User manual PARASOUND HCA855A

[. . . ] 8 Operating Your HCA-1205A or HCA-855A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Maintaining Your Parasound Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 In Case of Trouble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Parasound HCA-1205A Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Before you proceed, find the serial number located on the rear panel of your amplifier and record it here for reference: Serial #____________________ Date of Purchase____________________ Installing and Rack Mounting Your Amplifier Place your amplifier away from heat sources such as air ducts and radiators. Always mount the amplifier horizontally and make sure that your cabinet or shelf can support its weight. It is best to provide a separate shelf for your amplifier rather that stacking it directly above or below other components. With the use of the optional Parasound RMK-3, both the HCA-1205A and HCA-855A occupy three rack spaces (5 1/4") in a standard 19 inch equipment rack. Be sure to use the heavy duty mounting bolts with nylon shoulder washers on both sides of the faceplate to avoid scratching the amplifier's front panel and to help prevent ground loops. When rack mounting equipment, have someone help support the unit while you bolt the component to the rack rails. Ventilation Requirements for Your Amplifier To insure safe and reliable operation, it is very important that the amplifier has plenty of ventilation to prevent overheating and automatic shut down from its thermal protection circuitry. Please observe the following ventilation guidelines when installing your amplifier in a cabinet or other enclosed area: 1) If you are not using a fan, allow at least six inches on each side and above the amplifier, and do not close off the front with a cabinet door or panel. 2) If you are enclosing the amplifier within an equipment cabinet, use a fan to draw in cool air and exhaust warm air. 3) Do not place the amplifier on carpeting that will obstruct the air flow into the bottom of the amplifier chassis and heatsinks. If you do stack components, you must use a fan to circulate the warm air that will quickly become trapped between them when they are powered on. Making Connections to Your Amplifier Leave the AC cord disconnected while making any input or speaker connections. The marked insulation or copper colored wire usually indicates the positive conductor. This demarkation lets you know which wire is connected to the positive and which to the negative speaker terminals so you can do exactly the same on the power amplifier's colored (+) and black (-) binding posts. Minimum Impedance Precautions Connect loudspeakers with a 4 or 8 nominal impedance for normal operation. Both amplifiers are capable of driving speakers with occasional impedance dips below 2 . However, sustained high power operation into loads of less than 4 may cause overheating and is not recommended. AC Power Connections and AC Grounding Before you connect the AC cord, make sure your amplifier's power switch is in the off position and the external DC trigger is off. Do not connect the amplifier to the accessory AC outlet on your preamplifier or processor because the amplifier's current draw will exceed the rating of most preamplifier's power switches and power cords. If you use an external AC line conditioner or surge suppressor, make sure it can withstand the power requirements of the amplifier listed in the specification section of this manual. -7- DC Trigger Connection The DC Trigger allows you to turn on your amplifier with external DC voltage sources from + 9 Vdc to +12 Vdc. Use a two-conductor wire such as an 18 AWG speaker wire to connect the DC trigger from an external source to your amplifier. You should first determine the + DC voltage and ground conductor from the external source. [. . . ] If you choose to send it to Parasound, contact us to obtain a Return Authorization (RA) number. You will be asked to repack the unit in its original packaging including the additional outer box for protection during transit. The Return Authorization number must be clearly marked on the outer carton only. You should ship the unit by UPS with adequate insurance and a copy of your purchase receipt to validate your ownership. [. . . ]