Oki OL1200, Руководство по обслуживанию

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Service Guide OL1200
Chapter 6 Troubleshooting Procedures
4
Fuser unit error (ERROR 71), (ERROR 72), (ERROR 73)
Turn the power OFF/ON.
Does a fuser unit error occur immediately?
Yes Is the thermistor open or shorted?
Measure the resistance between thermistor contacts.
(About 220 kW at room temperature, 25°C)
(See chapter 7.3 for the measuring points.)
Yes Replace the fuser unit.
A No Does the thermistor contact touch the contact assembly properly when
the fuser unit is mounted in the printer? (See Fig. 6-5.)
No Adjust the thermistor contact so as to touch the contact assembly
properly.
Yes Does appear the heat-on signal at pin 31 (HEAT ON signal: 0 V in normal state) of
the Control board?
No Replace the Control board.
Yes Replace the Power/sensor board.
No Does a fuser unit error occur after more than 90 seconds from the power-on?
No Go to
Yes Turn the power OFF/ON.
Is the heater of the fuser unit turned on? (When the heater is turned on, heat is radiated.)
B Yes Does the thermistor contact touch the contact assembly properly when
the fuser unit is mounted in the printer? (See Fig. 6-5.)
No Adjust the thermistor contact so as to touch the contact assembly
properly.
To on the next flow.
To on the next flow.
From on the preceding flow.
Yes Replace the fuser unit.