Stepping Motor Drive Circuit (Tx) - Panasonic KX-FP365CX Service Manual

6.4.6.

Stepping Motor Drive Circuit (TX)

1. Function
The stepping motor works for reception and copy.
2. Motor
During motor driving, pin 131 of ASIC IC1 becomes high level, IC401 10pin becomes low level, and Q402 turns ON. As a
result, +24V is supplied to the motor coil.
Stepping pulses are output from ASIC IC1 pins, 131, 125, 128~130, causing driver IC402 pins, 16~13 to drive the Motor Coil.
The motor coil is energized sequentially in 2 phase increments, which causes a 1-step rotation.
The timing chart is below.
Function
Copy
FAX Sending
Document Feed
Stand-by
Stepping Motor Drive Mode
Mode
Fine, Photo
Super Fine
Standard
Fine, Photo
Super Fine
———
———
Phase Pattern
1-2
1-2
1-2
1-2
1-2
1-2
All phases are currently off.
31
KX-FP365CX / KX-FM388CX
Speed
432 pps (t=1/432)
216 pps (t=1/216)
432 pps (t=1/432)
432 pps (t=1/432)
216 pps (t=1/216)
432 pps (t=1/432)
None