Technical description and composition of the THOMSON 26E62NH20 TV, panel type and modules used. The composition of the modules.THOMSON
Model: 26E62NH20
Chassis / Version: MT01
Panel: V260B1-L02
T-CON: 40-V260B1-TCB2XG; CM1671A-KQ, 24CO8
Inverter (backlight): integrated into PSU
Power Supply (PSU): B083-103 4H.B0830.021
MainBoard: 40-MT01TB-MAA2XG
IC MainBoard: MT8201-AE, TDA9886T, PS301A, 24C32MN, MT8293AE
Tuner: TEDE9-2C2B 07-389FI5-NB7G
Specifications 26E62NH20
THOMSON 26E62NH20
General recommendations for TV LCD repair
Possible manifestations of malfunctions
- TV THOMSON 26E62NH20 does not turn on and does not show any signs of turning on, does not respond to control buttons and to the remote control.
With similar manifestations, in some cases, the power module B083-103 is faulty. It is necessary to measure its output supply voltages, and if they are absent, check the serviceability of the power switches of the converters and rectifier diodes for the probability of breakdown in semiconductor PN junctions.
In case of breakdowns in the secondary circuits, the converter, as a rule, can operate in an emergency mode in a short circuit mode, and in the event of a short circuit in the power elements of the primary circuit, the mains fuse usually breaks off.
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. 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 properly.
- There is no picture, but there is sound, it reacts to the remote control. Or the image appears when turned on and immediately disappears
The defect can be caused by problems in the nodes or elements of the display backlight, or in the power supply of the lamps or the inverter.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protective circuits must be restored immediately after the repair is completed.
- The TV does not go into operation, does not respond to the remote control. The indicator on the front panel is on or blinking.
Repair or diagnostics of the ULB700043CMA0292 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 - MT8201AE, TDA9886T, PS301A, 24C32MN, MT8293AE. Defective components must be replaced.
The malfunction of the TEDE9-2C2B 07-389FI5-NB7G 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 monitored with an oscilloscope.
The lack of an image in the presence of a signal from THOMSON 26E62NH20 is often caused by a malfunction of the display backlight. Moreover, the problem can be both inside the LCD panel (matrix) V260B1-L02, for example, a malfunction of CCFL (EEFL) lamps, and outside in their power source - an inverter.
Without backlighting, sometimes you can see a barely noticeable image with a certain successful hit of external light on the screen.
Often, to repair the backlight, disassembly of the V260B1-L02 LCD panel is required - a painstaking process that requires special attention and accuracy from the master. In such cases, it is possible, with the slightest carelessness, to damage the glass or loops and the TV may become unrepairable.
We strongly do not recommend doing such work to owners of TVs and craftsmen who do not have experience in repairing LCD panels! Moreover, at home (at the owner's home).
If there is no image in the presence of backlight, the screen becomes slightly lighter when turned on, and if the TV is open, the light from the lamps can be seen through the holes in the panel case.
In this case, there may be a malfunction inside the panel, damage to strips, loops, the T-CON board (Timing Controller) may be defective. But often the main board MainBoard 40-MT01TB-MAA2XG also turns out to be faulty, a software failure is also possible.
In such cases, the master first of all needs to check the main supply voltage of the panel at the LVDS connector, the fuses on the T-CON board or the panel brackets, as well as the supply and reference voltages for line and column drivers - VGH, VGL, Vcom.
If all of the above measurements are within normal limits, then the oscilloscope should track the passage of LVDS signals from MainBoard 40-MT01TB-MAA2XG, as well as synchronizing signals from T-CON to loops with drivers.
Attention! Users and owners of 26E62NH20 TVs who do not have the appropriate qualifications, knowledge and experience are strongly discouraged from attempting to repair themselves in order to avoid negative consequences that can lead to complete non-repairability of the device.
DOWNLOAD FIRMWARE FOR SPI FLASH -----------> THOMSON 26E62NH20 MT01, Main: 40-MT01TB-MAA2XG, Panel: V260B1-L02
The appearance of the MainBoard 40-MT01TB-MAA2XG is shown in the figure below:40-MT01TB-MAA2XG
External view of the power supply
B083-103:
B083-103
The main features of the THOMSON 26E62NH20 device:
Installed matrix (LCD panel) V260B1-L02.
Matrix control uses Timing Controller (T-CON) 40-V260B1-TCB2XG ;.
A converter combined with a power supply is used to power the backlight lamps.
The formation of the necessary supply voltages for all nodes of the THOMSON 26E62NH20 TV is carried out by the B083-103 power module, or its analogs.
MainBoard - the main board (motherboard) is a 40-MT01TB-MAA2XG module using MT8201-AE, TDA9886T, PS301A, 24C32MN, MT8293AE and others.
Tuner TEDE9-2C2B 07-389FI5-NB7G provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: CMO
Model: V260B1-L02
Type: a-Si TFT-LCD, Panel
Diagonal size: 26.0 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 575.769x323.712 mm
Brightness: 450 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 72%
Response Time: 3/5 (Tr / Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: RSDS (1 Channel), 45 pins
Voltage: 5.3.3 / 5.0V (VDD / VIN5)
LCD TV THOMSON 26E62NH20 with LCD V260B1-L02, 26 "(66 cm) diagonal 16: 9. Screen brightness of 500 cd / m² provided by CCFL (EEFL) backlighting. Dynamic contrast ratio of 5000: 1 is achieved by special control of operation illumination depending on the brightness of the scene. It is possible to view in high quality HD at a resolution of 1366x768 pixels in the standard 720p (HD Ready). Input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC. Digital signal formation (graphic format) is made in 480i standards , 480p, 576i, 576p, 720p, 1080i.
Speaker power 16 W (2x8 W) is provided by two speakers. The NICAM STEREO audio processing system is used.
External interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, audio x2, S-Video, RGB, HDMI. A headphone jack is provided. A standard VGA (D-Sub 15) connector is used to connect a laptop or computer. This interface supports resolutions: 640x480, 800x600, 1024x768, 1360x768.
Attention! The V260B1-L02 panel of the THOMSON 26E62NH20 LCD TV is the most expensive component.
Avoid hitting the glass and putting pressure on the screen surface to avoid irreversible damage to the LCD panel!
