Sun Microsystems SPARCstation 5 Model 110 - Setting Jumpers

11-22 SPARCstation 5 Model 110 Service Manual • November 1996
a. NVRAM
See Section 11.5.2 “Replacing the NVRAM Chip.”
b. DSIMMs
See Section 11.3.2 “Replacing a DSIMM.” Install the DSIMMs in the same
locations on the new system board.
c. SBus cards
See Section 11.1.2 “Replacing an SBus Card.” Install the SBus cards in the same
locations on the new system board.
5. Detach the wrist strap and replace the cover.
See Chapter 7.
6. Reconnect all external cables to the rear panel.
7. Power on the system.
See Section 6.2 “Powering On the System.”
11.4.3 Setting Jumpers
There are two serial port jumpers on the system board. The jumpers are factory-set
to RS-423 mode (position B in
FIGURE 11-23). The ports can be reset to RS-232 mode
(position A) for connection to an X.25 network in Europe or Australia.
To change the jumper settings from RS-423 mode to RS-232 mode:
1. Shut down and power off the system.
See Section 6.1 “Powering Off the System.”
2. Remove the cover and attach a wrist strap.
See Chapter 7.
3. Use needlenose pliers to move both serial port jumpers from position B
to position A.
See
FIGURE 11-23.