Xerox WorkCentre 6655

Purpose

This procedure describes the following items:

• How to enter Service Diagnostics
• The Service Diagnostics screen.
• How to exit Service Diagnostics

NOTE:
When Service Diagnostic mode is entered, all existing print jobs are suspended. All scheduled jobs are held in a queue until Service Diagnostics exits.
To enter Service Diagnostics remotely, refer to GP 25

Description

The WorkCentre 6655 has built-in diagnostics that allow access to sensors, clutches, solenoids, motors, printer status, and some NVRAM access. Using these tests, service technicians should be able to diagnose problems quickly and isolate which component or assembly needs replacement.

The printer’s operating system monitors sensors located throughout the print engine and attached options. Sensors are used to monitor media handling and mechanical activity along the entire media path. As a sheet travels along the paper path, sensors change state temporarily to indicate the sheet’s presence. If the pattern of sensor state changes differs from the expected timing for a particular media size and path, the sensor where the timing difference occurs identifies the error to report. However, having the error message information does not necessarily pinpoint the problem. Sensor signals locate where, but often cannot identify why. Motors, belts, gears, solenoids, and numerous other parts are involved in media transport. The Service Diagnostics’ suite of tests and utilities are the best tools available to pinpoint the root cause behind the reported error.

If confronted with an error that requires more than a cursory investigation to clear or when directed by a troubleshooting procedure, use Service Diagnostics to exercise selected subassemblies or parts in the vicinity of the reported error. Diagnostic tests are controlled from the Control Panel.

Procedure

To enter Service Diagnostics:

1. Press and hold 0 (zero) for at least 5 seconds.
2. While holding 0 (zero), press and release the Start button.
3. Enter 6789 on the login screen and touch Enter.
4. The Service Info tab is displayed upon entering Service Diagnostics

Service Diagnostics tabs

When the Service Diagnostic screen is displayed, these tabs are available: Service Info, Diagnostics, Adjustments, Maintenance, and Call Closeout. Touch a tab to open that group. Touch a dC routine to launch it.

• Service Info
  This is the default tab for Service Diagnostics. It contains the following: General information (serial #, product code, image count, s/w version, IP address). dC104, dC108, dC120, dC122 and dC135
• Diagnostics
  This tab contains: dC140, dC312, dC330 and dC612
• Adjustments
  This tab contains: dC131, dC301, dC361, dC919, dC945, and dC1033.
• Maintenance
  This tab contains: dC120, dC122, dC132, and dC135.
• Call Closeout
  This tab allows you to choose whether the printer reboots when you exit diagnostic mode, and whether fault counters are cleared. Touch Reset Counters? to clear fault history.

To exit Service Diagnostics:

1. Use Call Closeout to exit diagnostics mode. It is recommended that following diagnostic testing, you reboot the printer to return it to correct operation.
2. Allow diagnostics to time-out.