Xerox Phaser 6121MFP Service Manual page 281

Phaser 6121MFP Service Manual
ADF Sub Zoom
Function
To adjust for variations in the accuracy of all parts and their mounting accuracy by
varying the scanning zoom ratio in the sub-scanning direction (when using the
Automatic Document Feeder).
Use
When the Image Processor Board or the original glass is replaced, or when a new
Auto Document Feeder Unit is mounted.
Note
When the Image Processor Board is replaced, the ADF Sub Zoom value is
cleared. If you replace the Image Processor Board, perform the Scanner Sub
Zoom adjustment (page 6-15) and then adjust the ADF Sub Zoom.
Default Setting
0 mm
Adjustment Range
-2.0% to +2.0%, Step: 0.4%.
Setting/Procedure
1. Print Test Pattern 1 (page 6-32).
2. Enter the Adjustment menu in the service mode.
3. Select ADF Sub Zoom and press the OK button.
4. Place the test pattern into the Automatic Document Feeder and make a test
copy.
Note
Position the test pattern vertically. Use A4 or Letter paper loaded into
Tray 1 to make the test copy.
5. Check that the width of E in the copy of Test Pattern 1 meets the specification.
• Calculation:
(1 - Width of E in the document ÷ Width of E in the copy) × 100.
• If the width of E is out of specification, adjust it according to the following
procedure.
6. Press the Menu button.
7. Using the Up and Down Arrow buttons, change the setting value and then
press the OK button.
8. Place the test pattern into the Automatic Document Feeder. Then, make a test
copy and recheck it.
Adjustments and Calibrations
6-19