Xerox 5915, Service Manual

Page: 67 / 146

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Section 4 Disassembly/Assembly/Adjustment
8. Fuser
8.2.4 Contact Arc Adjustment
Purpose To obtain the appropriate fusing
level.
NOTE : A narrow contact arc would cause
improper fusing. Wide contact
arc or a great difference in contact arc
between front and rear would cause
wrinkled or curled copies.
Check
1. (Fig 1): Make two or three copies of A4(LEF)
paper with their halves solid black.
Regard the copies as the measurement paper.
(Fig. 1)
2. Make fifteen copies of Test Chart onto A3
paper to even the temperatures of the Heat
Roller and the Pressure Roller.
3. Put the black copy obtained from procedure
No.1 on the MSI face down
4. Hold the measurement paper so that it copy
reaches the Heat Roll & the Pressure Roll.
5. Take out the measurement paper after closing
the machine for approx. 8~10 seconds
6. (Fig. 2): Open the measurement paper gently.
Take measurements at the positions 75 mm
from the both sides of the paper respectively
(at two positions on the fold made when the
paper is folded into quarters with its lead edge
aligning to its trail edge.)
••••
Proper width of NIP
5.5
±
0.15mm
measurement paper A4LEF
(Fig. 2)
Adjustment
1. (Fig. 3): Adjust by rotating the Adjustment
Screws(at front/rear).
➀
. Loosen Lock Nut.
➁
. Slide the bracket.
➂ . Tighten Lock Nut.
NOTE : Width of NIP increases: Slide the bracket
to inside.
Width of NIP decreases: Slide the bracket
to inside.
(Fig. 3)
2. Adjust by repeating Check Steps 1 through 6.
decrease increase
I ncrease decrease
75mm 75mm
297mm
A4
NIP