Adcom GFA-5400 - Manual (Page 7)

THERMAL PROTECTION LEDs O
The GFA-5400 is provided with a thermal protection circuit, which will shut down the amplifier if either heatsink's
temperature reaches 85°C. The THERMAL PROTECTION LEDs will light whenever the thermal protection circuit on its
respective channel has been triggered and the amplifier is inoperative. The thermai protection circuitry will typically be
triggered by very high power demands into impedance much lower than the amplifier is capable of driving at those levels. If
either amplifier channel’s output through the loudspeaker(s) ceases abruptly, and one or both of the THERMAL PROTECTION
LEDs glow, you will know that its heatsink temperature has become unacceptably high and the circuitry is protecting the
amplification devices. Please note that the POWER LED will remain on and the amplifier will still be energized. Once the
temperature of the heatsink(s) drops to a safe operating level, the amplifier will automatically resume operation.
Activation of the thermal protection circuitry in the GFA-5400 is an indication that the amplifier has been overdriven or
that the load the loudspeakers are presenting to the amplifier is unreasonably low. If you wish to prevent recurring activation of
the thermal protection circuitry, you must reduce the volume level demands or correct the load-impedance condition which may
be causing activation of this circuitry, or both internal protection fuses may blow.
CARING FOR YOUR GFA-5400
Great care has been taken by ADCOM to ensure that your amplifier is as flawless in appearance as it is electronically.
The front panel is a heavy gauge, high-grade aluminum extrusion carefully finished and anodized for durability. The chassis,
top cover and rear panels are heavy gauge steel, that has been powder coated and baked to ensure a lasting finish. If the front
panel, top or sides become dusty or finger printed, they can be cleaned with a soft lint free cloth, slightly dampened with a very
mild detergent solution or glass cleaner.
WARNING!
Do not spray or pour liquids of any kind on the GFA-5400.
SERVICING
ADCOM has a Technical Service Department to answer questions pertinent to the installation and operation of your unit. In the
event of difficulty please contact us for prompt advice. If your problem cannot be resolved through our combined efforts, we
may refer you to an authorized repair agency, or authorize return of the unit to our factory. To aid us in directing you to a
convenient service center, it would be helpful if you indicate which major city is accessible to your home.
Please address mail inquires to:
ADCOM Service Corporation
10 Timber Lane
Marlboro, NJ 07746 USA
Phone, Fax or E-mail inquires to:
Tel.: 732-683-2356
Fax: 732-683-9790
Monday through Friday
9:00 AM to 5:00 PM EST
[email protected]
For Fax inquires, please include a return Fax number for the reply. When calling or writing about your GFA-5400, be sure to
note and refer to its serial number as well as the date of purchase and the dealer from whom it was purchased. It is helpful In
any communications to us. Please include a daytime phone number where we may reach you. In the event the unit must be
returned to our factory for service, you will be instructed on the proper procedure when you call or write for a Return
Authorization. UNDER NO CIRCUMSTANCES SHOULD YOUR UNIT BE SHIPPED TO OUR FACTORY WITHOUT PRIOR
AUTHORIZATION, OR PACKED IN OTHER THAN ITS ORIGINAL CARTON AND FILLERS.
If the original shipping carton and its fillers have been lost, discarded, or damaged, a duplicate carton may be obtained
from our Service Department for a nominal charge.
Always ship PREPAID VIA UNITED PARCEL SERVICE (UPS) OR OTHER APPROVED CARRIER. DO NOT SHIP
VIA PARCEL POST, since the packing was not designed to withstand rough Parcel Post handling.
FREIGHT COLLECT SHIPMENTS WILL NOT BE ACCEPTED
UNDER ANY CIRCUMSTANCES.