C353 loud grinding noise

See page 2-25 of service manual and confirm mechanical parts are in their proper position.

brother-dcp-7030-7040-7045n-mfc-7320-7340-7440n-7450-7840n-7840w-service-manual.pdf (laserexpressinc.com)

i reccomend you check the drive belt if its worn, damaged, or misaligned. motor bearings that are damaged can result to result in grinding noise

There are a few possible reasons why your car might be producing a very loud, continuous sound that can only be stopped by disconnecting the battery. Some potential causes include:
1. A faulty starter motor: If the starter motor is faulty, it can cause a loud grinding or buzzing noise when attempting to start the car.
2. A malfunctioning alternator: If the alternator is not functioning properly, it can cause a loud whining or grinding noise.
3. A stuck fan belt: If the fan belt is stuck or has become worn and is slipping, it can cause a loud squealing noise.
4. A stuck horn: If the horn is stuck, it can cause a loud, continuous honking sound.
To determine the cause of the loud noise, it is recommended to have the car checked by a professional mechanic. They will be able to diagnose the issue and suggest the appropriate repairs. In the meantime, to stop the noise, you can try disconnecting the battery as a temporary solution. However, it is important to identify and fix the root cause of the issue to avoid further damage to the car.

Remove the cover from the motor housing and check the drive gear.

Back up your files and buy a replacement drive the grinding noise is the hard drive experiencing mechanical failure and may stop working soon.

hello Frank. Sorry to tell you that the magnetron is going bad and making that terrible noise. Since the inside of a microwave, even unplugged has up to 2000 residual and deadly volts of electricity I recommend either calling a pro or replacing the unit.

I had a persistant grinding noise about 30 seconds after the printer finished printing. It's been going on about 2 months. I did one thing which seemed to work. So try opening the cover on the back of the machine by lifting upward on the gray lever in the middle of the back of the machine. Leave this cover open during and after printing. The grinding noise went away.

Mine makes a grinding noise when scanning or making copies. As long as everything is working, I just tolerate the noise in which the rest of the staff find amusing at first and then ignore it as I do.

The motor for the auger drive runs pretty slow (about 18 rpm), it could be the drive is running continuously (unless the door is open). Check that and let me know some more info, is the noise real loud, soft, etc. Can you feel anything vibrating or running when the door switch is pressed in?