Troubleshooting
6 - 26
OL600e/610e/610e-PS/610e-S
Service Manual, P/N 59271602
4
Fusing Unit Error (ERROR 71, 72 and /or 73)
• Turn the power off, then back on.
• Does the fusing unit error occur immediately?
• Yes
Is the thermistor open or shorted?
Measure the resistance between
thermistor contacts (about 220k
Ω
at
room temperature) (see Fig. 6-2 or
see 7.3).
• Yes Replace the fusing unit.
▼
• No
Do the thermistor contacts touch the contact assembly properly when the
fusing unit is mounted in the printer (see Fig. 6-4 contact
F
)?
• No
Adjust the contact.
▼
• Yes
Replace the Main Control PCB or power supply board.
▼
• No
Does the fusing unit error occur about 60 seconds after the power is turned on?
• No
Check the thermistor for poor contact or replace the Main Control PCB.
▼
• Yes
Turn the power off, then back on.
• Is the heater of the fusing unit turned on (when the heater is turned on, light is emitted)?
• Yes
Check thermistor contacts or replace the Main Control PCB or the fuser unit.
▼
• No
Is the heater or the thermostat open?
Measure the resistance between the heater contacts (normal resistance: about 0
Ω
)
(see Fig. 6-2 or see 7.3).
• Yes
Replace the fusing unit.
▼
• No
Is the AC voltage being supplied to the contacts for the heater of the contact assembly?
(Refer Fig. 6-2)
• No
Replace the Main Control PCB or the power supply board.
▼
• Yes
Check the heat contact of the fusing unit and the contact assembly for poor contact
(see Fig. 6-4 contact
G
).
Figure 6-2
Themistor contacts
Heater
contacts
