Ch error Sharp ar-m160: its indicator screen displays "ch" what does it mean?

may be Thermistor abnormality Heater lamp abnormality Thermostat abnormality Control PWB abnormality

Below are the F2 errors and causes for Sharp AR-M160

"F2-31" Image density sensor fault
"F2-32" Drum mark sensor fault
"F2-33" Grid voltage correction problem
"F2-35" Grid voltage correction problem
"F2-37" Drum mark sensor fault

Cause : CRUM chip defect OR Improper developing unit
Check and remedy : As you have already replaced the tonner, we can suggest Replace the CRUM chip,Replace the developing unit

Regards,
Shrey

ch-
1.side door open
2.developing cartridge not installed
L1-
scanner feed trouble

L1-
scanner feed trouble &
CH-
side door open

Check the correct instalation of the developing unit.

CH steady means cover is open. Close either front or right cover well.
CH blinking means developer unit or toner cartridge not installed. Remove and return well and firmly.

Hello sir; CH it means somewhere the door is open, check it out all the door inside and outside.

Clearing a trouble code on a AR-M160 is a little different than the AR160.

Try "#" "interrupt" "clear" "interupt" "1" "4" "start key"

This should clear the error. Even if you replace the fusion unit you will need this code to clear the error

L6 error on AR-M160 - Polygon motor problem.

I would suggest repairman service for this one as it requires stripping the unit down.

Try reseting the error first though.

"#" "interupt" "clear" "interupt" "1" "4" "start key"

U2 is normally a user error (hence U) check that all the doors are closed fully and just recheck the toner installation. If this is all correct it might be a slight possibility that the toner cart is faulty.

Thanks J