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Service Guide ML590/ML591
Chapter 4 Failure & Repair Analysis
4.8.03 Font Test
General Information
The font test is a one page sample printout of each available typeface.
10 cpi Letter Quality Courier
10 cpi Letter Quality Roman
10 cpi Letter Quality Swiss
10 cpi Letter Quality Orator
10 cpi Letter Quality Gothic
10 cpi Letter Quality Prestige
10 cpi Utility
18 point Letter Quality Swiss
12 cpi Letter Quality Superscript/Subscript
At the top of the test is the printer type (1), emulation (2), country (3), and firmware revision level
(4). This information is often required while performing service or when contacting Okidata. Have
this test available during your service call.
CAUTION
Running the test without paper loaded will allow the printhead to print on the platen. This will dirty
the platen, cause excessive wear of the ribbon, and may damage the platen, ribbon, and
printhead.
Procedure
Follow these steps to print the font test.
1. Load the paper.
2. Power off the printer.
3. Press and hold the LF switch while powering on the printer. You must hold the LF switch until
the test starts to print.
4. The one page test will print, then stop.
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)