I can’t find a service manual for the printer but looking at the [https://www.fortwayneprinterrepair.com/wordpress/2017/06/20/mfc-7840w-parts-list/|parts list] for the printer, I think that it ''may'' be the roller shaft shown as part #1-4 in the ''Brother MFC 7840W Document Scanner Parts List'' section of the part list. (scroll about halfway down the page to find it)
Below the diagram showing the parts for just this section you’ll find the Brother part number and description i.e. 1-4 LP2601001 1 SEPARATE ROLLER SHAFT ASSY
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If you can load documents into the ADF (auto document feeder) then this is most probably why.
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If you can’t load documents into the ADF (auto document feeder) then this is most probably why.
Hi @katskorner,
I can’t find a service manual for the printer but looking at the [https://www.fortwayneprinterrepair.com/wordpress/2017/06/20/mfc-7840w-parts-list/|parts list] for the printer, I think that it ''may'' be the roller shaft shown as part #1-4 in the ''Brother MFC 7840W Document Scanner Parts List'' section of the part list. (scroll about halfway down the page to find it)
Below the diagram showing the parts for just this section you’ll find the Brother part number and description i.e. 1-4 LP2601001 1 SEPARATE ROLLER SHAFT ASSY
If you can load documents into the ADF (auto document feeder) then this is most probably why.