Technical description and composition of the TV TCL 32E92NH22C, type of panel and applicable modules. The composition of the modules.TCL
Model: 32E92NH22C
Chassis / Version: MT35
Panel: LTA320AP02
T-CON: LTF320AP03 (LTF320A)
Inverter (backlight): SSI320-4UA01
PWM Inverter: STU432S
MOSFET Inverter: KMB054N40DB
Power Supply (PSU): 40-5PL37C-PWB1XG
PWM Power: L6563, L6599, Viper22
MainBoard: 40-EUMT35-MAF2XG
IC MainBoard: MT5335PU, MT8295AE, 25P32, 24C16, WT6702F
Tuner: TDQG4-601A 07-361AI5-TB1G
Specifications 32E92NH22C
TCL 32E92NH22C
General recommendations for repairing TV LCD
Possible malfunctions
- The TCL 32E92NH22C TV does not turn on, does not respond to the remote control and the control panel buttons, does not light up or blink indicators.
Most likely in this case, the main switching power supply (IIPS) 40-5PL37C-PWB1XG is faulty. Then we recommend that you measure its output voltages and, if they are absent, you should check the health of the power switches and rectifier diodes of the converters for a probable short circuit.
In case of breakdowns in the secondary circuits, the converter can operate in a short circuit mode, and during a short circuit in the elements of the primary circuit, the mains fuse usually breaks.
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) L6563, L6599, Viper22, 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 reacts to the remote control, channels are switched. In some cases, the image appears when you turn 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 the inverter.After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, you must ring in its converter power keys for breakdown and secondary windings of transformers for an open.
Sometimes, for diagnostic purposes, it is necessary to disable the inverter protection. In such cases, special care must be taken during work, and the protection circuits should be restored immediately after the repair is completed.
- The TV does not turn on, does not respond to the remote control. The indicator blinks or signals standby mode.
Repair or diagnostics of the 40-EUMT35-MAF2XG 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). Sometimes they require checking or replacing (if necessary) the elements of the MainBoard board - MT5335PU, MT8295AE, 25P32, 24C16, WT6702F. In cases where the BGA processor is used, its malfunction is usually detected by local heating.
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 TDQG4-601A 07-361AI5-TB1G. 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.
Once again, remind users! Attempts to independently repair the TCL 32E92NH22C TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard 40-EUMT35-MAF2XG is shown in the figure below:40-EUMT35-MAF2XG
The appearance of the power supply
Key Features of TCL 32E92NH22C:
Installed matrix (LCD-panel) LTA320AP02.
The matrix control uses the Timing Controller (T-CON) LTF320AP03.
To power the backlight, an SSI320-4UA01 inverter is used, it is controlled by the STU432S PWM controller. As power elements of the inverter, keys of the type KMB054N40DB are used.
The necessary supply voltages for all nodes of the TCL 32E92NH22C TV are generated by the 40-5PL37C-PWB1XG power supply module, or its analogs using L6563, L6599, Viper22 microcircuits.
MainBoard - the main board (motherboard) is a 40-EUMT35-MAF2XG module, using chips MT5335PU, MT8295AE, 25P32, 24C16, WT6702F and others.
The TDQG4-601A 07-361AI5-TB1G tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: SAMSUNG
Model: LTA320AP02
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: PVA, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare (Haze 7%), Hard coating (3H)
Brightness: 450 cd / m²
Contrast Ratio: 5000: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 4 pcs CCFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
TCL 32E92NH22C0 TV with a 32 "(81 cm) diagonal LCD display, 16: 9 format. The brightness of the screen declared by the manufacturer, 500 cd / m², is realized by backlighting with fluorescent lamps. Contrast - as the ratio of maximum brightness to minimum, is at least 1200: 1 Dynamic contrast ratio of 5000: 1 is provided by special control of the backlight depending on the lighting in the plot.You can view images in high quality HD at a resolution of 1366x768 pixels in the standard of graphic decomposition 720p (HD Ready). frequency or video signal can be processed in analogue systems PAL, SECAM, NTSC. Graphic processing and digital signal generation occurs in standards 480i, 480p, 576i, 576p, 720p, 1080i. Stereo sound is realized by two built-in speakers. 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), S-Video, RGB, VGA, HDMI x2. 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, 1280x1024, 1360x768.
Attention! The LCD TV panel of the TCL 32E92NH22C0 is its most expensive component.
Avoid hitting the glass and exerting pressure on the screen to avoid permanent damage to the LCD panel!