Panasonic KX-FP101AL Service Manual page 136

KX-FP101AL
6.4.5. STEPPING MOTOR DRIVE CIRCUIT
1. Function
The stepping motor works for both transmission and reception.
2. Motor
During motor driving, pin 163 of ASIC IC501 becomes a high level, and Q515 turns ON. As a result, +24V is supplied to the
motor coil.
Stepping pulses are output from ASIC IC501 pins, 157, 160~162, causing driver IC506 pins, 15~12 to drive the Motor Coil. The
motor coil is energized sequentially in 2 phase increments, which causes a 1-step rotation. A 1-step rotation feeds 0.13 mm of
recording paper or document paper.
The timing chart is shown below.
Stepping Motor Drive Mode
Function Mode
Copy Fine
FAX Standard
Fine or Half tone
Paper Feed ———
Stand-by ———
Phase Pattern
1-2 216 pps
2-2 216 pps
1-2 216 pps
2-2 216 pps
All phases are None
currently off.
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Speed