User manual QSC AUDIO DCM 30
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QSC AUDIO DCM-30 DATASHEET 09-18-08 (189 ko)
Manual abstract: user guide QSC AUDIO DCM 30
Detailed instructions for use are in the User's Guide.
[. . . ] If the provided plug does not fit your outlet, consult an electrician for the replacement of the obsolete outlet. 10- Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit the apparatus. 12- Use only with carts, stands, tripods, brackets, interconnecting cables, or software specified by QSC Audio Products. When moving or transporting using a cart, use caution to avoid injury from tip-over. [. . . ] If the switch is in the DIGITAL position, input is from the DIGITAL INPUT. MAIN ANALOG INPUT: Connect this to the cinema processor's output. This is the input source of all film sound into the DCM unit if the INPUT SELECT switch is set to the ANALOG position. The 25-pin connector is an industry standard type and pinout; cables are available from cinema supply houses.
SURROUND EX INPUT (OPTION CARD): This input provides additional inputs when using a Dolby CP650 with the Cat. 790 or Cat. 791 option cards. The surround, backwall surround, and left extra/right extra channels are input through this connector. The INPUT SELECT switch must be set to ANALOG in order to use this connection. DIGITAL INPUT: If using a Dolby CP650 with Cat. 778 option, connect the CP650 digital output to this connector. Communication between the DCM Manager software (running on the host PC) and the DCM is routed throught this connection. Firmware Update Mode Select: This recessed push button switch is located directly left of the USB port. To place the DCM in firmware update mode, press inward and hold the switch in the depressed position while turning the AC POWER switch on. Use a small tool, such as the end of a paperclip wire or similar object to depress the switch. Most US rack equipment accepts #10-32 machines screws; length used depends upon application. 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
Supporting the Rear of the DCM When shipping completed sound racks, 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-000031-00). 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 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. Temporarily secure the rear ears to the rear rack rails and select the appropriate mounting position for the "pin". Use of thread-locking is recommended for high-vibration installations.
Software Description
DCM Manager Windows Software To access the functions of the DCM hardware, you must use QSC's DCM Manager 2007 control software. One of the computer's available USB ports provides communications between the DCM Manager software and the DCM hardware. The PC must meet the minimum System Requirements as outlined in the Introduction section of this manual. [. . . ] See if the Speaker settings pages show any channels muted; correct any settings as required. Check the configuration for proper signal routing.
Troubleshooting (continued)
If theater audio is distorted . . . ·If any of the amplifier CLIP warning LEDs are illuminating, the output level of the DCM must be reduced or amplifier input sensitivity must be reduced. Determine which channel's amplifier is clipping and make the necessary gain adjustments. [. . . ]
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