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
4514-330
Diagnostics and troubleshooting
127
Summary of Contents for MS312
Page 11: ...Part number index 335 Part name index 339 4514 330 Table of contents 11 ...
Page 12: ...4514 330 Table of contents 12 ...
Page 182: ...4514 330 182 ...
Page 214: ...5 Remove the three screws B and then remove the left front mount B 4514 330 Parts removal 214 ...
Page 230: ...5 Remove the four screws B and then remove the right front mount B 4514 330 Parts removal 230 ...
Page 234: ...b Set the spring over the plunger 4514 330 Parts removal 234 ...
Page 240: ...3 Squeeze the latches B to release the left and right links B 4514 330 Parts removal 240 ...
Page 267: ...11 Disconnect the two springs D D 4514 330 Parts removal 267 ...
Page 284: ...3 Swing the right cover backward to remove 4 Remove the screw D 4514 330 Parts removal 284 ...
Page 286: ...4514 330 286 ...
Page 291: ...4514 330 291 ...
Page 293: ...Assembly 1 Covers 4514 330 Parts catalog 293 ...
Page 295: ...Assembly 2 Electronics 1 1 2 3 4 5 7 8 9 6 4514 330 Parts catalog 295 ...
Page 297: ...Assembly 3 Electronics 2 4 3 2 1 6 5 4514 330 Parts catalog 297 ...
Page 299: ...4514 330 Parts catalog 299 ...
Page 300: ...Assembly 4 Frame 2 5 6 9 10 11 13 14 12 8 1 4 4 3 7 4514 330 Parts catalog 300 ...
Page 302: ...4514 330 Parts catalog 302 ...
Page 303: ...Assembly 5 Option trays 3 4 5 6 1 2 4514 330 Parts catalog 303 ...
Page 306: ...4514 330 Parts catalog 306 ...
Page 308: ...4514 330 308 ...
Page 312: ...4514 330 312 ...
Page 314: ...4514 330 314 ...
Page 326: ...4514 330 326 ...
Page 338: ...4514 330 Part number index 338 ...
Page 342: ...4514 330 Part name index 342 ...