Sylvania LC427SSX Service Manual page 27

[ Video Signal Section ]
FLOW CHART NO.1
The key operation is not functioning.
Yes
Yes
Replace Digital Main CBA Unit.
FLOW CHART NO.2
No operation is possible from the remote control unit.
Yes
Yes
Yes
Replace Digital Main CBA Unit.
No
Re-install the switches (SW1351~SW1355, SW1357)
correctly or replace the poor switch.
No
Check the switches (SW1351~SW1355, SW1357)
and their periphery, and service it if defective.
No
Check AL+3.3V line and service it if defective.
No
Replace the remote control receiver(RS1301)
or the remote control unit.
No
Check the line between Pin(1) terminal of remote
control receiver(RS1301) and Pin(1) of CN202,
and service it if defective.
8-4 A91H1TR