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KX-FLB758RU
7.5.3.
CR (Carriage) MOTOR DRIVE CIRCUIT
1. Functions
This motor functions for main operations including FAX transmission, FB copy and PC scan.
This feed document paper synchronized for reading.
2. Motor operation
During motor driving, pin P4 of ASIC IC604 becomes a high level, and Q605, Q600 turns ON.
As a result, +24V is supplied to the motor coil.
Stepping pulses are output from ASIC IC604 pins, U6, Y7, W7, V7, causing driver IC500 pins,
16 ~ 13 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 0.042mm of document paper.
7.5.3.1.
TIMING CHART
178
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Troubleshooting
