Crown Audio Troubleshooting Tips for Amplifiers
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Commercial Audio Series Mixers

3 Troubleshooting

CONDITION: No power to the mixer.

POSSIBLE REASON:

•The mixer’s Power switch is off.

•The mixer is not plugged into the power receptacle.

•The mixer’s high-voltage power supply circuit fuse has opened. Verify that the AC mains voltage is correct, then press the Reset button on the back panel.

•If the unit is operated from a 24V DC supply, the internal fuse may have opened. (The power switch has no effect on 24V operation.)

CONDITION: Distorted sound.

POSSIBLE REASON:

•Input signal level is too high. Turn down your input volume controls. NOTE: Your mixer should never be operated at a level which causes the Clip LEDS to illuminate constantly.

•Master volume level is too high. Turn it down to about 3/4 of maximum level.

CONDITION: No sound.

POSSIBLE REASON:

•Check the fuse and replace if necessary, or return mixer to Crown or an authorized Crown Service Center for servicing.

•No input signal.

•Input signal level is very low.

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Operation Manual

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Contents Commercial Audio Series Some models may be exported under the name AmcronImportant Safety Instructions Watch for These SymbolsCrown International, Inc Safety StandardDeclaration of Conformity European Representative’s Name and AddressTable of Contents Features WelcomeOutput Signal Presence Indicator Input Volume ControlsOutput Volume Controls Clip IndicatorMic/line Switch Back Panel Controls and Connectors AC Power InletMixer Config Switch Dual RCA Input ConnectorHow to Attach Rack Ears SetupInstallation Locate the two rack ears suppliedBalanced Line Outputs Maintain proper polarity +/- on output connectors WireYour SystemTypical input and output wiring is shown in Figure Priority Muting Phantom PowerInput Routing Powering Up Included AccessoriesBlock Diagram 28M Block DiagramTroubleshooting No input signal Input signal level is very lowSpecifications Service Warranty United States & CanadaItems Excluded from this CROWN- Warranty Worldwide Except USA & CanadaFax Model Serial #Crown Audio, Inc Mishawaka RdThis page Intentionally Left Blank Crown Audio Factory Service Information Product Return InformationCommercial Audio Series Mixers Commercial Audio Series Mixers
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