Canon PIXMA MX330 all-in-one printer- trying to print document. When I turn the printer on I get an error message on printer display: "Document in ADF. Redo operation after checking document in ADF and pressing OK". I check the ADF (it's fine) and press OK. No joy. printer just bips at me and displays error message: "Document in ADF. Close the feeder cover and press OK to eject document". There's no document in the ADF. Very frustrating. Is it worth repairing, as in cost prohibitive, or cheaper to buy a new one? Please advise. thank you

SOURCE: Canon MX330 - trying to use ADF. No doc inside on

Canon Pixma MX330, ADF error, Code : 2,103,0
Here's what I found. There were no stuck gears or pieces of plastic caught anywhere.
The ****** can still feed paper, except for (consistently) the last page -->error/stuck.
1) In order to CLEAR THE ERROR you need to do two things
a) & b):
a) Press OK, WITH THE HOOD OPEN, with a piece of paper loaded in the ADF, being careful to grab the paper manually as it comes out of the bottom of the hood.
b) Windex the strip of glass surface which sits under the ADF next to the platen. This needs to be done with attention to minute detail, and a bright LED flashlight; since ink smudges off of documents and collects on the glass with alarming frequency. The machine may think these smudges are caught/jammed paper.
2) In order to SCAN a stack of paper, add one blank sheet to the bottom of your document. This page will be the one that
fails to clear the ADF, generates an error, and must be manually cleared before the next job.
The rest of your pages will have already scanned.

Repeat Every Time You Use it