1-11-15
E3B90TR
FLOW CHART NO.11
Hi-Fi E-E audio does not operate normally.
No
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
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(69,70) of
IC1509?
Yes
Yes
No (Rear
or Front
input)
No
(Tuner)
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
AUDIO-IN1 (AV1)
IC1509
→
JK3002,
JK3003
91,92PIN
IC1509
→
JK2001
89,90PIN
AUDIO-IN1 (FRONT)
AUDIO-IN2 (AV2)
Check the AL+5V(2) , AL+9V
line and service it if defective.
Replace IC1509
Yes
No
Is 5V voltage supplied to Pin(27,29,47,63) of
IC1509?
Is 9V voltage supplied to Pin(75) of IC1509?
Yes
Check the line between Pin(73,74) of IC1509 and
audio terminal (JK1504), and service it if defective.
Are the audio signals outputted to the specific
output terminal?
Are the audio signals outputted to the audio
terminal (JK1504)?
Are the audio signals outputted to the audio
terminal (JK2001)?
Yes
IC1509 73,74PIN AUDIO-OUT 1 (AV1)
IC1509 71,72PIN AUDIO-OUT 2 (AV2)
Are the audio signals outputted to each pin
of IC1509?
No
No
Check the line between Pin(71,72) of IC1509 and
audio terminal (JK2001), and service it if defective.
No
Check the AL+5V(2) , AL+9V
line and service it if defective.
Replace IC1509
Yes
No
Is 5V voltage supplied to Pin(27,29,47,63) of
IC1509?
Is 9V voltage supplied to Pin(75) of IC1509?
Check the line between Pin(69,70) of IC1509 and
Pin(4,50) of IC451, and service it if defective.
Check the circuit of AL+5V, P-ON+5V and
P-ON+9V, and service it if defective.
Is the 5V voltage supplied to Pin(16,32,35,36,46,55) of
IC451, or the 9V voltage supplied to Pin(69) of IC451?
Is the serial data and the clock signal supplied to
Pin(37,38) of IC451?
Is the audio signal outputted to Pin(74,76)
of IC451?
Is the audio signal inputted into Pin(81,82) of
IC1509?
Is the audio signal inputted to Pin(4,50) of IC451?
Yes
Yes
Yes
Yes
No
No
No
No
No
Check the line between Pin(37,38) of IC451 and
Pin(71,72) of IC501, and service it if defective.
Check the line between Pin(74,76) of IC451 and
Pin(81,82) of IC1509, and service it if defective.
Replace IC451.
