Technical description and composition of the HAIER L37A9A TV, panel type and applicable modules. The composition of the modules.Haier
Model: L37A9A L37A9A-AK
Chassis / Version: PY12026-Q
Panel: LC370WX1 (SL) (02)
T-CON: LC370WX1 / LC320W01 P / N: 6870C-0060F 2Layers; TL22710D
Inverter (backlight): MASTER 6632L-0199B, SLAVE 6632L-0200B
PWM Inverter: OZ9936I
Power Supply (PSU): AD301M24-4N1 A404CV8.1A
PWM Power: TNY266P
MainBoard: PY12026-Q (V2.1) PX4R433-Q P / N: 0-3298-009006-01
IC MainBoard: MST6151DA-LF, IS42S32200C1-6TL, LM2596S, LV1116N, TDA1554Q
Tuner: JS-6H1 / 111A25HR
Appearance
HAIER L37A9A
General recommendations for repairing TV LCD
Possible malfunctions
- The Haier L37A9A TV does not turn on, does not respond to the remote control and the control panel buttons, the indicators do not light or flash.
In the vast majority of such cases, a malfunction is detected in the AD301M24-4N1 power supply module. It is necessary to measure the secondary output voltage, and in case of their absence, check the serviceability of the power switches 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) TNY266P. It is checked only by replacement with a known good one.
- There is no image, but there is sound and reaction to the remote control. Or for a second, the image may appear immediately after switching on.
These manifestations can be triggered by a power module, or by defects in the inverter, as well as a distortion of the currents in the lamps due to their uneven wear. After checking all the electrolytic capacitors of the filters that are involved in the power supply of the inverter, it is necessary to ring in its converter the power switches for breakdown and the 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 PY12026-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). In some cases, to repair the MB (SSB) board, it may be necessary to replace the chips - MST6151DA-LF, IS42S32200C1-6TL, LM2596S, LV1116N, TDA1554Q with new or obviously working ones. In cases where BGA technologies are used, defects are usually localized by the heating method.
The malfunction of the JS-6H1 / 111A25HR 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 controlled by an oscilloscope.
TV users and owners must remember that attempts to self-repair a Haier L37A9A TV without the appropriate qualifications and necessary experience can lead to serious negative consequences!
INVERTER: LC370WX1 MASTER 6632L-0199B ITW-EE37-M (S) Rev1.1
INVERTER: LC370WX1 SLAVE 6632L-0200B ITW-EE37-S (S) Rev1.1
The appearance of the MainBoard PY12026-Q is shown in the figure below:PY12026-Q
PY12026-Q can be used in TVs:
Haier L32A8A (Panel T315XW01 V.5), Haier L37A9A L37A9A-AK (Panel LC370WX1 (SL)(02)).
The appearance of the power supply
Main features of the HAIER L37A9A device:
Installed matrix (LCD panel) LC370WX1 (SL) (02).
The matrix control uses the Timing Controller (T-CON) LC370WX1.
A MASTER inverter is used to power the backlight, controlled by the OZ9936I PWM controller.
The necessary supply voltages for all nodes of the TV HAIER L37A9A are formed by the AD301M24-4N1 power module, or its analogs using TNY266P microcircuits.
MainBoard - the main board (motherboard) is a PY12026-Q module, using microchips MST6151DA-LF, IS42S32200C1-6TL, LM2596S, LV1116N, TDA1554Q and others.
The JS-6H1 / 111A25HR tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC370WX1-SL02
Type: a-Si TFT-LCD, Panel
Diagonal size: 37 inch
Resolution: 1366x768, WXGA
Display Mode: S-IPS, Normally Black, Transmissive
Active Area: 819.6x460.8 mm
Surface: Antiglare, Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 800: 1
Display Colors: 16.7M (8-bit)
Response Time: 9.0 (G to G)
Frequency: 60Hz
Lamp Type: 20 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V