LG AB-H1208VA0, Руководство по обслуживанию

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Electronic parts Troubleshooting Guide
YES
NO
YES
NO
NO
Is the connection between
MAIN PCB and remote-controller
correct?
Is there Check(F**) on
the remote controller LCD?
1. Check or repair Connector wiring.
2. Exchange the Connector.
Is the input power voltage of
remote-controller DC12V?
Do Keys have troubles?
Exchange remote-controller.
Exchange remote-controller.
NO
YES 1. Replace the pressed key.
2. Exchange the Knob or Key.
YES
NO
1. Remove cause of Check.
2. Reenergize the power supply.
YES
YES
Is there OSC vibration on
the remote-controller PCB?
NO
1. Check or exchange IC01D
(7812) on the MAIN PCB.
1. Exchange OSC
2. Check the pattern around OSC
on the remote-controller PCB.
Is any key on the remote-controller
keeping pressed?
1. Check Keys.
2. Repair or exchange Key.
Is there trouble in the
remote-controller PCB
ASS'Y?
NO
YES
NO
Are there trouble in
LCD parts?
YES
1. Check crack, damage of LCD.
2. Check LCD pattern.
1. Check or repair all IC with
dust or moisture on the PCB.
2. Exchange remote-controller
PCB.
Possible trouble 3
: Key input of remote-controller does not respond.
Possible trouble 4
: LCD display on the remote-controller shows some trouble.