Question about Brother IntelliFAX 4750 Plain Paper Laser Fax
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Posted on Jan 02, 2017
SOURCE: Brother Fax 4750 System error 76
try resetting the machine by pushing the features button, and then *2864 in quick succesion, if done correctly you will enter test mode, then enter 91, and then after that clears enter 99 to exit test mode. make a copy to see if it works, and if it doesn't it is time to replace the fixing assy.
Posted on May 12, 2008
Mine was indeed a gear problem. Took off the top cover and poked around. Found two areas that may have caused the grinding.
1. The lower roller shaft had slid to the left out of it's groove. By removing the handset cradle (3 release tabs are accessed underneath the toner hatch.) I could loosen the "gear box" (a black contraption with all the gears inside) and then snug the bottom roller into proper position.
2. I removed the "gear box" to look around. Don't know if I dislodged one of the gears while doing so, but noticed one was dislodged ;-)
This required opening up the gear box by removing 2 screws and lifting off the motor. Then i could get at a gear that had come loose from a claw sort of piece. Note: the teeth of the loose gear needed to be on the motor side when sliding it back into the claw thingy. It seems to use a metal clip for friction control and perhaps proper spacing.
I noticed "some" wearing of gears, but doubt this is an issue. This machine has been used VERY hard for years and now, just by re-aligning things, it works once again.
My googling barely found any mention of troubleshooting this machine, so I shudder to think what finding parts would be like.
Posted on Jan 21, 2009
Printing irregularites on sent faxes are due to spots or a dirty scanner.
Spaces on received faxes are due to a dirty drum, corona wire, or a failing or improperly installed toner cartridge. A new cartridge should be gently shaken back and forth sideways prior to installation.
Posted on Jun 23, 2009
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