Paper will not feed via ADF in Canon laser class 510 fax. keeps saying reset document when we try to fax or copy using either ADF or scanner. Briefly received error E337 (or could have been E377).

The ADF is the "automatic Document Feeder" it thinks something is in there when there isn't. check to see if something is stuck in it that would cause it to "think" that.

1 Load the document in the ADF.
2 Press [COPY].
3 Use the numeric buttons to enter the number of copies. (up to 99)
4 Adjust any necessary settings for your document.
5 Press [Start].
NOTE
To cancel copying, press [Stop/Reset].

Are the copies solid black or black lines ? If there are black lines, try cleaning the **** glass under the ADF ( above the large glass ).

You orginal feed rollers may be worn out. when this happens, the paper slips and the machine thinks the paper is too long.
You need to have the ADF rollers replaced.

You say it makes copies without the stripes. Do you use the automatic document feeder (ADF) when you make copies, or open the top and lay the paper on the platen? If you get stripes when using the ADF, the ADF scanner area needs to be cleaned. It's the smaller glass area to the left of the main platen glass. Use a damp cloth and remove any dirt or debris.

http://www.usa.canon.com/opd/controller?act=OPDDownloadIndexAct

you want to download the PCL driver

Open the document feeder and look for an obstruction.

Clean the roller and pad with isopropyl alcohol.

Also look for a switch actuator trapped down or knocked off.

I have Canon 7000 Laser with Error message #330 which said
SET DOCUMENT??? HELP?

You may have a really tiny paper jam. You need to open up unit to get access to feeder properly. Use a torch, jams can be so small you can miss them. cheers lilacgerry

If the paper isn't feeding in the ADF (automatic document feeder - upper paper feeder) then the ADF roller assembly will need to be replaced. Try a copy on the flat glass area. If it work, then it's the ADF, If not then the upper scanner assembly with have to be replaced.