Ricoh G035 Service Manual page 482

BOARD STRUCTURE
1.9.2 DESCRIPTIONS
1. Printer Controller
The printer controller handles the following functions:
• Printer host interface
• Printing functions
• Operation panel control
• Interface and control of the network interface board
• Interface and control of additional controller options (HDD and DRAM SIMM)
2. Hard Disk (Option)
⇒
This HDD stores the additional soft fonts (both PCL and PS fonts).
3. Network Interface Board
The network interface board is a printer interface to allow the printer to be used
on a network.
4. DRAM SIMM (Option)
There are two DRAM SIMM slots. This is used for an additional printer
processing memory area. 8, 16, or 32 Mbytes standard SIMM modules can be
installed. As a result, up to 72 Mbytes of RAM are installable (8 Mbytes on
board plus 64 Mbytes of optional SIMM).
5. MB (Mother Board)
This connects the controller to the BICU board in the machine.
6. BICU (Base Engine and Image Control Unit)
This is the main board. It controls the following functions.
• Engine sequence
• Timing control for peripherals
7. IOB (Input/Output Board)
The IOB handles the following functions.
• Drive control for the sensors, motors, and solenoids of the printer
• PWM control for high voltage supply board
• Serial interface with peripherals
• Fusing control
G035 1-18
Rev. 03/2000
SM