Replacing the Low Voltage Power Supply Board
4-78 72A-1230 Rev. F
July 22, 2005
Replacing the Low Voltage Power Supply Board
Note the location of the Low Voltage Power Supply Board in Figure 4.23
on page 4-47.
Take the following steps to replace it:
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.
1. Remove four screws (Figure 4.40) using a Phillips-head screwdriver. Two
screws secure the corner brace to the rear panel of the Instrument and two
screws secure the brace to the side panel.
Figure 4.40 Low Voltage Power Supply Board, Screw Locations
2. Lift off the corner brace to access the board.
3. Remove the white Nomex insulator shield located between the Low
Voltage Power Supply Board and the chassis. Simply grasp it and pull it
out.
4. If necessary, move the ribbon cables out of the way to allow access.
5. Release the two connectors on cables W3 and W4 leading from the
Amplifier Assembly.
Screws
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