Toshiba DVR80KF Service Manual page 30

FLOW CHART NO.3
The [No Disc] indication.
Both picture and sound do not operate normally.
Replace the P2(DVD MECHANISM & DVD MAIN
BOARD ASSEMBLY).
FLOW CHART NO.4
VIDEO E-E does not appear normally.
Are the video signals inputted to each pin of IC1509?
IC1509 20PIN VIDEO-IN 1 (AV1)
IC1509 3PIN DTV-Y
IC1509 5PIN DTV-C
IC1509 12PIN VIDEO-IN 2 (AV2)
IC1509 18PIN TUNER-VIDEO
Are the video signals outputted to each pin of IC1509?
IC1509 61PIN VIDEO-Y/CVBS-IN
IC1509 59PIN VIDEO-C-IN
Are the video signals outputted to each pin of CN1502?
CN1502 20PIN VIDEO-Y/CVBS-IN
CN1502 22PIN VIDEO-C-IN
Are the video signals outputted to each pin of CN1502?
CN1502 7PIN VIDEO-Y(I/P)-OUT
CN1502 1PIN VIDEO-Y(I)-OUT
CN1502 5PIN VIDEO-Pr/Cr-OUT
CN1502 3PIN VIDEO-Pb/Cb-OUT
CN1502 9PIN VIDEO-C-OUT
Are the video signals shown above inputted into each
pin of IC1509?
IC1509 51PIN VIDEO-Y(I/P)-OUT
IC1509 55PIN VIDEO-Y(I)-OUT
IC1509 52PIN VIDEO-Pr/Cr-OUT
IC1509 53PIN VIDEO-Pb/Cb-OUT
IC1509 57PIN VIDEO-C-OUT
Continued to A on the next page.
Yes
Yes
Yes
Yes
Yes
No
Check the line between video input terminal and
each pin of IC1509, and replace P1(AV ASSEMBLY),
P6(BOARD DTV MODULE UNIT) or TU1800.
→ JK1504
IC1509 20PIN
→ CN1800 26PIN
IC1509 3PIN
→ CN1800 28PIN
IC1509 5PIN
→ JK2001
IC1509 12PIN
→ TU1800 17PIN
IC1509 18PIN
No
Is 5V voltage supplied to Pin(27,29,47,63) of IC1509?
Is 9V voltage supplied to Pin(75) of IC1509?
Yes
Replace P1(AV
ASSEMBLY).
No
Check the line between each pin of IC1509 and
each pin of CN1502 and replace P1(AV ASSEMBLY)
if defective.
→ CN1502
IC1509 61PIN
→ CN1502
IC1509 59PIN
No
Replace the P2(DVD MECHANISM & DVD MAIN
BOARD ASSEMBLY).
Check the line between each pin of CN1502 and
each pin of IC1509, and replace P1(AV ASSEMBLY)
No
if defective.
→ IC1509
CN1502 7PIN
→ IC1509
CN1502 1PIN
→ IC1509
CN1502 5PIN
→ IC1509
CN1502 3PIN
→ IC1509
CN1502 9PIN
1-11-7
VIDEO-IN 1 (AV1)
DTV-Y
DTV-C
VIDEO-IN 2 (AV2)
TUNER-VIDEO
No
Check the ECO+5V, ECO+9V
line and replace P1(AV
ASSEMBLY) or P4(PW/SW
ASSEMBLY) if defective.
20PIN VIDEO-Y/CVBS-IN
22PIN VIDEO-C-IN
51PIN VIDEO-Y(I/P)-OUT
55PIN VIDEO-Y(I)-OUT
52PIN VIDEO-Pr/Cr-OUT
VIDEO-Pb/Cb-OUT
53PIN
57PIN VIDEO-C-OUT
E9TK3TR