4-2 Phaser 6128MFP Service Manual
General Troubleshooting
Introduction
This chapter covers the System Startup, Power On Self Test (POST), Service
Diagnostics, and troubleshooting procedures not associated with a Chain Link
code or Control Panel error message.
For troubleshooting problems associated with a Chain Link code or Control Panel
error message, refer to “Error Messages and Codes” on page 3-1. Print-quality
problems are covered in “Print-Quality Troubleshooting” on page 5-1.
System Startup
Listed here is a typical startup routine from a cold start. The printer requires
approximately 20 seconds to complete this sequence.
1. When the power switch is turned On, the “Health” LED on the Image Processor
Board turns On immediately.
2. The Boot Loader checks for RAM present and functional. If an error is
detected, RAM ERROR is displayed and the Health LEDs alternately blink at 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, and Green.
7. The Control Panel LED turns Green and Red and Diagnosing... message is
displayed.
8. The Control Panel message changes to Ready Calibrating and then Xerox
Toner Cartridge.
9. The Control Panel LED turns Green and the Ready message is displayed.
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