Adcom THX GFA-7000 - Manual (Page 6)

O AC Fuse
The AC Fuse protects the electronic circuits of the GFA-7000. This fuse, normally, will
blow only if there is an overload within the GFA-7000. It may, however, blow if the amplifier
attempts to deliver very high power into very low-impedance loudspeakers. In either case, BE
SURE TO REPLACE THE AC Fuse ONLY WITH AN EXACT REPLACEMENT FUSE. The
proper fuse values are:
Fuse Rating BUSS® Littlefuse®
For 115 volt operation.... 15 Amp 250 Volt............... ABC-15/250V........... (SAG) 314015/250V
For 230 volt operation.... 8 Amp 250 Volt................. AGC-8/250V............. (3AG) 312008/250V
WARNING
Before attempting to replace a blown fuse, be certain to unplug the AC Power Cord from the AC
wall outlet to prevent possible electrical shock.
Replace the AC Fuse 0A7/y with one identical in type and rating as printed on the rear panel. DO
NOT USE ANY SUBSTITUTE FUSES WITH DIFFERENT RATINGS OR VALUES. Failure to
observe this precaution may cause serious damage to the amplifier circuits, MAY CREATE A
FIRE HAZARD, AND MAY VOID THE WARRANTY.
If the Power LED (O) does not glow, it may be an indication that the AC fuse has blown. If
you are not sure, or the amplifier displays other symptoms, please consult the RESOLVING
PROBLEMS section on page 11. To remove the fuse-holder cap, you will need a %” standard
flat-blade screwdriver. Place the screwdriver in the recessed slot in the cap. Turn the cap V b -
turn counter-clockwise (to the 10:30 position), until the cap pops out towards you. Grasp the
cap with your fingers and pull it completely out. The fuse is inserted in the back of the cap;
gently pull it free. Since the fuse has a ceramic body, you cannot visually examine the fuse
element, it is therefore suggested that you replace it with an identical substitute or bring the fuse
to your Adcom dealer so they may check its integrity. To replace the fuse, insert it in the back
of the fuse-holder cap. Place the cap into the fuse-holder with the arrow Vs -turn to the left of
center (10:30 position). Place the screwdriver in the recessed slot, gently press in and turn Vs-
turn clockwise (to the 12 o’clock position)
O AC Power Cord
The AC cord provides power to operate all the GFA-7000’s circuits. Its plug can be
connected to a standard wall outlet provided the outlet supplies a voltage compatible with the
power requirements printed on the rear panel of the GFA-7000.
The GFA-7000’s power cord is supplied with a “polarized” AC plug as required by UL/CSA
standards and the National Electrical Code. To minimize the risk of electrical shock and to
insure minimal hum from the system, do not defeat the polarity insuring feature of the plug (one
wide blade and one narrow blade). To prevent electrical shock, do not use this polarized plug
with an extension cord or AC outlet unless the blades can be fully inserted to prevent blade
exposure.