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Fig. 1
-
1
Q111
R114
Q113
Q112
R
1
1
1
R115
C
1
1
3
C
1
1
6
R
1
1
2
Z
D
1
1
1
R
1
1
6
R
1
1
7
C
1
1
1
Q116
R
1
2
4
R121
R
1
2
2
R
1
2
3
Q115
C
1
1
2
I
C111
2
3
8
5
6
4
7
1
L
751
R
631
C
1
3
2
Z
D
1
3
1
M
CN10
1
2
3
4
5
6
C131
C751
C621
R
751
Mo
t
o
r
I
ndoo
r Fan
FM Rotation No.
Feedback
Indoor Fan
PWM Output
C
1
0
5
+
−
I
N
OUT
GND
D121
−
0V
+
Z
D
1
2
1
R
1
1
8
C
1
0
3
35V
I
CP2
C
1
1
5
L111
C
1
1
4
D
1
1
1
R
1
1
9
I
CP1
−
−
+
C
1
0
2
+
12V
5V
C
1
2
1
I
C121
C
1
2
3
C
1
2
2
XA−6P−Top
14
40
Power to operate indoor unit (DC35V) is generated at the power supply in outdoor unit and it is sent to indoor unit
through the connecting cord C and D.
Then, DC 12V (12V line) is generated using DC/DC converter from the voltage sent from outdoor unit, as the
control voltage of 12V is required to drive the suction deflector motor and others.
Furthermore, 5V (5V line), which is necessary to drive the microcomputer and to control the fan motor, is generated
using three-terminal regulator IC121.
1. Power circuit
MODEL RAS-50WX8, RAS-D18EX3
DESCRIPTION OF MAIN CIRCUIT OPERATION
0V
35V