Oki OKIPAGE24DX Maintenance Manual page 129

4
Fuser unit error (ERROR 71), (ERROR 72), (ERROR 73)
• Turn the power OFF/ON.
• Does a fuser unit error occur immediately?
• Yes
A
•
• Yes
• Yes
• No
• Yes
• Is the heater of the fuser unit turned on? (When the heater is turned on, heat is radiated.)
•
B
To on the next page
To on the next page
40930701TH DRAFT Vesion
Is the thermistor open or shorted?
Measure the resistance between thermistor contacts.
(About 220 k at room temperature, 25 C)
(See Chapter 7.3 for the measuring points.)
• Yes Replace the fuser unit.
No Is a cable of the thermistor connected to "CN8" connector on the
Power Supply Unit (High Voltage)?
Is there any flaw on the cable of the thermistor ?
• No Adjust the thermistor contact so as to touch the contact assembly
properly.
Does appear the heat-on signal at pin 6 (HEAT ON signal: 0 V in heater on
state) of the POWER connector on the Main board?
• No Replace the Main board.
Replace the Power Supply Unit (High Voltage).
Does a fuser unit error occur after more than 120 seconds from the power-on?
• No Go to
A
Turn the power OFF/ON.
• Yes Is a cable of the thermistor connected to "CN8" connector on the
Power Supply Unit (High Voltage)?
• No Is a cable of the heater connected to "CN2" connector on "Power
Supply Unit" (120V or 230V)
B
.
A
.
148 /