Xerox ColorQube 8570 Service Manual page 83

91,900, 91,903, 91,904, 93,901 Printhead NVRAM or PLD
Fault
A Printhead NVRAM error has occurred. The following troubleshooting procedure applies to
this error.
Table 1 Applicable Fault Codes
91,900 Printhead NVRAM Read Error
91,903 Printhead NVRAM Read/Write Error
91,904 Printhead has wrong PLD version.
93,901 Head Waveform Zero Drop Mass
Initial Actions
• Reboot the printer and verify the error persists.
• Check the Printhead wiring harness connectors.
• If the problem persists, perform the following procedure.
Troubleshooting Reference
Applicable Parts (Chapter 5 - Parts List)
• Printhead Assembly, PL 2.1 Item 3
• Cable, Printhead Interface, PL 5.1 Item 20
Wiring and Plug/Jack References (Chapter 7 - Wiring Data)
• Figure 2, Wave Amplifier, Printhead
• Figure 6, Top Side Wire Routing
Procedure
Check the Printhead wiring harness connectors P/J180, P/J201, and P/J240. Are the con-
nections secure and undamaged?
Y N
Reseat and/or replace the wiring harness. Does the error persist?
Y N
Troubleshooting complete.
Replace the Printhead Assembly (REP
Replace the Printhead Assembly (REP 2.3).
Xerox Internal Use Only - Revised, 3rd Revision
ColorQube 8570/8870 Service Manual
2.3).
October 2012
2-37
Fault Messages and Codes
91,900, 91,903, 91,904, 93,901