Service Checks; 122.Xx-Fuser Temperature Incorrect; 90X.xx Error - Lexmark C540 Service Manual

5025-2xx, 4xx

Service checks

122.xx—Fuser temperature incorrect
This service check covers fuser temperature errors, including 122.xx.
Step Questions / actions
1 Check the clearance around the printer. See
"Clearances" on page 1-5
below:
Description
Rear
Front
Right side
Left side
Above
Does the error clear?
2
Check the fuser connections on the fuser, at
JFUSES1 on the controller board, and the AC
connection at the LVPS.
Are the connections correct?
3 Turn the printer on, and then check the
following values at JFUSES1.
Pin Value
5 Between +0.6 V dc and +3.28 V dc
6 Ground
8 Ground
9 +3.3 V dc
10 Between +0.6 V dc and +3.15 V dc
11 Ground
Are these values approximately correct?

90x.xx error

Step Questions / actions
1 Turn the printer off, and remove the rear
shield. See "Rear shield removal" on
page 4-11. Check the cable connections.
Are all the cable connections secure?
2-24
Service Manual
or check the chart
Dimensions
102 mm (4 in.)
508 mm (20 in.)
152 mm (6 in.)
76 mm (3 in.)
254 mm (10 in.)
JFUSES1
Yes
Problem resolved.
Replace the fuser. See
"Fuser assembly
removal" on page 4-26.
Replace the fuser assembly.
See "Fuser assembly
removal" on page 4-26.
Yes
Replace the controller
board. See "Controller
board removal" on
page 4-19.
No
Make sure the proper
clearance is maintained.
Problem resolved.
Replace the controller
board. See "Controller
board removal" on
page 4-19.
No
Securely make all the
connections. POR the
printer.