User manual LEXICON GX-7

[. . . ] GX-7 Power Amplifier User Guide IMPORTANT SAFETY INSTRUCTIONS 1. Install in accordance with the manufacturer's instructions. Do not install near any heat sources such as radiators, heat registers, stoves, or another apparatus (including amplifiers) that produces heat. Do not defeat the safety purpose of the polarized or grounding-type plug. [. . . ] Connect the trigger output of the external device to the TRIGGER INPUT of the GX-7 amplifier. The GX-7 will automatically respond when the external device is powered on and off. When the controlling device is turned on, the amplifier will turn on after a short pause. This pause is intentional and serves to protect the speakers from damage while the unit stabilizes. During start-up, you may hear a relay click. This is normal operation. 3 MASTER POWER SWITCH Connects and disconnects power to the AC Input Connector. When this switch is on, the front panel standby/on LED illuminates. When it is off, the front panel standby/on button will not function. Set this switch to off when making or breaking connections to the amplifier. 2-4 GX-7 Basic Operation REMOTE POWER ON WITH EXTERNAL AC TO DC POWER CONVERTER If your preamplifier, processor or receiver does not have a dedicated trigger jack, it is still possible to activate the unit for automatic power on when a Switched Outlet is available on the source device rear panel. To control the GX-7 in this instance, a small AC to DC power converter capable of delivering a 6 to 12 volt DC signal is required. The DC voltage should terminate in a standard 3. 5mm type mini plug. To connect to an external AC to DC Power converter: 1. Plug the AC adapter into a switched outlet that will be activated when you wish to have the amplifier power on. This may be the switched outlet at the rear of an AC receiver or other audio component. Connect the 3. 5mm mini-plug from the adapter to the GX-7 rear panel TRIGGER INPUT. The GX-7 will now turn on and off automatically, depending on the status of the controlling device. 5 AC POWER CONNECTOR The AC input connector provides power to the unit with the supplied power cord. Do not use an extension cord. CAUTION! Never make or break connections to the GX-7 unless the GX-7 and all associated components are powered off. 6 FUSE HOLDER The GX-7 uses internal fuses to protect itself and the speakers from possible damage. In the event that a replacement fuse is needed, be sure that a fuse of the original rating is used. If a fuse continues to fail, the GX-7 may have developed a fault. In this event, contact Lexicon customer service. POWER CONTROL CONNECTIONS The GX-7 features a built-in remote power-on system that will automatically switch the amplifier on when another device in the system is switched on. REMOTE TRIGGER POWER ON To connect to a 12V trigger jack: Using an accessory cable with a 3. 5mm mono mini-plug on each end, connect the trigger-output jack on the rear of the source device to the GX-7 rear panel TRIGGER INPUT. When these connections are made, the GX-7 will automatically power on whenever the triggering device is turned on. 2-5 Basic Operation POWER CONNECTION SAFETY After all audio and system connections have been made, connect the power cord to an AC power source. Be sure that the GX-7 is powered off and that the device connected to the remote trigger input is off when connecting the power cord and plugging it in to an AC outlet. Lexicon All volume and level adjustments are made on your preamplifier, controller or surround processor. [. . . ] Alternatively, customers may contact Customer Service directly to obtain return authorization. However, return authorization must be obtained before any product is shipped to the factory. Products returned without prior authorization will be refused. When obtaining return authorization, please be prepared to provide the model, serial number, and a complete, explicit description of the problem. [. . . ]