Toshiba rd-xv48dtkb Service Manual page 35

FLOW CHART NO.6
Audio E-E does not appear normally.
Are the audio signals inputted to each pin of IC1509?
IC1509 86,87PIN AUDIO-IN1 (AV1)
IC1509 91,92PIN AUDIO-IN (FRONT)
IC1509 89,90PIN AUDIO-IN2 (AV2)
IC1509 84,85PIN TUNER-AUDIO
IC1509 93,94PIN DTV-AUDIO
Are the audio signals outputted to Pin(79,80) of IC1509?
Are the audio signals outputted to Pin(11,13) of CN1502?
Continued to B on the next page.
Yes
Yes
Yes
Check the line between audio input terminal and
each pin of IC1509, and replace P1(AV ASSEMBLY),
P6(BOARD DTV MODULE UNIT) or TU1800 if defective.
IC1509 86,87PIN
No
IC1509 91,92PIN
IC1509 89,90PIN
IC1509 84,85PIN
IC1509 93,94PIN
No
Is 5V voltage supplied to Pin(27,29,47,63) of IC1509?
Is 9V voltage supplied to Pin(75) of IC1509?
Yes
Replace P1(AV
ASSEMBLY).
No
Check the line between each pin of IC1509 and
each pin of CN1502, and replace P1(AV ASSEMBLY),
if defective.
IC1509 79PIN
IC1509 80PIN
1-11-10
→
JK1504 AUDIO-IN1 (AV1)
→
JK3002, AUDIO-IN (FRONT)
JK3003
→
JK2001 AUDIO-IN2 (AV2)
→
TU1800 6PIN TUNER-AUDIO
→
CN1800 29,30PIN DTV-AUDIO
No
Check the ECO+5V, ECO+9V
line and replace P1(AV
ASSEMBLY) or P3(PW/SW
ASSEMBLY) if defective.
→
CN1502 13PIN AUDIO(R)-IN
→
CN1502 11PIN
AUDIO(L)-IN
E3NG1TR