Line Feed Motor Control - Oki ML520 Service Manual
Oki dot matrix printers service guide ml520, ml521
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Also See for ML520:
- Quick start (4 pages) ,
- Specifications (2 pages) ,
- User manual (226 pages)
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Page: 33
Service Guide ML520/521
Chapter 2 Principles of Operation
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.
Copyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business
Partner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
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Troubleshooting
