Toshiba D-VR40SF Service Manual page 37

FLOW CHART NO.10
Video E-E does not appear.
Are the video signals inputted to each pin of
IC1518?
IC1518 1PIN VIDEO-IN (AV1)
IC1518 3PIN VIDEO-IN2 (AV2)
IC1518 28PIN TUNER-VIDEO
Are the video signals outputted to Pin(31) of IC1518?
Are the video signals inputted to each pin of IC1507?
IC1507 12PIN TUNER/LINE VIDEO
IC1507 15PIN FRONT-Y-IN
IC1507 4PIN FRONT-C-IN
IC1507 10PIN FRONT-VIDEO-IN
Are the video signals outputted to Pin(20) of IC1507?
Is the video signal inputted to Pins(48) of IC301?
Is the C-SYNC signal outputted to Pin(67) of IC301?
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(5) of IC1508?
Is the video signal outputted to Pin(4) of IC1508?
Is the video signal inputted to Pin(5) of IC1518?
Continued to "E" on the next page.
Yes
Yes
Yes
Yes
Yes
Yes
No
Replace IC301.
Yes
No
Yes
No
Check the line between video input terminal and
each pin of IC1518.
1PIN → JK1502 VIDEO-IN (AV1)
IC1581
3PIN → JK2001 VIDEO-IN2 (AV1)
IC1581
IC1581 28PIN → TU1501 17PIN TUNER-VIDEO
No
Is 12V voltage supplied to Pin(2,4) of IC1518?
No
Replace IC1518.
Check the line between each pin of IC1507 and
No
Pin(31) of IC1518 and video input terminal.
IC1507 12PIN → IC1518 31PIN TUNER/LINE VIDEO
IC1507 15PIN → JK1204 FRONT-Y-IN
IC1507 4PIN → JK1204 FRONT-C-IN
IC1507 10PIN → JK1201 FRONT-VIDEO-IN
No
Is 5V voltage supplied to Pin(1) of IC1507?
Yes
Replace IC1507.
No
Check the line between Pin(20) of IC1507 and
Pin(48) of IC301, and service it if defective.
Is 5V voltage supplied to Pins(18,24,42,55,72) of IC301?
Yes
Check the P-ON+5V line and AL+5V line,
and service it if defective.
Yes
Is the serial data and clock signal
supplied to Pins(68,69) of IC301?
Check the line between Pins(68,69) of IC301
and Pins(71, 72) of IC501, and service it if
defective.
No
Check the line between Pin(65) of IC301 and
Pin(5) of IC1508, and service it if defective.
Yes
Is 5V voltage supplied to Pin(1) of IC1508?
Is -5V voltage supplied to Pin(7) of IC1508?
Yes
Replace IC1508.
No
Check the line between Pin(4) of IC1508 and
Pin(5) of IC1518, and service it if defective.
1-10-16
Yes
Check AL+12V(I) line and
service it if defective.
No
Check the DVD-P-ON+5V line
and service it if defective.
No
No
No
No
Check the AL+5V(1) and AL-5V
line, and service it if defective.
E9BA1TR