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Below the drum is a assy. which has two/three very fine wires each carries a High Voltage (Only) during the copy process. the paper goes between these wires and the drum. The wires allow the paper to steal the image off the drum. Well these wire can become dirty, so they have a motor that runs a small cleaning pad across them, your code deals with that open the center section should see the assy. might be the one of the cleaning pads is stuck, the pads work go from one side (Rear to front/front to rear) to the other and back job done. Is the pad in the middle or stuck.
Remove the assy. and bring the pad to the front. Also can allow the motor not to do anything. In service mode 25.
What do you mean yo cleaned the control board?? Did you remove it????? IF you did major problem a Will have to go back and remove each connector looking for a bend pin and ensuring each connector is properly seated. Never remove board unless required. As for the code: please check code could not find in the service manual
Directly below the drum section is assemble called the transfer/separation assy. the purpose of this unit is two fold. (It houses to very thin gold plated wires) One wire is what helps the transfer of the image from the drum to the paper. Since the paper goes between this wire and the drum, the second wire prevent the paper from sticking to the drum during the transfer process. The code you have been getting means either wire mite be broke, has to cleaned (because of all the toner on it from the drum assy. which need to removed and cleaned. Or The end blocks that hold the wires are getting old and allowing the High Voltage that is applied to the wire during the copy/print process are breaking down allowing the high voltage to ground. Open close the front door to clear. if it comes back have qualified tech look at it.
mam/sir Have you had the developer and drum replaced or does the screen say Replace PC Drum? There are certain house chores the copier does before "Ready to Copy" it is waiting for them to get done equals "Please Wait". One big item is making sure the developer and toner are properly mixed inside the image unit underneath the drum. Might want to have the developer replaced and drum/cleaning blade normally done all together, then run the F8 procedure and make sure the counters where cleared Did you recently replace the drum and the developer if so did you clear the counters for the drum and developer. IF not then the copier thinks the new drum and new developer are old. Copier works on the counters that how it know it got a new drum and developer. Get new develop and new drum and have it installed correctly, Counters are clear before the unit is yanked out of the machine, then you remove the image unit/drum unit replace the developer/drum and cleaning blade. (DO NOT USE AVACUUM CLEANER WHEN REPLACING THE DEVELOPER static electricity can destroy the sensor located below the developer unit. Then reinstall and RUN F8. Make sure the fax line and Ethernet cable is removed can't print anything until the F8 is run. Or you start over with new developer and new drum
Has the drum been replaced? IF not then recommend that the counter not be reset because the copier use the counters to determine voltages for certain assy. like drum and developer unit, so if you reset the counters with out replacing the parts the machine will give codes and provide bad copy quality issues. Reset code is the only way the machine knows it got new parts
This M4 code means that your drum life is over. You have run 80,000 copies or more on the drum. If you have a local service company available then I would just have them come out and clean the machine and reset the counter. This is especially true if your copies were still fine prior to the machine shutting down. Service mode entry and navigation is rather complicated on this machine so I do not feel comfortable trying to walk you thru the reset process.
Good Luck and Thank You for using Fixya.
This means that the drum has reached it life count of 80,000 copies. If your copies are good and the machine is still making copies the you can just ignore the M4 as if you are in the USA then the factory settting allows you to continue making copies. If the M4 appeared and you can NOT make copies then you will need to get into the service mode to turn the disable copy feature off or reset the count for the drum unit. Just let me know what your situation is and if need be we can walk you thru the reset. I just don't recommend this action unless it is absolutely necessary.