LG MBD-D102X Service Manual page 22

ELECTRICAL TROUBLESHOOTING GUIDE OF AUDIO PART
No 5.0V
YES
Is the Vcc(5.6V)
supplied to IC961 1PIN?
YES
Is the IC957 4PIN "H"?
YES
Check or Replace the IC961
No 3.5V
YES
Is the Vcc(4.2V)
supplied to IC964 1PIN?
YES
Is the IC964 4PIN "H"?
YES
Check or Replace the IC964
No 12V
YES
Is the Vcc(14V)
supplied to IC962 1PIN?
YES
Is the IC962 4PIN "H"?
YES
Check or Replace the IC962
NO
Check or Replace the D965
NO
Check the CD CTL "H"
signal from u-com
NO
Check or Replace the D967
NO
Check the P CTL "H"
signal from u-com
NO
Check or Replace the D966
NO
Check the P CTL "H"
signal from u-com
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