Intel SYSTEM 310 Hardware Integration Manual page 47

System 310
Installing and Removing Parts
1. Unplug the AC power cord from the back of the system. Turn
the chassis so the back faces you.
2. Slide the fuse cover up to expose the fuse and voltage selector
board, shown in Figure 5-1. The AC plug must be removed
before this panel can slide.
3. Remove the fuse by pulling up on the small black lever labeled
"FUSE PULL. " This ejects the bottom of the fuse from the fuse
holder so you can catch it with your fingers and pull it all the
way out. Leave the fuse-pull lever up to keep the sliding cover
out of your way.
Inspect the old fuse to see if the filament is broken or burned. If an
ohmmeter is available, use it to check for continuity. If there is no
evidence of damage, and replacing the fuse does not correct your
problem, call the service number listed in the front of this manual for
assistance.
At this stage, you can also change the voltage selection by continuing
with steps 4 and 5. Otherwise, skip to step 6.
4. Raise the fuse-pull lever, if it is not up already, so it is out of
the way of the voltage selector board. Using the needle-nosed
pliers, grab the board in the middle where there are no exposed
contacts. Wiggle the board up and down until it loosens, and
pull it straight out toward you.
CAUTION
Some voltage selector boards are hard to
remove. Be careful not to use excessive force
while wiggling them loose because the pliers
can damage the board.
5. Select a new voltage setting and install the board. Four
numbers are printed on this board: 120 and 240 on one side, and
100 and 220 on the other side. Replace the board so that the
voltage number you choose faces you when you install the
board. Figure 5-1 shows how to orient the board to select 120
volts (the default selection). Push the board firmly back into
place until the fuse-pull lever is free to drop down.
6. Pull the fuse-pull lever down if it has not already dropped down
and replace the fuse. It does not matter which way you insert
the fuse. Remember to install the 6-amp fuse for 100 or 120
VAC systems and the 3-amp fuse for 220 to 240 VAC systems.
Fuse ratings are scribed on the metal part of the fuse. You can
now plug in the power cord and turn the system on.
5-3