User's Manual

Troubleshooting and Diagnostics
Chapter
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7
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6820 Series 80-Column Printer User’s Manual
Detailed Printer Self -Test
Self-test is user-selectable, verifies printer functions, and provides reporting
of printer d iagnostics. It performs a series of internal diagnostics and prints
the results. When self-test begins, the beeper sounds for half a second and
all L EDs turn on for half a second.
Initiating Self-Test
Self-test is initiated by simultaneously pressing both the LINE FEED and
SET PAGE buttons on the control panel, while the printer is idle or
asleep.
Terminating Self-Test
Self-test can be terminated manually, during the test, by s imultaneously
pressing both the LINE FEED and SET PAGE buttons.
Self-Test Report
Note: This method is recommended for determining printer functionality.
A self-test is equivalent to a warm start. Both are performed when you si-
multaneously press the FORM FEED and SET PAGE buttons on the
control panel for a few seconds. Release these buttons when the printer
beeps and all indicators are lit. If the buttons are held too long, the self-test
will not happen and the printer will form-feed one page.
As the self-test progresses, the indicator lights change. Internal tests are
performed and a 2-page report is printed. This report provides helpful in-
formation in diagnosing and troubleshooting printer problems. When the
self-test is performed, the following actions occur:
Note: t o abort the self-test can by pressing a button while the report is printing.
S All LEDs are turned on to verify the lights work
S A 600 ms beep is emitted to verify the beeper works
S LEDs flash individually to show progress during internal tests
S Current voltage and ambient temperature are obtained
S Validity of diagnostic b lock program is checked
S Validity of BootBlock program is checked
S Validity of control program is checked
S Validity of loaded fonts is checked
S LEDs turn off
S Self-test report is printed
Printer capability is diagnosed by printing the report. Device errors are dis-
played on the LEDs and emitted by the beeper. The printer then does a
warm reset (soft reboot) upon error or completion of the self-test report.