Phaser 7500 Printer Service Manual 3-255
Error Messages and Codes
Drum CRUM (K/Y/M/C) Data Mismatch
Incorrect authentication area data was detected in Drum (K/Y/M/C).
Applicable Chain-Link Codes
• 091-916: Drum CRUM K Data Mismatch
• 091-943: Drum CRUM Y Data Mismatch
• 091-944: Drum CRUM M Data Mismatch
• 091-945: Drum CRUM C Data Mismatch
Initial Actions
• Power cycle the printer.
• If the problem persists, follow the procedure below.
1. Remove and reinstall the Imaging Unit (K/Y/M/C) as indicated. If problems
are found, replace the Imaging Unit (K/Y/M/C) (REP 1.2, page 8-10).
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Imaging Unit, PL8.1.4