Technical description and composition of the HAIER L32A9A TV, type of panel and applicable modules. The composition of the modules.Haier
Model: L32A9A L32A9A-A1
Chassis / Version: PY12038-Q
Panel: LC320WX3 (SL) (C1)
T-CON: LC320WX3-SLC1 P / N: 6870C-0154C; LCDP4801A, M12L16161A-AZH1P71H2, TPS65161
Inverter (backlight): KLS-EE32HK14A
PWM Inverter: OZ9666SN
MOSFET Inverter: K4075
Power Supply (PSU): PSM210-417-R / PSM210-417A-R
PWM Power: L6562, NCP1377B, WT7515
MOSFET Power: P9NK70Z, P10NK80Z
MainBoard: PY12038-Q (V1.0)
IC MainBoard: HY5DU281622FTP-5
Tuner: TDQ-6PD / T125D-ADC
Control: HTR-192
Appearance
HAIER L32A9A
General recommendations for repairing TV LCD
Possible manifestations of defects
- Haier L32A9A TV does not turn on. The control lights do not light or flash. On the remote control and other control buttons does not respond.
With such manifestations, a malfunction is likely to be detected in the PSM210-417-R power supply module. It is necessary to measure the secondary output voltage, and in case of their absence, check the operability of the power switches (P9NK70Z, P10NK80Z) 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.
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. It can be supply, damper circuits, or elements of OOS (negative feedback) stabilization. The reason for the breakdown of the power switch may be PWM (PWM) L6562, NCP1377B, WT7515. It is checked only by replacement with a known good one.
- There is no image, there is sound, it responds to the remote control, the 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 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 TV does not enter the operating mode, does not respond to the remote control. The indicator on the front panel lights constantly or blinks.
Repair or diagnostics of the PY12038-Q 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). Sophisticated MB board repair (SSB) is in some cases possible and practiced by repairmen. To do this, check and, if necessary, replace the elements HY5DU281622FTP-5. BGA chip malfunctions are usually easy to detect by warming up.
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 voltages on the terminals of the TDQ-6PD / T125D-ADC 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.
Owners and users of the Haier L32A9A TV should remember that self-repair without special knowledge, skills and qualifications can be fraught with negative consequences that can lead to complete non-repairability of the device!
The appearance of the MainBoard PY12038-Q is shown in the figure below:PY12038-Q
The appearance of the power supply
Key Features of HAIER L32A9A:
Installed matrix (LCD panel) LC320WX3 (SL) (C1).
The matrix control uses the Timing Controller (T-CON) LC320WX3-SLC1.
To power the backlight, an inverter KLS-EE32HK14A is used, it is controlled by the PWM controller OZ9666SN. As power elements of the inverter, keys of the K4075 type are used.
The necessary supply voltages for all nodes of the HAIER L32A9A TV are generated by the PSM210-417-R power supply module or its analogs using L6562, NCP1377B, WT7515 microchips and power switches of the type P9NK70Z, P10NK80Z.
MainBoard - the main board (motherboard) is a PY12038-Q module, using HY5DU281622FTP-5 microcircuits and others.
The TDQ-6PD / T125D-ADC tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320WX3-SLC1
Type: a-Si TFT-LCD, Panel
Diagonal size: 31.5 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 697.68x392.26 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 400 cd / m²
Contrast Ratio: 900: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 14 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V