HP LaserJet Enterprise 500 Maintenance Manual - Page 77

PAPER ADVANCE, Symptom, Solution

Page 77 highlights

General Symptom List Symptom Paper feeds poorly Power on "hang" condition Table 3. General Symptom List Solution 1. Check the forms thickness lever: if it is set too tightly paper feeding can be affected. Set the forms thickness lever to match the thickness of the paper being used. 2. Power off the printer. Remove paper. Inspect the paper feed path for obstructions that could snag paper. Clear paper feed path of any obstructions. 3. Inspect the tractors and tractor door springs for damage or excessive wear. If either tractor is damaged or visibly worn, replace both tractor assemblies. 4. Check the paper feed motor pulley for looseness. Hold the collar snug against the motor pulley and torque the 7/64 inch setscrew to 25 ± 2 inch-pounds (2.82 ± 0.23 N•m). 5. Check the condition and tension of the paper feed timing belt. Adjust the paper feed timing belt. Replace the belt if it is damaged. 6. Check the platen gap. Adjust the platen gap. 7. Remove the paper path or pedestal top cover. Make sure connector P107/PAPR M is fully seated in connector J107 on the CMX controller board. 8. Load paper. Power on the printer. Press PAPER ADVANCE and VIEW several times and check that paper moves in both directions. Replace the paper feed motor if paper does not move in both directions. 9. Power on the printer. Press PAPER ADVANCE and VIEW several times and check that paper moves in both directions. Replace the CMX controller board if paper does not move in both directions. 1. Remove the paper path or pedestal top cover. Reseat all cable connections to the CMX controller board and the power supply board. 2. Power up the printer. If the printer "hangs," replace the CMX controller board. 3. Power up the printer. If the printer "hangs," replace the power supply board. 77

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General Symptom List
77
Paper feeds poorly
1.
Check the forms thickness lever: if it is set too tightly paper
feeding can be affected. Set the forms thickness lever to match
the thickness of the paper being used.
2.
Power off the printer. Remove paper. Inspect the paper feed path
for obstructions that could snag paper. Clear paper feed path of
any obstructions.
3.
Inspect the tractors and tractor door springs for damage or
excessive wear. If either tractor is damaged or visibly worn,
replace both tractor assemblies.
4.
Check the paper feed motor pulley for looseness. Hold the collar
snug against the motor pulley and torque the 7/64 inch setscrew
to 25
±
2 inch-pounds (2.82
±
0.23 N•m).
5.
Check the condition and tension of the paper feed timing belt.
Adjust the paper feed timing belt. Replace the belt if it is
damaged.
6.
Check the platen gap. Adjust the platen gap.
7.
Remove the paper path or pedestal top cover. Make sure
connector P107/PAPR M is fully seated in connector J107 on the
CMX controller board.
8.
Load paper. Power on the printer. Press
PAPER ADVANCE
and
VIEW
several times and check that paper moves in both
directions. Replace the paper feed motor if paper does not move
in both directions.
9.
Power on the printer. Press
PAPER ADVANCE
and
VIEW
several times and check that paper moves in both directions.
Replace the CMX controller board if paper does not move in both
directions.
Power on “hang” condition
1.
Remove the paper path or pedestal top cover. Reseat all cable
connections to the CMX controller board and the power supply
board.
2.
Power up the printer. If the printer “hangs,” replace the CMX
controller board.
3.
Power up the printer. If the printer “hangs,” replace the power
supply board.
Table 3. General Symptom List
Symptom
Solution