I would check the back cover as a lot of printers use a special rear cover for duplexing - the exception is 110lb+ printers with duplex support that require active duplexing like the MS8 and MS9 series, as well as the subsequent CS versions. Check for things like stripped gears or a loose panel, to start - if you do not see anything obvious, you may have a bad duplex assembly. Here is a link to the SM: https://www.laserexpressinc.com/manuals/Brother/brother-dcp-9030cdn-l3510cdw-l3517cdw-l3550cdw-l3551cdw-hl-l3290cdw-mfc-9150cdn-9350cdw-l3710cw-l3730cdn-l3735cdn-l3745cdw-l3750cdw-l3770cdw-service-manual.pdf
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I would check the back cover, as a lot of printers use a special rear cover for duplexing - the exception is 110 lb+ printers with duplex support that require active duplexing like the MS8 and MS9 series, as well as the subsequent CS versions. Check for things like stripped gears or a loose panel, to start - if you do not see anything obvious, you may have a bad duplex assembly or a damaged paper eject. Here is a link to the SM: https://www.laserexpressinc.com/manuals/Brother/brother-dcp-9030cdn-l3510cdw-l3517cdw-l3550cdw-l3551cdw-hl-l3290cdw-mfc-9150cdn-9350cdw-l3710cw-l3730cdn-l3735cdn-l3745cdw-l3750cdw-l3770cdw-service-manual.pdf
[document|42148]
It's deep in there on this one :-(. Not a quick job to replace. That said outside of the large commercial tier printers like the MS8 and a lot of the higher end CS units, this is normal - most consumer printers aren't built such that you can pull the duplexer out in 5-10 minutes and replace it.
I would check the back cover as a lot of printers use a special rear cover for duplexing - the exception is 110lb+ printers with duplex support that require active duplexing like the MS8 and MS9 series, as well as the subsequent CS versions. Check for things like stripped gears or a loose panel, to start - if you do not see anything obvious, you may have a bad duplex assembly. Here is a link to the SM: https://www.laserexpressinc.com/manuals/Brother/brother-dcp-9030cdn-l3510cdw-l3517cdw-l3550cdw-l3551cdw-hl-l3290cdw-mfc-9150cdn-9350cdw-l3710cw-l3730cdn-l3735cdn-l3745cdw-l3750cdw-l3770cdw-service-manual.pdf
[document|42148]
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It's deep in there on this one :-(. Not a quick job to replace.
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It's deep in there on this one :-(. Not a quick job to replace. That said outside of the large commercial tier printers like the MS8 and a lot of the higher end CS units, this is normal - most consumer printers aren't built such that you can pull the duplexer out in 5-10 minutes and replace it.
I would check the back cover as a lot of printers use a special rear cover for duplexing - the exception is 110lb+ printers with duplex support that require active duplexing like the MS8 and MS9 series, as well as the subsequent CS versions. Check for things like stripped gears or a loose panel, to start - if you do not see anything obvious, you may have a bad duplex assembly. Here is a link to the SM: https://www.laserexpressinc.com/manuals/Brother/brother-dcp-9030cdn-l3510cdw-l3517cdw-l3550cdw-l3551cdw-hl-l3290cdw-mfc-9150cdn-9350cdw-l3710cw-l3730cdn-l3735cdn-l3745cdw-l3750cdw-l3770cdw-service-manual.pdf
[document|42148]
It's deep in there on this one :-(. Not a quick job to replace.