8-4 A91H2TR
[ Video Signal Section ]
No
Is the "L" pulse sent out Pin(1) terminal of remote
control receiver (RS301) when the infrared remote
control is activated?
Check the line between Pin(1) terminal of remote
control receiver(RS301) and Pin(1) of CN202,
and service it if defective.
Ye s
Is the "L" pulse supplied to Pin(1) of CN202?
Ye s
Is 3.3V voltage supplied to Pin(2) terminal of the
remote control receiver (RS301)?
No
FLOW CHART NO.2
Operation is possible from the remote control unit.
Check AL+3.3V line and service it if defective.
No
Replace the remote control receiver(RS301)
or the remote control unit.
Ye s
Replace Digital Main CBA Unit.
When pressing each switches (SW351~SW355,
SW357) do the voltage of Pin(3) of CN202 increase?
Ye s
The key operation is not functioning.
FLOW CHART NO.1
Are the contact point and installation state of the key
switches (SW351~SW355, SW357) nor
mal?
Re-install the switches (SW351~SW355, SW357)
correctly or replace the poor switch.
Check the switches (SW351~SW355, SW357) and
their periphery, and service it if defective.
Ye s
Replace Digital Main CBA Unit.
No
No
No operation is possible from the remote control unit.
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