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Tina NelsonSep 5, 2025
Why is the print condensed on my Brother MFC-7840W?
- KkellymarySep 5, 2025
Condensed print is usually caused by a poor telephone connection. Ask the other party to send the fax again.
Why is the print condensed on my Brother MFC-7840W?
Condensed print is usually caused by a poor telephone connection. Ask the other party to send the fax again.
What to do if my Brother MFC-7840W has no printout?
If your Brother All in One Printer isn't printing, there are several things you can check: * Ensure the printer is plugged in and the power switch is turned on. * Verify that the toner cartridge and drum unit are installed correctly. * Check the interface cable connection. * Make sure the correct printer driver has been installed and chosen. * Check to see if the LCD is showing an error message. * Check the machine is online.
Why Brother MFC-7840W All in One Printer does not load paper and shows 'No Paper' or 'Paper Jam'?
If your Brother All in One Printer displays 'No Paper' or a 'Paper Jam' message, here's what you can do: * If there is no paper, load a new stack of paper into the paper tray. * If there is paper in the paper tray, make sure it is straight. * If the paper is curled, you should straighten it; sometimes it is helpful to remove the paper, turn the stack over, and put it back into the paper tray. * Reduce the amount of paper in the paper tray, and then try again.
How to remove vertical black line in copies from Brother MFC-7840W?
Black vertical lines on copies are typically caused by dirt or correction fluid on the glass strip. Clean the scanner glass. The corona wire for printing may also be dirty, so clean the corona wire as well.
Why does my Brother MFC-7840W ‘Hear’ a voice as a CNG Tone?
If Fax Detect is set to on, your machine is more sensitive to sounds. Deactivate the machine by pressing Stop/Exit. Try avoiding this problem by turning Fax Detect to off.
Why don't headers or footers print on my Brother All in One Printer, even though they appear on the screen?
Adjust the top and bottom margins in your document to allow for this.
What to do if my Brother MFC-7840W All in One Printer is printing pages that are smeared?
The Paper Type setting may be incorrect for the type of print media you are using, or the print media may be too thick or have a rough surface.
What causes copy quality difficulties such as vertical black lines on Brother All in One Printer?
Black vertical lines on copies are typically caused by dirt or correction fluid on the glass strip, or the corona wire for printing is dirty.
What does 'Drum End Soon' mean on Brother All in One Printer?
If your Brother All in One Printer displays 'Drum End Soon', replace the drum unit with a new one. This is because the drum counter has reached its upper limit.
How to clear paper jam in the rear of Brother MFC-7840W All in One Printer?
To resolve a 'Paper jam in the rear of the machine' error on your Brother All in One Printer, open the back cover and remove the jammed paper.
General| Print technology | Laser |
|---|---|
| Maximum resolution | 600 x 2400 DPI |
| Time to first page (black, normal) | 10 s |
| Print speed (black, normal quality, A4/US Letter) | 22 ppm |
| Grayscale levels | 256 |
| Input color depth | 24 bit |
| USB port | Yes |
| Standard interfaces | USB 2.0 |
| USB 2.0 ports quantity | 1 |
| Dimensions (WxDxH) | 428 x 396 x 304 mm |
| Networking features | 10/100 Base-TX Ethernet |
| Wireless technology | IEEE802.11b/g |
| All-in-one functions | Copy, Fax, Scan |
| Color all-in-one functions | scan, n |
| Compatible operating systems | Windows Vista/XP-Home/2003/2000 Mac OS X 10.2.4 & later Linux printer driver |
| Copier resize | 25 - 400 % |
| Maximum copy resolution | 600 x 600 DPI |
| Maximum number of copies | 99 copies |
| N-in-1 copy function (N=) | 2, 4, 9, 16, 25 |
| Copy speed (black, normal quality, A4) | 22 cpm |
| Faxing | Mono faxing |
| Fax memory | 500 pages |
| Fax coding methods | MH, MMR (Fax coding method), MR |
| Fax speed dialing (max numbers) | 200 |
| Maximum input capacity | 250 sheets |
| Multi-Purpose tray input capacity | 1 sheets |
| Auto document feeder (ADF) input capacity | 35 sheets |
| Internal memory | 32 MB |
| Sound power level (standby) | 32 dB |
| Sound pressure level (printing) | 53 dB |
| Media weight (tray 1) | 60 - 105 g/m² |
| ISO A-series sizes (A0...A9) | A4, A5, A6 |
| ISO B-series sizes (B0...B9) | B5, B6 |
| Maximum ISO A-series paper size | A4 |
| Multi-Purpose Tray media weight | 60 - 163 g/m² |
| Supported network protocols (IPv4) | IPv4, IPv6 |
| Sustainability certificates | ENERGY STAR |
| Power consumption (standby) | 75 W |
| Power consumption (PowerSave) | 12 W |
| Power consumption (average operating) | 320 W |
| Package weight | 13.400 g |
| Market positioning | Home & office |
