01/026-18825/8830 PrinterGeneral Procedures6 General ProceduresDiagnosticsTo Enter The Diagnostic Mode ....................................................................................... 6-3To Exit The Diagnostic Mode .......................................................................................... 6-4Input Diagnostic Test Procedure ..................................................................................... 6-4Input Diagnostic Test Codes ........................................................................................... 6-5Output Diagnostic Test Procedure .................................................................................. 6-5Output Diagnostic Test Codes ........................................................................................ 6-6Stepper Motor Commands .............................................................................................. 6-7To Enter Multiple Tests (Chaining).................................................................................. 6-7To Exit from Multiple Tests.............................................................................................. 6-8Special Tests................................................................................................................... 6-8General ProceduresGP 1 HVPS Checkout ..................................................................................................... 6-11GP 2 Image on Drum (Panic Stop) Procedure................................................................ 6-11GP 3 Drum Maintenance................................................................................................. 6-12GP 4 Drum Cleaning Enhancement................................................................................ 6-13GP 5 Communication Loopback Test ............................................................................. 6-13GP 6 Downloading Firmware from a Laptop ................................................................... 6-14GP 7 NVM Dump of Adjustable Settings......................................................................... 6-15Service NotesTransfer and Developer Bias Voltages incorrect (Tag 19) .............................................. 6-17Power Cord Outlet Pulls Out Of AC Module ................................................................... 6-18PRE-TAG 9 Maximum Length Shortfall .......................................................................... 6-18Wavy Lines When Connected To XPC or Non Xerox Controller .................................... 6-19LL-52 Errors After Installing New Control PWB .............................................................. 6-19Cooling Fan Not Running ................................................................................................ 6-20Cleaning Blade Squeals During Print Cycle .................................................................... 6-20Toner Cleaning Auger Bound Up .................................................................................... 6-21LL-22 Caused By Metal Filings ....................................................................................... 6-21Intermittent Black Lines Or Background Bands .............................................................. 6-22Bent Corners (Dog Ears) On Lead Edge Of Narrow Media ............................................ 6-22Problems With Film Stacking .......................................................................................... 6-23Low Solid Area Density At Install .................................................................................... 6-24Intermittent Extra Print .................................................................................................... 6-24Loud Noise From HVPS.................................................................................................. 6-25Troubleshooting Photoreceptor Drive Problems ............................................................. 6-25Photoreceptor Damage ................................................................................................... 6-26Image Displacement (Rollover) On Vellum Or Film ........................................................ 6-26InstallationInstallation Procedure ..................................................................................................... 6-29Product Demonstration ................................................................................................... 6-40Installation Checklist ....................................................................................................... 6-41RemovalRemoval Procedure ........................................................................................................ 6-43ToolsGeneral Tools and Supplies (NACO) .............................................................................. 6-47General Tools and Supplies (EO) ................................................................................... 6-48Molex Connector Repair Procedure ................................................................................ 6-50Product SpecificationsProduct Specifications..................................................................................................... 6-538825 Change Tag8825 Change Tag Information......................................................................................... 6-558830 Change Tag8830 Change Tag Information......................................................................................... 6-59