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Phaser 8400/8500/8550/8560 Color Printer Service Manual 4-5
General Troubleshooting
Service Diagnostic Control Panel Button Descriptions
Service Diagnostics Mode Menu
This mode can be entered from the Hidden Service Menu. All diagnostics are
available in this mode.
The printer reboots after entering or exiting all diagnostic modes. The printer
will keep the printer thermals hot during diagnostics to avoid unnecessary
cleaning cycles. If a diagnostic test runs into a problem while initializing the
heaters a message will display, “Test Fault, can’t warm up - press any button”,
you can still continue to run diagnostics under this condition.
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If the heaters are On while entering diagnostics, they will remain On while
diagnostics are being run. If the heaters are Off while entering
diagnostics, they will remain Off. Utilize the Exercise Heaters function if it
is necessary to turn On/Off the heaters.
Button Function
Back Returns to the prior higher level menu structure, if available. Cancels the
display of test results on the Control Panel.
If help text is displayed on the Control Panel, pressing BACK will restore
the current menu item and remove the help text.
Cancel Cancels certain functions of the printer.
Help Provides help information, if available.
Press any key to advance through the help text.
Up Scrolls up one menu item within a menu list. This control does not
‘wrap’.
Used to increment data in tests requiring user input.
Down Scrolls down one menu item within test results.
This control does not ‘wrap’.
OK Enters the highlighted menu. Executes the current test item.
NOTE Pressing any key may cause an abort if allowed by the test being performed. A power
cycle is used to arbitrarily stop a test.