User manual QSC AUDIO DCM 300

[. . . ] 8- Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat. 9- Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one blade wider than the other. A grounding-type plug has two blades and a third grounding prong. [. . . ] SUB OUT provides the exact same signal as the subwoofer output used on DataPort G. It is assumed that you use either DataPort G or the terminal strip connection, but not both at the same time. This connection cannot be monitored or include any of the Fault Analysis functions because there are no connections back from this external speaker. HEARING IMPAIRED OUT is a single mono audio output which contains a mix of the L, C, and R positional signals (Center = +6db compared to L&R). This is usually connected to a special cinema system which supplies headphones to people with hearing difficulties. This can also be used as an input signal to a powered speaker for remote monitoring of basic L/C/R signals in larger projection booths. EX MODE- On the DCM-2 and 3, this connection on the terminal strip allows a remote on/off signal to come from an external surround decoder. This routes the surround signals (I/O) to the "TO SURROUND EX DECODER" connector or directly to the DCM DataPort connections. DCM-1 Terminal Strip Connections DCM-2 and -3 Terminal Strip Connections IEC-type AC Power Cord Receptacle: The power receptacle accepts a standard IEC power cable. The DCM uses a switching power supply that accepts a wide range of AC voltage. 85 to 260 VAC (50/60 Hz. ) is the acceptable AC voltage. The IEC connector also houses the fuses for the DCM. If using the DCM in non-rackmount applications, we recommend the rubber feet be installed on the bottom of your DCM to minimize the chances of scratching any supporting surface. To use the self-adhesive feet: peel off the protective backing from the foot, place near one of the corners on the bottom, and press firmly to activate the pressure-sensitive adhesive. If rack mounting the DCM, secure the DCM to the rack rails using four machine screws and washers of the proper size. Most US rack equipment accepts #10-32 machines screws; length used depends upon application. The DCM will require 3-RU (rack units) of space. To rack mount your DCM: 1- select mounting location 2- have an assistant support the DCM in its mounting location 3- secure the two bottom screws first; do not fully tighten yet 4- secure the top two screws, do not fully tighten yet 5- "fine tune" the DCM up, down, right, or left as required and tighten the four mounting screws 19 INSTALLATION- Rear Rack Ears (optional accessory) SUPPORTING THE REAR OF THE DCM (requires optional hardware) For mobile and touring use, it is extremely important to support the rear of the DCM. The chassis and rack can be damaged if the DCM is not properly supported. Unless the DCM is being installed in its final, fixed location, QSC strongly recommends supporting the rear of the unit. Rear rack ears, required hardware, and a separate instruction sheet are available from QSC's Technical Services Group (part number FG-00003100). Attaching Rear Rack Ears Method 1 The DCM is first installed from the front of the rack and secured to the front rack rails. The rear ears are then secured to the DCM using two machine screws. The ears are secured to the rails using regular rack hardware. Method 2 The DCM is first installed from the front of the rack and secured to the front rack rails. [. . . ] · Verify connections from the DCM to the center channel amplifier. · Verify the Cinema Processor and center channel amplifier are ON and functioning. · Verify the center channel amplifier's Gain controls are set to a usable level. · Verify center channel amplifier speaker connections and speaker condition. [. . . ]