Not sure if it helps but I just solved the Support Code 6004 in the TS5120. I did a post on it here: https://community.usa.canon.com/t5/Printer-Multifunction-Support/canon-ts9120-support-code-6004/m-p/352824/highlight/true#M45259
I just fixed my uncle's Canon TS5120 printer which had the support code 6004 error. It was hard to see at first but there was some paper caught up in the roller. The troubleshooting I was seeing was just mentioning checking the scanner tray, nothing ...
