Phaser 8400/8500/8550/8560 Color Printer Service Manual 3-7Error Messages and CodesFault Code Error Message TroubleshootingFault Code Error ReportingFault codes are saved to NVRAM and can be retrieved from the printer’s faulthistory.All procedures that ask for a test to be run are referencing tests from withinthe “hidden” Service Diagnostics menu. For more information on ServiceDiagnostics tests, their results, and how to enter into diagnostic mode, see“Service Diagnostics” on page 4-4.In normal customer mode, the printer will reboot each time an error occurs. Ifthree of the same errors occur within 72 hours, or 1000 pages, the fault isdisplayed on the printer’s Control Panel.Interpreting Fault Codes■ Failing system (XX,yyy.zz)■ Failing subsystem (xx,YYY.zz)■ Checksum (xx,yyy.zZ■ Type of problem (xx,yyy.Zx)■ Print engine copy count when the error occurred (xx,yyy.zz:123)(xx,yyy.4x) Device faults are indicated by a 4 in the tenths place of the fault code.This indicates a hardware problem. The most common device faultstroubleshooting procedures are documented in this section.(xx,yyy.6x) Program faults are indicated by a 6 in the tenths place of the fault code.Unfortunately, there are too many program faults to enumerate them all andmost program faults will not mean anything unless you are intimately familiarwith the code base. Some of the more common program faults aredocumented in this section.(xx,yyy.7z) CPU exceptions are indicated by a 7 in the tenths place of the fault code.The error code indicates both the PowerPC exception number and the regionof firmware that was executing when the exception occurred: Engine,PostScript, Network, or Operating System.NoteA CPU exception can either be caused by hardware or firmware error.Refer to the infoSMART Knowledge Base for descriptions of the mostcommon faults.
