User guide

M4000 Insulation Analyzer User Guide
72A-1230 Rev. F 4-61
July 22, 2005
Replacing the Guard Front Panel Board
Note the location of the Guard Front Panel Board in Figure 4.30 on page 4-60.
It is located immediately behind the Front Panel Assembly. Take the following
steps to replace it:
1. If it has not already been done, remove the Front Panel Assembly. See
Steps 1-8, ”Removing and Replacing the Front Panel Assembly”
on page 4-58.
NOTE Do not remove the replacement board from its anti-static bag until
instructed to do so. See the Note on page 4-48 for additional ESD
precautions.
2. Remove six #8 nuts (Figure 4.31) that secure the Guard Front Panel Board
to the Front Panel Assembly using a 11/32” socket wrench. The nuts are
located at the corners of the board.
.
Figure 4.31 Guard Front Panel Board, Nut Locations
3. Remove two #8 nuts (Figure 4.31) that secure the ground connectors to the
Guard Front Panel Board. Move the connectors off the board.
4. Disconnect two ribbon cables (W12 and W21).
5. Disconnect two ground wires (one orange and one white/green). Pull the
wires straight up to make board removal easier.
Ground Nuts
Nuts