Micom Part Check Ii - LG XC62-A0U Service Manual

3. MICOM PART CHECK II

MICOM part check II
YES
Check if
voltage of P7904_PIN5
is 5.6V.
YES
Check
both end voltage of
D101
YES
Check
Q101_ emitter/collector
5V.
YES
Check if IC103_PIN8 and
IC100_PIN19, 20, 59 are 5V.
YES
X101 : 32.768kHz
X100 : 9.8304MHz
Check the operation.
YES
OK
NO
Refer to
SMPS troubleshooting.
NO
Check if output of
D101(RL104) is 5V.
YES
Check D101.
YES
OK
NO
Check Q102_base
0.6V HIGH.
YES
Q102_collector 0.6V LOW.
YES
Check Q102.
YES
OK
NO
Replace D101.
NO Check if output of IC101
(KIA7042) is over 4.3V.
Check IC101.
OK
NO
Replace Q102.
3-5
YES
NO
Replace IC101.
YES