Xerox Phaser 7760 Service Manual

January 2010
4-97
Phaser 7760 Color Laser Printer
ADJ 9.1, ADJ 9.2
Repairs and Adjustments
Revised
ADJ 9.1 Belt Edge Learn
Purpose
To establish correct horizontal and vertical positioning of the four primary color images.
Procedure
NOTE: Data cannot be adjusted within this function. This is an information only.
1. Enter the Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools
> Printer Status Page > hold the Up and Down buttons simultaneously > Run Service
Diagnostics > OK.
2. Select Adjustments/Calibrations and press OK.
3. Select Belt Edge Learn and press OK.
4. The printer starts processing with blinking Running... message appears.
5. Review the result on the display.
• Belt Edge Learn Result: {OK | Fail}
6. Press Back or Cancel to abort the process.
ADJ 9.2 ATC Sensor Setup
Purpose
CAUTION
This procedure should only be performed when the ATC Sensor or Developer Housing is being
replaced, OR when there is reason to believe that the calibration values in NVRAMM are incor-
rect.
The Automatic Toner Concentration (ATC) sensor measures the toner to bead ratio in each
Developer. These sensors have an intrinsic gain and output value that are stored in printer
NVRAM. New values must be entered when a new Developer Housing is installed. Incorrect
values have color balance effects.
On the side of each Developer Housing Assembly is a small tag with a bold-faced three-digit
number printed near the bottom. The first digit is always 0. The other digits range between 0
and 99.
Procedure
To set the new values:
1. Enter the Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools
> Printer Status Page > hold the Up and Down buttons simultaneously > Run Service
Diagnostics > OK.
2. Select Adjustments/Calibrations and press OK.
3. Select ATC Sensor Setup and press OK.
4. Note the current values for the tag numbers on the Control Panel display. The values
should correspond to the tag numbers of the Developers actually installed.
5. Select the color of the Developer you installed.
6. Enter the tag number. Use the Back and Help buttons to select which digit you want to
change. Use the Up and Down buttons to modify the digit.
7. Press OK to enter the data in the Engine NVRAM.
8. Press any button to abort the process.

Xerox Phaser 7760 Specifications

General

Brand	Xerox
Model	Phaser 7760
Category	Printer
Language	English