Technical description and composition of the LG 32LC43-ZE TV, panel type and applicable modules. The composition of the modules.LG
Model: 32LC43-ZE
Chassis / Version: LP78A
Panel: LC320WX6 SL A3
Inverter (backlight): integrated into PSU
PWM Inverter: OZ9925GN
Power Supply (PSU): LGLP32SLP - EAY36768101
PWM Power: ICE3B1565J (Standby), 6501A, FAN7382
MainBoard: EAX32572506 (0)
IC MainBoard: ANX9021, TPA3107D2, STMAV340, VCT7993P, AMTEL7044C32AN, TEA6420, MP2355DN
Tuner: TAFT-W005D
Specifications 32LC43
LG 32LC43-ZE
General recommendations for repairing TV LCD
It is advisable to start repairing an LG TV with an LP78A chassis with a careful external inspection of both internal and external elements. Often, by the external signs and nature of the damage to the elements, it becomes possible to draw some conclusions and determine a further algorithm for finding a defect before making the necessary measurements at control points. Swollen electrolytic or cermet capacitors, charred resistors, ring cracks in the soldered terminals of the elements - all this can significantly help the master to determine the causes and consequences of the malfunction of the TV.
If the LG 32LC43-ZE does not turn on, no control lights on the front panel light up or blink, therefore, there is a very high probability of a malfunction of the LGLP32LPV2 power module. In some cases, only the processor power regulator may be faulty. When diagnosing and repairing the power supply, after replacing the swollen capacitors of the filters of the secondary rectifiers (if any), you must first check the mains fuse. When it is broken, the power elements of transistors and rectifier bridge diodes should be checked for avalanche (thermal) breakdown.
Power switches in pulsed power supplies (SMPS) fail extremely rarely for no reason and, if they are broken, it is necessary to look for a malfunction in the stabilization circuits by checking electrolytic capacitors, semiconductor devices, and resistors in the primary circuit. The reason may be a malfunction of the PWM controller ICE3B1565J dezh 6501A pre-condition OZ9925GN 7382 invertor, 0001 main power supply units, which can only be checked by replacing it with a new or obviously working one.
If, when you turn on the TV, the image appears and immediately disappears, or is initially absent when you turn on, but there is sound and other functions work, there is a high probability of a malfunction of the inverter (power converter for the backlight). In such cases, the lamps, the inverter and the common power module are subject to verification, in which the electrolytic capacitors of the rectifier filter supplying the inverter should be checked. When disabling protection in order to enable the diagnosis of a malfunction, special care should be taken, and after completion of all repair work, it is necessary to restore the circuit and the inverter protection for further safe operation of the TV.
In the event of a malfunction, on the motherboard, first of all, check the operability of all stabilizers or power converters of the microcircuits and, if necessary, update the software (software).
Attention! For users and owners of 32LC43-ZE TVs who do not have the appropriate qualifications, knowledge and experience, we strongly recommend against self-repair attempts in order to avoid negative consequences that could lead to complete non-repairability of the device.
Service manual and schematic diagram ----------> LG 32LC41/4R 32LC41/4R-ZA, 32LC42 32LC42-ZC, 32LC43 32LC43-ZA/ZE, 32LC44 32LC43-ZB Chassis LP78A
The appearance of the MainBoard EAX32572506 is shown in the figure below:
EAX32572506
EAX32572506 can be used in TVs:
LG 32LC43-ZE (Panel LC320WX6 SL A3), LG 32LC7RC TA (Panel LC320WX6 (SL)(A3)), LG 32LC41 (Panel LC320WX4 (SL)(D2)), LG 37LC41 ZA (Panel LC370WX4-SLA1).
Main features of the device LG 32LC43-ZE:
Installed matrix (LCD-panel) LC320WX6 SL A3.
To power the backlight, a converter is used, combined with a power supply, controlled by the OZ9925GN PWM controller.
The necessary supply voltages for all nodes of the LG 32LC43-ZE TV are generated by the LGLP32SLP power module or its analogs using ICE3B1565J (Standby), 6501A, FAN7382 microcircuits.
MainBoard - the main board (motherboard) is an EAX32572506 module, using ANX9021, TPA3107D2, STMAV340, VCT7993P, AMTEL7044C32AN, TEA6420, MP2355DN, and others microcircuits.
The TAFT-W005D tuner provides TV reception and channel tuning.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320WX6-SLA3
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 (Haze 13%), Hard coating (3H)
Brightness: 500 cd / m²
Contrast Ratio: 1000: 1
Display Colors: 16.7M (8-bit)
Response Time: 8/10 (Tr / Td)
Frequency: 60Hz
Lamp Type: 14 pcs EEFL Without Driver
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V