Thanx Chaps! (Again!) Had to go out to a customer with a Brother MFC-9750, error 76. Thought I would read up here before going out. Found out it was a fuser error. Checked their fuser out, everything tested out okay but still got error 76 & 78 after doing reset. Guessed Thermistor. Returned with new thermistor (same as the 1200 series by the way) Part No. BROUL8902001. Fitted then reset using, "Power on while holding menu/set. key in 91, then key in 99 to exit" I think I had to power off but it was fine after that. Good as new! Hope my 2 pence helps as well . . . Dazz UK
Hi dazz, Can you help me? We have a brother 9870 reading error code 76. I've read your diagnosis on line and have taken a look at our printer but can't locate the thermistor. I'm a TV/audio engineer, definitely not a printer expert but have been asked to 'take a look' by my manager. Could you tell me where the device is located and also, really showing my ignorance now, what is a fuser?
Hi Dave, The fuser is the heater section which fuses the toner onto the paper using heat & pressure. It is not easy to get to on these units but as you are technically minded you should manage. Try doing the reset first, if this doesn't cure the problem, get the screwdriver out! You basically need to take all the covers off. The fuser is situated at the rear of the machine. To take the scanner section off, disconnect all of the cables/connectors at the back, then there are 2 screws at the front, remove them and the top section pushes back or forwards (I can't remember) and lifts off. The rest you should be able to work out. To remove the fuser (when you get there) Large screw with spring on left side of fuser (looking from the rear of the machine), small screw on right (hidden), you will need to loosen the fan filter, remove large white gear, remove gear with metal support attatched to fuser. You will see what I mean if you need to do all of this. Good Luck! But try the reset first! Dazz UK
Hi, I have a BRO MFC 9750, keeps coming up with Error Code 76. I have tried to enter the reset code as given (Menu 2 8 6 4), but it just gives multiple beeps when I get to 8! I am an auto engineer so this is really bugging me! I don't know if I am entering the code in a incorrect way?!? I simply pressed MENU, then 2,8,6,4 (but only got to 8!)
Check the harness connection between the density sensor holder ASSY and registration relay PCB, and the one between the registration relay PCB and engine PCB. Then, reconnect them.
Check the harness connection between the engine PCB and registration relay PCB and reconnect them.
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