Main Control Board (Pcr Pcb) - OKIDATA OKIPAGE 8c Service Manual

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Service Guide - OKIPAGE 8c
Chapter 2 Operation

2.1 Main Control Board (PCR PCB)

The control board consists of a CPU (NR4700) block, a memory control LSI block, an interface control
LSI block, a DRAM block, an EEPROM block, a mask ROM block, and an interface block.
Here is the Functional Block Diagram of the main control board (PCR PCB).