Xerox Phaser 7750 Servicehandleiding - Pagina 10

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Introduction

This chapter covers the general startup, PostScript, and power supply operations of

the printer to aid in troubleshooting problems not associated with an error code or

front panel error message.

For troubleshooting problems associated with an error code or front panel error

message, see "Error Messages and Codes" on page 3-1.

Troubleshooting procedures isolate a problem to a specific component or

subassembly, in some cases including the wiring harness.

Service Diagnostics

The Phaser 7750 Color Laser Printer has built-in diagnostics that allow access to

sensors, turning on and off motors, clutches, solenoids, built-in test patterns, cleaning

maintenance operations, printer status and some NVRAM access. Using these tests,

the service technician should be able to diagnose problems quickly and isolate which

component or sub assembly part needs replacement.

Service diagnostics are to be executed through the front panel by a certified service

technician only. Service Diagnostics can be entered one of two ways:

Entering Service Diagnostics by Reboooting the Printer:

Turn the printer power OFF.

Hold down the Back and Information buttons simultaneously and turn the

printer back ON.

Continue to hold the buttons until the following message is displayed on the front

panel:

Service Diagnostics V#.##,

buttons.

The front panel displays the

You can print a Service Diagnostics Menu Map by highlighting

Service Diagnostics

The printer will now run through POST and return to

You will need to re-enter service diagnostics.

Entering hidden service menu without rebooting the printer

Troubleshooting

Scroll to the

menu.

Hold down the Up and Down buttons simultaneously.

4-2

Initializing..., and then release the

Service Diagnostics

Menu, and pressing OK.

Service Tools

-->

Phaser 7750 Printer Service Manual

Menu.

Ready.

Printer Status Page

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