Adcom GFA-5500 - Manual (Page 7)

AC LINE CORD ®
The AC cord provides power to operate all the GFA-5500'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 of the GFA-5500.
NOTE
The GFA-5500’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 ensure minimal hum from the system,
do not defeat the polarity ensuring 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 other outlet unless the blades can be
fully inserted to prevent blade exposure
AC POWER FUSE ®
The AC POWER FUSE protects the electronic circuits of the GFA-5500. This fuse will normally blow only if there is an
overload within the GFA-5500. For continued protection of the electronic circuits it is strongly recommended that it be
replaced only with a fuse of the same type and value as printed on the rear panel of the amplifier.
Whenever the AC ON/OFF SWITCH on the front panel is turned on and the amplifier is energized, the POWER LED will
glow. If turning on the amplifier does not cause the POWER LED to glow, this may indicate that the AC POWER FUSE is
blown. Unplug the AC LINE CORD from the AC wall outlet and turn the AC ON/OFF SWITCH off and check the fuse. If
the fuse is blown, replace it only with one of the same type and value as printed on the rear panel of the amplifier. If,
after replacing the fuse, it blows immediately upon turning on the amplifier (POWER LED does not glow), a failed
electronic component or other internal problem must be suspected. Make no further attempts at fuse replacement or
operation of the amplifier. Refer the problem to competent ADCOM authorized service personnel.
WARNING
BEFORE ATTEMPTING TO CHECK OR REPLACE A BLOWN FUSE, BE CERTAIN TO UNPLUG THE AC LINE
CORD FROM THE AC WALL OUTLET TO PREVENT POSSIBLE ELECTRICAL SHOCK.
To remove a blown or suspect fuse from its holder, use only a 1/4" standard screwdriver to prevent damage to the fuse
holder. Simply press lightly on the fuse holder cap and turn counterclockwise. The cap will pop out after a quarter turn.
Once a new fuse has been installed in the fuse holder cap, insert it into the fuse holder body and press lightly while
turning the cap clockwise until it is firmly seated. Be certain not to cause cross threading of the fuse holder body and cap
to prevent damage to the fuse holder. DO NOT FORCE THE FUSE HOLDER CAP INTO THE THREADS. Seating of the
cap in the fuse holder body should be easily accomplished without excessive force.
WARNING
The fuses listed here and their time/current blowing points have been carefully selected and thoroughly tested to
deliver optimal performance while still accomplishing their protective functions. Replace the AC POWER FUSE only
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.
AC POWER FUSE For 115 Volt operation: 12 AMP ABC/250V
AC POWER FUSE For 230 Volt operation: 6 AMP ABC/250V
AC ON/OFF SWITCH ©
The AC ON/OFF SWITCH controls power to the power transformer circuits of the GFA-5500. Whenever the GFA-5500 is
energized the POWER LED will glow. Depress the push button switch to energize the GFA-5500. Release the switch to
turn the amplifier off.