Xerox N2125N - DocuPrint B/W Laser Printer, Service Manual

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02/2000
4-115 DocuPrint N2125
ADJ 1.1
Repair-Adjustment Initial Issue
ADJ 1.1 Registration
Purpose
To adjust the registration in the scan direction and the process direction.
To set Default Tray
1. Enter Diagnostics and select Test Print.
2. Scroll to Input Tray.
3. Select the tray that you wish to feed from.
4. Press “Enter”.
5. Exit Diagnostics.
Check
1. Ensure that Edge to Edge Printing is set to off.
2. Set the Default Tray.
3. Enter diagnostics and select Test Print.
4. Scroll to Print Pattern and press Enter to run a IOT Test Pattern.
5. After at least two prints are completed ( Figure 1 ), press and hold the [0] key for one sec-
ond to stop printing.
6. The measurement should be made on two consecutive test patterns from each tray.
• Measure the distance from the lead edge of the paper to the lead edge of the image
(A) and measure the distance from the trail edge of the paper to the trail edge of the
image (B) (
Figure 1 ). These two measurements should be within 1mm.
• Measure the distance from the left edge of the paper to the left edge of the image (C)
and measure the distance from the right edge of the paper to the right edge of the
image (D) (
Figure 1 ). These two measurements should be within 1mm.
7. If either measurement does not meet specification perform the adjustment below.
8. Repeat steps 2 through 7 for each paper tray.
9. From the Test Print menu, set duplex to on and print a duplex test print. Check the adjust-
ment (step 5) for the duplexed print.
NOTE: When checking the measurement for a duplexed print in the scan direction, you
must exit diagnostics and run a duplexed System Controller Test Print. Fold the test pat-
tern in half, left edge to right edge. The target should be within 2mm of the fold line.
Adjustment
1. Enter Diagnostics and select NVM Config.
2. Enter the NVM Password (0734).
3. Scroll to process (Tray X Proc Dir) or scan (Tray X Scan Dir) adjustment for the desired
tray.
4. Press the Value Key (3 or 7) to display the current setting.
5. Use the 3 or 7 keys to set the new value (Each increment of change equals 0.5mm).
NOTE: In the scan direction, increasing the value moves the image to the right and
decreasing the value moves the image to the left. In the process direction, increasing the
value moves the image toward the trail edge and decreasing the value moves the image
towards the lead edge.
6. Press Enter to save the setting.
7. Scroll to Test Print. Select Print Pattern and press Enter.
8. Measure the distance from the lead edge of the paper to the lead edge of the image (A)
and measure the distance from the trail edge of the paper to the trail edge of the image
(B) (
Figure 1 ). These two measurements should be within 1mm.
9. Measure the distance from the left edge of the paper to the left edge of the image (C) and
measure the distance from the right edge of the paper to the right edge of the image (D)
(
Figure 1 ). These two measurements should be within 1mm.
10. Repeat steps 1 through 9 until equal lead edge to trail edge (process direction) and side-
to-side (scan direction) measurements are achieved.
Figure 1 IOT Test Pattern
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