User manual CROWN 135MA

[. . . ] Commercial Audio Series 135MA Operation Manual 160MA Obtaining Other Language Versions: To obtain information in another language about the use of this product, please contact your local Crown Distributor. If you need assistance locating your local distributor, please contact Crown at 574-294-8000. This manual does not include all of the details of design, production, or variations of the equipment. Nor does it cover every possible situation which may arise during installation, operation or maintenance. [. . . ] Plug the amplifier's power cord into a 3-wire grounded AC outlet. Turn the input volume controls in use about 3/4 up. Turn up the master volume control(s) until the desired loudness or power level is achieved. Touch up the input levels as needed for music and voice. Turn on any equipment connected to the Preamp Output connector. If you ever need to make any wiring or installation changes, disconnect the power cord. 3. 2 Priority Muting If you want a microphone's push-to-talk switch to mute the background music or other input signals, follow this procedure. Connect a push-to-talk mic contact to the Priority Connector (Figure 3. 1). Input 1 is the priority input for the amplified output, so Input 1 mutes the other inputs. 3. 3 Voice-Activated (VOX) Muting If you want a voice to mute the background music or other input signals, follow this procedure. Adjust the VOX Threshold trim pot on the back of the unit to set how loud the voice must be before muting occurs. 3. 4 Music-On-Hold On the back of the unit, adjust MOH Level Control to obtain the desired level of Music-OnHold in your phone system. 3. 5 Security Knobs To prevent user tampering with the knobs, you can order the accessory 10-pack of security knobs from your Crown dealer, part no. Screw the security knob over the potentiometer shaft. The knob will not rotate. Input 1 PRIORITY Mic push-to-talk switch Figure 3. 1 Priority Muting Controls and Connectors page 12 Operation Manual Commercial Audio Series Mixer-Amplifiers 4 Troubleshooting CONDITION: No power to the mixer-amplifier. POSSIBLE REASON: · The mixer-amplifier's Power switch is off. · The mixer-amplifier is not plugged into the power receptacle. · The mixer-amplifier's high-voltage power supply circuit breaker has tripped. Verify that the AC mains voltage is correct. CONDITION: No sound. POSSIBLE REASON: · The amplifier is in "fault" mode. A Fault status can be triggered when one of the amplifier's protection circuits is activated. First disconnect your speakers from the affected channel(s) one by one to determine if one of the loads is shorted. [. . . ] WARRANTY ALTERATIONS No person has the authority to enlarge, amend, or modify this Crown Warranty. This Crown Warranty is not extended by the length of time which you are deprived of the use of the new Crown product. Repairs and replacement parts provided under the terms of this Crown Warranty shall carry only the unexpired portion of this Crown Warranty. DESIGN CHANGES We reserve the right to change the design of any product from time to time without notice and with no obligation to make corresponding changes in products previously manufactured. [. . . ]