Micom Part Check Ii - LG MBD-D102X Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART

2. MICOM PART CHECK II

MICOM part check II
YES
Check P7904
5PIN 5.6V
YES
Check power of
both terminals of D101
1SR35
YES
Check
Q101 EMITTER 5V
and COLLECTOR
5V
YES
Check IC103 8PIN IC100
19, 20, 59PIN 5V
YES
Check the working condition
X101: 32.768kHz
X100: 9.8304MHz
YES
OK
NO
Refer to SMPS
Troubleshooting
NO
Check D101 1SR35
output is working on 5V
YES
Check the
related part
YES
OK
Check Q102
NO
BASE PIN 0.6V
HIGH
YES
Check Q102 COLLECTOR
YES
Check the
related part.
YES
OK
NO Replace the
related parts
Check output power
NO
of IC101 KIA7042 is
over 4.3V.
Check the
related part.
OK
NO
Replace the
related parts
3-2
YES
NO Replace the
related parts
YES