FS-C5025N left cover removal. 1. Open the rear cover. 2. Open the top cover. 3. Remove the opening and closing axis from the main unit frame and then remove the top cover. It pry's out at the hinges. 4. Open the left side cover and then remove the one screw. 5. Remove the waste toner box. To remove waste toner box, press the lock lever in. 6. Remove the paper feed unit .
That is a Toner motor K error: Over-current at toner motor K is detected for 80 ms in total while toner motor K is ON.
It may be caused by Defective drive transmission system of the toner motor K.
Check if the gears rotate smoothly. If not,grease the bushings and gears. Check for broken gears and replace if any.
If this does not help, please replace the toner motor K
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