Hitachi RAS-32CNH1 Serviceanleitung Seite 83

4. Auto Sweep Motor Circuit
12V
12V
Auto sweep motor for
horizontal air deflectors
eee eee ee ee eee,
R712
--1 10701
Micro computer
Fig. 4-1 Auto Sweep Motor Circuit (Horizontal air deflectors)
@ Fig.4-1 shows the Auto sweep motor drive circuit; the signals shown in Fig.4-2 are output from pins -
of the. micro computer.
Horizontal air
deflectors: 10ms.
Step width
Fig. 4-2 Micro computer Output Signals
@ As the micro computer's outputs change as shown in Fig.4-2, the core of the auto sweep motor is excited
to turn the rotor. Table 4-1 shows the rotation angie of horizontal air defiectors.
Table 4-1 Auto sweep Motor Rotation
ee Rotaiton angle per step (° ) Time per step (ms.)
Horizontal air deflectors 0.0879
-98-