Hitachi RAS-18FH6 - DESCRIPTION OF MAIN CIRCUIT OPERATION; 4. Auto Sweep Motor Circuit

– 32 –
Micro computer pins
Step width : 10ms
Horizontal air deflectors
15
16
17
18
123456 78
Fig.4-2 Microcomputer Output Signals
Table 4-1 Auto sweep Motor Rotation
Mi
crocom
p
uter
18
17
16
15
11
10
12
6
7
5
13
4
I
C
71
1
12V
C
N4
Roto
r
Auto sweep motor for
horizontal air defectors
Fig.4-1
Rotation angle per step ) Time per step (ms.)
0.0882 10Horizontal air deflectors
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
EE
EE
E~
HH
HH
H 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.