User manual RENKUS-HEINZ P2800

[. . . ] KEINE BENUTZER BEDIENUNGSTEILE IM INNERN. BEDIENUNG NUR DURCH QUALIFIZIERTES BEDIENUNGSPERSONAL. CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE THE COVER. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL CAUTION RISK OF ELECTRIC SHOCK: OPEN ONLY IF QUALIFIED AS SERVICE PERSONNEL To reiterate the above warnings: servicing instructions are for use by qualified personnel only. To avoid electric shock, do not perform any servicing other than that contained in the Operation Instructions unless you are qualified to do so. [. . . ] Channel 1 (and 2) Output Connector 4-Pin Neutrik Speakon connector provides single-connector, quick-disconnect facilities for both Channel 1 and Channel 2 outputs. The Channel 1 output is on pins 1+ & 1- and the Channel 2 output on pins 2+ & 2-. Pins 1+ & 2+ are considered "hot" while pins 1- & 2- are "common". Note: If your amplifier has a C12 or C22 controller module or L20 limiter module, instead of the standard input module shown in the above drawing, please turn to pages 10 and 11. 4. AC Power Cord Before connecting the amplifier, check the AC voltage requirement and make certain the unit is connected to the proper voltage. Failure of the unit will result if a 120 volt amplifier is connected to a 220 volt power line. Output Connections Circuit Breaker 5. Line Protect (Circuit Breaker) Standard Input Module Ground Lift Switch Circuit breaker and associated "Line Protect" switch provide overall protection; must be manually reset. The Ground Lift switch is used to separate the signal ground circuit from the amplifier ground circuit and thus, eliminate hum induced by ground loops. In the left "ON" position, the signal ground is electrically disconnected from the amplifier ground circuit (the chassis). In the center "OFF" position, the input signal ground is electrically connected to the amplifier ground circuit (the chassis). The outputs are separate and in phase and both input attenuators are active to permit different level settings for each channel. Channel 2 Audio Input Connector Female 3-pin XLR type input connector. We recommend the use of pin 2 as "hot" and pin 3 as "neutral". When the amplifier is connected to a balanced source, the shield may either be lifted or connected at the source end. The choice should be made on the basis of minimum hum. With an unbalanced source, connect the signal to pin 2 and source ground to pin 3 (connecting the signal to pin 3 is not rcommended as this will cause a 180 phase inversion at the amplifier outputs). Note: Improper operation results when only pin 2 or only pin 3 and pin 1 (ground) are used for an unbalanced input. The Ground Lift switch is used to separate the signal ground circuit from the amplifier ground circuit and thus, eliminate hum induced by ground loops. In the right position, the input signal ground is electrically connected to the amplifier ground circuit (the chassis). In the left position, only an AC connection is provided between the signal ground and the amplifier ground circuit (the chassis). Female 3-pin XLR type input connector for Channel 1. Channel 1 "FR/HPF Output" Connector Male 3-pin XLR type controller output connector for the FR/HPF channel; used to drive additional amplifiers. [. . . ] In the right position, an AC only connection is provided between the signal ground and the amplifier ground circuit (the chassis). 13 Input Connectors Limit Set Switches Output Mode Selector Ground Lift Switch P2800/P2950 OPERATION MANUAL Amplifier Setup and Operation Mounting The P2800 and P2950 amplifiers are designed to be mounted in standard 19" racks. They have 4 front panel mounting screws. Because of their depth and weight it is imperative that the amplifier be supported at the rear in any portable application. [. . . ]