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EXPLATION FOR MICOM CIRCUIT
1-9. Fan motor
driving
circuit
(freezing
room,
M/C room)
1. This circuit performs function to make standby power'O' by cutting off power supplied to ICs inside of the fan motor in the
fan motor OFF.
2. This is a circuit to perform a temporarychange of speed for the fan motor and applies DC voltage up to 7.5V ~ 16Vto
motor.
3. This circuit performs function not to drive the fan motor further by cutting off power applied to the fan motor in the lock of
fan motor by sensing the operation RPM of the fan motor.
1)GR-L207ERA,
GRoL247ERA
@,@parf
Motor OFF
5V
Motor ON
2 - 3V
(_)pa_
(_)pa_
2V orless
2V orless
12 ~ 14V
8 ~ 16V
(_ (_part
ov
ov
ICI
(HICOH)
P5€
C-FAN PVM
P51
C-FAN LOCK
P53
F-FAN PVM
PS0
F-FAN
LQCK
53
R37
330
R34_
4.7K
R35
3,9K
R36
KTA170S
620
,
Q5
2
CE6
" D20
_'FRI02
220uF ;
/25v -
R39
50
z<
ZD4 A_
._w
1N4735
6.2V
R€4
33O
Q6
KTA170_
R41 _
4.7K
R45
R42
620
d
5_
3.9K
Q7
2
R43
IQ_C3t
98 Z '
49
tN4735
6.2V
CC1B
102
L-i
- DZ2
CE7
22Our?
CC19
_' m102
/25V
T
223
1
2'_
.TK
.J-
CC20
102
CON7
7
8
9
11
Io
-41 -
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