Hitachi RAS-80YH5A - Page 54

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5. Auto Sweep Motor Circuit
Micro computer
18
17
16
15
1
2
3
4
8
16
IC501
12V
CN12
Auto sweep motor for
horizontal air deflectors
Rotor
0V
15
14
13
1
2
3
4
5
Fig. 5-1 Auto Sweep Motor Circuit (Horizontal air deflectors)
● Fig. 5-1 shows the Auto sweep motor drive circuit; the signals shown in Fig. 5-2 are output from pins
– of the micro computer.
Micro computer pins
Step width
Horizontal air
deflectors: 10ms.
12345678
Horizontal air deflectors
15
16
17
18
Fig. 5-2 Micro computer Output Signals
● As the micro computer’s outputs change as shown in Fig. 5-2, the core of the auto sweep motor is excited
to turn the rotor. Table 5-1 shows the rotation angle of horizontal air deflectors.
Rotation angle per step (° )
0.0879
Time per step (ms)
10Horizontal air deflectors
Table 5-1 Auto sweep Motor Rotation
15 18