Toshiba D-VR7KC Service Manual page 29

FLOW CHART NO.4
The disc tray cannot be opened and closed.
[No Disc] indicated.
Both functions of picture and sound do not operate normally.
Replace P2 (DVD MECHANISM & DVD MAIN
BOARD ASSEMBLY).
FLOW CHART NO.5
VIDEO E-E does not appear normally.
Are the video signals inputted to each pin of
IC2805?
IC2805 8PIN VIDEO-IN 1 (REAR)
IC2805 13PIN Y-IN (REAR)
IC2805 2PIN C-IN (REAR)
IC2805 10PIN VIDEO-IN 2 (FRONT)
IC2805 17PIN ATU-VIDEO
Are the video signals outputted to each pin of
IC2805?
IC2805 19PIN VIDEO-Y/CVBS
IC2805 21PIN VIDEO-C
Are the video signals outputted to each pin of
CN2201?
CN2201 20PIN VIDEO-Y/CVBS
CN2201 22PIN VIDEO-C
Are the video signals outputted to each pin of
CN2201?
CN2201 7PIN VIDEO-Y(I/P)
CN2201 5PIN VIDEO-Pr/Cr
CN2201 3PIN VIDEO-Pb/Cb
CN2201 1PIN VIDEO-Y(I)
CN2201 9PIN VIDEO-C
Are the video signals shown above inputted into
each pin of IC2404 and each pin of IC2405?
IC2405 3PIN VIDEO-Y(I/P)
IC2405 8PIN VIDEO-Pr/Cr
IC2405 6PIN VIDEO-Pb/Cb
IC2404 3PIN VIDEO-Y(I)
IC2404 1PIN VIDEO-C
Continued to A on the next page.
Yes
Yes
Yes
Yes
Yes
1-10-6
No
Check the line between video input terminal and
each pin of IC2805 ,and replace P1 (BOARD
MCV) if defective.
IC2805 8PIN
IC2805 13PIN
IC2805 2PIN
10PIN
IC2805
IC2805 17PIN
Is 5V voltage supplied to Pin(1) of IC2805?
Yes
Replace
P1 (BOARD MCV).
No
Check the line between each pin of IC2805 and
each pin of CN2201 and replace P1 (BOARD
MCV) if defective.
IC2805 19PIN
21PIN
IC2805
No
Replace P2 (DVD MECHANISM & DVD MAIN
BOARD ASSEMBLY).
Check the line between each pin of CN2201 and
each pin of IC2404 and IC2405, and replace
No P1 (BOARD MCV) if defective.
CN2201 7PIN
CN2201 5PIN
CN2201 3PIN
CN2201 1PIN
CN2201 9PIN
→ JK2804
VIDEO-IN 1 (REAR)
→ JK2401
Y-IN (REAR)
→ JK2401
C-IN (REAR)
→ JK2803
VIDEO-IN 2 (FRONT)
→ 4PIN
TUNER-VIDEO
No
Check P-ON+5V line and
replace P1 (BOARD MCV)
or P3 (BOARD POWER
SUPPLY) if defective.
→ CN2201
20PIN VIDEO-Y/CVBS
→ CN2201
22PIN VIDEO-C
→ IC2405
3PIN VIDEO-Y(I/P)
→ IC2405
8PIN VIDEO-Pr/Cr
→ IC2405 VIDEO-Pb/Cb
6PIN
VIDEO-Y(I)
→ IC2404
3PIN
→ IC2404 VIDEO-C
1PIN
E9KG0TR