6-6
L0370TS
When pressing each switches (SW101,SW102,
SW103,SW104,SW105,SW107,SW116) do the
voltage of each pin of CN102A (shown below)
increase?
SW101,102,103,104,105,107 : CN102A PIN 6
SW116 : CN102A PIN 7
Yes
No
The key operation is not functioning.
FLOW CHART NO.21
Are the contact point and installation state of the key
switches (SW101,SW102,SW103,SW104,SW105,
SW107,SW116) normal?
Re-install the switches (SW101,SW102,SW103,
SW104,SW105,SW107,SW116) correctly or replace
the poor switch.
No
Check the switches (SW101,SW102,SW103,SW104,
SW105,SW107,SW116) and their periphery, and
service it if defective.
Yes
Replace LCD MAIN CBA UNIT.
No
Is the "L" pulse sent out Pin(1) terminal of receiver
(RCV101) when the infrared remote control is
activated?
Check the line between Pin(1) terminal of receiver
(RCV101) and Pin(1) of CN102A , and service
it if defective.
Yes
Is the "L" pulse supplied to the Pin(1) of CN102A?
Yes
Is 3.3 voltage supplied to Pin(3) terminal of the
infrared remote control receiver (RCV101)?
Yes
No
No operation is possible from the remote control unit.
FLOW CHART NO.22
Operation is possible from the remote control unit.
Check P-ON+3.3V(D) line and service it if defective.
No
Replace the infrared remote control receiver
(RCV101) or the remote control unit.
Yes
Replace LCD MAIN CBA UNIT.