Technical description and composition of the HAIER LT32M1C TV, panel type and applicable modules. The composition of the modules.Haier
Model: LT32M1C
Chassis / Version: 715G3693
Panel: LC320WXE (SB) (C1)
T-CON: LC320WXN-SBA1; TL-2417MC BUF08821
Inverter (backlight): integrated into PSU
Power Supply (PSU): 715G3234-P01-H30-003M
PWM Power: A6960H, FAN7602, FAN7529
MOSFET Power: P10NK70ZPF
MainBoard: 715G3693-MOC-000-004K
IC MainBoard: MT8292N, 25L4005, HY27US08281A, 24C32WP (24C02WP), TDA8933B5BTW
Tuner: FQD1116ME / BH-TPV
Appearance
HAIER LT32M1C
General recommendations for repairing TV LCD
Possible manifestations of defects
- Haier LT32M1C does not turn on and does not show any signs of operability. Does not blink indicators and does not respond to any control buttons.
With such manifestations, the 715G3234-P01-H30-003M power module usually fails. It is necessary to measure the secondary output voltage, and in case of their absence, check the serviceability of the power switches (P10NK70ZPF) of the converters and rectifier diodes for a 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, power supply, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback. PWM chip A6960H, FAN7602, FAN7529 can also cause a malfunction of the power switch of the converter and is checked by replacement.
- 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.
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, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the 715G3693-MOC-000-004K motherboard should begin by checking the stabilizers and power converters needed to power the microcircuit and matrix. If necessary, update or replace the software (software). In some cases, to repair the MB board (SSB), it may be necessary to replace the chips - MT8292N, 25L4005, HY27US08281A, 24C32WP (24C02WP), TDA8933B5BTW with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
If the TV works normally from external devices but does not tune into television channels, the FQD1116ME / BH-TPV tuner may be malfunctioning. In such cases, first of all, you should make sure that there are supply voltages at its corresponding conclusions. It is also necessary to make sure that the tuner and processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner may be a software failure.
Once again, remind users! Attempts to self-repair a Haier LT32M1C TV without the appropriate qualifications and the necessary experience can lead to its complete non-repairability!
The appearance of the MainBoard 715G3693-MOC-000-004K is shown in the figure below:715G3693-MOC-000-004K
Key Features of HAIER LT32M1C:
Installed matrix (LCD panel) LC320WXE (SB) (C1).
The matrix control uses the Timing Controller (T-CON) LC320WXN-SBA1 ;.
To power the backlight, a converter is used, combined with a power supply.
The necessary supply voltages for all nodes of the TV HAIER LT32M1C are formed by the power module 715G3234-P01-H30-003M, or its analogs using microchips A6960H, FAN7602, FAN7529 and power switches of the type P10NK70ZPF.
MainBoard - the main board (motherboard) is a 715G3693-MOC-000-004K module, using the chips MT8292N, 25L4005, HY27US08281A, 24C32WP (24C02WP), TDA8933B5BTW and others.
The FQD1116ME / BH-TPV tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG Display
Model: LC320WXE-SBC1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.685x392.256 mm
Surface: Antiglare (Haze 11%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1200: 1
Display Colors: 16.7M (8-bit)
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs EEFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
