C H A P T E R 6 - System Board Jumper Settings

This chapter contains information on default jumper settings. This information enables you to restore the default system jumper configurations if required. See FIGURE 6-1 for the jumper locations. The default jumper settings are listed in TABLE 6-1.

TABLE 6-1 Default Jumper Settings
Jumper ID	Default Setting	Additional Information
JP1 ^[1]	1-2 Fitted 3-4 Fitted 5-6 Not fitted 7-8 Not fitted 9-10 Fitted	Processor core voltage. Do not alter this jumper setting.
JP2	1-2 Not fitted	ALOM Flash ROM swap halves. Only service personnel should modify this setting. Fitting a jumper affects the swap.
JP3	1-2 Not fitted	ALOM reset. Used only for testing the system.
JP4	1-2 Fitted 3-4 Fitted 5-6 Not fitted 7-8 Not fitted 9-10 Not fitted	System configuration. Do not alter this jumper setting.
JP5 ^[2]	1-2 Not fitted	Only service personnel should modify this setting.
JP6	1-2 Fitted (this is a non-functional setting) 2-3 Not fitted	ROMBO enable. Only service personnel should modify this setting. Fit jumper to 2-3 to enable ROMBO.
JP8	1-2 Fitted	Clear CMOS. Only service personnel should modify this setting. Fit jumper to 2-3 to clear CMOS.
JP10	1-2 Not fitted	Override PSON#. Only service personnel should modify this setting.
JP11	1-2 Not fitted	ROM write-protect. Only service personnel should modify this setting.
JP12	1-2 Not fitted	ALOM console bypass. Only service personnel should modify this setting.
JP13	1-2 Fitted (this is a non-functional setting) 2-3 Not fitted	OpenBoot PROM Flash ROM swap halves. Only service personnel should modify this setting. Fit jumper to 2-3 to affect swap.
JP14	1-2 Not fitted	ALOM AFT mode. Used for testing the system only.

TABLE 6-1 Default Jumper Settings

Jumper ID

Default Setting

Additional Information

JP1 ^[1]

1-2 Fitted

3-4 Fitted

5-6 Not fitted

7-8 Not fitted

9-10 Fitted

Processor core voltage. Do not alter this jumper setting.

JP2

1-2 Not fitted

ALOM Flash ROM swap halves. Only service personnel should modify this setting. Fitting a jumper affects the swap.

JP3

1-2 Not fitted

ALOM reset. Used only for testing the system.

JP4

1-2 Fitted

3-4 Fitted

5-6 Not fitted

7-8 Not fitted

9-10 Not fitted

System configuration. Do not alter this jumper setting.

JP5 ^[2]

1-2 Not fitted

Only service personnel should modify this setting.

JP6

1-2 Fitted (this is a non-functional setting)

2-3 Not fitted

ROMBO enable. Only service personnel should modify this setting. Fit jumper to 2-3 to enable ROMBO.

JP8

1-2 Fitted

Clear CMOS. Only service personnel should modify this setting. Fit jumper to 2-3 to clear CMOS.

JP10

1-2 Not fitted

Override PSON#. Only service personnel should modify this setting.

JP11

1-2 Not fitted

ROM write-protect. Only service personnel should modify this setting.

JP12

1-2 Not fitted

ALOM console bypass. Only service personnel should modify this setting.

JP13

1-2 Fitted (this is a non-functional setting)

2-3 Not fitted

OpenBoot PROM Flash ROM swap halves. Only service personnel should modify this setting. Fit jumper to 2-3 to affect swap.

JP14

1-2 Not fitted

ALOM AFT mode. Used for testing the system only.

^{1 (TableFootnote) Changing the setting for JP1 could cause damage to the server.}

^{2 (TableFootnote) Do not change the settings for the JP5 jumper. Only service personnel should modify the settings for this jumper.}