Hitachi RAS-E10H2 - Indoor;Outdoor Interface Circuit

Q141
L201
12V
IRR
VDD
Fig.2-1
Fig.3-1 Buzzer circuit
GND
VOUT
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
16130
BZ
Sound wave
Metal diaphragm
V
Pizoelectric element
V
Fig. 3-2 Buzzer Operation
4.
A
uto Sweep Motor Cir
cui
t
Fig.
4-1 sho
ws the
Au
to
sw
eep motor dr
iv
e circuit;
the signals sho
wn in Fig.4-2 are output from pin
15
-
18
of
microcomputer
.
As
the
microcomputer
’s
outputs
change
as
sho
wn
in
Fig.4-2,
the
coils
of
the
auto
sw
eep
motor
is
e
xcite
to
tu
rn
the
roto
r.
Ta
b
le 4-1 sho
ws the rotation angle of horiz
ontal air deflector
s.
Microcomputer
18
17
16
15
11
10
12
6
7
5
13
4
IC71
1
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 10Horizontal air deflectors
Fig.4-2 Microcomputer Output Signals
Fig.4-1
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-