
3-1
ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART
SECTION 3 ELECTRICAL
1. MICOM PART CHECK I
MICOM part check I
OK
OK
YES
YES
YES
Check P7904
6PIN P-SENS
NO
Refer to SMPS
Troubleshooting
YES
YES
Check
power of both
terminals of IC101
KIA7042
Check
if IC101 KIA7042
input is over 5V.
YES
NO
Check
the related part of
IC101 KIA7042
NO
YES
Check if output voltage
of IC101 KIA7042 is 4.3V
Check IC100 78KO/KF2
1PIN power
NO
Replace the
related parts
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