
General recommendations for TV LCD LED repair
Possible manifestations of defects
- THOMSON T32ED07U-01B TV does not turn on at all. No response to the remote control and front panel control buttons. Indicator lamps do not light up or flash.
In such cases, the main power supply, the AC / DC converter of the mains voltage, which is combined with the MainBoard TP.VST59.P8B, may be faulty. It is necessary to measure its output voltages, and if they are absent (full or partial), the serviceability of the power switches (7N65L) of the converters and rectifier diodes should be checked for a possible 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 in 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) PWM SOT23-6, in the absence of external damage and a short circuit between the terminals, are checked by replacing them with a known good one.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and immediately disappears
In some of these cases, the malfunction is caused by the lack of display backlighting. The reason for this may be an open circuit in the LED circuit, or a problem in stabilizing their power supply.
To check the LED strips for breakage without disassembling the panel, for example, a current source will help. It is impossible to open series-connected PN junctions with a simple multimeter; a voltage of the order of several tens of volts is required.
- 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 TP.VST59.P8B 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 attempts to repair the MB (SSB) board, it is necessary to check the serviceability of its elements - TSUMV59XE-Z1; SPI Flash: 25Q32, ATML265C, TPA3110LD2 which may require replacement with new ones. If a BGA processor is installed, there is a possibility that the soldering of the contacts of its pins with the board is broken (detected by warming up).
If THOMSON T32ED07U-01B has no picture, but there is sound, often the 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 with a successful hit of external light on the screen.
Replacing the LEDs requires disassembling the 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 panelsIf 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 the 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 turns out to be faulty, a software failure is also possible.
Then, first of all, it is necessary 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 normal limits, it is necessary to trace the passage of LVDS signals from the MainBoard 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.
If there is no tuning for terrestrial or cable TV channels, you should make sure that the software is correct, as well as that the supply voltages on the Tuner outputs are consistent. It is also necessary to check with an oscilloscope the presence of pulses of data exchange between the tuner and the processor via the I2C bus.
Attention! Users and owners of T32ED07U-01B TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from trying to repair themselves in order to avoid negative consequences that can lead to the complete non-repairability of the device.
One of the typical THOMSON T32ED07U-01B malfunctions often occurs in the LC320DXE (SF) (R1) LED panel from LG.
External manifestations: no image, display backlight does not work. In most such cases, the LEDs are faulty, which, when checked, turn out to be either open-circuit or with broken internal zener diodes.
The LEDs need to be replaced, and the maximum current from the driver is limited to 10-20%.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> THOMSON T32ED07U-01B, Main: TP.VST59.P8B, Panel: LC320DXE (SF)(R1)
The appearance of MainBoard TP.VST59.P8B is shown in the figure below:TP.VST59.P8B
TP.VST59.P8B can be used in TVs:
FUSION FLTV-32K62 (Panel LC320DXJ (SF)(E1)), FUSION FLTV-28K62 (Panel ST2751A01-4), THOMSON T32ED07U-01B (Panel LC320DXE (SF)(R1) ).
The main features of the THOMSON T32ED07U-01B device:
Installed matrix (LED panel) LC320DXE (SF) (R1).
Matrix control uses Timing Controller (T-CON) 6870C-C442B ;.
To power the backlight LEDs, a converter combined with the TP.VST59.P8B main board is used, controlled by the LD5850GS PWM controller. The keys of the ME15N10 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 PWM SOT23-6 microcircuits and 7N65L power switches.
MainBoard - the main board (motherboard) is a TP.VST59.P8B module, using TSUMV59XE-Z1 microcircuits; SPI Flash: 25Q32, ATML 24C04 TPA3110LD2 and others.
Additional technical information about the panel:
Brand: LG Display
Model: LC320DXE-SFR1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 1%), Hard coating (3H)
Brightness: 300 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 68%
Response Time: 6 (G to G)
Frequency: 60Hz
Lamp Type: WLED Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
LED TV THOMSON T32ED07U-01B with LCD, diagonal size 49 "(124 cm) 16: 9 format. The declared brightness of the screen of 300 cd / m2 is provided by modern LED backlight LED. The ratio of maximum brightness to minimum (contrast) is not less 4000: 1 LCD panel uses Direct LED backlighting The design and technical capabilities of the TV allow viewing in high quality HD at a resolution of 1920x1080 pixels in graphics resolution in 1080p (Full HD). Supported media formats: MP3 , MPEG4, HEVC (H.265), Xvid, MKV, JPEG.
Speaker power of 10 W (2x5 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, audio x2, component, VGA, HDMI x3, USB x2. A headphone jack is provided. The digital tuner has the ability to receive television channels in the DVB-T MPEG4, DVB-C, DVB-T2, DVB-S2 standards.
Overall dimensions: 1106x701x274 mm.
TV weight: 10.7 kg.
Attention! The panel of the THOMSON T32ED07U-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.