Oki 4M - Manual (Page 96)

7 - 3
7.2 PCB Layout
7.2.1 Main Control Board (HBMC-2 PCB) (OKIPAGE 4w Plus)
Short Plug
SP1
Plug Setting
A External EPROM is valid.
Mask ROM in the CPU is valid. B
Content Remarks
For a Chinese product and all maintenance parts.
For all products except Chinese product.
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