M Ainboard - Konica Minolta bizhub 43 Service Manual

• Set the main switches to the OFF position,
• Disconnect all external interconnect leads (LAN, PTSN, USB),
• Disconnect the mains lead.
3.1 M
AINBOARD
The CPU board is based on the ZORAN 4230 circuit which performs in particular the function of
microprocessor.
The executable code is stored in the flash memory Z1101.
This flash memory is divided in two zones: a zone reserved for the storage of the code and a zone
reserved for the storage of the documents.
The code is loaded from this flash memory into DDR2-SDRAM, and the microprocessor executes its
instructions from the DDR2-SDRAM.
Before printing, the documents to be printed are stored as bitmaps in DDR2-SDRAM.
The DDR2-SDRAM is also used as the working memory for the ZORAN 4230.
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