Question about Brother MFC-8440 All-In-One Laser Printer
I have tried two new high capacity toner cartridges and the drive won't turn them. It clicks and I believe it is designed to slip and click instead of burning out the motor. The gears don' t appear to be stripped. Are the high capacity cartridges harder to turn than the lower capacity ones with less ink? The machine cycles thru without a problem without a cartridge installed. I had no problem with the OEM low capacity cartridge. Thank you.
I was able to find and repair the problem. A shaft with shoulders fits into a thimble which engages and drives the cartridge. The shoulders wore away or were defective. The clicking I heard was the shoulders trying to engage the thimble. I had to purchase a frame L drive unit which is expensive and deep in the machine. It was beyond my expertise but I can only say I was lucky and everything went back together without too many left over screws and it works well. I was able to get the service manual but even with that the repair was sketchy. I had to buy quite a large part in order to replace that small defective part. Compared with the cost of a comparable replacement machine the repair was worth it though.
Posted on Oct 16, 2008
The TN-570's work equally well as the 540's so that's not the problem. The ink is incredibly fluid in its dry powder form and wouldn't make turning with the torque ratio in the machine even notice a difference. Double check that you have the right number replacements and if refilled from an outside source I'd bet its either wrong ones or bad copies. Best to you.
Posted on Oct 15, 2008
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Posted on Jan 02, 2017
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