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Changing the Main AC Power Fuse
To test or change the main AC power fuse, do the following:
•
Unplug the AC power cord from the IEC receptacle on the rear panel of the RMC-1.
•
Carefully pry up the small plastic panel with the picture of a fuse on it - located adjacent to the
power cable opening. The panel should snap, then slide straight out like a drawer.
•
Test the fuse, and replace it if it tests "bad", or if it is obviously cracked or charred.
•
Carefully replace the fuse holder. The little tab on the panel should face towards the power
cable cutout. Make sure you have it facing the right way, and that you snap it firmly in place.
Note: The fuse should fit quite loosely in the small plastic clip in the side of the fuse holder. It
will engage the electrical fuse contacts tightly when the panel is in its closed position. The fuse
holder itself snaps quite firmly into position, and should sit flush when properly inserted.
Changing the Internal Power Supply Fuses
The power supply fuses on the RMC-1 are located on the power supply board, which is located
inside the RMC-1, mounted to the bottom of the chassis, towards the front of the unit. To access
the power supply board, you will need to remove the outside top cover of the RMC-1.
To test or change the power supply fuses, do the following:
•
Unplug the AC power cable from the RMC-1.
•
Allow the RMC-1 to sit unplugged for ten minutes to discharge the power supply.
•
You will need access to the top, sides, back, and bottom of the RMC-1, so move it to a location
where you have room to work, and be sure to place it on a soft or padded surface to avoid
scratching the finish; a clear area on a carpeted floor will work fine.
•
Remove and carefully set aside the eight screws securing the top panel to the RMC-1
(three on each side, and two on the rear panel, all near the top edge of the RMC-1).
•
Remove and carefully set aside the top cover.
•
You should now see the two power supply fuses, located on the top of the power supply
board (near the front of the RMC-1).
•
Test each fuse, and replace it if it tests "bad", or if it is obviously cracked or charred.
To close your RMC-1 back up for use after testing or changing the internal fuses, do the following:
•
Replace the top panel of the RMC-1, and replace the eight screws securing it.
•
Replace the power cable.
•
It's a good idea to confirm that your RMC-1 is now working before replacing it in your
equipment rack and reconnecting it.
Fuse Values
All fuses are 20mm x 5mm 250 V time delay type: T250
[Specific values for replacement fuses will be included in the final version of this manual.]
Care and Maintenance
Page 84
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