MX-C250  DISASSEMBLY AND ASSEMBLY  10 – 24
D.Scanner unit
(1)Drive belt
1) Remove the scanner upper cover NE. .
When removing the scanner upper cover, press No.1 and 2
pawls inside and slide no.3, 4 and 5 pawls outside. 
2) Check the tension and wear of the drive belt shown in the figure. 
No. Name
1Drive belt
2Glass
3Rail
4 CIS unit