2. This circuit prevents over-driving the fan motor by cutting off power applied to the fan motor in the lock of fan motor by
sensing the operation RPM of the fan motor.
- 29 -
Part part
MOTOR OFF 2V or less 0V
MOTOR ON 13V~15V 0V
a b
2.2 Cooling motor driving circuit (machine room)
by cutting off power supplied to ISs inside of the fan motor in the fan motor OFF.
1. This circuit makes standby power 0
part part part
MOTOR OFF 2V or less 0V 5V
MOTOR ON 13V~15V 0V 2V~3V
a b
c
1
3
6
4
4
5
C-FAN
1/2W
(PPG)
R40
KTB1151
R46
Q4
3.9KJ
KTC3198
4.7KJ
FR107
Q5
P11
2KJ
/25V
D8
R44
R41
R45
CE12
32
1.5KJ
35
220uF
102
D9
P14
FR107
CC20*
CC19*
10KJ
R43
1mH
4.7KJ
L4
RJ1*
(INT1)
R42*
330J
223
I C 1
(MICOM)
CON4
A
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