Space And Line Feed (Sp/Lf) Motor Control; Line Feed Motor Control - Oki Microline 520 Service Handbook

2.1.05

Space and Line Feed (SP/LF) Motor Control

The LSI (Location 04B: MSM79V035) generates the space motor and the line feed motor
control signals according to commands received from the MPU. These signals are sent to the
SP/LF motor driver.

Line Feed Motor Control

The SP/LF motor driver (Location 5A: MHM2025) drives the line feed motor in two-phase
bipolar, based on the phase changeover data output from the LSI.
The serial data from the LSI (04B: MSM79V035) is processed by a register contained in the
SP/LF motor driver to measure the overdrive time and to change the phase.
Principles of Operation 2 - 10 Microline 520/521 Service Handbook
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