Crown Amplifier Troubleshooting Guide for CTS 4200 and CTS 8200 Models

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CTs Multi-Channel Power Amplifiers

6 Troubleshooting

CONDITION: No sound, even though the amp has power. Power LED is on

without flashing and the amp is receiving an input signal. Signal indicator is flashing.

• Speakers not connected.

• Open circuit due to speaker failure.

• There is a short on the amplifier output. First disconnect your speakers from the affected channel(s) one by one to determine if one of the loads is shorted.

• DC or excessive low-frequency signal at the amplifier’s output has enabled speaker protection.

CONDITION: Thermal indicator is flashing.

POSSIBLE REASON:

•The amplifier has become too hot for safe operation. Check for loads less than 2 ohms, and for excessive input levels. Check for proper ventilation and proper mode-switch setting. Driving low- impedance loads while in high-voltage mode can cause overheating.

CONDITION: All channel thermal indicators are flashing.

POSSIBLE REASON:

•Power supply thermal overload.

CONDITION: No input signal.

(Signal indicator is not flashing even though audio is applied and channel is ready).

POSSIBLE REASON:

•Input signal level is very low.

•Input cables have become disconnected.

CONDITION: Bridge LED is flashing.

POSSIBLE REASON:

•The mode switch was switched while the power was on.

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Operation Manual

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Contents CTs Some models may be exported under the name AmcronImportant Safety Instructions CTs Series amplifiers require Class 2 output wiringOr has been dropped Family Name CTs Safety StandardEuropean Representatives Name and Address EMC StandardsSpecifications SetupTroubleshooting AC Power Draw and Thermal DissipationWelcome How to Use This ManualFeatures Proven Crown AB+B Multi-Modeoutput topologySetup Unpack Your Amplifier Install Your AmplifierCrown recommends using professionally constructed, high Choose Input Wire and ConnectorsChoose Output Wire and Connectors Over 60 ft 18.3 mWire Your System Dual 8/4 Mode Dual 70V ModeBridge-Mono 16/8 Mode Bridge-Mono 100V ModeStartup Procedure Connect to AC MainsPrecautions OperationSignal Indicator Front Panel Controls Indicators Bridge Mode IndicatorReady Indicator Clip IndicatorAccessory Panel Back Panel Controls Connectors AC Power Cord ConnectorOutput Connectors Input ConnectorsAdvanced Features Options Channel Level Control Attenuation in dBChoosing the Right Module Options Control ModulesWall-Mount level control panels for use with VCA module Input SensitivityTroubleshooting Refer to .1.6 for specific voltage requirementsThermal Level Control TLC is active Power supply thermal overload Mode switch was switched while the power was onSpecifications Dual ModePower Draw at Idle 120VAC mains, all channels in 70V mode Crosstalk below rated power, 20 Hz to 1 kHzCommon Mode Rejection CMR 20 Hz to 1 kHz Dimensions Width, Height, DepthCTs 8200 Typical Frequency Response 1 W CTs 8200 Typical Output Impedance vs. Frequency AC Power Draw Thermal Dissipation AC Power Draw and Thermal DissipationOhms Bridge 320x4 Service Warranty 12/01Worldwide Except USA & Canada CTs Multi-Channel Power Amplifiers Crown Factory Service Information Nature of ProblemThis page Intentionally Left Blank CTs Multi-Channel Power Amplifiers