User manual PARASOUND HCA1206

[. . . ] O W N E R ' S M A N U A L HC A-1206 High Current Multi Amplif ier LUCASFILM CASFILM L ¤ ® Congratulations on your purchase of this precision audio component and thank you for your selection of Parasound. Your HCA-1206 was designed by renowned circuit designer John Curl to meet or surpass the stringent standards required by Lucasfilm for use in THX Home Cinema systems. Each part within your HCA-1206 has been painstakingly selected for optimum sound quality on even the most challenging music and film soundtracks. Please take a few moments to read these instructions so you may fully understand the capabilities of your new Parasound power amplifier. i Amplifier HCA-1206 High Current Mult LUCASFILM Overload Power CH 1 Operation Stand by CH 2 CH 3 CH 4 CH 5 CH 5 Unpacking Your HCA-1206 The HCA-1206 is packed in two strong cardboard cartons. [. . . ] Spade Lugs If you prefer to use speaker cable with spade lugs, make sure you do not permit the lug to rotate as the terminal is tightened. Do not overtighten the speaker terminal onto the spade lug. The limited warranty does not cover terminals that are sheared off as a result of overtightening. Bare Wire If you use bare wire without plugs, make sure you strip off only enough insulation so the bared wire fits into the hole that runs sideways through the terminal's metal shaft. Before inserting the wire, twist all its strands tightly to prevent strays that could cause a short circuit between + and -- terminals or adjacent channel terminals. If you have a soldering iron, it is a good idea to "tin" the bare wire with solder to keep it from unraveling and prevent oxidation. -5- Mono Bridging -- Channels 3+4 and 5+6 When you bridge channels 3+4 and/or 5+6, your speakers are connected to the bridged channels differently. You bridge by using the red + terminals of the adjacent channel pairs only. Note that bridged connections are made horizontally rather than vertically and the upper red + terminals have separate markings for bridging. In the bridged mode, channel 4 (and/or 6) output is positive and channel 3 (and/or 5) output is negative. Unbridged speaker connections can be made with standard 3/4" (19 mm) dual banana plugs. However internal space required by the high current protection relays prevent the bridged terminal pair spacing to be close enough to accept 3/4" (19 mm) dual banana plugs. Single banana plugs, spade lugs, or bare wire termination are required. Select MONO BRIDGING (up) or SEPARATE (down) as marked on the rear panel. Switch the power off before moving either of these switches. If you accidentally leave either switch in the mono bridge position, the stereo output will be very weak and distorted. For bridged operation of channels 3+4, use only the input jack and level control for channel 4. It will light for about four to five seconds while the amplifier circuits are stabilizing before the six protection relays start to energize. At this time the red LED will turn off and the green Operate LED will come on to signal normal operation. It will also light up red whenever there is a short circuit or fault which triggers the protection circuits. Whenever the red LED illuminates, no sound can be heard. If the red Standby LED lights up during operation it could indicate that more DC is present than its servos can handle, a short circuited speaker line, or possible internal fault. Once the problem has been corrected, the protection circuits will automatically reset. [. . . ] Please refer this conversion to a skilled electronics technician to avoid personal injury or possible harm to the amplifier. There are hazardous high voltages present inside the chassis even after the power is turned off and the AC cord has been disconnected. As it is supplied for 110 V-120 V operation, the red and white transformer primary wires are connected together. The yellow and black primary wires are also connected together. [. . . ]