1-10-10 E8E6DTR
FLOW CHART NO.10
Video E-E does not appear.
Is the Video signal inputted to Pin(28,30) of IC301?
Check the line between the video input
terminal (rear) and Pin(28) of IC301, and
service it if defective.
Check the line between the video input
terminal (front) and Pin(30) of IC301, and
service it if defective.
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
No
Ye s N o
No
No
No
No
Is the C-SYNC signal outputted to Pin(25) of IC301?
Is the C-SYNC signal inputted to Pin(41) of IC501?
Is approximately +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.
Ye s
No
No
Is the "H" pulse inputted into Pin(9,10,11)
of IC751?
Ye s
No
Replace IC751.
Replace IC501.
Is approximately 5V voltage supplied to Pin(16)
of IC751, and approximately -5V voltage supplied
to Pin(7) of IC751?
Check the AL+5V line and the
AL-30V line (R777,D777), and service it if defective.
Check the line between Pin(25)
of IC301 and Pin(41) of IC501,
and service it if defective.
Check the line between Pin(53,54,55) of IC301
and Pin(14,15,16) of IC501, and service it if
defective.
Check the line between Pin(15) of IC751 and
video
output terminal (JK751), and service it if defective.
Check the line between Pin(26) of IC301 and
Pin(1) of IC751, and service it if defective.
Is the video signal inputted into Pin(1) of IC751?
Is the video signal outputted to Pin(15) of IC751?
Replace IC301.
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