Toshiba RD-XV47KE Service Manual page 38

FLOW CHART NO.11
Hi-Fi E-E audio does not operate normally.
Are the audio signals inputted to each pin of
IC1509?
IC1509 93,94PIN AUDIO-IN1 (AV1)
IC1509 91,92PIN AUDIO-IN1 (FRONT)
IC1509 89,90PIN AUDIO-IN2 (AV2)
IC1509 84,85PIN TUNER-AUDIO
Are the audio signals outputted to Pin(69,70) of
IC1509?
Is the audio signal inputted to Pin(4,50) of IC451?
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?
Are the audio signals outputted to each pin
of IC1509?
IC1509 73,74PIN AUDIO-OUT 1 (AV1)
IC1509 71,72PIN AUDIO-OUT 2 (AV2)
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
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Check the line between audio input terminal and
each pin of IC1509, and service it if defective.
No (Rear
or Front
IC1509 93,94PIN
input)
IC1509 91,92PIN
No
IC1509 89,90PIN
(Tuner)
Is SIF signal inputted to Pin(2) of IC1?
Are the audio signal outputted
to Pin(30,31) of IC1?
Check the line between
Pin(30,31) of IC1 and
Pin(84,85) of IC1509, and
service it if defective.
No
Is 5V voltage supplied to Pin(27,29,47,63) of
IC1509?
Is 9V voltage supplied to Pin(75) of IC1509?
Yes
Replace IC1509
No
Check the line between Pin(69,70) of IC1509 and
Pin(4,50) of IC451, and service it if defective.
No
Check the circuit of AL+5V, P-ON+5V and
P-ON+9V, and service it if defective.
No
Check the line between Pin(37,38) of IC451 and
Pin(71,72) of IC501, and service it if defective.
No
Replace IC451.
No
Check the line between Pin(74,76) of IC451 and
Pin(81,82) of IC1509, and service it if defective.
No
Is 5V voltage supplied to Pin(27,29,47,63) of
IC1509?
Is 9V voltage supplied to Pin(75) of IC1509?
Yes
Replace IC1509
No
Check the line between Pin(73,74) of IC1509 and
audio terminal (JK1504), and service it if defective.
Check the line between Pin(71,72) of IC1509 and
No
audio terminal (JK2001), and service it if defective.
1-11-15
→JK1504
AUDIO-IN1 (AV1)
→JK3002,
AUDIO-IN1 (FRONT)
JK3003
→JK2001
AUDIO-IN2 (AV2)
Yes
Replace TU1501.
No
Yes
Replace IC1.
No
Check the AL+5V(2) , AL+9V
line and service it if defective.
No
Check the AL+5V(2) , AL+9V
line and service it if defective.
No
E3B90TR