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2. AV STEREO/ MONO MODEL
Select correct system in menu
OK
OK
OK
OK
NO
NO
Does the auto - Program
operate properly
Check TU101 Tuner
Check the voltage of pin3, 9,
16, 43, 86,88,90 of IC501
Check the waveform at
pin57, 58 of IC501
OK
Check the signal line of SPK-N,P
Check the waveform at
pin4, 12, of IC601
NO
NO
OK
Check pin5 (mute) of IC501
Check the waveform at
pin6 of IC601
OK
NO
NO
Check the connection of AV
equipment
AV
OK
OK
Check the connection of side
or Front AV Board P201A
Check the voltage at
pin3, 13, of IC601
Check/ Replace
R823, D826
Correct the Board
Check the waveform at
pin1, 2, 14, 15 of IC601
Replace IC601