Oki OKIOFFICE84 Maintenance Manual page 260

Meaning of abbreviations used in Block Diagram
A/D : Analog-to-digital converter
AMP : Amplifier
BATT : Battery
CNi : Connector number i
CPU : Central processing unit
D-MOTOR : Drum motor
DRV : Motor drive
DRAM : Dynamic random-access memory
IEXSEED300 : Image proccessing gate array
FLASH : Flash memory
IOGA 4 : Input output gate array
PCi : Photocoupler number i
POW.UNIT : Power supply unit
RTC : Real time clock
S-MOTOR : Send motor
SRAM : Static random-access memory
X'tal : Crystal oscillator
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GENERAL
40672201TH Rev. 4