Hitachi RAC-10G5, Service Manual, Page: 47 / 62

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7. Auto Sweep Motor Circuit
Fig. 7-1 Auto Sweep Motor Circuit (Horizontal air defl ectors)
●
Fig. 7-1 shows the Auto sweep motor drive circuit; the signals shown in Fig. 7-2 are output from pins
48
–
51
of the micro computer.
Fig. 7-2 Micro computer Output Signals
●
As the micro computer’s outputs change as shown in Fig. 7-2, the core of the auto sweep motor is
excited to turn the rotor. Table 7-1 shows the rotation angle of horizontal air defl ectors.
Rotation angle per step (° )
0.0879
7.47
Time per step (ms)
10
850
Horizontal air defl ectors motor
Defl ectors
Table 7-1 Auto sweep Motor Rotation