Xerox 7750DXF - Phaser Color Laser Printer User Manual

Adjustments and Calibrations 6-15
Additional Information
For information on the following topics, see, "Service Diagnostics" on page 4-2.
■ TRC Adjust
■ ADC Output Check - Check ADC Sensor Fail = 0
■ Tone Up/Down - Check ATC Sensor Fail = None
■ Laser Power Check
■ PWM Mapping - For Engineering Use Only
Storing NVRAM Values on the Hard Drive
The Phaser 7750 printer has a hard drive installed in every printer. The hard drive
boots the PostScript firmware. There is a special file on the hard drive that stores the
specific calibration values for various sensors and for the laser in the printer.
■ During manufacturing, the calibration values from the engine NVRAM have
been written to the hard drive. The stored values can be written back to the
engine NVRAM by performing a front panel “Restore Engine NVRAM
Now” reset procedure.
■ If "restore" engine NVRAM does not restore correct color registration, the
RegiCon procedure must be performed. After completing the RegiCon
process, perform the engine NVRAM "store" function to store the new
engine NVRAM values to the hard drive.
■ If the hard drive needs to be replaced, there is an engine NVRAM "store"
function in the service diagnostics that enables the current engine NVRAM
values to be written to the new hard drive.
■ If the engine control board is replaced, the NVRAM values on the hard drive
need to be written to the new board with the engine NVRAM "restore"
function.

Xerox 7750DXF - Phaser Color Laser Printer Specifications

General

Brand	Xerox
Model	7750DXF - Phaser Color Laser Printer
Category	Printer
Language	English