Unisys EFP9800 manual Section Diagnostics and Print Tests, Level 0 Diagnostics

Section 3

Diagnostics and Print Tests

The following diagnostic tests are available for the EFP9800:

•Level 0 Diagnostics: Performed during the startup cycle and each time the printer is reset.

•Level 1 Diagnostics: Performed using DIP switches or the Paper Feed button.

•Diagnostic Print Tests.

Level 0 Diagnostics

The printer automatically performs Level 0 diagnostics each time it is turned on. Level 0 diagnostics include the following:

•All motors and solenoids are turned off.

•Microprocessor timing is checked.

•Firmware ROM is tested.

•On board and external RAM are checked.

•If this test succeeds, the green Online LED flashes once.

•If this test fails, Level 0 diagnostics stop. The printer becomes inactive: the printhead does not home, the red Paper Status and the green Slip In LED’s turn on, and the printer is unable to communicate with the host computer.

•Printhead is homed. If this action fails, a fault condition occurs.

•Status of all sensors is checked and status bytes are updated.

If this is the first time that the printer is turned on, or if a new NVRAM has been installed, the default values for the printer functions and tests are loaded into NVRAM during Level 0 diagnostics. To change the printer functions and tests, use Level 1 diagnostics. For more information, see “Level 1 Diagnostics” on the next page.

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