What To Do; What Next - Sun Microsystems Enterprise 220R Service Manual

3.16.2

What to Do

1. Locate the jumpers on the main logic board.
A main logic board jumper is identified by its jumper address, labeled on the
board with the letter "J" followed by four numbers (JXXXX). Jumper pins are
located immediately adjacent to the jumper address. On the board, pin 1 is
marked with an asterisk.
For information about jumper locations, see Section 3.15 "How to Set the Serial
Port Jumpers" on page 122.
2. Set the main logic board jumpers J2703 and J2804.
Using long-nose pliers, place a shunt over the appropriate pins according to the
following table.
Flash PROM
jumper
J2703
J2804
3.16.3

What Next

Complete the following task to reassemble the system:
4 Section 2.7 "How to Replace the System Cover" on page 67
A shunt on A shunt on
pins 1 and 2 pins 2 and 3
selects selects
Write-protect Write-enable
High-half Normal
booting (low-half)
booting
Servicing the Main Logic Board and Components
The default Signal that is
shunt is on controlled
pins
1 and 2 FLASH PROM
PROG
ENABLE
2 and 3 XOR LOGIC
SET
125