Technical description and composition of the LG 32LG3200 TV, panel type and applicable modules. The composition of the modules.LG
Model: 32LG3200
Chassis / Version: LD84A
Panel: LC320WXN (SA) (A2)
Inverter (backlight): 6632L-0494A
PWM Inverter: BD9897FS
Power Supply (PSU): EAY4050440 LGP32-08H EAX40097901 / 15
PWM Power: SG6961 (PFC), NCP1396AD, NCP1207AD
MainBoard: EAX56818401 (0) EBR48904608 EBR54743301
IC MainBoard: LGE7363C-LF, HY5DU561622FTP-4, 25L3205DM2I, NTP-3000A, MAX3232C
Tuner: EBL42367001 TDFV-G135D
Control: IR: EAX44059405 (0)
Specifications 52LG5030
LG 32LG3200
General recommendations for repairing TV LCD
Possible manifestations of defects
- The LG 32LG3200 TV does not turn on and does not show any signs of operability at all. There is no reaction to the remote control and the control buttons from the front panel.
With such manifestations, a defect can be caused by faulty elements in the EAY4050440 main power module. Then it is necessary to measure its secondary (output) voltages and, if they are absent, it is necessary to check the serviceability of power switches and rectifier diodes of all converters for a possible short circuit.
In case of diode breakdowns in the secondary circuits, the converter can operate in emergency short-circuit mode without output voltages, and during short circuit in the power elements of the primary circuit, the mains fuse and / or current sensor at the source of the key usually breaks.
The breakdown of Mos-Fet keys used in pulsed sources is often caused by malfunctions of other elements, for example, power, frequency-setting, damper ... as well as elements of the Negative Stabilization Feedback.
PWM circuits SG6961 (PFC), NCP1396AD, NCP1207AD can also cause malfunction of power switches of the converters and are 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.
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 the 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 EAX56818401 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 cases of complex repairs of MB (SSB) and in the presence of the necessary skills and equipment, sometimes it may be necessary to replace its chips LGE7363C-LF, HY5DU561622FTP-4, 25L3205DM2I, NTP-3000A, MAX3232C and other possible faulty components. Malfunctions associated with the application of BGA soldering technologies are usually easily diagnosed by the heating method.
If the TV works normally from external devices, but does not tune into television channels, the tuner EBL42367001 TDFV-G135D 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.
Owners and users of the LG 32LG3200 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!
Service manual and schematic diagram -------------------------------> LG 32LG3200 Chassis LD84A.
MODEL : 32LG2000, 32LG2000-ZA, 32LG3200, 32LG3200-ZA
The appearance of the MainBoard EAX56818401 is shown in the figure below:EAX56818401
EAX56818401 can be used in TVs:
LG 26LG3050-ZA (Panel V260B1-L03), LG 32LG3000 (Panel LK315T3LZ94), LG 32LG3200 (Panel LC320WXN (SA)(A2)).
The appearance of the power supply
Main features of the device LG 32LG3200:
Installed matrix (LCD panel) LC320WXN (SA) (A2).
To power the backlight, an inverter 6632L-0494A is used, it is controlled by the BD9897FS PWM controller.
The necessary supply voltages for all nodes of the LG 32LG3200 TV are generated by the EAY4050440 power module or its analogs using SG6961 (PFC), NCP1396AD, NCP1207AD microcircuits.
MainBoard - the main board (motherboard) is an EAX56818401 module, using LGE7363C-LF, HY5DU561622FTP-4, 25L3205DM2I, NTP-3000A, MAX3232C, and others microcircuits.
The tuner EBL42367001 TDFV-G135D provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320WXN-SAA2
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
Contrast Ratio: 1100: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: EEFL
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V