Stepping Motor Drive Section - Panasonic KX-FL612CX Service Manual

KX-FL612CX / KX-FL612CX-S
7.7.

STEPPING MOTOR DRIVE SECTION

7.7.1. ENGINE MOTOR DRIVE CIRCUIT
1. Functions
This motor functions for main operations FAX reception and copy printing.
This feed recording paper synchronized for printing.
2. Motor operation
Excitation pulses is output from G/A (IC605) pins 83, 84, 85 and 86. Then stepping pulses are output from driver IC (IC609) pin
No 2, 7, 8 and 13, and drives the motor coil.
During motor driving, pin 90 of G/A IC605 becomes a low level.
As a result, a current of about 1A are supplied to the motor coil.
7.7.1.1. TIMING CHART
DRIVE MODE
FUNCTION
PRINT
MODE PHASE PATTERN
- 2 phase
166
SPEED CURRENT
951pps 1A