1-20 (No.YA683<Rev.001>)
No
Is the "L" pulse sent out Pin(1) of RS301 (remote control
receiver) when the infrared remote control is activated?
Check the line between Pin(1) of RS301 (remote
control receiver) and Pin(4) of CN104A, and service
it if defective.
Ye s
Is the "L" pulse supplied to the P
in(4) of CN104A?
Ye s
Is 3.3V voltage supplied to Pin(2) of RS301 (remote
control receiver)?
Are the composite video signals outputted to the
Pin(15) of IC851?
No
No operation is possible from the remote control unit.
FLOW CHART NO.17
Operation is possible from the unit.
Check AL+3.3V line and service it if defective.
No
Replace the RS301 (remote control receiver) or
remote control unit.
Ye s
Replace Digital Main PWB Unit.
Picture does not appear normally. (Video input/S-Video input/Y/Pb/Pr input/RGB input)
Are the video signals outputted to the specific
terminal?
Check the luminance signal line, and service it if
defective.
Check the chrominance signal line, and service it if
defective.
Check the RGB video signal line, and service it if
defective.
Check the component video(Y/Pb/Pr) signal line,
and service it if defective.
Check the line between each pin of CN101A and
CN102A and input terminal and service it if defective.
No
No
No
No
No
Ye s
Are the luminance signals outputted to the Pin(23) of
CN101A?
Are the chrominance signals outputted to the Pin(25)
of CN101A?
Are the component video(Y/Pb/Pr) signals outputted
to the Pin(18, 20, 21) of CN101A?
Are the RGB video signals outputted to the Pin(3, 4, 5)
of CN102A?
Are the composite video signals outputted to the Pin(1)
of CN102A?
(RCA JACK input)
Are the composite video signals inputted to the Pin(2)
of IC851?
(SCART JACK input)
Are the composite video signals inputted to the Pin(1)
of IC851?
Check the line between Pin(2) of IC851 and JK722,
and service it if defective.
Check the line between Pin(15) of IC851 and Pin(1) of
CN102A, and service it if defective.
Replace Digital Main PWB Unit or LCD Module
Assembly.
Ye s
Ye s
Ye s
FLOW CHART NO.18
No
Check the line between Pin(1) of IC851 and JK751,
and service it if defective.
No
Is approximately 9V voltage supplied to the Pin(16) of
IC851?
Replace IC851. Check P-ON+9V line,
and service it if defective.
No
Ye s
No
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