Oki Data CONFIDENTIAL
44158801TH Rev.2
258 /
8.5.2.(15)
Toner cartridge is not recognized(Error 540,541,542,543)
(15-1) Errors caused by consumables
Confirmation Items
Confirmation Tasks
Action at NG
(15-1-1) Installed state of consumables
ID units and toner
cartridges
Are the ID units installed in the right positions? Check to
see if the lock levers of the toner cartridges are locked.
Redo the installation
properly.
(15-2) Errors caused by toner sensor
Confirmation Items
Confirmation Tasks
Action at NG
(15-2-1) State of toner sensor
Toner sensor
Is the toner sensor lens stained with toner?
Wipe off the stain
Toner sensor
Use the SWITCH SCAN function of the diagnostic mode
to check to see if the sensor is normal. Hold a white
paper in front of the sensor, and see if the SCAN state
varies.
Replace the toner
sensor PCB (PRZ
PCB), PU PCB (PRF
PCB) or the FFC
between PRZ and
PRF.
Note!
How to check a toner sensor operation with SWITCH SCAN in the self-diagnosis mode.
(
1) Confirmation of the operation in the device
1) Change to a display that a changing situation of the toner sensor is confirmed from the
operation panel in the self-diagnosis mode.
Refer to Section 5.4.2.3 Switch Scan Test as for how to display the operation panel.
2) When taking out an ID unit and toner cartridge (TC) from the device, there is a window on
the observers’ right from the device, in a position across to the side of the TC.
In that window, a toner sensor is located.
3) Hold up a piece of white paper against a sensor in a place within 3mm from a sensor
window.
4) The operation panel displays “L” if a piece of paper has light reflection and it displays “H” if
not.
5) By holding up a piece of paper, if the operation panel changes “H”to “L” or “L” to “H”, the
device operates normally.
Response in NG:
• Clean a toner of the sensor surface and clear paper dust.
• Confirm a connection state of FFC cable between the toner sensor board (PRF) and PU
main board (PRZ).
• Check an operation again and exchange PU main board (PRZ) or a toner sensor board (PRF)
if there is no change.
(2) Confirmation of the operation in Toner Cartridge (TC)
1) Install a TC and ID unit in a position where normal operation of the device has confirmed in
Confirmation (1) and check operation in the operation panel.
2) The display of the operation panel changes “H” to “L” or “L” to “H” in conjunction with an action
of TC white light reflector when operation of TC is normal.
Response in NG:
• Confirm an operation state of each ID motor by MOTOR&CLUTCH TEST in the self-
diagnosis mode.
• Clean the surface of the white light reflector at the side of TC. (Dirty from a toner or paper
dust.)
• Exchange a TC of a different color and ID unit by the set.
Exchange a TC or ID unit if the set of the different color is OK.