8-3
PL12.0ATR
[Video Signal Section]
No
Is the "L" pulse supplied to Pin(1) terminal of remote
control receiver (RS4051) when the infrared remote
control is activated?
Yes
Is the "L" pulse supplied to Pin(5) of CN4001?
Yes
Is approxi3.3V voltage supplied to Pin(3)
terminal of the remote control receiver (RS4051)?
No
FLOW CHART NO.2
Check AL+3.3V line and repair it if defective.
No
Replace the remote control receiver (RS4051)
or the remote control unit.
Check the line between Pin(1) of remote control
receiver (RS4051) and Pin(5) of CN4001.
Repair it if defective.
Yes
Replace Digital Main CBA Unit.
When touching each buttons, does the Pin(6) voltage
of CN4001 decrease?
The key operation is not functioning.
FLOW CHART NO.1
Yes
Yes
Replace Digital Main CBA Unit.
Replace IC4001
or Function CBA.
No
Check AL+3.3V line and
repair it if defective.
Is approxi3.3V voltage supplied to Pin(1)
of CN4001?
No
No operation is possible from the remote control unit. (Operation is possible from the unit.)
Picture does not appear normally.
FLOW CHART NO.3
Is approxi3.3V voltage supplied to Pin(13) of
CN631?
Digital Main CBA Unit or LCD Panel Assembly may
be defective.
Check and replace these parts.
No
Is approxi21V voltage supplied to
Pin(1, 2, 7, 8) of CN631?
See FLOW CHART NO.5 <P-ON+21V is not output.
[Power Supply Section]>
See FLOW CHART NO.7 <AL+3.3V is not output.
[Power Supply Section]>
No
Yes
Yes
