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Service Guide OL830
Chapter 4 Failure & Repair Analysis
4.7 SELF-TESTS
4.7.01 General Information
The following diagnostics are available for the printer.
Continuous Print Test
Print Fonts
Menu Print
Serial Interface Loop Test
Engine Test
4.7.02 Continuous Print Test
During the Continuous Print Test, the printer will print a rolling ASCII character set. This test is
helpful in determining the relative print quality of an entire page.
4.7.03 Print Fonts
Although Print Fonts is not usually considered a diagnostic, it is quite useful in determining if the
printer is recognizing resident fonts, font cards, and DLL fonts.
4.7.04 Menu Print
Menu Print should be used to determine the status of the various Menu Items. This information is
stored in the EEPROM.
4.7.05 Serial Interface Loop Test
The Serial Interface Loop Test is used to determine the status of the RS232-C serial interface and
multi-port board. A loopback connector
must be attached to the interface connector before running
this test.
4.7.06 Engine Test
The Engine Test allows the technician to operate the printer with the main controller board and
operator panel detached. This can be very helpful when trying to isolate defective circuit boards.
To perform the engine test, follow this procedure.
1. Remove the upper cover.
2. Detach the operator panel and main controller board.
3. Make sure that the paper cassette is installed.
4. Override the cover interlock switch.
5. Power ON the the printer while pressing Switch 1 on the engine controller board.
6. The printer will continually print pages of horizontal ruled lines.
7. To stop the test, press Switch 1.
The printer may print a few more pages before stopping the test.
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