Question about Brother MFC-640CW All-In-One InkJet Printer

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Images coming out crooked when in copy mode. A hardware problem?

The MFC-640CW I use is suddenly making copies that appear crooked, despite the fact that the original (either on the glass or through the feed) is not crooked. Any suggestions? Carol G bookluvn@yahoo.com

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Ensure the guide for the plain paper onto which the image is printed, are pushed up fully. It is possible that the paper is being fed into the paper feed path at an angle if the guides are nut pushed up.

Posted on Jun 23, 2007

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Posted on Jan 02, 2017

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Problem with brother mfc 7340 copier: when i copy, two parallel lines appear on copy. thanks for your answer


1. To test, print the Help List:a. Press the REPORTS key located on the control panel.b. Press the up or down arrow key until Help list appears on the display(#2).c. Press Ok. The report should begin printing.Black lines that appear on faxes you send, images you scan into the computer and copies you make are typically caused by dirt or white out on the scanner unit. The scanner unit is the mechanism that reads in the documents that are being copied or transmitted.

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Go to Additional Functions> Common Settings> Toner Saver Mode and make sure its off.

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Very crisp vertical grey line appears (glass clean)


I have the exact same problem. It was there since I first bought the MFC-7840W.
Vertical line appears in scans using the automatic document feeder (ADF).
Vertical line does not appear when scanning single page (placing it directly on the glass -- i.e. not using the ADF).

Cleaning the glass strip for the ADF (or the white pressure bar overhead) does not solve the problem.
The problem does not occur with copies using the ADF (using the COPY button which is basically a scan and print). This would suggest that dust and dirt is not to blame because that would also appear on the copies.
But since I believe a copy is basically a scan plus print, they should be using the same electronics -- a hardware problem on the scan would likely appear on a copy also -- there is some difference between how they accomplish this.
It's definitely not a software issue since it occurs on all versions of Windows and Mac OS X (and multiple computers). It also does not matter whether I "push" the scan to the computer by using the scan button on the MFC... or "pull" the scan from the MFC using the Brother Control Center software.

Aug 12, 2009 | Office Equipment & Supplies

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I Have a Brother MFC-640CW all-in-one Inkjet Printer. I changed the ink cartridges and I can get them all working except the yellow, when I do a Test print all the other colors come out perfect except for...


press menu then start bk copy then fourtimes arrow-up quickly after another. machine will be in maintenance mode (all lights will flash).
press 7-6-4 and OK (or start-bk-copy).

Machine will do some refreshing of ink and some special cleaning.

When finished press 7-6-3 start-bk copy
machine will do a power purge.

leave maintenance mode by pressing 9-9.

do run a test print.

DO USE ORIGINAL BROTHER INK or skyhorse generic ink only due to the fact that other generic ink will defenetly do damage to the printer!

Apr 23, 2008 | Office Equipment & Supplies

1 Answer

Brother MFC 640 CW


mike,

just press menu then start bk-copy then fourtimes arrow-up quite quickly one after another to get to the maintenance menu.

Mar 26, 2008 | Brother MFC-640CW All-In-One InkJet...

1 Answer

Screen says unable to init and cannot find guide.


press menu then start bk copy then 4 times arrow up. Lights will flash and machine turns to maintenance mode. In case you cant see an 2 digit error code press start bk copy again.

If the error code starts with 4 the printhead is defective and needs replacement.

If you have another code displayed search code here at fixya. Most of them are explained a thousand of times...

To leave the maintenance mode press 9 then 9.

Feb 15, 2008 | Brother MFC-640CW All-In-One InkJet...

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