Error Messages and Codes 3-27
Fuser STS (Front) Warm Time Failure, Code 42
Main heater warm-up error. The temperature did not reach the “Ready” temperature
within the specified time.
Fuser SSR1 On Time Failure, Code 43
The main heater remained ON for more than the specified time.
Troubleshooting References
Applicable Parts Wiring and Plug/Jack Map References
■ Fuser
■ Engine Control Board
Troubleshooting Procedure
Step Actions and Questions Yes No
1
1. Turn OFF power, remove the Fuser
Assembly and allow it to cool down.
2. Measure the resistance between the
Fuser connector P600-4 and P600-6.
3. Does the resistance measure between
30 K and 190 K Ohms?
Go to step 2. Replace the fuser
assembly.
2
1. Measure the resistance between fuser
connector P600-1 and P600-12.
2. Does the resistance measure 20 Ohms
or less?
Go to step 3. Replace the fuser
assembly.
3
1. Reinstall the fuser assembly.
2. Enter service diagnostics.
3. From the Sensor Tests run the Fuser
Temperature test.
4. Is the temperature indicated
approximately 165
o
C?
Go to step 5. Go to step 4.
4
1. Turn OFF the printer power.
2. Check for an open circuit or poor
connection between J641-2 and
J404A-2.
3. Is the wiring OK?
Replace the
engine control
board.
Repair or replace
the wiring
harness.
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