3-58 Phaser 6121MFP Service Manual
Error Messages and Codes
Jam Error Procedures
Check Tray 1 Paper
The leading edge of the media does not reach the registration sensor on time 
after the Tray1 feed solenoid has been energized. This is a feed error at Tray 1.
Applicable Error Code
•Check Tray1 Paper 
Load Paper
or remove top sheet.
Initial Actions
Follow the directions in “Initial Actions for Jam Errors” on page 3-56.
Procedure
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Registration Sensor, PL7.2.3
■ Tray 1 Pick-up Solenoid, PL6.0.19
■ Engine Control Board, PL13.0.20
■ Board Locations (page 2-10)
■ Sensors and Switches (page 2-11)
■ Motors, Fans, and Solenoids 
(page 2-12)
■ Imaging Wiring (page 10-15)
■ Map 1 - Engine Control Board 
Plug/Jack Locator (page 10-5)
Troubleshooting Procedure Table
Step Action and Questions Yes No
1 Check the media.
Is the paper damp or the 
incorrect media for the printer?
Replace with 
paper that meets 
the specifications 
for the printer. If 
the problem 
persists, go to step 
2.
Go to step 2.
2 Check the Engine Control Board 
connectors P/J10 and P/J12.
Are the connectors seated 
properly?
Go to step 3. Reseat the 
connectors. If the 
problem persists, 
go to step 3.