1-11-8 E3B90TR
Is SIF signal inputted to Pin(2) of IC1?
Are the audio signal outputted
to Pin(30,31) of IC1?
Replace TU1501.
Replace IC1.
Ye s
Check the line between
Pin(30,31) of IC1 and
Pin(84,85) of IC1509, and
service it if defective.
Ye s
No
No
Check the AL+5V(2) , AL+9V
line and service it if defective.
Replace IC1509
Ye s N o
FLOW CHART NO.6
Audio E-E does not appear normally.
Are the audio signals inputted to each pin of
IC1509?
Check the line between audio input terminal and
each pin of IC1509, and service it if defective.
Are the audio signals outputted to Pin(79,80) of
IC1509?
Ye s
Are the audio signals outputted to Pin(1,7) of
IC1506?
Ye s
No (Rear
or Front
input)
No (Tuner)
Replace IC1506.
No
No
IC1509 AUDIO-IN1 (AV1)93,94PIN
IC1509 AUDIO-IN1 (FRONT)91,92PIN
IC1509 AUDIO-IN2 (AV2)89,90PIN
IC1509 TUNER-AUDIO84,85PIN
IC
1509
→
JK
1504
93,94PIN
IC
1509
→
JK3002,
JK3003
91,92PIN
IC
1509
→
JK200189,90PIN
AUDIO-IN1 (AV1)
AUDIO-IN1 (FRONT)
AUDIO-IN2 (AV2)
Is 5V voltage supplied to Pin(27,29,47,63) of
IC1509?
Is 9V voltage supplied to Pin(75) of IC1509?
Continued to B on the next page.