Printer and Photocopier Troubleshooting and Repair Collection : Sharp SF-7100 copier drum replacement   
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Sharp SF-7100 copier drum replacement

"I have a Sharp SF-7100 copier. When I call about a replacement drum, people tell me it uses a Master. What is a Master? Can I install it myself. Does anyone have a service manual for this copier?"

(From: Lionel Wagner (ck508@FreeNet.Carleton.CA).)

The Master is the SURFACE of your photo-sensitive drum. In a brilliant design concept, Sharp allows you to easily replace a thin (in your case) cardboard sheet, that effectively gives you the performance of a new drum at a fraction of the cost. There is no wiper blade, residual toner is removed by polarity reversal and is re-absorbed in the developer. Cardboard Masters for your machine are in short supply. Let me know if you can find some. You may wish to upgrade to an aluminum backed Master used in model SF760, but they are much more expensive.