Drawer error I have a Minolta CSPro 4000, and I am getting the following errors on the display screen: C0921 C0911 C0902 The drawers are digital, so I can not open them. It stated that the drawers are malfunctioning

Ck F9 here...

https://howtomendit.com/answers.php?id=404420

U4 Here....

https://producthelp.fisherpaykel.com/nz/Troubleshooting/Fault_Codes/DishDrawer%E2%84%A2_'U'_Fault_Code_-_Classic_Models

U4 is because of the F9.

Best to you.

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To the rear cover located one hole before waste toner box.Introduction one long screwdriver and push the unlock button.

C0d50 means you have a duplex error. This would be coming from the duplex drawer just under the main front door. You must open then close the duplex drawer to reset this code. It can not be reset by opening/closing the front door as with most other codes. Most of the time the c0d50 code will reset by opening/closing the duplex drawer. If not you will need service on the drawer as there is a drive or sensor problem in the drawer. The guides in this drawer have to jog in and out for different paper sizes and orientations. This code is usually causes by a failure of the guides to move properly.
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WheatlandServices

Fan motor, open close front door, to reset.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Open the paper drawer and switch the green button which is located towards the back of the paper drawer on your left. My copier does this everytime I add paper.

1st drawer lift motor is for code co924

Most C0900 range codes and specifically the 990 code refers to paper tray lifting. Pull out the paper drawers and check all the paper. Reload all the trays carefully. Then open/close the front door or turn off/on the machine to reset. If the code goes away great. If not then open all of the paper drawers, reset the code with the drawers OPEN. Then close each drawer 1 at a time waiting 30 seconds between each drawer closing. Once you close a drawer the code will come up within about 10 seconds. This will tell you which drawer is causing the issue. You can leave it out a bit so you can use the machine until you either find the issue with the tray or get a service guy out to fix it.
Good Luck

MINOLTA EP2010

C0400Exposure lamp does not turn on or AE sensor problem
1 Check the sanity of the lamp of the scan, contacts of the lamp
2 Contacts of the sensor to automatic exposure, he near by lens, do cleaning optometrists.

Ep2080 minolta cspro error code comes up with c0500