Hitachi RAS-10JH1 Service Manual page 42

4. Snap Motor Circuit (Horizontal Air Deflector, Ventilation Damper)
Ｒ ７ ３ ５
２ ２
φ ４
Ｍ ｉ ｃ ｒ ｏ ｃ ｏ ｍ ｐ ｕ ｔ ｅ ｒ
２ １
φ ３
２ ０
φ ２
１ ９
φ １
１ ８
φ ４
１ ７
φ ３
１ ６
φ ２
１ ５
φ １
Fig. 4-1 shows the Auto sweep motor drive circuit; the signals shown in Fig.4-2 are output from pin 15 - 22 of
microcomputer.
Micro computer pins
Horizontal air deflectors
15 19
16 20
17 21
18 22
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 Deflector, Ventilation Damper.
Table 4-1 Auto sweep Motor Rotation
Horizontal air deflectors
Ventilation Damper
Ｄ ７ ３ ３
Ｑ ７ ３ ３
Ｉ Ｃ ７ １ １
０ Ｖ
７ １ ０
６ １ １
５ １ ２
４ １ ３
３ １ ４
２ １ ５
１ １ ６
1 2
φ
( 1)
φ
( 2)
φ
( 3)
φ
( 4)
Fig.4-2 Microcomputer Output Signals
Rotation angle per step ( ˚ )
１ ２ Ｖ
Fig.4-1
Step width : 10ms
3 4 5
0.0882
- 40 -
Ｃ Ｎ ５
１
２
Ｍ
３
４
５
Ｖ ｅ ｎ ｔ ｉ ｌ ａ ｔ ｉ ｏ ｎ ｄ ａ ｍ ｐ ｅ ｒ ｍ ｏ ｔ ｏ ｒ
Ｃ Ｎ ４
１
２
Ｍ
３
４
５
Ｓ ｔ ｅ ｐ ｐ ｉ ｎ ｇ ｍ ｏ ｔ ｏ ｒ ｆ ｏ ｒ ａ ｕ ｔ ｏ ｓ ｗ ｅ ｅ ｐ
6 7 8
Time per step (ms.)
10