Panasonic KX-MB771GR Service Manual page 33

6.7.2.2. FB (FLAT BED) MOTOR DRIVE CIRCUIT
1. Functions
This motor functions for main operations including FAX transmission, FB copy and PC scan.
This motor feeds CIS unit with synchronizing for reading.
2. Motor operation
During motor driving, pin A8 of IC 300 become low level, then motor driver IC502 is activated.
Stepping pulses are output from IC300 pins A9, B9, C9,A10, B10, and C10, causing driver IC502 pin 3, 7, 9 and 13 to drive
the motor coil.
A 1-step rotation of this motor feeds 0.021mm of CIS unit.
3. Circuit Diagram
6.7.2.3. ADF (AUTO DOCUMENT FEEDER) MOTOR DRIVE CIRCUIT (ADF EQUIPPED
MODEL ONLY)
1. Functions
This motor functions for main operations including FAX transmission, ADF copy and PC scan.
This motor feeds document which are set to ADF with synchronizing for reading.
2. Motor operation
During motor driving, pin D9 of IC 300 become low level, then motor driver IC700 is activated.
Stepping pulses are output from IC300 pins A9, B9, C9, A10, B10, and C10, causing driver IC700 pin 3, 7, 9 and 13 to drive
the motor coil.
A 1-step rotation of this motor feeds 0.042mm of document.
3. Circuit Diagram
33
KX-MB771GR