Adu (Adf Drive Unit) - Ricoh IS450S Service Manual

MAIN PCBS AND THEIR FUNCTIONS

2.8.4 ADU (ADF DRIVE UNIT)

The ADU drives the motors and clutches in the ADF unit. Also, it informs the
sensor status to the SCU.
The SCU generates the control signals for each electrical component and the
endorser, then these are sent to the ADU through the IOB. The drivers on the ADU
convert the control signals into drive pulses for the motors.
A D U
Motor Driver
Motor Driver
+ 5V
+ 24V ADU
+ 12V
- 12V
+ 5V
+ 24V ADU
+ 5V
+ 12V
- 12V
+ 15V
2-30
22 December 1998
Paper
Transport
Motor
Paper
Feed
Motor
Clutches
Sensors
E D U
CIS Unit
G411D511.WMF