OKI ML521 Manual do Utilizador descarregar pdf (Página 209)

Page: 144

Service Guide ML520/521

Chapter 4 Failure & Repair Analysis

4.8.02 Rolling ASCII Test

General Information

The rolling ASCII test is a continuous printout of all 96 ASCII characters.

Use this test to check the following items.

1. Print Quality

Across the entire length of a line

Down the entire page

2. Line Spacing

3. Left Margin Alignment

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

Before running this test, make sure that continuous feed paper is loaded.

If you are running this test on a Microline 521, use wide paper or have the page width set for 8.5" x 11" in

the printer menu.

Running the test without paper loaded or having the wrong width paper loaded will allow the printhead to

print on the platen. This will dirty the platen, cause excessive wear on the ribbon, and may damage the

platen, ribbon, and printhead.

Procedure

Follow these steps to print the Rolling ASCII Test.

1. Load the correct size continuous feed paper.

2. Power off the printer.

3. Press and hold the QUIET switch while powering on the printer. You must hold the QUIET switch until

the test starts to print.

4. The test will continue to print until you press the SEL switch or run out of paper.

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OKI ML521 Manual do Utilizador Página 209