Toshiba RD-XV48DTKB, Service Manual

Page: 41 / 124

1-11-16 E3NG1TR
Yes
No
Are the video signals outputted to Pin(24) of IC1509?
Yes
Yes
Are the video signals inputted to each pin of IC1509? Check the line between video input terminal and each
pin of IC1509, and replace P1(AV ASSEMBLY), P6
(BOARD DTV MODULE UNIT) or TU1800 if defective.
No
IC1509 VIDEO-IN 1 (AV1) 18PIN
IC1509 VIDEO-IN (FRONT) 14PIN
IC1509 VIDEO-IN 2 (AV2) 12PIN
IC1509 TUNER-VIDEO
VIDEO-IN 1 (AV1)
VIDEO-IN 2 (AV2)
20PIN
IC1509 DTV-Y 3PIN
IC1509 DTV-C 5PIN
IC1509
→
JK1504 18PIN
VIDEO-IN (FRONT) IC1509
→
JK3001 14PIN
IC1509
→
JK2001 12PIN
TUNER-VIDEO IC1509
→
TU1800 20PIN 17PIN
26PIN
28PIN
DTV-Y IC1509
→
CN1800 3PIN
DTV-C IC1509
→
CN1800 5PIN
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?
FLOW CHART NO.10
Video E-E does not appear normally.
Is the video signal inputted to Pin(48) of IC301? Check the line between Pin(24) of IC1509 and Pin(48)
of IC301, and replace P1(AV ASSEMBLY) if defective.
Yes
Yes
Yes
Yes
No
Yes No
No
No
No
No
Is the C-SYNC signal outputted to Pin(67) of IC301?
Is the C-SYNC signal inputted to Pin(58) of IC501? Is 5V voltage supplied to Pin(18,24,42,55,72,91) of
IC301?
Is the serial data and clock signal supplied to Pin(68,69)
of IC301?
Check the P-ON+5V line and AL+5V line,
and replace P1(AV ASSEMBLY) if
defective.
Check the line between Pin(67)
of IC301 and Pin(58) of IC501,
and replace P1(AV ASSEMBLY)
if defective.
Check the line between Pin(68,69) of IC301 and Pin
(71, 72) of IC501, and replace P1(AV ASSEMBLY) if
defective.
Check the line between Pin(61) of IC301 and Pin(100)
of IC1509, and replace P1(AV ASSEMBLY) if defective.
Is the video signal inputted into Pin(100) of IC1509?
Replace P1(AV
ASSEMBLY).
Check the periphery of JK1504 from Pin(30) of IC1509
and replace P1(AV ASSEMBLY) if defective.
Are the video signals outputted to the specific output
terminal?
Are the composite video signals outputted to the
VIDEO-OUT terminal (JK1504)?
Are the composite video signals outputted to the
VIDEO-OUT terminal (JK2001)?
Yes
IC1509 30PIN VIDEO-OUT 1 (AV1)
IC1509 22PIN VIDEO-OUT 2 (AV2)
Are the video signals outputted to each pin of IC1509?
No
No
Check the periphery of JK2001 from Pin(22) of IC1509
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?