Hello... this is what the service manual says:
31,001.40 Mechanical Initialization Jam
A software error has occurred. The following troubleshooting procedure applies to this error:
• Check routing of tray sensor harnesses.
• Check that the Take Away Rollers are free of obstructions.
• If the problem persists, follow the procedure below.
The troubleshooting table lists parts and wiring referenced in the troubleshooting procedure.
Table 1 31,0xx.4x Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
Media Drive Assy, PL 4.0 Left Side Harness (2/2), Figure 5
Table 2 X-Axis Program Faults Troubleshooting Procedure
Step Questions or Actions Yes No
1 Check the Take Away Rollers.
Do the rollers show signs of excessive
wear or damage?
Replace the affected
Go to Step 2.
2 Test the Media Drive.
Run the Service Diagnostics Paper Path
Does the Media Drive operate correctly?
Go to Step 4. Go to Step 3.
3 DId the Media Drive run extremely fast? Replace the Media
Go to Step 4.
4 Check the rollers.
Remove the Media Drive Assembly and
check each roller for binding or drag.
Do the rollers rotate correctly?
Replace the Media
Repair or replace
Hope it helps!!