User manual QSC AUDIO DCM 10 DIGITAL CINEMA MONITOR

[. . . ] DCM Series Digital Cinema Monitor & Crossover System User Manual DCM 10 DCM 10D DCM 30 DCM 30D *TD-000265-00* TD-000265-00-A Important Safety Instructions & Explanation of symbols 1- Read these instructions. Installation of the equipment in a rack should be such that the amount of air flow required for safe operation of the equipment is not compromised. 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. [. . . ] The DCM Manger software may then be used to continue the update procedure (refer to the software help file for details). Hardware Description (continued) BYPASS CROSSOVER MODE Switch: The BYPASS CROSSOVER MODE switch routes the center channel input signal through the 2-way or 3-way bypass crossover on the DCM 30/30D. On the DCM 10/10D, the center channel is routed through the 2-way bypass crossover or not processed at all (passive bypass). Bypass Crossover Level Adjustment Potentiometers: These are used to adjust the characteristic of the Bypass crossover. The frequency-specific levels of the crossover outputs from the DCM to the center channel amplifiers can be adjusted to suit the center channel loudspeakers. This signal path is only active if the front panel bypass switch is in the BYPASS position. DCM 10/10D DCM 30/30D DCM 10/10D DCM 30/30D Barrier Strip Screw Terminals: The barrier strip screw terminals provide connections for output to an external monitor loudspeaker, subwoofer, alternate equalization switching, auxiliary input, and hearing impaired audio output. EXTERNAL SPKR: These terminals provide the identical audio supplied to the front panel's monitor loudspeaker. If using an external monitor loudspeaker, remover the jumper between the EXTERNAL SPKR + and IN SPR terminals. Any external loudspeaker used must have a minimum impedance of 4 ohms. The DCM's internal monitor amplifier has a maximum output of 15 watts. IN SPR: This terminal is connected to the EXTERNAL SPKR + terminal if using only the DCM's internal monitor loudspeaker. If using an external monitor loudspeaker, remove the jumper that connects the IN SPR terminal to the EXTERNAL SPKR + terminal. This connection cannot be monitored or include any of the Fault Analysis functions because there are no signal return connections. ALT EQ SELECT is a contact closure input used to activate an alternate equalization which has been created using the DCM Manager sofware. A switch or set of relay contacts may be used to activate/deactivate the alternate equalization settings. When the contacts are closed, the front panel ALT EQ indicator illuminates. AUX INPUT is a single mono audio input that can be used to supply an additional channel for a ceiling speaker or other application. The aux channel can be processed as a 1-way channel and output to both channels of DataPort O or processed as a 2-way output , with low band and high band going to channels 1 and 2 of DataPort O, respectively. If the Aux INPUT is not being used, DataPort O can be assigned as an additional Left Surround/ Right Surround Output, Back Left Surround/Back Right Surround Output, or as a bass-managed mix of all surround channels (duplicated to both DataPort O channels). HEAR IMP OUT is a single mono audio output which contains a mix of the left, center, and right signals with the center signal boosted 6 dB. This is usually connected to a special cinema system which supplies headphone audio feeds for people with hearing difficulties. This can also be used as an input signal to a powered loudspeaker for remote monitoring of basic L/C/R signals in larger projection booths. The DCM uses a switching power supply that accepts 100 to 240 volts AC, 47-440 Hz. Mounting Rack Mounting When rack mounting the DCM, secure the DCM to the rack rails using four machine screws and washers of the proper size. [. . . ] These gain settings compensate for driver sensitivity differences, so all the high and low (or high, mid, low) gains should remain the same number of dB apart (compared to their factory setting). -Amplifier input sensitivity adjustment: Refer to amplifier owner's manual. If switching the BYPASS to EMERGENCY does not restore sound to the center channel. . . · Verify the DCM is receiving input signals from the Cinema Processor. [. . . ]