Installing The Top Cover; Changing The Jumpers On The Backplane; Interrupt Jumpers - Intel SYSTEM 310 Hardware Integration Manual

System 310
Installing and Removing Parts
4. Carefully lower the chassis while holding the top cover in place.
The chassis weighs about 40 pounds so be careful you do not
lose control and drop it.
5. Lift the top cover straight up and off its base to expose the
inside of the chassis. Set the cover aside, with its mounting
screws, until you are ready to install it again.
Installing the op Cover
1. After connecting all the cables and making sure all internal
components are secured to their mountings, lower the chassis
cover onto its base.
2. While holding the cover on, roll the chassis over on one of its
narrow sides as you did in step 2 of the last section. Replace
the four mounting screws into the bottom of the chassis and
lower the chassis back down.
CHANGING HE JUMPERS ON HE BACKPLANE
The backplane contains the jumper areas for setting system
interrupts and bus slot priorities. If you need to change them, follow
the next seven instructions. The first four instructions explain how
to change the interrupt jumpers. The last three instructions explain
how to change the priority jumpers.
Interrupt Jumpers
1. Remove the back panel from the chassis by following the
instructions found earlier in this chapter.
2. Remove as many circuit boards as necessary to reach the
jumpers found above the card edge connector for slot 7 (the top
slot). If you disconnect any cables to do this, remember or
mark where they go so you can install them correctly
afterward. If you forget, refer to the section found earlier in
this chapter on connecting cables.
3. Find the interrupt jumpers by looking into the cardcage. These
jumpers appear just above the top card edge connector and are
labeled INTO/ through INT7/. If you have a factory-standard
system, there is a jumper installed across the posts labeled
INTI/ as shown in Figure 5-5.
4. To change these jumpers, reach into the cardcage with your
fingers and move the jumper to another location.
CAUTION
Do not use pliers to remove the jumpers
because they can damage the soft plastic
jumper connector. Use a small hooked tool or
your fingers.
5-9