I have a customer that has a Brother 420 printer and needs the white ribbon cable that moves the printhead replaced. Can you tell me where I can find this part for purchase? Thanks a million. Have a good day.
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I had this same problem and none of the printer services (clean printhead, align printer, calibrate linefeed) fixed the problem. After trying every solution that I found on the internet with no success I was able to fix the problem by cleaning two critical parts of the printer. 1. Turn off the printer and open it as though you are going to change the printheads. 2. Towards the back of the printer you will see a thin clear plastic ribbon that has very small black lines on it. Very, very, very gently clean this ribbon. I used a lint free cloth and some glass cleaner. Spray the cleaner on the cloth and slide the cloth against both sides of the ribbon. Do not pull on the ribbon. This ribbon is used to tell the printhead how far it has moved from side to side. 3. Next locate the silver bar that runs across the back of the printer. This bar is used to feed the paper through the printer as it is printing a document. On the left side of the bar you will see some plastic guides that hold the bar in place. On the outside of the plastic guides you should see a clear plastic disc made of the same material as the ribbon above.This disc also has very small black lines on it. Again very, very, very gently clean this plastic disc.This disk is used to tell the printheads how far it has travelled down the page.This is the one that was causing the problem.The dust or dried ink or whatever was on the disc was causing the printer to incorrectly calibrate the linefeed and was causing the white lines to appear on my documents. 4.Use the "calibrate linefeed" function of the printer services to recalibrate the linefeed and the white lines will hopefully be gone.
This is a "spacing alarm". check that the printhead moves freely from left to right. If not, remove the ribbon and try it again. If it is moving freely then it should be ok, if not it will need most likely the space motor or the main board replaced. In some cases it is also possibly the white carriage cable that runs from your main board to the space motor. Hope this helps.
First you need to turn On the printer and open the printer access door
where you can see the Ink. Now wait for the Printhead to stop into the
middle then remove the ink cartridges both ink and black., Now to rmove
the Old printhead you need to press a Tab which is hidden on the
printhead., heres the step to remove the printhead which for me the
-Point your index finger on the white sticker that
attached on the printhead or the bullseye sticker(If theres no white
sticker on the print head just put your index finger on the middle of
-Now your index finger is on the middle of the
white sticker right? Move your index finger upward unti you feel a
latch that you can press., Just press and full then your printhead wil
-Now Your ready to insert your new printhead -To
insert new printhead just put the printhead on the carriage of the
printer and gently press the white sticker of your new printhead make
sure that you will hear a clicking sounds then put your cartridges back
some instances that the printhead will not stay on the middle., it
keeps on staying on the right or on the leftside for you to solve that
heres the step
-Turn on the printer open printer access door and
wait for the printhead move into the center and if the printhead its on
the center immediately unplug the power cable so the printhead will not
the problem is your printhead is bad . do a print test by presing both arrow buttons at tah esame time for two seconds, look fo rthe line that reads bad dots. if the value i sgreater than 000 yu have a bad printhead
Downloaded service & repair manual for brother mfc 5840CW- my unit. Will follow repair directions to check the memory then replace required parts. Will be cheaper and faster than finding a repair shop and paying as much as the macine to fix it! Rip off prices for repairs today on units so they can get you to leave them and buy a new one. Then they fix the unit and sell it "refurbished"- not mine!
Your information on clearing memory, the ink cleaning codes and taping the cartridge from over cleaning was good. Thanks for the help!
Your printhead is in correctly but not aligned, Please loosen the 2 screws that holds the printhead.Remove ribbon(all this while the printer is powered off) Now look on the right side there is a lever that makes the printer go closer to the ribbon ,move the lever to number 9 and move the head over to the left side of the printer.push the head forward slightly towards the black roller and tighten the 2 screws again ,install the ribbon and move the blue lever to 1 and try printing again.
Hope this helps.Dezzi
Yes, another suggestion is to give it back to the dealer or a service partner which can be found on the homepage of brother.
If the printer is 3 months old you are in guarantee time.
Its a common problem with the printheads that one color (M or Y) is lost somehow sometime...! (Valveproblem within the printhead)
You cant fix it yourself (May need a new printhead).
Clean the large silver rod that runs through the carriage. It is dirty and not allowing the carriage to move as freely as it should. Ideally it should be left dry.
Also change the ribbon. The same motor drives the carriage and the ribbon. If it has a bind, the same thing can happen.
Hope it helps
You have replaced the item which is commonly the cause- the printhead. The other possible problems are: a connection break in the printhead ribbon cable, which makes electrical connection from the driver circuitry to the printhead. Look for a tiny crack, especially along the edge of this ribbon cable. Another possibility is an electronic component defect in the circuitry which fires the printhead, or maybe a loose solder connection in the same circuit.
Lastly, when you replaced the printhead, are you reasonably certain the replacement head didn't have a broken top pin or two?