Oki Data CONFIDENTIAL
42049001TH Rev.1
81 /
5
Fuser Unit Error
•
Does a fuser unit error occur immediately after the printer is turned on?
(A)
•
YES Is the heat roller thermistor broken or short-circuited (see figure 5-1)? (approx. 190 k to 980
k
Ω
at room temperatures of 0 to 43˚C)
•
YES Replace the fuser unit.
▼
•
NO
▼
•
NO
Does a fuser unit error occur about one minute after printer is turned on?
•
NO
Go to (A).
▼
•
YES
Is the heater of the fuser unit on (Is it hot)?
•
YES Replace the engine board. Has the problem been corrected?
•
YES End.
▼
•
NO
Replace the fuser unit.
▼
•
NO
Is AC voltage being output between the low voltage unit CN2 connector pins 1 and 3?
•
NO
Replace the low-voltage power unit. Has the problem been corrected?
•
YES End.
▼
•
NO
Replace the engine board.
▼
•
YES
Replace the fuser unit.
Figure 5.1
▼
Heat Roller Thermistor
The resistance between these two pins
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