Service Checks; Autocompensator Mechanism Service Check; 90X.xx Error; 920.Xx-923.Xx-Fuser Temperature Incorrect - Lexmark X543 series Service Manual

7525xxx

Service checks

Autocompensator mechanism service check

Step Questions / actions
1 Turn the printer off, and then remove the rear
shield. See "Rear shield removal" on
page 4-7. Check the cable at JSP1 on the
controller board for proper connection.
Is the cable properly connected?
2 Did the printer function correctly after
reconnecting the cables?
3 Turn the printer on, and then verify the
following approximate values at JSP1:
Pin Value
2 +24 V dc
4 +24 V dc
6 Ground
7 Ground
8 Ground
Are the 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
Check the cable connections.
Are all the cable connections secure?
920.xx–923.xx—Fuser temperature incorrect
This service check covers fuser temperature errors, including 920.xx, 921.xx, 922.xx, and 923.xx.
Step Questions / actions
1 Check the clearance around the printer. See
"Clearances" on page
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?
2-32
Service Manual
JSP1
Pin Value
10 +5 V dc
13 Ground
15 +5 V dc
16 Ground
4-7.
1-5.
Lexmark confidential until announce
Yes
Go to step 3.
Problem resolved.
Replace the
autocompensator
mechanism. See
"Autocompensator
mechanism (ACM)—
standard tray removal" on
page 4-12.
Yes
Replace the controller
board. See "Controller
board removal" on
page 4-16.
Yes
Problem resolved.
Replace the fuser. See
"Fuser assembly removal"
on page 4-19.
No
Properly connect the cables,
and POR the printer.
Go to step 2.
Go to step 3.
Replace the controller
board. See "Controller
board removal" on
page 4-16.
No
Securely make all the
connections. POR the
printer.
No
Make sure the proper
clearance is maintained.
Problem resolved.