Lens Motor Drive Circuit; Keeping The Lens Motor Stationary; Driving The Lens Motor - Canon NP6218 Service Manual

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.
Microprocessor
(Q301)
COPYRIGHT © 1997 CANON INC.
DC controller PCB
Figure 3-202
CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 3 EXPOSURE SYSTEM
34V
J306
- 1
- 4
- 5
- 6
- 2
- 3
LNSC-B
LNSC-A
LNSA
LNSA*
LNSB
M3
LNSB*
Lens motor
3-3