Oki Pos 441 - Manual (Page 9)

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3. Parts Identification and Nomenclature
Printer cover
Protects the printer from dust and reduces noise.
Do not open the cover while printing.
Control panel
Features one control switch and two indicators
to indicate printer status.
Interface connector
Connects the printer with host
computer.
Power switch
Turns printer power
on and off.
Peripheral unit drive circuit connector
Connects to peripheral units such as cash
drawers, etc.
Do not connect this to a telephone.
Power connector
For connection of the power cord.