How To Check Simply The Main Parts; How To Check The P.c. Board (Indoor Unit) - Toshiba RAS-M10NKV-E Service Manual

8-8. How to Check Simply the Main
Parts
8-8-1. How to Check the P.C. Board
(Indoor Unit)
(1) Operating precautions
1) When removing the front panel or the P .C.
board, be sure to shut off the power supply
breaker.
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 discol-
oration 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 :
DC power supply circuit (5V, 12V, 35V),
Indoor fan motor control circuit, CPU and
peripheral circuits, buzzer, and Driving
circuit of top/bottom louvers
b. Indication unit of infrared ray receiving
Infrared ray receiving circuit, LED :
To check defect of the P.C. board, follow the
procedure described below.
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FILE NO. SVM-05019