Toshiba RD-XV47KE Service Manual page 37

FLOW CHART NO.10
Video E-E does not appear normally.
Are the video signals inputted to each pin of
IC1509?
IC1509 16PIN VIDEO-IN 1 (AV1)
IC1509 14PIN VIDEO-IN (FRONT)
IC1509 12PIN VIDEO-IN 2 (AV2)
IC1509 20PIN TUNER-VIDEO
Yes
Are the video signals outputted to Pin(24) of IC1509
Yes
Is the video signal inputted to Pin(48) of IC301?
Yes
Is the C-SYNC signal outputted to Pin(67) of IC301?
Yes
Is the C-SYNC signal inputted to Pin(58) of IC501?
Yes
Check the line between Pin(67)
of IC301 and Pin(58) of IC501,
and service it if defective.
Is the video signal inputted into Pin(100) of IC1509?
Yes
Are the video signals outputted to each pin
of IC1509?
IC1509 30PIN VIDEO-OUT 1 (AV1)
IC1509 22PIN VIDEO-OUT 2 (AV2)
Yes
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)?
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No
No
No
No
Yes
Replace IC301.
No
No
No
No
1-11-14
Check the line between video input terminal and
each pin of IC1509.
→ JK1504
IC1509 16PIN
→ JK3001
IC1509 14PIN
→ JK2001
IC1509 12PIN
→ TU1501
IC1509 20PIN
17PIN
Is 5V voltage supplied to Pin(27,29,47,63) of
IC1509?
Is 9V voltage supplied to Pin(75) of IC1509?
Yes
Check the AL+5V(2) , AL+9V
Replace IC1509.
line and service it if defective.
Check the line between Pin(24) of IC1509 and
Pin(48) of IC301, and service it if defective.
Is 5V voltage supplied to Pin(18,24,42,55,72,91)
of IC301?
Yes
Check the P-ON+5V line and AL+5V line,
and service it if defective.
Is the serial data and clock signal
supplied to Pin(68,69) of IC301?
No
Check the line between Pin(68,69) of IC301
and Pin(71, 72) of IC501, and service it if
defective.
Check the line between Pin(61) of IC301 and
Pin(100) of IC1509, and service it if defective.
Is 5V voltage supplied to Pin(27,29,47,63) of
IC1509?
Is 9V voltage supplied to Pin(75) of IC1509?
Yes
Check the AL+5V(2), AL+9V
Replace IC1509.
line and service it if defective.
Check the periphery of JK1504 from Pin(30) of
IC1509 and service it if defective.
Check the periphery of JK2001 from Pin(22) of
IC1509 and service it if defective.
VIDEO-IN 1 (AV1)
VIDEO-IN (FRONT)
VIDEO-IN 2 (AV2)
TUNER-VIDEO
No
No
No
No
E3B90TR