Toner Cartridge Cannot Be Recognized. (Error Code C3B3,C3A3,C393,C383); Error Caused By The Consumable Items; Error Caused By The Toner Sensor - Oki MC760 Maintenance Manual

7.5.4. (16) Toner cartridge cannot be recognized. (error code C3B3,C3A3,C393,C383)

(16-1) Error caused by the consumable items.

Check item
(16-1-1) Consumable items installation condition
ID unit and toner Check that the ID unit is installed in the normal
cartridge position. Check that the lock lever of the toner
cartridge is locked.

(16-2) Error caused by the toner sensor

Check item
(16-2-1) Toner sensor condition
Toner sensor Is the receptor of the toner sensor stained?
Toner sensor Confirm that the toner sensor works normally by
using the SWITCH SCAN function of the self-
diagnostic mode.
Place a white paper in front of the toner sensor,
and check if the SCAN state changes or not.
Action to be taken
Check work
at NG
Correct the
installation to
the normal
installation
condition.
Action to be taken
Check work
at NG
Wipe off the
stain from the
toner sensor.
Replace the
toner sensor
board, or the PU
board, or the
FFC between
the toner sensor
board and the
PU board.
Note! Toner sensor operation check method using the SWITCH SCAN function of
the self-diagnostic mode.
(1) How to check operation of the toner sensor at the printer side.
1. Status change of the toner sensor can be checked from the Operator
Panel using the self-diagnostic mode. First, switch the display to the
Operator Panel display. For the method of switching the display to the
Operator Panel display, refer to section 5.3.2.3 Switch Scan Test
2. Remove the ID unit and the toner cartridge (TC) from a printer. There is
a window inside a printer opposing the ID side when viewed from the
front of a printer. The toner sensor is located inside the window.
3. Place a white paper 3 mm away from the sensor window. The white
paper should be placed in the manner of opposing the toner sensor.
4. When light is reflected by a white paper so that incident light falls on the
toner sensor, the Operator Panel display shows "L". When the paper is
moved so that any light is not reflected by the paper so that the incident
light does not reach the toner sensor, "H" is displayed on the Operator
Panel.
5. If the Operator Panel display toggles between "H" <-> "L" as a paper is
flipped in front of the toner sensor, it indicates that the toner sensor and
the related system of the printer are working normally.
Action to be taken at NG
• Clean surface of the toner sensor to remove the stains due to residual
toner and paper dust.
• Check the connection condition of the FFC cable at the PU board and
at the toner sensor board (PRZ).
• Perform the operation check again. If the situation is not improved and
remains unchanged, replace the PU board or the toner sensor board
(PRZ).
(2) How to check operation of the toner sensor at the toner cartridge (TC) side
1. To the position where the toner sensor is confirmed to be operating
normally in the printer itself by the above paragraph (1), install the TC
and the ID unit to check operations by observing display on the Operator
Panel.
2. If the ID unit works normally, the display on the Operator Panel will
toggle between "H" <-> "L" in synchronism with movement of the silver
reflector plate that is located on the side of the ID.
Action to be taken at NG
• Check operation condition of the respective ID motors by using the
Motor & Clutch Test of the self-diagnostic mode.
• Clean surface of the silver reflector plate on the side of ID to remove
stains. (Stain due to toner or paper dust)
• Replace the TC of different color and the ID unit as a pair.
If a satisfactory operation is attained by using the a pair of TC of
different color and the ID unit, replace the TC or replace the ID unit.
7. Troubleshooting and repair procedure
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