Toshiba rd-xv48dtkb Service Manual page 42

FLOW CHART NO.11
Hi-Fi E-E audio does not operate 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(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, and 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 replace P1(AV ASSEMBLY), P6
(BOARD DTV MODUDLE UNIT) or TU1800 if defective.
No
IC1509 86,87PIN
IC1509 91,92PIN
IC1509 89,90PIN
IC1509 84,85PIN
IC1509 93,99PIN
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 Pin(69,70) of IC1509 and
Pin(4,50) of IC451, and replace P1(AV ASSEMBLY)
if defective.
No
Check the circuit of AL+5V, P-ON+5V and P-ON+9V,
and replace P1(AV ASSEMBLY) if defective.
No
Check the line between Pin(37,38) of IC451 and
Pin(71,72) of IC501, and replace P1(AV ASSEMBLY)
if defective.
No
Replace P1(AV ASSEMBLY).
No
Check the line between Pin(74,76) of IC451 and
Pin(81,82) of IC1509, and replace P1(AV ASSEMBLY)
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 P1(AV
ASSEMBLY).
Check the line between Pin(73,74) of IC1509 and audio
No
terminal (JK1504), and replace P1(AV ASSEMBLY) if
defective.
Check the line between Pin(71,72) of IC1509 and audio
No
terminal (JK2001), and replace P1(AV ASSEMBLY) if
defective.
1-11-17
→
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) if defective.
No
Check the ECO+5V, ECO+9V
line and replace P1(AV
ASSEMBLY) if defective.
E3NG1TR