RJ-4040
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FAQs & Troubleshooting |

RJ-4040
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Updated:07/16/2025
These are the most viewed FAQs, ranked by popularity.
- 1.The print quality is poor, and the image is too light or dark.
- 2.How do I transfer label or slip templates?
- 3.Where can I find my Brother printer's serial number?
- 4.How do I disable broadcasting the printer to AirPrint-compatible devices?
- 5.A communication error occurs when printing via serial cable (RS-232C).
Latest
These are the latest FAQs, sorted by last update date.
06/25/2025
What Android™ mobile application can I use?
06/25/2025
What iOS mobile application can I use?
04/03/2025
Can I directly operate my printer from a self-developed application software and print a label?
11/28/2024
I cannot install the printer driver or print in Windows 11.
11/19/2024
How do I connect my printer to the computer via Wi-Fi® using an access point? (Windows 11 24H2)