8-5 FL10.3TR
[ Video Signal Section ]
No
Is the "L" pulse sent out Pin(1) ter
minal of remote
control receiver (RS102) when the infrared remote
control is activated?
Check the line between Pin(1) terminal of remote
control receiver(RS102) and Pin(25) of CN301,
and service it if defective.
Ye s
Is the "L" pulse supplied to Pin(25
) of CN301?
Ye s
Is 3.3V voltage supplied to Pin(2) terminal of the
remote control receiver (RS102)?
No
FLOW CHART NO.2
Operation is pos
sible from the unit.
Check AL+3.3V line and service it if defective.
No
Replace the remote control receiver(RS102)
or the remote control unit.
Ye s
Replace Digital Main CBA Unit.
When pressing each switches (SW101A, SW103A~
SW107A) do the v
oltage of Pin(29) of CN302 increase?
Ye s
The key operation is not functioning.
FLOW CHART NO.1
Are the contact point and installation state of the key
switches (SW101A, SW103A~SW107A) nor
mal?
Re-install the switches (SW101A, SW103A~SW107A)
correctly or replace the poor switch.
Check the switches (SW101A, SW103A~SW107A)
and their periphery circuit, and service it if defective.
Ye s
Replace Digital Main CBA Unit.
No
No
No operation is possible from the remote control unit.
Picture does not appear normally.(Video input)
FLOW CHART NO.3
Are the video signal inputted to Pin
(4) of CN302?
Ye s
Ye s
Check the line b
etween Pin(4) of CN302 and
JK752, and service it if defective.
No
Is the "H" level
signal inputted to the Pin(5) of CN302?
Check JK751, R763 and their periphery circuit, and
service it if de
fective.
No
Replace Digital Main CBA Unit or LCD Module
Assembly.
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