FILE NO. SVM-04022
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9-6-1. How to check the P.C. board
(1) Operating precautions
1) When removing the front panel or the P.C. board,
be sure to shut off the power supply.
2) When removing the P.C. board, hold the edge of
the P.C. board and do not apply force to the
parts.
3) When connecting or disconnecting the
connectors on the P.C. board, hold the Whole
housing.
Do not pull at the lead wire.
(2) Inspection procedures
1) When a P.C. board is judged to be defective,
check for disconnection, burning, or discolora-
tion of the copper foil pattern or this P.C. board.
2) The P.C. board consists of the following 2 parts
a. Main P.C. board part:
Power relay, indoor fan motor drive circuit and
control circuit, C.P.U. and peripheral circuits,
buzzer drive circuit and buzzer.
b. Infrared rays receive and indication parts:
Infrared rays receiver unit and LED.
