Emotiva XMC-1 User Manual page 89

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 XMC-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 XMC-1 are located on the power supply board, which is located
inside the XMC-1, mounted to the bottom of the chassis, towards the front panel, and under
the internal protective shielding enclosure. To access the power supply board, you will need to
remove both the outside top cover of the XMC-1 and the internal shielding enclosure.
To test or change the power supply fuses, do the following:
• Unplug the AC power cable from the XMC-1.
• Allow the XMC-1 to sit unplugged for ten minutes to ensure that the power supply capacitors
are fully discharged.
• You will need access to the top, sides, back, and bottom of the XMC-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 XMC-1
(three on each side, and two on the rear panel, all near the top edge of the XMC-1).
• Remove and carefully set aside the top cover.
• Remove the four screws securing the shielding enclosure to the front panel of the XMC-1 and
carefully set them aside (located just behind the front panel).
• Now, carefully stand the XMC-1 on its side, and remove the two screws on the bottom of the
XMC-1 securing the bottom edge of the shielding enclosure to the chassis.
• Place your XMC-1 back in an upright position and remove the shielding enclosure.
Note: you will NoT be required to disconnect any ribbon or other cables to remove the
shielding enclosure, however you should be careful to avoid pulling or otherwise damaging or
disconnecting any cables while removing the enclosure. you may have to press the corner of
the shielding enclosure closest to the Volume knob towards the bottom of the XMC-1, then pull
it towards the rear of the XMC-1, to get it to clear the mounting lip on the front panel.
• You should now see the two power supply fuses, located on the top of the power supply
board (near the front of the XMC-1; previously under the shielding enclosure).
• Test each fuse, and replace it if it tests "bad", or if it is obviously cracked or charred.
Care and Maintenance
Page 83