FUNAI LH850-M32 Service Manual page 25

FLOW CHART NO.11
The key operation is not functioning.
Replace Digital Main CBA Unit.
FLOW CHART NO.12
No operation is possible from the remote control unit.
Yes
Yes
Yes
Replace Digital Main CBA Unit.
FLOW CHART NO.13
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?
Are the luminance signals outputted to Pin(27) of
CN401?
Are the chrominance signals outputted to Pin(29)
of CN401?
Are the component video(Y/Pb/Pr) signals outputted
to Pin(4, 6, 8) of CN404?
Are the RGB video signals outputted to Pin(26, 28, 29)
of CN404?
Are the composite video signals outputted to
Pin(2,12,22) of CN404?
Yes
Replace Digital Main CBA Unit or LCD Module
Assembly.
Yes
Yes
No
Re-install the switches (SW101, SW103-SW107)
correctly or replace the poor switch.
No
Check the switches (SW101, SW103-SW107)
and their periphery, and service it if defective.
No
Check AL+3.3V line and service it if defective.
No Replace the RS102 (remote control receiver) or
remote control unit.
No
Check the line between Pin(1) of RS102 (remote
control receiver) and Pin(13) of CN403, and service
it if defective.
Check the line between each pin of CN401 and
CN404 and input terminal and service it if defective.
No
Check the luminance signal line, and service it if
defective.
No Check the chrominance signal line, and service it if
defective.
No
Check the component video(Y/Pb/Pr) signal line,
and service it if defective.
No
Check the RGB video signal line, and service it if
defective.
No
Check the composite video signal line, and service it
if defective.
8-4 A0CF0TR