Toshiba RAS-M18SAH-E Service Manual page 47

9-4-1. 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 connec-
tors on the P .C. board, hold the whole housing.
Do not pull at the lead wire.
Table 9-4-1 Approximate value of the sensor (thermistor) resistance (TA, TC, TE)
Temperature
Sensor
Thermo. sensor
9-4-2. How to Reduce the Operation Time of
the Anti-Restart Timer
• Attach the diode (1S1555 or equivalent) to the rivet
inside the unit through holes on the rear of the
wireless remote control unit.
• Push the START/STOP button to start operation
with the diode attached.
(2) Inspection procedures
0°C 10°C
35,8 20,7
– 48 –
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 cir-
cuits, buzzer drive circuit and buzzer.
b. Infrared rays receive and indication
parts:
Infrared rays receive unit and LED.
20°C
12,6
Wireless remote control
Fig. 9-4-1
(= kΩ)
25°C 30°C
10,0 7,92
Timer short diode