Xerox Phaser 7400 Service Manual page 662

Service Diagnostics Tests and Utilities (Continued)
Menu Item
Adjustments/Calibrations - Performs adjustments, calibrations or operations essential to the
performance of the printer. For complete walk-through procedures, see "Calibrations" on
page 6-2.
(ADC) Auto Density Control - Density Calibration: Verifies ADC operation, replacement ADC
tag number is entered, then the operation is tested. The following functions are all part of the
Auto Density Control.
Edit Density
Data
Execute Density
Calibration
Density
Calibration
Results
(ATS) Auto Thickness Sensor
ATS 4-Sheet Calibration - Verifies ATS operation. Test requires 4 sheets of premeasured
media. A fifth sheet of paper, the bottom sheet, is recommended to prevent 'tray empty' issues.
Media is picked from Tray 1 (MPT). "Automatic Thickness (ATS) Calibration" on page 6-4 for the
detailed procedure. The following tests are all part of the ATS Thickness Sensor.
Edit Thickness Data - Thickness Calibration: Premeasured media thickness can be entered
here in units of mils or microns, the calibration procedures use Microns. Input is constrained,
when necessary, to system-dependent limits independent of actual user input values. Limits are
70 - 200 um.
A-24
Front Panel Display Results
Current Tag Number: nnh
Change Tag Number?
Yes
No
Enter Tag Number: nnnnnnnnhh
Tag Number set to nnhh
Density Adj. Test Passed / Failed
Passed / Calibration Error / Density
Sensor Error / Density Shutter Error /
Density ID Error / Unknown Error
YMC: V=nnn DAC=nnH
K: V=nnn DAC=nnH
Select Thickness Units
Mils
Microns
Enter Thickness: n.nn Mils -or- xxx
Microns
Functional Definition
Find the tag number on the bottom
of the Registration Shutter.
Enter the last two digits (hh)
<Press OK to select>
<Press Back or Cancel to abort>
<Press Up/Down to change>
<Press OK to select value>
<Press Back or Cancel to abort>
<Press Back or Cancel to abort>
Engine is prepared for calibration
run, and ADC operation is verified.
<Press Back or Cancel to abort>
Example:
YMC: V=120 D: V=130
<Press Help(?) to toggle display>
<Press Back or Cancel to exit>
<Press OK to select>
<Press Back or Cancel to abort>
Microns are used in test examples.
Default thickness is 140 microns.
<Press Up/Down to modify>
<Press Help(?) to change digit>
<Press OK to select value>
<Press Back or Cancel to abort>
Phaser 7400 Color Printer Service Manual