Brother MFC8420 Service Manual page 111

CHAPTER 4 DISASSEMBLY AND RE-ASSEMBLY
(8) Remove the guide shaft from the CCD module.
(9) Release the belt from the pulley ASSY.
(10) Remove the belt support rubber, and then remove the belt from the CCD module.
(11) Disconnect the FFC cable from the CCD module.
(12) Remove the CCD module from the scanner base.
Belt
7
CCD module
Belt support rubber
6
3
Belt
Guide shaft
CCD module
2
1
Scanner base
Fig. 4-51
4-30
Belt
5
4
Pulley ASSY