Toshiba RD-XV48DTKB, Service Manual

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1-11-17 E3NG1TR
FLOW CHART NO.11
Hi-Fi E-E audio does not operate normally.
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 replace P1(AV ASSEMBLY), P6
(BOARD DTV MODUDLE UNIT) or TU1800 if defective.
Are the audio signals outputted to Pin(69,70) of IC1509?
Yes
Yes
IC1509 AUDIO-IN1 (AV1) 86,87PIN
IC1509 AUDIO-IN (FRONT) 91,92PIN
IC1509 AUDIO-IN2 (AV2) 89,90PIN
IC1509 TUNER-AUDIO 84,85PIN
IC1509 DTV-AUDIO 93,94PIN
IC1509
→
JK1504 86,87PIN
AUDIO-IN1 (AV1)
IC1509 JK3002,
JK3003 91,92PIN
IC1509
→
JK2001 89,90PIN
AUDIO-IN (FRONT)
IC1509
→
TU1800 6PIN 84,85PIN
TUNER-AUDIO
IC1509
→
CN1800 29,30PIN 93,99PIN DTV-AUDIO
AUDIO-IN2 (AV2)
Check the ECO+5V, ECO+9V
line and replace P1(AV
ASSEMBLY) if defective.
Replace P1(AV
ASSEMBLY).
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 replace P1(AV ASSEMBLY) 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 replace P1(AV ASSEMBLY) if
defective.
No
Check the ECO+5V, ECO+9V
line and replace P1(AV
ASSEMBLY) if defective.
Replace P1(AV
ASSEMBLY).
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 replace P1(AV ASSEMBLY)
if defective.
Check the circuit of AL+5V, P-ON+5V and P-ON+9V,
and replace P1(AV ASSEMBLY) if defective. 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?
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 replace P1(AV ASSEMBLY)
if defective.
Check the line between Pin(74,76) of IC451 and
Pin(81,82) of IC1509, and replace P1(AV ASSEMBLY)
if defective.
Replace P1(AV ASSEMBLY).
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