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Service Guide ML590/ML591
Chapter 1 Product Specifications
1.6.18 Print Method
Printhead Type
General Information
Impact: Dot Matrix
24 pin printhead
.0079 inch (.20 millimeter) diameter pins
Overheat Protection
When printhead temperature exceeds 110 degrees Celsius, the printer stops
bi-directional printing. Uni-directional printing begins.
If the temperature exceeds 115 degrees Celsius, printing stops.
Printing will resume when the printhead temperature drops below 115 degrees Celsius.
Note:
Refer to Section Two for more information on printhead operation.
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)