Sharp AM-900 Service Manual page 51

7. Scanner drive block and diagram
7.1. Overall layout
System gear
Gear
7.2. Gear layout
Scan unit drive side gear train
Planet gear B
Drive switching unit
Lever
Pin
Sheet scan drive side gear train
Planet gear A
System gear biasing spring
A
Hold lever
Hold rib
Home position sensor
Motor gear
(drive source)
Scan unit locking lever
3 – 4
Scanner unit
System gear
Drive belt
AM-900U