Atc Sensor Setup; Additional Information - Xerox 7700DX - Phaser Color Laser Printer Service Manual

ATC Sensor Setup

The Automatic Toner Calibration (ATC) sensor measures the amount of toner
in each developer. These sensors have an intrinsic gain and output value are
stored in printer NVRAM. New values must be entered when a new Developer
Housing Housing is installed. Incorrect values have color balance effects.
On the side of each new Developer Housing Assembly is a small white 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. There is a tear off
section of the tag that should be placed on the chassis somewhere in plain
view when the front door is open.
To set the new values:
1. Enter Service Diagnostics.
2. Highlight Adjustments/Calibrations menu and press OK.
3. Highlight ATC Sensor Setup Test and press OK.
4. Note the current values for the tag numbers on the front panel display.
They 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. You can only modify the lower two digits. Use the
Back and Info keys to select which digit you want to change. Use the Up
and Down keys to actually modify the digit.
7. Press OK to enter the data in engine NVRAM.
8. Press any button to abort the test.

Additional Information

For information on the following topics, see "Service Diagnostics Test Menu
Functions" on page 2-36.
TRC Adjust - For Engineering Use Only
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
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