Technical description and composition of the THOMSON 15XA2000 TV, panel type and modules used. The composition of the modules.THOMSON
Model: 15XA2000
Panel: HT150X02-100
Inverter (backlight): SH15-0211 - 2Lamp
Power Supply (PSU): Adapter 12V
MainBoard: T8-AXA1NMS-MA2 4A-LCD15T-BE1
IC MainBoard: TDA9886TS, TDA1517P, MT8200ALE, S29AL016D70TF102, W9864G6IH-5
Tuner: TEDE-2C2B
Control: RC1994301
Specifications 15XA2000
THOMSON 15XA2000
General recommendations for TV LCD repair
Possible manifestations of defects
- The THOMSON 15XA2000 TV does not turn on and does not show any signs of operability at all. No response to the remote control and front panel control buttons.
Usually with such manifestations, the defect is caused by faulty elements in the main power supply module Adapter.
The owner of the TV set can purchase an external power supply of type Adapter on his own and its repair is not always expedient. In any case, the simplest typical defects typical for most SMPS circuits can be easily detected and eliminated after opening. 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 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 at the source of the key often breaks 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 a PWM controller, damper or frequency setting circuits, or OOS (negative feedback) elements in the stabilization circuit. PWM controllers (PWM), 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 image, there is sound, it reacts to the remote control, the channels are switched. In some cases, the image appears when turned on and disappears immediately.
A defect can be caused by problems in the nodes or elements of the display backlight, or in the power supply of lamps or the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, ring the power switches in its converter for breakdown and the secondary windings of the transformers for an open circuit.
If, when diagnosing a malfunction, it is required to turn off the inverter protection, there is a risk of failure of the power elements of the inverter, and special care is required during work, and after they are completed, it is imperative to restore the protection circuits for the further safe operation of the TV by the owner in normal mode.
- The indicator blinks or is on constantly, the TV does not turn on, does not respond to the remote control.
Repair or diagnostics of the T8-AXA1NMS-MA2 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). Sometimes it is necessary to check or replace (if necessary) elements of the MainBoard - TDA9886TS, TDA1517P, MT8200ALE, S29AL016D70TF102, W9864G6IH-5. In cases where a BGA processor is used, its malfunction is usually detected by the local warm-up method.
The malfunction of the TEDE-2C2B 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 THOMSON 15XA2000 has no display when a signal is present, and is often caused by a malfunctioning display backlight. Moreover, the problem can be both inside the LCD panel (matrix) HT150X02-100, 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 HT150X02-100 LCD panel is required - a painstaking process that requires increased attention and accuracy from the master. In such cases, there is a possibility, with the slightest negligence, 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 T8-AXA1NMS-MA2 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 the normal range, then the oscilloscope needs to track the passage of LVDS signals from the MainBoard T8-AXA1NMS-MA2, as well as synchronizing signals from T-CON to loops with drivers.
Owners and users of the THOMSON 15XA2000 TV should remember that self-repair without special knowledge, skills and qualifications may be fraught with negative consequences that can lead to complete non-repairability of the device!
The main features of the THOMSON 15XA2000 device:
Installed matrix (LCD panel) HT150X02-100.
The SH15-0211 inverter is used to power the backlight lamps.
To power all the internal components of the THOMSON 15XA2000 TV, an external adapter type 12V is used.
MainBoard - the main board (motherboard) is a T8-AXA1NMS-MA2 module, using TDA9886TS, TDA1517P, MT8200ALE, S29AL016D70TF102, W9864G6IH-5 and others.
The TEDE-2C2B tuner provides reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: BOE
Model: HT150X02-100
Type: a-Si TFT-LCD, Panel
Diagonal size: 15.0 inch
Resolution: 1024x768, XGA
Display Mode: TN, Normally White, Transmissive
Active Area: 304.128x228.096 mm
Surface: Antiglare (Haze 25%), Hard coating (3H)
Brightness: 250 cd / m²
Contrast Ratio: 500: 1
Display Colors: 16.2M (6-bit + FRC), CIE1931 60%
Response Time: 2/6 (Tr / Td)
Frequency: 60Hz
Lamp Type: 2 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 20 pins
Voltage: 3.3VLCD-TV
THOMSON 15XA2000 with LCD display HT150X02-100, diagonal size 15 "(38 cm) format 4: 3. Screen brightness 250 cd / m² provided by CCFL (EEFL) lamps. Contrast - ratio of maximum brightness to the minimum is at least 400: 1. The input high-frequency or video signal is decoded in analog systems PAL, SECAM, NTSC The digital signal (graphic format) is formed in the standards 480i, 480p, 576i, 576p.
The power of the sound system is 6 W (2x3 W), provided by two speakers. The NICAM STEREO audio processing system is used.
The external interface (communication with other devices) is supported by standard input and output connectors: antenna input (RF), AV, S-Video, component, SCART, RGB, VGA. A standard VGA (D-Sub 15) connector is used to connect a laptop or computer. This interface supports resolutions: 640x480, 800x600, 1024x768.
Attention! The HT150X02-100 panel of a THOMSON 15XA2000 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!
