Minolta 2530DL. This piece of junk has another

If it physically doesn't go through, try to push a heavy stock card or decent thick laminated paper and try to feed it through. There maybe a mylar (plastic sheet) flipped backwards or a piece of debree stuck in paper path of your Document Feeder. This may resolve 80% of issue.
The rest could be broken sensor flag (actuator) or dirty sensor that is not reading the paper passage (or it the sensor is faulty all together)
The amount of staples, paper clips, Bluetag and other junk I pulled from ADF over the years..Bucket loads :)
Good luck.

Buy a new fusing unit can't get small parts for the fusing un it for these models

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

I literally just fixed the same problem in my 2530DL.

Look at section 6.3.23 in this service manual for a nearly identical model http://printer.konicaminolta.com/drivers/other/Manuals/24_25/fs_2400s.pdf and notice the "Precaution for Reinstallation"

This Registration Roller Solenoid is an electromagnet-activated lever which controls the timing of the page's movement through the printer.
The manual notes that the space between the "flapper" and gear is critical for proper timing. In my case, the tiny foam pad at the bottom end of the flapper had apparently become compressed over time, resulting in the spacing going out of tolerance.

I removed the foam pad and replaced it with layers of electrical tape, adding layers until I found the thickness needed to make the printer work correctly (6 to 8 layers). Then I removed the tape and glued in a piece of hard rubber of the same thickness. (Tape is only a temporary measure as it can compress or become sticky after a while.) Everything is back to normal now!

Good luck!

This error message is displayed by the printer when paper is jammed in one or more locations. In such a case, users are recommended to remove the jammed paper from the specified location. The entire paper path must be checked for any pieces of paper. To stop the message, open and close the top most cover of the printer. Lastly, verify the flags and the sensors. If the problem persists, the cause of the error message could be a broken sensor or sensor lever.

Sensor may be bad, for that jam. cleaned the rollers?
also also mite need to replace the rollers for the draw try this ite you have alegacy Minolta machine Now Konica Minolta

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

the door or cover is not properly closed or it may still have piece of paper inside it.

remove the little pieces of paper

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

Open the Front Cover and remove the OPC drum cartridge by pulling up from the green lever. I'm sure you'll find all these instructions on the box the new drum is comming.

change ink cartdidge then try. check also paper jam.
if still problem then change ink cartridge then check.

you can find all trouble shooting ideas on following website:
ftp://ftp.minolta-qms.com/pub/cts/out_going/manuals/2530dl/user_e.pdf

Good luck