8-4
A91H1TR
[ Video Signal Section ]
No
Is the "L" pulse sent out Pin(1) terminal of remote
control receiver (RS1301) when the infrared remote
control is activated?
Check the line between Pin(1) terminal of remote
control receiver(RS1301) and Pin(1) of CN202,
and service it if defective.
Yes
Is the "L" pulse supplied to Pin(1) of CN202?
Yes
Is 3.3V voltage supplied to Pin(2) terminal of the
remote control receiver (RS1301)?
No
FLOW CHART NO.2
Operation is possible from the remote control unit.
Check AL+3.3V line and service it if defective.
No
Replace the remote control receiver(RS1301)
or the remote control unit.
Yes
Replace Digital Main CBA Unit.
When pressing each switches (SW1351~SW1355,
SW1357) do the voltage of Pin(3) of CN202 increase?
Yes
The key operation is not functioning.
FLOW CHART NO.1
Are the contact point and installation state of the key
switches (SW1351~SW1355, SW1357) normal?
Re-install the switches (SW1351~SW1355, SW1357)
correctly or replace the poor switch.
Check the switches (SW1351~SW1355, SW1357)
and their periphery, and service it if defective.
Yes
Replace Digital Main CBA Unit.
No
No
No operation is possible from the remote control unit.
Summary of Contents for 42MF439B/F7
Page 14: ...4 2 A91H1DC 2 Rear Cabinet S 1 1 Stand Assembly S 2 S 3 S 2 S 2 S 2 S 4 S 5 Fig D1 ...
Page 40: ...10 4 A91H1SCJP2 Jack Power 2 3 Schematic Diagram ...
Page 41: ...10 5 A91H1SCJP3 Jack Power 3 3 Schematic Diagram ...
Page 45: ...10 9 A91H1SCIR IR Sensor Junction Schematic Diagram ...
