Question about OKI C9300 Led Printer
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Posted on Jan 02, 2017
Check the little switch/door on the left hand side of the drums.
This has worked successfully for me.
After replacement of a C3530 Image Drum, the message, "Toner Sensor Error" is displayed.
The plastic shutter in the ID is fully or partially covering the toner sensor window.
Move the cover upward to allow for the sensor to become fully exposed prior to reinstalling the drum.
Posted on Dec 07, 2008
SOURCE: 543k toner sensor error
Your indication regarding the 100% does not necessarily indicate a damaged chip (sensor).
Many chips do not work by actually sensing the toner but by usage or other tricks.
We cannot be sure about what happened but replacing the drum and affected items
should solve the problem. Needed parts may be found at
Posted on Feb 23, 2009
I had a customer with that problem and the issue was the toner cartridge. If you take it out of the photoconductor unit and look on the end there should be a metal connector tab. If you look on the left side of the photo unit you will see metallic contact points that need to connect to the metal tab. Oki has several toners that will physically fit in the B4600 but they have to be the ones with the metal tab to work right or you get the error. The correct toner part numbers are: 43502301 or 43502001
Check your toner for the tab is that is not the problem, get back with me and we can go from there.
Posted on Aug 07, 2009
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