User manual ADCOM GFP-710

[. . . ] Perhaps Audio Magazine said it best: "No competing company I know can provide a similar balance of sound quality, power and affordability. " AWARD WINNING Innovation is our stronghold, and our numerous awards year after year prove that we're never satisfied to rest on our reputation. From our legendary high current amplifiers to our state-of-theart digital processors, Adcom components consistently impress even the most demanding audiences. Adcom components have won over 25 Product of the Year and Special Recognition citations from Audio Video International, 3 Diapason D'Or Awards, 7 Consumer Electronics Show Design and Engineering Awards, and have appeared on Stereophile's "Recommended Components" lists over 70 times since 1988. A reputation worth its weight in gold. ENGINEERING PASSION Every Adcom component is not only designed to reproduce the highest quality sound and picture, but to also deliver the greatest possible value. [. . . ] To realize the full potential of your new stereo preamplifier, and before making any connections to it, please read these operating and installation instructions thoroughly. carton and all packing material as they are intended to reduce the possibility of transportation damage should the preamplifier ever need to be shipped again. In the unlikely event damage has occurred, notify your dealer immediately and request the name of the carrier so a written claim to cover shipping damages can be initiated. The right to a claim against a public carrier can be forfeited if the carrier is not notified promptly in writing and if the shipping carton and packing materials are not available for inspection by the carrier. Save all packing materials until the claim has been settled. The optimal perfomance of your new GFP-710 will ultimately depend on the care with which you make the connections between the amplifier, preamplifier and loudspeakers. All input and output signal connections should be made only with high quality, low-loss, low capacitance cables. For recommendations of the type and quality of interconnections that are best for your applications, consult with your ADCOM retailer. Safety Information There are no user serviceable parts inside. The unit must be connected to a power supply only of the type and voltage specified on the rear panel. Connect the component to the power outlet only with the supplied power supply cable or an exact equivalent. The cable should be connected to a 3-pin polarized wall outlet, matching the wide blade of the plug to the wide slot of the receptacle. Do not route the power cord where it will be crushed, pinched, bent, exposed to heat, or damaged in any way. Pay particular attention to the power cord at the plug and where it exits the back of the unit. Connect Tape Out to the Record or Input jacks of the recording device. External Processor: The processor in/out connectors allow for convenient [17] Remote Sensor Extension Input Expand the remote control capabilities of the GFP-710 by using an ADCOM XR500II via an external room or zone. ext. proc mute [18] AC Fuse Holder This unit is protected from electrical overloads that may be sent to the unit from a surge or lighting strike though the use of a fuse. If the fuse blows always ADCOM GFP-710 Owner's Manual | 7 SYMPTOM Power LED does not glow. Problem with source unit (CD, tape, etc. ), or RCA cable connecting that source unit to the preamp. Some major appliance, dimmer, halogen or fluorescent light is creating interference. POSSIBLE SOLUTION Plug in AC Power Cord(s). Make sure all appliances, dimmers and suspect lights are off. Power LED glows, but no sound One channel not producing sound Hum from all speakers at any volume Hum from all speakers (hum goes up or down with volume) Hum from the amplifier itself Troubleshooting Use the troubleshooting notes above to solve common situations that don't require professional attention. If the steps stated in possible solution do not resolve your problem, then please contact your ADCOM dealer or call the ADCOM customer service department. Any problems not covered here should be brought to the attention of your ADCOM dealer or ADCOM customer service department. A special note on "hum:" When there is a low-volume "hum" audible throughout your speakers, even with the main volume turned all the way down, you have a common phenomenon known as a "ground loop. " A ground loop is basically a difference in ground voltages between two or more components which are connected electrically and which creates multiple current paths where there must only be one. This difference in potentials creates a 60Hz lowlevel sound (approximately a low A), that seems to "hum. " It can be caused by adding new components to your system, but that does not imply there is anything electrically wrong with any new component. [. . . ] 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. [. . . ]