Ricoh D124 Detailed Descriptions Manual page 172

No. Component
M15 Scanner Motor
RU Motor Clutches
MC1 Paper Feed Clutch: RU1
MC2 Paper Feed Clutch: RU2
No. Component
Boards
PCB01 IPU (PCB1)
PCB02 PSU (PCB2)
PCB03 MCU (PCB3)
PCB04 HRB (PCB4)
PCB05 COM (PCB5)
PCB06 MB (PCB6)
PCB07 Controller Board (PCB7)
PCB08 SIB (PCB8)
PCB09 RUDB (PCB9)
PCB10 BOW Board
D124
Function
Drives the original feed roller and original exit roller that feed the
original through the scanner unit
Controls the operation of the roll feed roller and the cam shaft
that raises and lowers the roll feeder idle rollers in Roll Unit 1.
Controls the operation of the roll feed roller and the cam shaft
that raises and lowers the roll feeder idle rollers in Roll Unit 2.
Function
Image Processing Unit board. Takes scan data from the SIB,
processes the image data, and sends it to the MCU. The IPU
also controls the HDD unit and the PC interfaces.
Power Supply Unit. Connected to the external power source,
provides DC current that runs the machine and all its
components.
Main Control Unit. The main board of the machine that controls
processing.
Head Relay Board. Mounted behind the print heads in the
carriage. This board: 1) Relays the readings of the DRESS
sensor mounted on the left edge of the carriage unit, 2)
Receives and relays signals from the ink collection tank to the
control board.
Located in the carriage unit behind the K1 print head, relays
signals between K1 print head unit and the HRB.
Mother Board. Interfaces the operation panel and the controller
Controls memory and all peripheral devices.
SIB (Scanner Interface) is the board that controls the scanner,
and serves as the signal I/F board between the IPU and MCU.
Roll Feed Drive Board. Controls the operation of Roll Unit 2.
Provided with Roll Unit 2 (option).
This is the ID chip that holds the ID code that confirms the tank
is the correct one for the machine. The machine software
records a count in this chip every time the maintenance unit
suction cap sucks waste ink from the print heads during
cleaning. When the max limit count Is exceeded, this signals
tank full, and the machine disables the code so that the tank can
no longer be used.
166 Detailed Descriptions