Ricoh M281 Series Service Manual page 276

Laser Unit (MP 501/601)
4.11 LASER UNIT (MP 501/601)

Turn OFF the main power and unplug the machine before beginning any of the
procedures in this section. Laser beams can cause serious eye injury.
4.11.1 CAUTION DECAL LOCATION
The caution decal is attached as shown below.
4.11.2 LASER UNIT
1. Remove the paper exit tray. (page 4-39)
2. Disconnect the red connector and flat cable from IOB [A].
D255/D256/M281/M282 4-82 SM