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KX-FLB758RU
7.5.
STEPPING MOTOR DRIVE SECTION
7.5.1.
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 ASIC (IC604) pins U8, W9 Y9 and Y12. Then stepping pulses are output from driver IC (IC1)
pin No 9, 11, 15 and 19, and drives the motor coil.
During motor driving, pin N1 and pin R2 of ASIC IC604 becomes a low level.
As a result, a current of about 1A are supplied to the motor coil.
7.5.1.1.
TIMING CHART
DRIVE MODE
FUNCTION
PRINT
MODE
PHASE PATTERN
-
2 phase
174
SPEED
CURERENT
743pps (t=1/743)
1A
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Troubleshooting
