Xerox DOCUPRINT N4525 Service Quick Reference Manual page 420

Puncher Alignment
1.
Use Letter size paper for 3-hole punch, and A4 for 4-hole punch.
2. Measure dimension A or A' for 3-hole and B or B' for 4-hole.
3.
If measured value is smaller than criteria shown in above table, loosen punch
unit fixing screws (2) and move the unit toward the rear by the gap (Criteria -
Measured valut).
4.
If measured value is larger than criteria shown in above table, loosen punch
unit fixing screws (2) and move the unit toward the front by the gap (Measured
value - Criteria).
5.
Tighten the fixing screws (2).
6. Run a test print using hole punch and remeasure. If out of specification, repeat
steps 2-6 above until proper alignment is achieved.
6-752 DocuPrint N4525 Network Laser Printer - Service Guide