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B. Lens Motor Drive Circuit
The lens motor (M3) is a stepping motor and rotates in response to drive power
LNSC-A and LNSC-B and pulse signals LNSA, LNSA*, LNSB, and LNSB*.
1. Keeping the Lens Motor Stationary
All LNSA, LNSA*, LNSB, and LNSB* are caused to go OFF, thereby stopping and
retaining the motor stationary.
2. Driving the Lens Motor
Pulses are applied to each phase in sequence to rotate the motor.
Figure 3-202
COPYRIGHT
©
1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 3 EXPOSURE SYSTEM
3-3
LNSC-B
LNSC-A
LNSA
LNSA*
LNSB
LNSB*
J306
- 1
34V
- 4
- 5
- 6
- 2
- 3
M3
DC controller PCB
Microprocessor
(Q301)
Lens motor