scanner

Hello, I have a new problem, a customer brought me a Canon Maxify MB5450. It is a black band when scanning and copying. I disassembled the printer to find the reference of the part (the scanner module), the reference is QK2-0247 2090401570 next to the barcode when searching on Google I found...

:) HI!! I need to buy a printer compatible with my new 12" airbook. This is the model with just one c-usb port. Price is really no object, looking for the best I can get in terms of: 1. Compatible with OS X captain 2. preferably wireless and also compatible with iPhone, iPad etC 3. as small...