15) Toner Cartridge Is Not Recognized(Error 540,541,542,543); Toner Cartridge Is Not Recognized(Error 540,541,542,543); Errors Caused By Consumables; Errors Caused By Toner Sensor - Oki C8800 Maintenance Manual

7.5.2.(15)

Toner cartridge is not recognized(Error 540,541,542,543)

(15-1) Errors caused by consumables

Confirmation Items
(15-1-1) Installed state of consumables
ID units and toner
cartridges

(15-2) Errors caused by toner sensor

Confirmation Items
(15-2-1) State of toner sensor
Toner sensor
Toner sensor
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 (PRZ) and
PU main board.
• Check an operation again and exchange PU main board or a toner sensor board (PRZ)
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.
43170003TH Rev.2
Confirmation Tasks
Are the ID units installed in the right positions? Check to
see if the lock levers of the toner cartridges are locked.
Confirmation Tasks
Is the toner sensor lens stained with toner?
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.
Oki Data CONFIDENTIAL
Action at NG
Redo the installation
properly.
Action at NG
Wipe off the stain
Replace the toner
sensor PCB (PRZ
PCB), PU PCB or
the FFC between
PRZ and PU PCB.
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