Hi Terry, thank you so much for the video!! I had an actual paper jam in my MFC-9340CDW (a sheet of paper was was rolled on the fuser roller). Thanks to your video I learned how to remove the fuser unit and remove the paper (time consuming as the sheet got glued itself because of the toner and heat).
My printer had a "paper jam" for years! I am so glad I found this video. Thank you for uploading it! I'm assuming that the only way to prevent this issue in the future is to keep the printer unplugged when I'm not using it. 🙂
Brilliant video. It solved my intermittent 'paper jams" when no paper was actually jammed. I tested the original IR sensor from my printer and found 20mA through the diode side gave me only 0.14mA through the opto-transistor side. I measured a similar sized spare I had bought for another project and for 5 and 20mA on the diode side gave 6 and 12 mA on the transistor side respectively. So about 100 time better! I popped that into the board and it has worked perfectly for 50 pages so far. Before I could only get one page out, sometimes when it felt like it, before announcing a 'jam'. You have saved me throwing away some spare toners, so I will make a donation via paypal. Cheers, Greg
Cheers greg, I have contemplated adding a pull up resistor on the opto transistor side to compensate for the loss of sensitivity as the printer ages but I have always wondered why it loses sensitivity, I did a service call yesterday, for a completely different brother machine but the same type of jam fault and that persons home was infested with mould. I mean you walked into the unit and you could smell the mould in the air and that damp feeling. I took one look at the top of the printer and the dust settled on top of it was not dust but mould. I clean all the opto sensors with a damp chux with weak chlorine and bingo the printer worked normally again. Starting to wonder after all these years if failing opto sensors are due to mould growth not just a weak IR LED diode.
@@TerryJonesPrinterRepairs I'm not sure I understand the logic of it being a weak diode. If I understand correctly, the IR signal passes across the sensor gap when the door is open, so an active signal indicates that the door is open. When the door is closed, the little plastic flag is supposed to block the gap in the sensor, so the absence of a signal is the normal operating condition, right? If so, then shouldn't a weakening diode fail to the door-closed condition, instead of the door open condition? UPDATE: On further consideration, I believe that the photo-transistor in the component is failing shorted. If you look at the traces on the back of the board, the big thick one connecting many of the pins is probably a ground trace. The output of the diode and the emitter (E) are both connected to this trace, and pin 5 of the long connector connects to the collector (C). So pin 5 is probably the sense line for the rear door. When the component is powered, the diode is always emitting, so when the gap is clear, the base of the transistor will be powered, and current will flow from the collector to the emitter, which will pull the collector down to ground. When the gap is blocked, the base will have no power, so the collector will remain at input voltage as an open circuit. Therefore, pin 5 high means door closed, and pin 5 low means door open. To test this, I removed the component from the board, and reinstalled the board. An what do you know, the printer is printing again! I just have to be mindful that it won't necessarily detect paper jams in the fuser, so it might keep grinding away if that happens. But I've had this printer for 7 years or so, and never had a jam, so who knows?
Hi Terry, Thanks for your feedback. I decided to go a bit further and do some experiments. I used the IR LED and IR Receiver from a 36 piece "Arduino sensor kit" for these tests. I released the clips on the Brother IR unit and slid out the clear IR diode and black IR receiver. I washed bother in Isopropyl alcohol and dried them with paper towel before starting. I connected two separate 5V, 20 mA current-limited supplies, one for the diode, one for the receiver. Using the Brother receiver, I got 11 mA output with the Arduino kit Diode at 10mA input. Using the Arduino receiver I got 0.42mA output, with the brother diode at 10mA. That's the same result as using Brother receiver. Therefor I think we can safely say the Brother IR diode goes low output. Even boosting the Brother LED current to 40mA there was almost no increase in the current through the receiver Cheers, Greg
@@TerryJonesPrinterRepairs Hi Terry, I don't think it's planned obsolesce by Brother. It's just works out that way. It would just be one of a thousand parts all supplied by third parties on the lowest tender. And its an easy fix, as long as we can get parts, such as the replacement board that you offer.
Hello sir brother printer 8065dn experiences paper jam at first print or first Photocopy. I can't send multiple pages for print to the printer because if it manages to print the first page, the second page will jam. When this jam happens, i will have to use my hand to pull out the paper from the roller which is right at the output tray and also i will need to remove the drum unit to remove the second paper jam. I have checked the fuser unit; the upper and lower roller of the fuser unit and it looks good. I have cleaned the rollers yet none of this has stopped the Jam issue. Can we now say the sensor at the back of the printer which is situated at the same spot as seen in this video needs a change or cleaning of the sensor?
Great video! Very clear and concise. Do you happen to have a part number or a datasheet for that particular IR sensor component? (I'm handy with a soldering iron, and I like to minimize e-waste).
@@TerryJonesPrinterRepairs yeah, I saw that. I just want to try and find the black sensor part on mouser or digikey, and repair the original board, instead of replacing the whole board. (Hobby motivation). A datasheet for the photosensor would be ideal.
great timing, hit one this week, searches all pointing to fuser rollers, hard to find link to your website / replacement board please add better way to find and will pickup two. cheers
My sensor circuit board is fine. The plastic flag on the end of the Sensor Arm is broken on mine , thus the sensor is never tripped. so I get a rear jam error that I can't clear on My " HL L3290cdw" Do you know where I can get this part .
Hi My MFC9330CDW is giving me error when I print two sided print. I prints first page fine and when pulling back same page for back side printing, paper goes back in and comes out with error on printer about paper jam. It shows takeout the paper tray and remove jam paper. In my printer paper always jam under the paper tray, i think in duplexer. And paper stay almost flat its look like it feed the paper but not all the way for other side printing.
My brother MFC 9340 CDW fades, the top half of the first page is perfect, but it’s fades away by the end. Also, “registration “ fails. I noticed a dent/ surface imperfection in the belt unit. Using genuine brother toner, however it’s a few years old. Please advise. Thanks!
Yes this is a problem that is becoming a bit of a plague for this printer engine, soon as my channel get remonetized I will upload a video how to fix. You may be using genuine toners but are you using genuine drums?
@@TerryJonesPrinterRepairs thanks for the fast reply! Yes all parts are genuine, I brought this printer used for 20 USD and the parts are genuine, the printer is clean and looks barely used. According to the page counter only 4000 sheets have been printed. It was worth a gamble.
My machine now has over 100000 copies, just replaced the 4 drums, a message under maintenance says to replace the fuser and paper folder kit. The message only lasts a minute. How long does a fuser normally last? Machine has never had a paper jam. Only complaint is doing a copy with blue ink writing, comes out not as dark in black only copy mode. Color mode works well.
@@TerryJonesPrinterRepairsYeah good question. I was also having faded print. I was thinking it was the toner cartridge. I changed the toner cartridge same issue continued. I had to buy a brand new drum and Viola my sharp and clean print resumed.
Hi My MFC9335CDW is giving me error when I print two sided print. I prints first page fine and when pulling back same page for back side printing, paper goes back in and comes out with error on printer about paper jam. Please open paper tray and check rear of printer for paper jam.
@@TerryJonesPrinterRepairscan you please elaborate? My new-to-me L8650 gives me this rear jam error without jam in the rear as the paper already passed rear and its just stopped below paper tray?
@TerryJonesPrinterRepairs here ruclips.net/video/GbPWxpKEQwA/видео.htmlsi=Wkj8XjhUpoqtjHd9 is video of "rear paper jam". In addition to this it stops printing black. When calibration does not fail, page top start with ok black but fade very soon - fading is noticeable from very top of the first page, on second page is still barely visible, on third its completely invisible. Black toner cartridge works perfectly when placed in other colour drum slot. Contacts of cartridges and drum seems to be clean.
I had the Same problem on My HL l3290cdw . My printer is heavy and was not resting on a flat surface, the printer ended over hanging the plastic table and the edge of the table somehow pushed on the bottom of the printer and distorted the underside of the paper tray . And this is the path of the paper when you print 2 sided. My fix was to place the printer on a flat solid table or a flat straight floor.
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Hi Terry, thank you so much for the video!! I had an actual paper jam in my MFC-9340CDW (a sheet of paper was was rolled on the fuser roller). Thanks to your video I learned how to remove the fuser unit and remove the paper (time consuming as the sheet got glued itself because of the toner and heat).
My printer had a "paper jam" for years! I am so glad I found this video. Thank you for uploading it! I'm assuming that the only way to prevent this issue in the future is to keep the printer unplugged when I'm not using it. 🙂
Brilliant video. It solved my intermittent 'paper jams" when no paper was actually jammed.
I tested the original IR sensor from my printer and found 20mA through the diode side gave me only 0.14mA through the opto-transistor side.
I measured a similar sized spare I had bought for another project and for 5 and 20mA on the diode side gave 6 and 12 mA on the transistor side respectively. So about 100 time better!
I popped that into the board and it has worked perfectly for 50 pages so far. Before I could only get one page out, sometimes when it felt like it, before announcing a 'jam'.
You have saved me throwing away some spare toners, so I will make a donation via paypal.
Cheers,
Greg
Cheers greg, I have contemplated adding a pull up resistor on the opto transistor side to compensate for the loss of sensitivity as the printer ages but I have always wondered why it loses sensitivity, I did a service call yesterday, for a completely different brother machine but the same type of jam fault and that persons home was infested with mould. I mean you walked into the unit and you could smell the mould in the air and that damp feeling. I took one look at the top of the printer and the dust settled on top of it was not dust but mould. I clean all the opto sensors with a damp chux with weak chlorine and bingo the printer worked normally again. Starting to wonder after all these years if failing opto sensors are due to mould growth not just a weak IR LED diode.
@@TerryJonesPrinterRepairs I'm not sure I understand the logic of it being a weak diode. If I understand correctly, the IR signal passes across the sensor gap when the door is open, so an active signal indicates that the door is open. When the door is closed, the little plastic flag is supposed to block the gap in the sensor, so the absence of a signal is the normal operating condition, right? If so, then shouldn't a weakening diode fail to the door-closed condition, instead of the door open condition?
UPDATE: On further consideration, I believe that the photo-transistor in the component is failing shorted. If you look at the traces on the back of the board, the big thick one connecting many of the pins is probably a ground trace. The output of the diode and the emitter (E) are both connected to this trace, and pin 5 of the long connector connects to the collector (C). So pin 5 is probably the sense line for the rear door. When the component is powered, the diode is always emitting, so when the gap is clear, the base of the transistor will be powered, and current will flow from the collector to the emitter, which will pull the collector down to ground. When the gap is blocked, the base will have no power, so the collector will remain at input voltage as an open circuit. Therefore, pin 5 high means door closed, and pin 5 low means door open.
To test this, I removed the component from the board, and reinstalled the board. An what do you know, the printer is printing again! I just have to be mindful that it won't necessarily detect paper jams in the fuser, so it might keep grinding away if that happens. But I've had this printer for 7 years or so, and never had a jam, so who knows?
Vielen Dank, tolle detailierte Beschreibung. Mei Drucker arbeitet wieser ordentlich!
Hi Terry,
Thanks for your feedback. I decided to go a bit further and do some experiments.
I used the IR LED and IR Receiver from a 36 piece "Arduino sensor kit" for these tests.
I released the clips on the Brother IR unit and slid out the clear IR diode and black IR receiver.
I washed bother in Isopropyl alcohol and dried them with paper towel before starting.
I connected two separate 5V, 20 mA current-limited supplies, one for the diode, one for the receiver.
Using the Brother receiver, I got 11 mA output with the Arduino kit Diode at 10mA input.
Using the Arduino receiver I got 0.42mA output, with the brother diode at 10mA. That's the same result as using Brother receiver.
Therefor I think we can safely say the Brother IR diode goes low output.
Even boosting the Brother LED current to 40mA there was almost no increase in the current through the receiver
Cheers,
Greg
So a conclusion would be that this is a very clever built-in obsolescence
@@TerryJonesPrinterRepairs Hi Terry,
I don't think it's planned obsolesce by Brother. It's just works out that way.
It would just be one of a thousand parts all supplied by third parties on the lowest tender.
And its an easy fix, as long as we can get parts, such as the replacement board that you offer.
Hello sir brother printer 8065dn experiences paper jam at first print or first Photocopy. I can't send multiple pages for print to the printer because if it manages to print the first page, the second page will jam. When this jam happens, i will have to use my hand to pull out the paper from the roller which is right at the output tray and also i will need to remove the drum unit to remove the second paper jam. I have checked the fuser unit; the upper and lower roller of the fuser unit and it looks good. I have cleaned the rollers yet none of this has stopped the Jam issue.
Can we now say the sensor at the back of the printer which is situated at the same spot as seen in this video needs a change or cleaning of the sensor?
Thanks a lot. For now, I just got a piece of electrical tape on the end of the sensor cut off to make it bigger. Seems to work.
Great video! Very clear and concise. Do you happen to have a part number or a datasheet for that particular IR sensor component? (I'm handy with a soldering iron, and I like to minimize e-waste).
You can Buy the Parts here www.fixitfastelectronics.com/brother-printer-sensor-board/mfc-9330-9340-sensor-board.htm
@@TerryJonesPrinterRepairs yeah, I saw that. I just want to try and find the black sensor part on mouser or digikey, and repair the original board, instead of replacing the whole board. (Hobby motivation). A datasheet for the photosensor would be ideal.
great timing, hit one this week, searches all pointing to fuser rollers, hard to find link to your website / replacement board please add better way to find and will pickup two. cheers
www.fixitfastelectronics.com/brother-printer-sensor-board/mfc-9330-9340-sensor-board.htm
My sensor circuit board is fine. The plastic flag on the end of the Sensor Arm is broken on mine , thus the sensor is never tripped. so I get a rear jam error that I can't clear on My " HL L3290cdw" Do you know where I can get this part .
Hi My MFC9330CDW is giving me error when I print two sided print. I prints first page fine and when pulling back same page for back side printing, paper goes back in and comes out with error on printer about paper jam. It shows takeout the paper tray and remove jam paper. In my printer paper always jam under the paper tray, i think in duplexer. And paper stay almost flat its look like it feed the paper but not all the way for other side printing.
My brother MFC 9340 CDW fades, the top half of the first page is perfect, but it’s fades away by the end. Also, “registration “ fails. I noticed a dent/ surface imperfection in the belt unit.
Using genuine brother toner, however it’s a few years old. Please advise. Thanks!
Yes this is a problem that is becoming a bit of a plague for this printer engine, soon as my channel get remonetized I will upload a video how to fix. You may be using genuine toners but are you using genuine drums?
@@TerryJonesPrinterRepairs thanks for the fast reply! Yes all parts are genuine, I brought this printer used for 20 USD and the parts are genuine, the printer is clean and looks barely used. According to the page counter only 4000 sheets have been printed. It was worth a gamble.
@@ElixirCNC This problem is usually due to the toners being empty.
My machine now has over 100000 copies, just replaced the 4 drums, a message under maintenance says to replace the fuser and paper folder kit. The message only lasts a minute. How long does a fuser normally last? Machine has never had a paper jam. Only complaint is doing a copy with blue ink writing, comes out not as dark in black only copy mode. Color mode works well.
@@TerryJonesPrinterRepairsYeah good question. I was also having faded print. I was thinking it was the toner cartridge. I changed the toner cartridge same issue continued. I had to buy a brand new drum and Viola my sharp and clean print resumed.
How about a front paper jam? My paper gets about an inch past the yellow ink and jams
Your answer is in a later video
Mine is magenta cartridge error and no toner
You are watching the wrong video @@nnaemekaogbonna2420
Where can one get the spare parts
www.fixitfastelectronics.com/brother-printer-sensor-board/mfc-9330-9340-sensor-board.htm
thanks
Hi My MFC9335CDW is giving me error when I print two sided print. I prints first page fine and when pulling back same page for back side printing, paper goes back in and comes out with error on printer about paper jam. Please open paper tray and check rear of printer for paper jam.
spring on black plastic guide on rear door is not in correct position.
@@TerryJonesPrinterRepairscan you please elaborate? My new-to-me L8650 gives me this rear jam error without jam in the rear as the paper already passed rear and its just stopped below paper tray?
@@n10plus40 L8650 is a completely different machine with different causes. Upload a video of what it is doing.
@TerryJonesPrinterRepairs here ruclips.net/video/GbPWxpKEQwA/видео.htmlsi=Wkj8XjhUpoqtjHd9 is video of "rear paper jam". In addition to this it stops printing black. When calibration does not fail, page top start with ok black but fade very soon - fading is noticeable from very top of the first page, on second page is still barely visible, on third its completely invisible. Black toner cartridge works perfectly when placed in other colour drum slot. Contacts of cartridges and drum seems to be clean.
I had the Same problem on My HL l3290cdw . My printer is heavy and was not resting on a flat surface, the printer ended over hanging the plastic table and the edge of the table somehow pushed on the bottom of the printer and distorted the underside of the paper tray . And this is the path of the paper when you print 2 sided. My fix was to place the printer on a flat solid table or a flat straight floor.