Where is the charge corona unit in FP-7715 copier

First it reads it is E3-22 Exhaust fan problem possibly.
Panasonic FP 7713 User Manual Panasonic FP 7713 User Manual

Here is the manual

Do you have can air remove covers exit side of machine, clean vents and remove dust from fans!. If you can remove the fans to clean them better then blowing dust into the machine!!!

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SC 300 Charge corona error - charge corona power pack defective

SC 300 Charge corona error - charge corona receptical defective

SC 300 Charge corona error - charge corona unit defective

SC 300 Charge corona error - replace corona unit and enblock as set

SC 300 Charge corona error - replace Transfer Belt




Replace charge wire and grid or charge assy B2472010 -Carl

C0210 indicates a problem with the Transfer/paper separator corona unit.( the one below the drum)..it is either dirty, not installed properly or may need replacement.

C0100 indicates a problem with the PC Drum charge wire cleaning motor(M21's) failure to turn.
M21 is the motor attached to the corona unit itself...you will see this when the drum unit is slid out of the copier.

the error would be E3-10. this occurs with a high voltage power leak on charge corona unit. either the corona wire is broken or the unit is dirty resulting in high voltage loss. clean or replace as neccesary

Error code means that the cleaner for the transfer corona unit is not working correctly.

You need to clean the charge corona.An eraser will work.I use a folded piece of scotch brite pad held with a pair of hemostats.Be careful not to break the wire.Good Luck!

That could be a few things. Your corona wires might need replacing. Something with the middle transport section, where one of the corona assemblies is at, is not making contact properly. Or it could be the high voltage power supply.

did you tried to restart the copy machine or to disconnect it from electricity for few minutes?