LG MCV903 Service Manual page 39

YES
IC701 Check
9PIN +9V, 14PIN -9V
YES
CN702
12 PIN LOW¡OFF
HIGH¡ON
YES
IC701 1,6PIN R-CH,
17,22PIN L-CH output waveform
YES
Check the
output LINE COIL
YES
OK
LGE Internal Use Only
Check CN702 3PIN
NO
(PROTECION) LOW and HIGH
LOW¡normal operation
HIGH¡PROTECION
YES
Check the
normal operation condition
of each power
YES
OK
NO
Replace the related part
3-18
NO
Replace the AMP module and
the said part
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