Iob (Input/Output Board) - Ricoh IS450S Service Manual

22 December 1998

2.8.3 IOB (INPUT/OUTPUT BOARD)

P S U
Interlock
Switch
The IOB contains the drive circuits for the scanner motor and the exposure lamp.
The control signals such as drive and rotation direction, and drive current for the
scanner motor come from the SCU. Also, the control signal for the exposure lamp
comes from the SCU.
The image signals from the SBU go through this board to the SCU.
MAIN PCBS AND THEIR FUNCTIONS
I O B
Scanner
Motor Driver
Driver
Driver
+ 5V
+ 12V
Driver
+ 24V
+ 24V ADU
2-29
S B U
Scanner
Motor
H.P Sensor
Lamp
Stabilizer
Exposure Lamp
Operation
Panel
A D U
G411D510.WMF