Sun Microsystems 60 service manual Jumper Descriptions, Figure C-13Selected Jumper Settings

Open

2-3

FIGURE C-13

C.4 Jumper Descriptions

Jumper configurations can be changed by setting jumper switches on the motherboard. The motherboard’s jumpers are preset at the factory.

A jumper switch is closed (sometimes referred to as shorted) with the plastic cap inserted over two pins of the jumper. A jumper is open with the plastic cap inserted

over one or no pin(s) of the jumper.shows the different jumper settings that are used on the motherboard.

Closed

1 1

1-2

FIGURE C-13Selected Jumper Settings

Jumper descriptions include brief overviews of serial port jumpers, flash PROM jumpers, and additional system board jumper and connector blocks.

Jumpers are identified on the system board by J designations. Jumper pins are located immediately adjacent to the J designator. Pin 1 is marked with an asterisk in any of the positions shown (FIGURE C-14). Ensure that the serial port jumpers are set correctly.

J 2 xxx	Part number
	Pins

*

*

*

*

*

*

FIGURE C-14Identifying Jumper Pins

Appendix C Functional Description C-45