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Service Guide ML390/391
Chapter 2 Principles of Operation
2.1 PRINTER OVERVIEW
2.1.01 General Information
This section describes the operation of the printer. It is divided into three parts.
· Circuit Board Description
The major components of the main controller board are described and functional descriptions of the
operator panel board and power supply are provided. Some signal names are listed with a (-N) after them.
This means that the signal is "active" or ON when it is a logic "0". This is also indicated by a line over the
signal name (I-PRIME).
· Electrical Operation
This section views the printer functions from an electrical perspective.
· Mechanical Operation
This section views the printer functions from a mechanical perspective.
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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