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Note
An open fuse condition can be also be determined from the scsipba
diagnostic.
If another device on the SCSI bus provides termination power, the bus
can continue to operate normally.
Before replacing the TERMPWR fuse, identify the reason for the failure. Check for
sonrces of short circuits on the SCSI bus cables and connectors.
Check for proper mating
of contact pins on the SCSI bus cables.
Be sure that power is off on the host computer and
peripheral devices when connecting SCSI bus cables to prevent inadvertent shorting.
To remove and replace the fuse, proceed as follows:
1. Remove the card from the host computer as described previously in this chapter.
2 As shown in figure 2-3, pull the fuse out of its socket. It is usually a good idea to
verify that the fuse is open by using a continuity tester.
3. To install the replacement fuse, carefully align the two contact pins with the socket
holes. Then simply press the fuse in. The fuse has no polarity, so the pins can go
into either socket hole.
Wiggle fuse ollghlly whllr pulling lt
Flgure 2-3. Replacing the TERMPWR Fuse
Service Information 2-13