Fuser Service Check - Lexmark X543 Series Service Manual

Fuser service check

Step Questions / actions
1 Some low-voltage power supply FRUs have a
voltage selector switch. If it does, the switch
needs to be set to the correct voltage for your
area
Has the LVPS been changed?
2 Turn the printer off, and remove the rear shield.
See "Rear shield removal" on page
Check the cable at JFUSES1 for proper
connection to the controller board, the cable for
pinch points, and the cable or connector for
any other damage.
Is the cable damaged?
3 Check the connector JLVPS1 for proper
connection to the controller board, the cable for
pinch points, and the cable or connector for
any other damage.
Is the cable damaged?
4 Check the power cable on the left side of the
fuser and the thermistor cables and
connections on the right side of the fuser.
Are the cables or connectors damaged?
5 Disconnect the cable at JFUSES1 on the
controller board, and check the following
voltages:
Pin
10
11
Are the voltages correct?
6 Replace the fuser. See
removal" on page
Does the error clear?
4-7.
JFUSES1
Voltage
5 +3.3 V dc
6 Ground
8 Ground
+2.7 V dc
Ground
"Fuser assembly
4-19.
Yes
Check the switch on the side
of the LVPS to verify the
correct voltage is set.
Replace the fuser cable.
Repair or replace the LVPS
cable. See "Low-voltage
power supply (LVPS)
assembly" on page 4-31.
Repair the cables. If the
cables cannot be repaired,
replaced the fuser. See
"Fuser assembly removal"
on page 4-19.
Go to step 6.
Problem resolved.
7525-xxx
No
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Replace the controller
board. See "Controller
board removal" on
page 4-16.
Replace the controller
board. See "Controller
board removal" on
page 4-16.
2-41
Diagnostic information