Toshiba DVR610 - DVDr/ VCR Combo Service Manual page 27

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
Are the video signals outputted to each pin of
IC2404 and each pin of IC2405?
IC2405 13PIN VIDEO-Y(I/P)
IC2405 10PIN VIDEO-Pr/Cr
IC2405 11PIN VIDEO-Pb/Cb
IC2404 6PIN VIDEO-CVBS
IC2404 5PIN VIDEO-Y(I)
IC2404 7PIN VIDEO-C
Are the video signals outputted to the specific
output terminal?
Are the luminance signals outputted to the
S-VIDEO OUT terminal (JK2402)?
Are the chroma signals outputted to the
S-VIDEO OUT terminal (JK2402)?
Are the Y, Pb/Cb, Pr/Cr signals outputted to the
COMPONENT OUT terminal (JK2403)?
Are the composite video signals outputted to
the VIDEO OUT terminal (JK2751)?
Is the video signal outputted to Pin(15) of IC2406?
Is the video signal outputted to the emitter of Q2391?
Yes
Check the line between the
emitter of Q2391 and JK2751,
and replace P1 (BOARD MCV)
if defective.
A
Yes
Yes
Yes
No
Replace P1
(BOARD MCV).
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
No
Is 5V voltage supplied to the Pin(4, 12) of
IC2405 and the Pin(4) of IC2404?
Yes
Replace
P1 (BOARD MCV).
Check the periphery of JK2402 from Pin (5) of
No
IC2404 and replace P1 (BOARD MCV) if defective.
Check the periphery of JK2402 from Pin (7) of
No
IC2404 and replace P1 (BOARD MCV) if defective.
No
Check the periphery of JK2403 from Pin (10, 11,
13) of IC2405 and replace P1 (BOARD MCV)
if defective.
No
No
Are the "L" pulse inputted to Pin(9,10,11) of IC2406?
Is 5V voltage supplied to
Pin(16) of IC2406?
Is -5V voltage supplied to
Pin(7) of IC2406?
Yes
Replace P1
(BOARD MCV).
1-10-6
→ IC2405
3PIN VIDEO-Y(I/P)
→ IC2405
8PIN VIDEO-Pr/Cr
→ IC2405
VIDEO-Pb/Cb
6PIN
→ IC2404
VIDEO-Y(I)
3PIN
→ IC2404
VIDEO-C
1PIN
No
Check P-ON+5V line and
replace P1 (BOARD MCV)
or P3 (BOARD POWER
SUPPLY) if defective.
Yes
Replace P1
(BOARD MCV).
No
Check AL+5V, and AL-5V line
and replace P1 (BOARD MCV)
or P3 (BOARD POWER
SUPPLY) if defective.
E9KGATR
No