LG RZ-30LZ13, Service Manual

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Symptom Cause Check Point
1) Check the Power switch assy.
2) Check the Power board.
3) If you don’t turn on the Power in stand-by status,
error is the short of Main Board or Tuner Board. Check
the Board.
1) Check the Power part ~ inverter connection cable.
2) Check the inverter on signal.
3) Inverter Error
1) Check the status of Main Board and LCD module
cable.
1) Check the status of Main Board ~Speaker Board
connection cable.
2) Check the TV ~ SPEAKER connection cable.
3) Check the Main Board ~ Tuner Board connection
cable.
1) Check the IC1107/IC1107 error.
2) If IC has speaker-output above 20W , shut down by
itself.
=> Power OFF/ON- Nomal operation
Power supply Error
Inverter power on error
LVDS cable error
Speaker cable error
Sound AMP IC error
1. No picture, No sound
2. No picture, Sound ok
3. Picture ok, No sound
TROUBLESHOOTING
Symptom Cause Check Point
1) Check the PC resolution and support resolution on
spec.
2) Adjust clock and phase of OSD menu.
1)Operation of auto configure on Menu.
1) Check the status of P201 wax-soldering.
2) Check the status of IC201 wax-soldering.
Clock, phase error
Screen position error
D-sub Jack soldering error,IC
1. Screen Noise
2. Screen Position Error
3.Color Beat
Symptom Cause Check Point
1) Check the status of speaker.
2) Check connection of the Main board ~ Tuner board.
3) Check connection of the Main board ~ SPK board.
4) Check IC1102, IC1107, IC1108.
1) Check the status of LVDS cable.
2) Check the wax-soldering status of IC.
IC1102, IC1107, IC1108 error
LVDS cable error
Check IC401, IC501
1. No sound
-Speaker
2. Video color beat noise
1. General features
2. PC mode
3. TV & External input