FUNAI DRVR-B778S Service Manual page 29

FLOW CHART NO.4
VIDEO E-E does not appear normally.
Are the video signals inputted to each pin of
IC1518?
IC1518 1PIN VIDEO-IN1 (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 each pin of IC1507?
IC1507 19PIN VIDEO-Y/CVBS-IN
IC1507 21PIN VIDEO-C-IN
Are the video signals inputted to each pin of CN1502?
CN1502 20PIN VIDEO-Y/CVBS-IN
CN1502 22PIN VIDEO-C-IN
(S-VIDEO/Composite video out)
Continued to "A" on the FLOW CHART NO. 5.
< Picture does not appear normally. [In the
S-VIDEO/Composite video output (JK1502,
JK1506, JK2001)] >
(RGB/Component video out)
Continued to "B" on the FLOW CHART NO. 6.
< Picture does not appear normally. [In the RGB/
Component video output (JK1501, JK1502)] >
Yes
Yes
Yes
Yes
Yes
No
Check the line between video input terminal and
each pin of IC1518.
1PIN → JK1502 VIDEO-IN1 (AV1)
IC1581
3PIN → JK2001 VIDEO-IN2 (AV2)
IC1581
IC1581 28PIN → TU1501 17PIN TUNER-VIDEO
No
Is 12V voltage supplied to Pin(2,4) of IC1518?
Yes
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.
Check the line between each pin of IC1507 and
No
each pin of CN1502.
IC1507 19PIN → CN1502 20PIN VIDEO-Y/CVBS-IN
IC1507 21PIN → CN1502 22PIN VIDEO-C-IN
1-11-5
No
Check AL+12V(1) line and
service it if defective.
No
Check DVD-P-ON+5V line
and service it if defective.
E9G01TR