Star Micronics SP300 Series manual Installing the Optional Interface Board

2-5. Installing the Optional Interface Board

When using the optional 20 mA current loop interface or the RS-422A interface, the optional interface board must be mounted to the printer’s main logic board. The following is the method of mounting the interface board to the printer’s main logic board.

1Remove the 6 screws on the bottom cover of the printer, then remove the bottom cover.

2Connect the optional interface board connector to connector CN9 on the

printer’s main logic board.

3At the same time, insert the plastic board support of the main logic board into

the hole on the interface board.

4Switch SW5 and SW6 on the main logic board from A-C to B-C.

5Mount the bottom cover to the printer and fasten the 6 screws to fix it in place on the printer.

Bottom cover

Screw

Optional interface board

Main logic board

Board support	SW5
CN9	SW6

Fig. 2-6 Installing the optional interface board

	C	B
A
SW5
	B	C
			A

SW6

Fig. 2-7 Switch SW5 and SW6

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