LG MCV903 - Page 39

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