Error code Description Action
121.30 Fuser failed to reach printing temperature by the
time a page reached the fuser.
Go to
“Fuser service check” on page 127.
121.31 Fuser is too hot. Global temperature check.
121.32 Open fuser main thermistor.
121.33 Open fuser edge thermistor.
121.34 Open fuser backup roll thermistor.
121.35 Attempting to POR after receiving a 121.34.
121.36 Fuser did not heat to allow compression jog.
121.37 Fuser heated faster than allowed during line
voltage detection.
Fuser service check
Note: A 121.32 fuser error may occur if the ambient temperature is below the freezing point. Printers are
optimized to operate in an environment where temperature is between 60 and 90°F and relative
humidity is between 8 to 80%.
Action Yes No
Step 1
a Restore the engine settings to their defaults:
Diagnostics Menu > Printer Setup > Defaults
b Restore the EP setup settings to their defaults:
Diagnostics Menu > EP Setup > Defaults
Does the problem remain?
Go to step 2. The problem is
solved.
Step 2
• Check the fuser cables JTHERM1 and JEXIT for proper
connection to the controller board.
• Check the cable PCN5 for proper connection to the power
supply.
Are they properly connected?
Go to step 3. Reseat the cables.
Step 3
Are the cables JTHERM1, JEXIT and PCN5 free of damage?
Go to step 4. Replace the fuser.
See
“Fuser
removal” on
page 276.
4514-330
Diagnostics and troubleshooting
127
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