Electronic parts Troubleshooting Guide
- 38 -
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
YES
YES
YES
NO
YES
Is the input voltage of
transformer AC220V?
Is the output voltage
of IC02D(7805) on the
main PCB DC5V?
1. Check the Fuse.
2. Check the wiring of AC220V.
Is the output voltage
of IC01D(7812 ) on the
main PCB DC12V?
OSC01B vibration?
1. Exchange main PCB ASS'Y
1. Exchange remote-controller
2. Check or exchange the Main
PCB ASS'Y.
YES
NO
1. Exchange the transformer.
2. Check the connector of
transformer.
NO
NO
NO
YES
Is the output voltage
of IC01A(7036) on the
main PCB DC5V?
NO
1. Exchange IC01D(7812) on
the main PCB.
2. Check the D01D~D05D,
R05C on the main PCB.
1. Exchange IC01A(7036) on
the main PCB.
Is the output voltage of
transformer AC24V & AC13V?
1. Exchange OSC01B.
2. Check the pattern around
OSC01B on the main PCB.
Is the input voltage
of remote-controller
DC12V?
YES
NO
YES
Is the power ON?
NO
1. Check the FUSE.
2. Check the input voltage of
Main PCB ASS'Y.
1. Check or exchange the IC01D
on the Main PCB.
2. Check or exchange the
Connector (RED, BROWN)
of the remote controller.
1. Exchange IC02D(7805) on
the main PCB.
2. Check the D01D~D05D, R05C
on the main PCB.
Possible trouble 1
: The unit does not operate.
Possible trouble 2
: The remote-controller does not operate.
Summary of Contents for LK-0580AC
Page 66: ...P NO 3828A30027F AUGUST 2009 ...
