11-22 SPARCstation 5 Service Manual—November 1996
11
3. Reconnect the DC power, SCSI data, diskette data, speaker/LED, and
CD-ROM audio cables to the system board.
See Figure 11-18.
4. Take the following components that you removed from the defective
system board and install them on the new system board:
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, “Internal Access.”
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, “Internal Access.”
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