HP 3500 Series

ENWW Printer error troubleshooting 331
50.X FUSER ERROR
alternates with
For help press
A fuser error has occurred.
X Description
1 - low fuser temperature
2 - fuser warmup service
3 - high fuser temperature
4 - faulty fuser
8 - low fuser temperature
(subthermistor
9 - high fuser temperature
(subthermistor)
WARNING: The fuser is HOT. Turn the
printer off and allow it to cool for
approximately 10 minutes before removing
the fuser.
50.1 error - Fuser failure (Abnormally Low
Temperature Main Thermistor), perform the
following steps:
1. The connector between the fuser and the
printer is not connected properly. Reseat the
fuser. Check the connector J5013 between
the fuser and the printer. Replace it if
damaged.
2. Break in the main thermistor. Turn the
printer off and remove the fuser. Measure the
resistance between the fuser connectors
J5013LA-2 (MAINTH) and J5013LA-1
(GND). If it is not within the rage of 330k
ohms to 50k ohms (at ambient temperature),
replace the fuser.
3. Faulty DC controller PCB. Replace the DC
controller PCB.
50.2 error - Fuser Failure (Abnormal Warm-
up)
1. The connector between the fuser and the
printer is not connected properly. Reseat the
fuser. Check the connector J5013 between
the fuser and the printer. Replace it if
damaged.
2. Break in the main thermistor. Turn the
printer off and remove the fuser. Measure the
resistance between the fuser connectors
J5013LA-2 (MAINTH) and J5013LA-1
(GND). If it is not within the rage of 330k
ohms to 50k ohms (at ambient temperature),
replace the fuser.
3. Break in the fuser heater. Measure the
resistance between the fuser connectors
J5013L-2 (FSRH) and J5013L-1 (FSRN) with
the fuser removed. If it is not within the rage
of 12 ohms to 52 ohms (at ambient
temperature), replace the fuser film unit.
4. Faulty DC controller. PCB Replace the DC
controller PCB
Table 7-3 Numerical printer messages (continued)
Message
Description Action