Oki Data CONFIDENTIAL
42615101TH Rev.8
218 /
7.5.2.(10)
Fuser Unit Error(Error 170-177)
(10-1)An error occurs right after turning on the power
Upper thermistor, lower
thermistor, frame thermistor
Installation status of the fuser
unit
Confirmation Tasks
Confirm whether each thermistor is short or open status.
Check the resistances by connector pins at the bottom of the
fuser unit. (See an attached figure)
Upper thermistor
Approx. 590K
Ω
-5338K
Ω
between2pin-3pin
Lower thermistor
Approx. 190K
Ω
-980K
Ω
between 5pin-6pin
Frame thermistor
Approx. 23.1K
Ω
-162K
Ω
between 8pin-9pin
Confirm that a fuser unit is inserted in a position to which a
connector at the bottom of the fuser unit connects.
Action at NG
Exchange the fuser
unit.
Use FUSE KEEP
MODE of the system
maintenance menu
when using a new fuser
unit as a test.
Reinstall the fuser unit.
(10-1-1)Failure of the thermistor
Confirmation Items
(10-2)An error occurs in 1 min. from turning on the power
Thermostat, Halogen lamp
Installation condition of the
upper thermistor
Installation condition of the
lower thermistor
AC voltage of the low voltage
power
ON signal of the heater
offered to the low voltage
power from PU
Confirmation Tasks
Confirm that a fuser unit is hot by a heater control of the fuser
unit with a touch of it.
Confirm that a value of resistance between 1 pin- 7pin of the
connector is about 10
Ω
.
Confirm whether a temperature to be measured is low because
an installation position is further away from the regular position.
Check a sensor such as warping by removing the cover of the
heater.
Confirm whether lower temperature than the regular is detected
since the lower thermistor which should be connected is not.
Confirm that AC voltage for the heater is normally offered.
AC OUT connector between 1pin-3pin of the power.
Confirm that ON signal of the head gear is activated at the
timing of warming up. It is "L"-active during ON. POWER
connector 18pin of the PU board (PRN PCB).
Action at NG
Exchange the fuser
unit.
Use FUSE KEEP
MODE of the system
maintenance menu
when using a new fuser
unit as a test.
Exchange the fuser
unit.
Use FUSE KEEP
MODE of the system
maintenance menu
when using a new fuser
unit as a test.
Exchange the fuser
unit.
Use FUSE KEEP
MODE of the system
maintenance menu
when using a new fuser
unit as a test.
Exchange the low
voltage.
Exchange the PU
board (PRN PCB).
(10-2-1)Temperature rise of the fuser unit
(10-2-2)Temperature rise of the fuser unit
(10-2-3)AC inputs for Halogen
Confirmation Items
Summary of Contents for C3200n
Page 1: ...Oki Data CONFIDENTIAL C3200n C5150n C5200n C5400n C5510MFP Service Manual 060125A...
Page 2: ...42615101TH Rev 8 2 Oki Data CONFIDENTIAL...
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Page 43: ...42615101TH Rev 8 43 Oki Data CONFIDENTIAL C5510 Handle Holes each on side or on end...
Page 65: ...42615101TH Rev 8 65 Oki Data CONFIDENTIAL Sample In case of C5200 C5150 C3200n...
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