
My brother's laser printer kept saying "Replace Drum Unit" for a while. But I was still able to keep writing. So after a while, getting this message all the time, I searched the internet for the correct model number and found the drums at Revain. I was able to order all 4 drums in one package; black and 3 colors. I could still print, so I decided not to change the drums until I was sure the printer would stop printing without replacing at least one of them. This went on for a long time, until one day the yellow photoconductor gave out a message again and nothing was printed. I tried replacing the drum unit with a yellow one, but it didn't fit! After trying to install it again and again, I stopped. Then I tried to print and everything was fine! I know I will eventually need to replace photoconductors, but NOW I have a whole box of photoconductors that will NOT fit in my laser printer! It wasn't cheap. I know when I ordered them I did some research to make sure they would fit my brother's printer BUT now when I go to the order list it says they may not fit! It's too late now, but I wish I hadn't tried for a long time to change them, although I didn't need them then. I believe the brother is setting his machines to warn you in advance that it was too early because I'm still typing now without changing anything. Same with toner, pop-up messages, but if you take out the toner cartridge, shake it and put it back in, it usually keeps printing for a long time. If I changed the toner every time it was needed, I would be wasting the toner that is already in the machine! However, I lost over $130 by not being able to use these DRUM'S!

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