Specifications

3.5 STEPPER MOTOR CONTROL CIRCUIT
The scanner motor, the lens motor, and the 4th/5th mirror motor are all
stepper motors. The scanner motor operates on +30 volts. Both the lens
motor and the 4th/5th mirror motor operate on +24 volts. The stators of these
stepper motors have four coils (labeled A, B, A, B above), and the rotor is
made of permanent magnets. Pulse signals energize the four coils as shown
in the above illustration. The rotors of these motors turn in discrete steps, and
48 steps are required for one revolution.
CN122-3
CN122-4
CN122-5
CN102-7
CN102-8
CN102-9
CN102-10
CN102-11
CN102-12
CN806-3
CN806-2
CN802-1
CN824-3
CN824-2
CN824-1
CN826-3
CN826-2
CN826-1
[0] GND
[ 5]
[0] GND
[5] VC
[ 5] Lens H.P.
[5] VC
[0] GND
[5] VC
VM [30]
A [ 30 0/30]
VM [30]
VA[24]
VA[24]
CN105-1
CN105-2
CN105-3
CN105-4
CN105-5
CN105-6
CN102-1
CN102-2
CN102-3
CN102-4
CN102-5
CN102-6
CN106-1
CN106-2
CN106-3
CN106-4
CN106-5
CN106-6
Main Board (PCB1)
Scanner
H.P. Sensor
(S1)
Lens
H.P. Sensor
(S2)
4th/5th
Mirror
Motor
(M4)
Lens
Motor
(M3)
Scanner
Motor
(M2)
(S3)
4th/5th
Mirror
H.P. Sensor
CN825
6
5
3
2
1
4
1
2
3
4
5
6
Scanner H.P.
A [ 30 0/30]
B [ 30 0/30]
B [ 30 0/30]
A [ 24 0/24]
A [ 24 0/24]
B [ 24 0/24]
B [ 24 0/24]
A [ 24 0/24]
A [ 24 0/24]
B [ 24 0/24]
B [ 24 0/24]
Mirror H.P.
[ 5] 4th/5th
VA[24]
VA[24]
Step 1 2 3 4 5 6 7 8
A
B
ON
OFF
ON
OFF
ON
OFF
ON
OFF
A
B
1
6
Com.
Com.
2 3 4
5
A
B
A
B
1 December 1990
2-14