Oki C3530nMFP Maintenance Manual page 29

Confirmation 1
Confirmation 2
• DENS SHUTTER ERR
Confirmation 3
• DENS ID ERR
Confirmation 4
Toner Sensor Detection Principle
Detection of the low toner is performed by the toner sensor (light reception sensor) installed
inside the equipment and the luminous LED installed inside the cartridge. The shading board is
installed inside the ID and rotates synchronizing with the toner stir. A shutter is attached to the
ID. The shutter synchronizes with the cartridge operation lever and the toner sensor can detect
whether the cartridge is installed properly. If the toner sensor is stained by the toner, etc., or the
43605601TH Rev. 1
When the above is displayed, check connection of the sensor cable.
If the connection is found abnormal, correct it to the normal state.
Check the surface of the sensor to confirm if it is stained by the
toner, paper dust, etc. If stained, wipe the surface neatly.
Confirm adequacy of the opening and shutting of the sensor
shutter by MOTOR&CLUTCH TEST of the maintenance utility. If a
malfunction is found, replace the shutter unit.
Remove the ID unit to confirm if the surface of the drum is covered
with abnormal amount of toner. Then, replace the LED head if the
focus blurs or replace the ID unit.
When a new ID unit is to be used for trial, attach a treatment device
to the ID unit lest the fuse breaks ( refer to p.132).
Oki Data CONFIDENTIAL
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