Brother IntelliFAX 1840C Plain Paper Inkjet Fax "error codes a1" Questions

...Error codes shown in the "MACHINE ERROR X X " message Error Code X X (Hex.) Error factor ( 71 Polygon motor does not synchronize with the reference clock. ) ( 72 Cannot detect Beam Detect signal. ) ( ...

...A1 error code. Feed rollers look serviceable and the pressure pad is clean. Stops half way thru and scanner feed 'jitters' Any help appreciated Hi There must be some torn paper or something stuck in ...