Ricoh SAVIN D0AP Service Manual page 642

SCB (MF Model Only)
In the MF model, the functions of the engine board and the controller board of the previous
machine have been brought together and mounted on a single board, the SCB (System
Controller Board). Combining these two functions on one board reduces the number of
controller SC errors generated by communication problems between the two separate boards
of the previous model.
The SCB board controls the following functions:
• Engine sequence
• SDRAM
10Base-T/100Base-Tx/Giga Ethernet
•
USB2.0
•
NVRAM
•
Operation panel interface
•
PSU (Power Supply Unit)
Generates DC power from the wall socket AC power supply, and supplies it to each control
circuit
HVPS (High-Voltage Power Supply)
Generates the high-voltage power required for process control.
FCU
Controls the fax program.
NFC Board
Controls the interface with the NFC module.
DC Switch
Controls the on/off operation of the DC power supply.
Toner End Sensor (Toner End Detection Board)
Detects whether the toner has run out.
SBU (Sensor Board Unit) (MF Model Only)
Converts the image reflected from the front side of the originals into digital image signals, then
transmits them to the SCB.
D0AP/D0C4/D0C5/D0C6/M0BQ/M0D1 7-80
Boards
SM