Printer's Sub-Scanning Registration Adjustment - NEC NEFAX 671 Service Manual

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Printer's Sub-Scanning Registration Adjustment

<Requirement>
• Adjust the width of C in the printed test pattern so
that the following specification is met.
4007D051AA
Specification Mode Function Item Setting Range
87 to 113
20 ± 2.5 mm "ADJUST" menu PRN SUB REGIST
1 increment = 0.46 mm
Perform this adjustment in the following cases.
• After the PH Unit has been replaced
• After the printer's main scanning registration adjustment has been performed
<Adjustment Procedure>
1. Print the test pattern.
2. Check that the width of C in the test pattern meets the specification.
If the width of C is out of specification, adjust it according to the following procedure.
3. Enter the "ADJUST" menu in the Service mode.
4. Change the setting.
If the width of C in the test pattern is longer than the specified width..... Increase the setting.
If the width of C in the test pattern is shorter than the specified width..... Decrease the set-
ting.
✽ If the shift cannot be adjusted to within the specification with a single adjustment, perform
the adjustment again to change the setting.
5. Press the Yes key to apply the setting.
NOTE
If the Stop key is pressed, instead of the Yes key, the main screen is displayed and the set-
ting returns to that before it was changed.
6. Print a test pattern again and check it.
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