SERVICE MANUAL - Encompass Imaging

[ Video Signal Section ]
FLOW CHART NO.1
The key operation is not functioning.
Are the contact point and installation state of the key
switches (SW104~SW109) normal?
Yes
When pressing each switches (SW104~SW109)
do the voltage of Pin(29) of CN302 increase?
Yes
Replace Digital Main CBA Unit.
FLOW CHART NO.2
No operation is possible from the remote control unit.
Operation is possible from the remote control unit.
Is 3.3V voltage supplied to Pin(2) terminal of the
remote control receiver (RS101)?
Yes
Is the "L" pulse sent out Pin(1) terminal of remote
control receiver (RS101) when the infrared remote
control is activated?
Yes
Is the "L" pulse supplied to Pin(25) of CN301?
Yes
Replace Digital Main CBA Unit.
FLOW CHART NO.3
Picture does not appear normally.(Video input)
Are the video signal inputted to Pin(4) of CN302?
Yes
Replace Digital Main CBA Unit or LCD Module
Assembly.
No
No
No
No
No
No
Re-install the switches (SW104~SW109) correctly
or replace the poor switch.
Check the switches (SW104~SW109) and their
periphery, and service it if defective.
Check AL+3.3V line and service it if defective.
Replace the remote control receiver(RS101)
or the remote control unit.
Check the line between Pin(1) terminal of remote
control receiver(RS101) and Pin(25) of CN301,
and service it if defective.
Check the line between Pin(4) of CN302 and
JK752, and service it if defective.
8-5 A91N3TR