Chapter 3 Hardware Installation

Page 3 - 10

 

Step 2: Jumpers and Termination

SCSI bus

Termination

Note

Two types of SCSI bus terminators are used on the RF3880 mother board. The first two in each column, closest to the SCSI connector, are 330—ohm SIPs, and the others are 150—ohm SIPs.

Each end of the SCSI bus cable must be terminated to prevent corruption of the data and control signals. The RF3880 adapter has terminator packs on the board. These are removable in the case that the adapter is not at the end of the SCSI cable.

The adapter provides termination power on the SCSI bus cable. This line is fused on the board. The fuse is replaceable.

The location of the terminators and removable termination power fuse are shown in the following illustrations.

The following figure illustrates the board termination.

Figure 11 Board Fuse and Terminators

Note

It is very important to replace the termination fuse with an exact equivalent. If you replace the termination fuse with a value lower or higher, you risk continued problems or damage to the RF3880 and attached equipment.

Replacement Fuse

In the event that the termination power fuse is blown, replace it with:

Littlefuse P/N 273-002 or equivalent

21020285 D

User’s Guide

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Image 52
Ciprico Rimfire 3880 manual Scsi bus Termination, Replacement Fuse