Q141
L201
12V
IRR
VDD
Fig.2-1
Fig.3-1 Buzzer circuit
GND
V
OUT
C212
C211
R212
0V
0V
0V
R211
0V
ZD141
R141
R611
C611
0V
RECEIVER I/P
Microcomputer
13
BZ1
R721
12V
IC711
Microcomputer
Buzzer output
16
1
30
BZ
Sound wave
Metal diaphragm
V
Pizoelectric element
V
Fig. 3-2 Buzzer Operation
4. Auto Sweep Motor Circuit
Fig. 4-1 shows the Auto sweep motor drive circuit; the signals shown in Fig.4-2 are output from pin 15 - 18 of
microcomputer.
As the microcomputer’s outputs change as shown in Fig.4-2, the coils of the auto sweep motor is excite to turn the
rotor. Table 4-1 shows the rotation angle of horizontal air deflectors.
Microcomputer
18
17
16
15
11
10
12
6
7
5
13
4
IC711
12V
CN4
Rotor
Auto sweep motor for
horizontal air defectors
Micro computer pins
Step width : 10ms
Horizontal air deflectors
15
16
17
18
1
2
3
4
5
6
7
8
Table 4-1 Auto sweep Motor Rotation
Rotation angle per step (˚ )
Time per step (ms.)
0.0882
10
Horizontal air deflectors
Fig.4-2 Microcomputer Output Signals
Fig.4-1
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