Ricoh FT6645 Manual page 241

OPTICS
2.6 SCANNER DRIVE MOTOR
[E]
[F]
[C]
[A]
1. Remove the exhaust fan. (Refer to Scanner HP Sensor Replacement.)
2. Remove the tension spring [A].
3. Remove the tension tightener [B].
NOTE: Re-install the tightener as follows;
1) Hook part [C] of the bracket on the screw [D] installed on the
scanner drive motor bracket.
2) Hook the tension spring [A].
3) Install two screws.
4. Remove the two connectors [E] from the Optic Control Board.
5. Remove the scanner motor [F] (4 screws).
NOTE: While replacing the drive pulley, the gap [G] should be 0.5mm so
that the upper edge [H] of the pulley is lower than the upper
surface [I] of the bracket, as shown. After installing the scanner
motor, perform the scanner control adjustment. (Refer to Scanner
Control Adjustment.)
[B]
5-16
23 April 1993
[D]
[H]
[I]
0.5 mm
[G]