Xerox Phaser 6121MFP Service Manual page 283

Phaser 6121MFP Service Manual
5. Check the amount that widths A and B in the copy of the test pattern are
shifted. If the shift is out of specification, adjust it according to the following
procedure.
Press the OK button.
a.
b. Using the Up and Down Arrow buttons, change the setting value and
then press the OK button.
c. Place the test pattern 1 into the Automatic Document Feeder. Then, make
a test copy again and check it.
• If the width of A is less than the width of B, increase the setting.
• If the width of B is less than the width of A, decrease the setting.
ADF Sub Reg
Function
To adjust for variations in the accuracy of all parts and their mounting accuracy by
varying the scanning start position in the sub-scanning direction when using the
Automatic Document Feeder.
Use
When the original glass is replaced, or when a new Auto Document Feeder Unit is
mounted.
Note
Perform this adjustment after the Scanner Sub Zoom and ADF Sub Zoom
adjustments have been performed.
Adjustment Specification
Adjust the width of C in the copy of the test pattern1 so that the specification of
20 mm ± 2.5 mm.
Adjustment Range
-5.0 mm to +5.0 mm, Step 0.5 mm.
Setting/Procedure
1. Print the test pattern1 (page 6-32).
2. Enter the Adjustment menu in the service mode.
3. Select ADF Sub Reg, and press the OK button.
4. Place test pattern in the ADF with its printed surface up.
5. Select Test Copy and press the OK button to make a test copy.
Note
Position the test pattern vertically.
Use A4 or Letter paper loaded into Tray 1 to make the test copy.
6. Check that the width of C in the copy of the test pattern is shifted.
Adjustments and Calibrations
6-21