LG MCD112 - Aux Function Check

3-8
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Only for training and service purposes
LGE Internal Use Only
10. AUX FUNCTION CHECK
AUX function check
Check µ-COM(IC301)_
PIN83, 84 commucation.
NO
NO
YES
Replace IC200
YES
YES
YES
Check
IC200(BU4052)_
PIN4, 11 input
waveform.
Check
IC200(BU4052)_PIN16
VDD, PIN8 VSS
power.
Refer to
SMPS troubleshooting.
NO
NO
YES
Replace IC801OK
YES
YES
Check
IC801(MC4580)_PIN 2, 6
input waveform.
Check
IC801(MC4580)_PIN4
VSS, PIN8 VDD
power.
Check IC200(BU4052)_
PIN3, 13 output waveform.
Check JK800 connection.