Service manual

8-17 FL11.0CTR
[Video Signal Section]
No
Is the "L" pulse sent out Pin(1) terminal of remote
control receiver (RS4051
) when the infrared remote
control is activated?
Ye s
Is the "L" pulse supplied to Pin(2) of CN4052?
Ye s
Is approximately +3.3V voltage supplied to Pin(3)
terminal of the remote control receiver (RS4051)?
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 IR Sensor CBA Unit
or the remote control unit.
Replace the IR Sensor CBA Unit.
Ye s
Replace Digital Main CBA Unit.
When pressing each switches (SW4001~SW4007)
do the voltage of Pin(6) of CN4052 decrease?
The key operation is not functioning.
FLOW CHART NO.1
Ye s
Replace Digital Main CBA Unit.
Replace the Function CBA Unit.
No
No operation is possible from the remote control unit.
Picture does not appear normally.
FLOW CHART NO.3
Is approximately +11V voltage supplied to Pin(6, 7)
of CN601?
Is
approximately +
21V voltage supplied to Pin(3, 4) of
CN601?
CL3006, Digital Main CBA Unit or LCD Module
Assembly may be defective.
Check and replace these parts.
No
No
Ye s
Is approximately +5V voltage supp
lied to Pin(9) of
CN601?
See FLOW CHART NO.7 <AL+5V is not output.
[Power Supply Section]>
See FLOW CHART NO.5 <P-ON+21V is not output.
[Power Supply Section]>
See FLOW CHART NO.6 <AMP+11V is not output.
[Power Supply Section]>
No
Ye s
Ye s