Technical description and composition of the TV TCL 22B12H, type of panel and applicable modules. The composition of the modules.TCL
Model: 22B12H
Chassis / Version: 40-LD5335-MAD2XG
Panel: CLAA216WA01
Lamp backlight: 4 Lamp CCFL
T-CON: 216WA01S (not removable)
Inverter (backlight): 40-3PL22C-PWI1XG
Power Supply (PSU): 40-3PL22C-PWI1XG // 08-IPL22C0-PW200AA
MainBoard: 40-LD5335-MAD2XG
IC MainBoard: MT5133AN TDA9886TS WT6702F TDA7266
Tuner: TDQG8-610A 9D11DQ3G
Control: RC1994301 -?
Specifications 22B12H
TCL 22B12H
General recommendations for repairing TV LCD
Possible manifestations of defects
- The TCL 22B12H does not turn on at all. There is no reaction to the remote control and control buttons from the front panel. Indicator lights do not light or flash.
In such cases, the fault should be sought first in the 40-3PL22C-PWI1XG power supply module. It is necessary to measure its output voltages, and in case of their absence (full or partial), it is necessary to check the serviceability of the power switches of the converters and rectifier diodes for the presence of a possible short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during short circuit in the elements of the primary circuit, the mains fuse usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits are usually checked by replacement with new ones, or obviously working.
- There is no image, there is sound, it responds to the remote control. Or the image may appear for a second when turned on and immediately disappears.
The defect can be caused by problems in the nodes or elements of the backlight of the display, or in the power supply of the lamps or inverter. If all the electrolytic capacitors of the filter according to the power supply of the inverter are working, make sure that the lamps are working, then you need to check the converter keys and the secondary windings of the transformers.
If in diagnosing a malfunction, it is necessary to disable 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 finished, it is necessary to restore the protection circuits for further safe operation of the TV by the owner in normal mode.
- The indicator on the front panel blinks, the TV does not turn on in the operating mode, it does not respond to the remote control.
Repair or diagnostics of the 40-LD5335-MAD2XG motherboard should begin by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, update or replace the software (software). Often, the MB (SSB) card must be replaced in case of complex malfunctions that are difficult to detect. When trying to repair, you should check its elements - MT5133AN TDA9886TS WT6702F TDA7266 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
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 TDQG8-610A 9D11DQ3G tuner. 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.
TV users and owners must remember that attempts to self-repair a TCL 22B12H TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
FIRMWARE FOR SPI FLASH -----------> TCL 22B12H, Main: 40-LD5335-MAD2XG, Panel: CLAA216WA01
The appearance of the MainBoard 40-LD5335-MAD2XG is shown in the figure below:
40-LD5335-MAD2XG
Main features of the TCL 22B12H device:
Installed matrix (LCD panel) CLAA216WA01.
The matrix control uses the Timing Controller (T-CON) 216WA01S.
To power the backlight used inverter 40-3PL22C-PWI1XG.
The formation of the necessary supply voltages for all nodes of the TCL 22B12H TV is carried out by the power supply module 40-3PL22C-PWI1XG, or its analogues.
MainBoard - the main board (motherboard) is a 40-LD5335-MAD2XG module, using MT5133AN TDA9886TS WT6702F TDA7266 chips and others.
The TDQG8-610A 9D11DQ3G tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: CPT
Model: CLAA216WA01
Type: a-Si TFT-LCD, Panel
Diagonal size: 21.6 inch
Resolution: 1366x768, WXGA
Display Mode: TN, Normally White, Transmissive
Active Area: 477.417x268.416 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 350 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (6-bit + Hi-FRC), CIE1931 72%
Response Time: 5 (Tr + Td)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 5.0V
TCL 22B12H TV with CLAA216WA01 LCD, diagonal size 22 "(56 cm) in 16: 9 format. The brightness of the screen declared by the manufacturer, 350 cd / m², is realized by backlighting with fluorescent lamps. Dynamic contrast ratio 10000: 1 is provided by special control of the backlight in depending on the lighting in the plot. You can view images in high quality HD at a resolution of 1366x768 pixels in the standard for graphic decomposition 720p (HD Ready). The input high-frequency or video signal can be processed in analog systems PAL, SECAM, NTSC. Digital signal processing and generation takes place in the standards 480i, 480p, 576i, 576p, 720p, 1080i Supported media file formats: MP3, JPEG.
The power of the sound system 6 W (2x3 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), AV, audio x2, S-Video, component, SCART, VGA, HDMI x2, USB. An output for connecting headphones is provided. To connect a computer or laptop to this TV model, a VGA (D-Sub 15) connector is used on the TV case, this interface supports resolutions: 640x480, 800x600, 1024x768.
A digital tuner is capable of receiving television channels in DVB-T standards.
The power consumed by the TV in the operating mode from the network is 45 watts.
Overall dimensions: with stand 538x408x179 mm, without stand 538x379x64 mm.
TV Weight: with stand: 6.8 kg, without stand: 4.6 kg.
Attention! The CLAA216WA01 LCD panel of the TCL 22B12H LCD TV is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!
