Technical description and composition of the LG 32LG5300 TV, panel type and applicable modules. The composition of the modules.LG
Model: 32LG5300
Chassis / Version: LG5300
Panel: LC320WXN (SA) (A1)
Lamp backlight: 12 LAMP EEFL
T-CON: 6870C-0195A (SA) (A1) LC320WXN-SAA1
Inverter (backlight): 6632L-0494A 2300KTG006A-F LGIT PNEL-T712A REV-1.3
Power Supply (PSU): EAY4050440 LGP32-08H EAX40097901 / 14
PWM Power: SG6961 (PFC), NCP1396AD, NCP1207AD
MainBoard: LG5300 MAIN B / D REV1.0 01004-00038
IC MainBoard: MICRONAS VCT8378P, KSS169 / 00, CI2000PB, 24LC64T
Tuner: DN0Q303NH261A
Control: IR: EAX43438801
Specifications 52LG5030
LG 32LG5300
General recommendations for repairing TV LCD
Possible malfunctions
- The LG 32LG5300 TV does not turn on at all. The control lights do not light or flash. The TV on the remote control and the control panel buttons do not respond.
With such manifestations, the EAX40097901 power supply module usually fails. It is necessary to measure its output voltages and, in case of their absence, check the serviceability of power switches and rectifier diodes in the converters for possible breakdown.
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, in the power supply circuit of a PWM controller, in frequency-setting or damping circuits, as well as in Negative Stabilization Feedback. PWM microcircuits SG6961 (PFC), NCP1396AD, NCP1207AD are usually checked by replacing with new, or obviously working.
- There is no image, there is sound, it reacts to the remote control, channels are switched. In some cases, the image appears when you turn 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, the indicator indicates standby or operating mode, or blinks.
Repair or diagnostics of the LG5300 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). Often, the MB (SSB) card needs to be replaced in case of complex faults that are difficult to detect. When trying to repair, you should check its elements - MICRONAS VCT8378P, KSS169 / 00 and replace failed chips with new ones. Some malfunctions may be due to the use of BGA soldering technologies in modern Main Board technologies. Typically, such defects are detected by local heating of the chip.
Before changing the tuner DN0Q303NH261A, if it is not possible to tune to television channels, you should make sure that there are supply voltages that must be measured at the corresponding terminals of the tuner and check the software for correctness. The pulses of the data exchange of the tuner with the processor can be controlled by an oscilloscope
TV users and owners need to remember that attempts to self-repair a LG 32LG5300 TV without the appropriate qualifications and necessary experience can lead to serious negative consequences.................
Service manual and schematic diagram LG 32LG5300 YEAR 2008.
The appearance of the MainBoard LG5300 is shown in the figure below:LG5300
The appearance of the power supply
Main features of the device LG 32LG5300:
Installed matrix (LCD panel) LC320WXN (SA) (A1).
The matrix control uses the Timing Controller (T-CON) 6870C-0195A.
An inverter 6632L-0494A is used to power the backlight.
The necessary supply voltages for all nodes of the LG 32LG5300 TV are generated by the EAY4050440 power module or its analogs using SG6961 (PFC), NCP1396AD, NCP1207AD microcircuits.
MainBoard - the main board (motherboard) is an LG5300 module using MICRONAS VCT8378P, KSS169 / 00, CI2000PB, 24LC64T, and others.
The tuner DN0Q303NH261A provides the reception of television programs and tuning to channels.
Additional technical information about the panel:
Brand: LG.Philips LCD
Model: LC320WXN-SAA1
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: 1100: 1
Display Colors: 16.7M (8-bit), CIE1931 72%
Response Time: 8 (G to G)
Frequency: 60Hz
Lamp Type: 12 pcs EEFL Embedded (Inverter)
Signal Interface: LVDS (1 ch, 8-bit), 30 pins
Voltage: 12.0V
