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May want to remove the transfer/separation assy. directly below the drum, the paper during the copy cycle goes between this assy. and the drum. the assy. provides a high voltage below the paper to allow the toner to attach itself the paper. Clean the very, very thin wires inside the assy. with a pencil eraser be gentle or they will break and need to go find Corona wires for the transfer/separation assy. for EP5000, try below web site. Also has the developer and or drum been replaced? also clean the mirrors under the big glass, be careful can use Windex. Again be careful. do not ruff up the mirrors they are aligned. Precision Roller Printer Toner Cartridges Parts and Supplies Office...
When was the last time the developer was replaced in the developer unit? If it has been replaced then you might have a bad ATDC (Automatic Toner Density Control) sensor Located right below the developer unit. If the developer was replaced when it was done was a vacuum cleaner used? IF so the static electricity from the vacuum clear destroyed the sensor, NEVER USE a VACUUM cleaner to remove the developer. Also when the developer was replaced, was counter cleared to tell the copier developer was replaced, the copier use the counters to determine certain voltages for certain assemblies, if not image problems and codes can appear. Finally was the F8 run after the developer was installed before any prints or copies made? If not buy new developer and start over, counter is to be cleared first, then developer replaced, then F8 run.
C - 0100 Charge corona wire winding failure. C - 0200 PC drum charge,Image transfer/paper separator coronas failure. Clean the coronas wire and the coronas house using isoprophil alcohol and clean or change the contact combs(a little Cu pieces) If you enter in service mode and select Counter mode you can reas the trouble code list description.
If fuser rollers are getting hot - you either lack pressure between upper and lower rollers Restart; remove/dump old developer - instal correct compatible starter reinstal imaging unit remove toner ctg. key in stop 0 stop 1 tec rep run F-8 mode runs apx. 2 min. exit svc mode If whats not fusing is gritty(starter) - other issues