Hitachi RAK-35RPD Service Manual page 59

12. Stepping motor drive circuit
Microcomputer
Vertical vane, left
Vertical vane, left
Vertical vane, left
Vertical vane, left
Lateral vane
Lateral vane
Lateral vane
Lateral vane
[Connector circuit waveform while the motor runs]
Voltage waveforms of different phases as viewed from
the OV line while the motor rotor is turning counterclockwise
as viewed from the shaft side
4 terminal
3 terminal
2 terminal
1 terminal
・Each stepping motor runs as excited in 1 or 2 phases at 100 PPS or 200 PPS.
・The excitation pattern passes the microcomputer and then the driver IC and excites the coil of each stepping motor.
・Some models not need to install the horizontal sweep motor.
61
60
59
58
33
34
35
36
5 ms. or 10 ms.
Fig. 12-2
Fig. 12-1
59
Horizontal sweep motor
Vertical sweep motor