TOSHIBA D-VR50KF Repair Manual

FLOW CHART NO.5
Picture does not appear normally. [In the S-VIDEO/Composite video output (JK1502, JK1506, JK2001)]
Set the disc on the disc tray and playback."A"
No
Are the video signals inputted to each pin of CN1502? NoReplace DVD MECHANISM & DVD MAIN BOARD
ASSEMBLY.
CN1502 1PIN VIDEO-Y(I)-OUT
CN1502 9PIN VIDEO-C-OUT
Yes
Are the video signals inputted to each pin of IC1515? NoCheck the line between each pin of IC1515 and
each pin of CN1502, and service it if defective.
IC1515 3PIN VIDEO-Y(I)-OUT
IC1515 1PIN VIDEO-C-OUTIC1515 3PIN ? CN1502 1PIN VIDEO-Y(I)-OUT
IC1515 1PIN ? CN1502 9PIN VIDEO-C-OUT
Yes
No
Are the video signals outputted to each pin of IC1515?Is 5V voltage supplied to Pin(4) of IC1515?
IC1515 5PIN VIDEO-Y(I)-OUTYesNo
IC1515 7PIN VIDEO-C-OUTReplace IC1515.Check DVD-P-ON+5V line
IC1515 6PIN VIDEO-OUTand service it if defective.
Yes (VIDEO-Y(I)-OUT, Yes (VIDEO-OUT)
VIDEO-C-OUT)
No
Is the video signal inputted to Pin(3) of IC1508?Check the line between Pin(3) of IC1508 and
Pin(6) of IC1515, and service it if defective.
Yes
No
Is the video signal outputted to Pin(4) of IC1508?Is 5V voltage supplied to Pin(16) of IC1508?
Is -5V voltage supplied to Pin(7) of IC1508?
Yes
YesNo
Replace IC1508.Check AL+5V(1) and AL-5V
line, and service it if defective.
No
Is the video signal outputted to Pin(5) of IC1518?Check the line between Pin(5) of IC1518 and
Pin(4) of IC1508, and service it if defective.
Yes
No
Are the video signals outputted to each pin ofIs 12V voltage supplied to Pin(2,4) of IC1518?
IC1518?
YesNo
IC1518 29PIN VIDEO-OUT1Replace IC1518.Check AL+12V(1) line
IC1518 30PIN VIDEO-OUT2and service it if defective.
Yes
Are the video signals outputted to the specific
output terminal?
Check the periphery of JK1506 from Are the luminance signals outputted to the No
Pin (5) of IC1515 and service it if defective.S-VIDEO OUT terminal (JK1506)?
Are the chroma signals outputted to the Check the periphery of JK1506 from No
S-VIDEO OUT terminal (JK1506)?Pin (7) of IC1515 and service it if defective.
Are the composite video signals outputted to the NoCheck the periphery of JK1502 from Pin (29) of
VIDEO OUT (AV1) terminal (JK1502)?IC1518 and service it if defective.
Are the composite video signals outputted to the NoCheck the periphery of JK2001 from Pin (30) of
VIDEO OUT (AV2) terminal (JK2001)?IC1518 and service it if defective.
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