Oki OKIFAX 5750 Maintenance Manual page 453

Okifax 5750/5950 facsimile transceiver

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Scanner Motor Control

The overall control circuit diagram is shown below.

NMPT1, 2, 3, 4

Rotation of the scanner motor is controlled by the INA, INB,ENA and ENB signals output from

the LSI chip (IOGA5) on the MCNT board. MNPT 1, 2, 3, and 4 signals change the reference

voltage signal REF to alter the current values of scanner drive signals OutA and OutA-N,

controlling the motor speed.

Waveforms of motor drive signals INA, INB, ENA and ENB are as follows:

(1) For 3200 pps

(2) Except 3200 pps

41285901TH Rev.3

Troubleshooting