Diagnostic information 2-39
Fuser service check
Step Questions / actions Yes No
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?
Check the switch on the
side of the LVPS to verify
the correct voltage is set.
Go to step 2.
2
Turn the printer off, and remove the rear
shield. See “Rear shield removal” on
page 4-7. 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?
Replace the fuser cable. Go to step 3.
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?
Repair or replace the LVPS
cable. See “Low-voltage
power supply (LVPS)
assembly” on page 4-43.
Go to step 4.
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?
Repair the cables. If the
cables cannot be repaired,
replaced the fuser. See
“Fuser assembly
removal” on page 4-25.
Go to step 5.
5
Disconnect the cable at JFUSES1 on the
controller board, and check the following
voltages:
Are the values approximately correct?
Go to step 6. Replace the controller
board. See “Controller
board removal” on
page 4-18.
JFUSES1
Pin Value
1 +24 V dc (doors closed)
2 +24 V dc (doors closed)
3 +24 V dc (doors closed)
4 +24 V dc (doors closed)
5 Between 0.6 and 3.28 V dc
6 Ground
8 Ground
10 Between -3 and +3.3 V dc
11 Ground (no wire
Y112730-2
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