Sharp DV-RW550U - Page 41

1-11-15
E9656TS
FLOW CHART NO.10
Video E-E does not appear.
Ye s
Ye s
No
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
No
No
No
No
No
No
Is the C-SYNC signal outputted to Pin(25) of IC301?
Is the C-SYNC signal inputted to Pin(50) of IC501?
Is the video signal outputted to Pin(15) of IC1406?
Is 5V voltage supplied to Pin(23) of IC301?
Is the serial data, clock and chip select signal
supplied to Pin(53, 54, 55) of IC301?
Check the P-ON+5V line and service it
if defective.
Check the line between Pin(25)
of IC301 and Pin(50) of IC501,
and service it if defective.
Check the line between Pin(53,54,55) of IC301
and Pin(19,20,21) of IC501, and service it if
defective.
Check the line between Pin(15) of IC1406
and Q391,
and service it if defective.
Check the line between Pin(26) of IC301 and
Pin(1) of IC1406, and service it if defective.
Is the video signal inputted into Pin(1) of IC1406?
Is the video signal outputted to the emitter of Q391?
Replace IC301.
Check the line between
Pin(22,23,24) of IC805 and
Pin(57,58,59) of IC501, and
service it if defective.
Replace IC805.
Ye s N o
Are the video signals inputted to each pin of
IC805?
Check the line between video input terminal and
each pin of IC805, and service it if defective.
Is the video signal ouputtted to Pin(20) of IC805?
Ye s
Is the video signal inputted to Pin(30) of IC301?
Ye s
No
Check the line between Pin(20) of IC805 and
Pin(30) of IC301, and service it if defective.
No
No
IC805 VIDEO-IN1 (REAR)8PIN
IC805 VIDEO-IN2 (FRONT)10PIN
IC805 TU-VIDEO (TUNER)12PIN
Are active level of Pin(22,23,24) of IC805 become
as shown below?
INPUT
TUNER
LINE(REAR V)
LINE(REAR S)
22PIN 23PIN
HH
HH
LH
24PIN
H
L
L
LINE(FRONT S) L L
H
LINE(FRONT V) H L H
VIDEO-IN1 (REAR)
VIDEO-IN2 (FRONT)
IC805 → JK8048PIN
IC805 → JK80310PIN
TU-VIDEO (TUNER)
IC805 → TU900 18PIN12PIN
When only Line signal is not outputted...
check the line between the emitter of Q391 and the video
output terminal (JK751), and service it if defective.
When only RF signal is not outputted...
check the tuner (TU900), and the line between the emitter of
Q391 and Pin(6) of the tuner, and service it if defective.
Continued to C on the next page.