Electronic Parts Troubleshooting Guide - LG LB-H1860HL Service Manual

Electronic Parts Troubleshooting Guide

Possible Trouble 1
Is the input voltage
of transformer AC230V?
YES
Is the input voltage
of IC03D about AC12V?
YES
Is the output voltage
of IC03D DC5V?
YES
Is the PIN 49,58 of
MICOM. DC5V?
YES
Exchange MICOM.
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Only for training and service purposes
: The unit does not operate.
NO
NO
NO
NO
- 44 -
Check the FUSE
and the wiring diagram.
Check the main P.C.B
pattern.
Exchange IC03D.
Check the
5V P.C.B pattern.
LGE Internal Use Only