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.
Yes
Check the line between
Pin(30,31) of IC1 and
Pin(84,85) of IC1509, and
service it if defective.
Yes
No
No
Check the AL+5V(2) , AL+9V
line and service it if defective.
Replace IC1509
Yes
No
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?
Yes
Are the audio signals outputted to Pin(1,7) of
IC1506?
Yes
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-AUDIO
84,85PIN
IC1509
→
JK1504
93,94PIN
IC1509
→
JK3002,
JK3003
91,92PIN
IC1509
→
JK2001
89,90PIN
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.
