Error Occurs During The Down Movement Of The Id Unit; Fuser Unit Error (Error Code: 167 To 177); Error Occurs Immediately After The Power Is Turned On - Oki MC873dn Maintenance Manual

Oki Data CONFIDENTIAL
Check item
(4-1-3) Sensor check
Up/Down sensor Check if shape and movement of the sensor
lever (unified levers have any abnormality or not.
structure with the left
link lever)
Up/Down sensor Confirm that the sensor signals are normally
detected by using the SWITCH SCAN function of
the self-diagnostic mode.
Check if the SCAN state changes or not when
the incoming light is interrupted/passed by using
a piece of paper or the like for the transparent
type sensor.
(4-2)

Error occurs during the Down movement of the ID unit

Check item
(4-2-1) Check the mechanical load during the Down movement
Mechanical load Check if abnormal heavy load is applied when
during installation removing the ID unit.
and removal of the
ID unit
Greasing to the right Check if the slant surface of the link lever is
and left Up/Down coated by grease or not.
link levers
Assembled condition Check if any part exists or not in the vicinity of
of the right and left link lever, that hampers movement of the link
Up/Down link levers lever.
45850101TH Rev.1
Actions to be taken
Check work
at NG
Replace the left
link lever.
Replace the high
voltage board.
Actions to be taken
Check work
at NG
Replace the ID
unit, or replace
the right/left side
plate.
Apply grease.
Assemble them
correctly.

2.5.5. (5) Fuser unit error (Error code: 167 to 177)

(5-1)

Error occurs immediately after the power is turned on.

Check item
(5-1-1) Thermistor is defective Note)
Upper thermistor, Check the respective thermistors if they are
lower thermistor, shorted or opened internally.
side thermistor, Check the resistance value at the connector pins
heater thermistor in the bottom of the fuser unit.
(Refer to section 6.3 Resistance value (fuser
unit).)
Installed condition of Check if the fuser nit is pressed in until the
fuser unit. connector in the bottom of the fuser unit is surely
connected.
Note! 168: Error, 169: Error, 171: Error, 173: Error, 175: Error, 177: Error can occur
when the printer temperature is below 0˚C. Turn on the power again after the
printer temperature has increased.
2. TROUBLESHOOTING PROCEDURES
Actions to be taken
Check work
at NG
Replace the fuser
unit.
If any attempt of
using new fuser
unit as a trial
is going to be
made, be sure to
use the System
Maintenance
Menu FUSE
KEEP MODE.
Re-set the fuser
unit.
2-65