Sharp copier al1631 , putin new toner sometimes shows CH

the door is open

check for empty toner... and if the laser lamp is dim or out... the laser lamp is the lamp that comes on when you copy from the glass table or through the document feeder

I’m happy to assist further over the phone at https://www.6ya.com/expert/norman_d2fa496dce30c65d

Ch means the side door is not closed or the toner is not installed correctly.

Install the developer unit and toner cartridge properly and close the copier side covers well ie the front and the right covers.

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.

Many copiers will do this if you have run out of toner.Copiers will turn over trying to add toner from the cartridge to the developer unit.

Check the toner supply, it may be running out of toner. Check the bottle or cartridge for correct install. Turn the machine on and let it warm up, Recheck the copy quality. If it is still light run a dozen blank copies, then a test copy if it is improving the toner is depleted and need to catch up, if it isn't there may be a problem with the toner add system.


Hope this is of some help.
Ed

First off I seen these problems so many many times as an sharp dealer, I think I may drop the support however, the reason why your are getting the misfeed is beacuse your paper feed tires are worn and need replacing, r u in Ct f so we can helpif not call your indepenant dealer , remember Staples will not support this machine, and tell him your paper feed tires are bad and needs replacing
the Noise could be anything let's fix one problem at a time ok.

CH - open cover in the paper feed area.OR - Sorter not installed properly
CH blinking - Dev unit is not properlyinstalled.

EE-EU - Low toner density in thedeveloper.

Check/ replace toner cart. Check/ reset Dev. unit. Check covers and doors to make sure all are closed properly. If you have sorter -- make sure sorter is seated properly.

Go to www.sharpusa.com. Type in the model number in the copier section to get a new owners manual.

Is there any errror codes?