4-2 Phaser 6280 Color Laser Printer Service ManualGeneral TroubleshootingIntroductionThis chapter covers the System Startup, Power On Self Test (POST), ServiceDiagnostics, and troubleshooting problems that are not associated with aChain Link code or Control Panel error message.For troubleshooting problems associated with a Chain Link code or ControlPanel error message, refer to “Error Messages and Codes” on page 3-1.Print-quality problems are covered in “Print-Quality Troubleshooting” onpage 5-1.System StartupListed here is a typical startup routine from a cold start. The printer requiresapproximately 20 seconds to complete this sequence.1. When the power switch is turned On, the “Health” LED on the ImageProcessor Board turns On immediately.2. The Boot Loader checks for RAM present and functional. If an error isdetected, RAM ERROR is displayed and the Health LEDs alternately blinkat 1/2 second intervals.3. The Boot Loader then loads and runs POST diagnostics.4. POST turns Off the Health LED.5. POST checks the Control Panel.6. The Control Panel LED cycles: Green and Red simultaneously, andGreen.7. The Control Panel LED turns Green and Red and Diagnosing...message is displayed.8. The Control Panel message changes to Ready Calibrating and thenXerox (TM) Print Cartridge.9. The Control Panel LED turns Green and the Ready message isdisplayed.
