HP LaserJet Enterprise 500 Maintenance Manual - Page 81

General Symptom List, Shuttle, Table 3. General Symptom List

Page 81 highlights

General Symptom List Symptom Shuttle does not move Table 3. General Symptom List Solution Shuttle 1. Power down the printer. Remove the shuttle cover. Check the MPU gap. Adjust the gap between the MPU assembly and the flywheel to 0.010 ± .001 inch (0.254 ± 0.025 mm). Torque the 7/ 16 inch MPU clamp screw to 18 ± 1 inch-pounds (2.03 ± 0.11 N•m). 2. Check that the MPU cable is connected to J03 on the mechanism base. Check that the shuttle motor cable is connected to J02 on the mechanism base. Connect the MPU and the shuttle motor cables. 3. Remove the paper path or pedestal top cover. Check that the shuttle motor drive cable is connected to J116 on the CMX controller board. 4. Check the platen gap. Adjust the platen gap. 5. Inspect the ribbon mask for bends or deformation that snag and interfere with shuttle movement. Make sure the hammer bank cover assembly is correctly installed on its mounting pegs. Reinstall the hammer bank cover assembly. Replace a damaged or deformed hammer bank cover assembly. 6. Check continuity of the shuttle motor drive cable assembly. Replace shuttle motor drive cable assembly if it fails continuity test. 7. Power up the printer. Run a Shuttle Slow or Shuttle Fast test. If the shuttle does not move, replace the shuttle frame assembly. 8. Power up the printer. Run a Shuttle Slow or Shuttle Fast test. If the shuttle does not move, replace the power supply board. 9. Power up the printer. Run a Shuttle Slow or Shuttle Fast test. If the shuttle does not move, replace the CMX controller board. 81

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General Symptom List
81
Shuttle
Shuttle does not move
1.
Power down the printer. Remove the shuttle cover. Check the
MPU gap. Adjust the gap between the MPU assembly and the
flywheel to 0.010
±
.001 inch (0.254
±
0.025 mm). Torque the 7/
16 inch MPU clamp screw to 18
±
1 inch-pounds (2.03
±
0.11
N•m).
2.
Check that the MPU cable is connected to J03 on the mechanism
base. Check that the shuttle motor cable is connected to J02 on
the mechanism base. Connect the MPU and the shuttle motor
cables.
3.
Remove the paper path or pedestal top cover. Check that the
shuttle motor drive cable is connected to J116 on the CMX
controller board.
4.
Check the platen gap. Adjust the platen gap.
5.
Inspect the ribbon mask for bends or deformation that snag and
interfere with shuttle movement. Make sure the hammer bank
cover assembly is correctly installed on its mounting pegs.
Reinstall the hammer bank cover assembly. Replace a damaged
or deformed hammer bank cover assembly.
6.
Check continuity of the shuttle motor drive cable assembly.
Replace shuttle motor drive cable assembly if it fails continuity
test.
7.
Power up the printer. Run a Shuttle Slow or Shuttle Fast test. If
the shuttle does not move, replace the shuttle frame assembly.
8.
Power up the printer. Run a Shuttle Slow or Shuttle Fast test. If
the shuttle does not move, replace the power supply board.
9.
Power up the printer. Run a Shuttle Slow or Shuttle Fast test. If
the shuttle does not move, replace the CMX controller board.
Table 3. General Symptom List
Symptom
Solution