Alesis DEQ230D manual Troubleshooting Index

Page 74

6 Troubleshooting

Troubleshooting Index

Symptoms No audio at outputs.

Weak output signal.

Clip LED lights often.

Can’t edit program, can’t select new program.

Numeric LED Display keeps flashing “Li.”

Numeric LED Display keeps flashing “Lo.”

Must de-select all bands in order to edit a single band.

DEQ230 won’t turn on/won’t go into Setup mode

DEQ230 won’t turn on/won’t re-initialize

Analog input is ignored

Digital input is ignored

Cause

No input audio.

Bad cables.

Destination is turned down.

Input level weak.

Output level weak.

(Decide which is the case by pressing the Bypass button.)

Input level too high.

Output level too high.

(Decide which is the case by pressing the Bypass button.)

DEQ230 is locked.

Channel B is linked to Channel A.

DEQ230 is locked.

Release Edit Group function set to Off.

Holding down buttons when turning on power

Holding down buttons when turning on power

Digital signal present at S/PDIF Input

Force Analog Input is set to Analog in Setup mode.

Solution Test with a known good input.

Replace the cables.

Check the connections and the level of the mixer or amp to which the DEQ230 is connected.

Increase level from source into DEQ230.

Boost channel levels of quiet program.

Boost Master Level in Setup mode.

Reduce input level at source.

Reduce gain of problem bands within program.

Reduce channel levels of that program.

Reduce Master Level in Setup mode.

Unlock DEQ230 in Setup mode. Refer to page 46.

Edit Channel A

Unlink the Channels to allow independent edits to Channel B.

Unlock DEQ230 in Setup mode. Refer to page 46.

Set Release Edit Group function to On in Setup mode.

Turn on power first, then hold down [STORE] button to enter Setup mode.

Turn on power first, then press [DOWN/UP] buttons to re-initialize.

Change Force Analog Input setting in Setup mode.

Ditto.

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Contents Reference Manual This page intentionally left blank Table Of Contents Chapter Four Applications Introduction WelcomeDEQ230D only DEQ230 Key FeaturesBypass button How to Use This Manual This page intentionally left blank Safety symbols used in this product Important Safety InstructionsImportant Safety Instructions English Please follow these precautions when using this productPage Symboles utilisés dans ce produit Instructions de Sécurité Importantes FrenchPage Sicherheit Symbole verwendet in diesem Produkt Lesen Sie bitte die folgende Sicherheitshinweise GermanPage CE Declaration Of Conformity FCC Compliance StatementThis page intentionally left blank Hook it up to a mixer Quick Start GuideIf you cant wait to get started Store the Program Play some signal into the unitTry some equalization Quick Start Guide Quick Start Guide Unpacking and Inspection Installing in a RackConnections Thermal Considerations in Rack MountingAC Power Hookup To use the DEQ230 in another countryConnecting Inputs and Outputs Unbalanced I/OMono connections Balanced I/OOperating Levels Stereo connectionsConnecting to the inserts on an instrument amplifier Connecting to equipment with XLR inputs and outputsDigital Signal In, Digital Signal Out Analog Signal In, Digital Signal OutDigital Signal In, Analog Signal Out About Audio Cables This page intentionally left blank What is equalization? Basics of EqualizationBasics of Equalization Description of the ControlsStore mode Program modeEdit mode Description of the Basic ModesChannel Level mode Bypass modeAudition mode Basic operation Program mode Band Solo Basic operation Edit modeSingle Band Edit Band Gain Cut/Boost Ranges LEDRelative Gain Display Multiple Band EditSelecting an Edit Group Proportional Gain MemoryBasics of Equalization Limits of Relative Gain Release Edit Group function Basic operation Store mode Channel Copy Basic operation Audition mode Audition Automation override Audition AutomationManual Audition Basic operation Channel Level mode Hidden Modes Demonstration modeReal-time Analysis mode DEQ230D only Metering modesSetup mode Item button Function Displayed Options Default ValueButton 1 Master Level +/- 6 dB Button 2 Release Edit Group On/OffButton 5 Lock On/Off Button 3 Audition Automation On/OffButton 4 Edit Time Out On/Off Button 7 Midi Program Change On/Off Buttons 6-12 DEQ230D onlyButton 6 Midi Channel ALL Button 8 System Exclusive Transmit Send?Button 11 Sample Rate Select 44.1/48 Button 9 System Exclusive Receive WaitingButton 10 Midi Out/Thru Select Out/Thru Button 12 Force Analog Input Auto/AnalogButton combinations Hold Press ResultNoise Equalization ArtifactsDistortion PhasingConstant Q vs. Variable Q What makes the DEQ230 unique?Variable Q Constant QMulti-band application and results Basics of Equalization Vocal Air ApplicationsRock Kick Drum Tape Hiss RemovalAnswering machine Filtering effectsEliminating Feedback Comb filtering This page intentionally left blank Program Charts Title DescriptionProgram Charts Some signals have 60Hz hum no matter what you do. This Untouched corner frequency is approximately 75Hz See note for program From magnetic media Place at the high end of the mix 11kHz for effect, bandlimiting it to half the sample rate Listeners attention Blank Store one of your programs here DEQ230 Settings Chart This page intentionally left blank Cleaning TroubleshootingCare and Maintenance Line Conditioners and ProtectorsTroubleshooting Troubleshooting IndexCustomers in the USA and Canada Obtaining Repair ServiceRefer All Servicing to Alesis Customers outside the USA and CanadaThis page intentionally left blank Audio Performance SpecificationsDEQ230 MechanicalThis page intentionally left blank Warranty / Contact Alesis Limited WarrantyAlesis Contact Information

DEQ230, DEQ230D specifications

The Alesis DEQ230 and DEQ230D are sophisticated digital equalizers designed for audio professionals seeking precision in sound control. Equipped with advanced features and innovative technologies, these units cater to a variety of applications, from live performances to studio recordings.

Both models include a powerful 31-band graphic equalizer, allowing users to sculpt their sound with incredible accuracy. The DEQ230 and DEQ230D offer extensive frequency coverage from 20 Hz to 20 kHz, ensuring that all audible frequencies are managed effectively. The 1/3-octave resolution facilitates fine adjustments, enabling sound engineers to target specific problem frequencies within the mix.

One of the notable characteristics of the DEQ230 series is its dual-channel operation. The DEQ230 provides individual equalization for two separate channels, making it an excellent choice for stereo setups or multi-channel applications. The DEQ230D takes this functionality even further by incorporating digital connectivity, allowing for seamless integration with digital audio systems and enhancing flexibility in various setups.

In terms of technology, the DEQ230 and DEQ230D utilize state-of-the-art digital signal processing (DSP) to deliver high-quality audio performance while minimizing latency. These models feature comprehensive output level control and provide precise metering through LED indicators, which allows sound engineers to monitor levels easily while adjusting the EQ settings.

Moreover, both equalizers come equipped with a variety of memory presets. This feature enables users to save and recall specific settings, streamlining the workflow during live events or studio sessions. The intuitive interface ensures ease of use, with clearly labeled controls that facilitate quick adjustments on the fly.

Alesis has also prioritized durability in the design of the DEQ230 and DEQ230D. The robust construction and rack-mountable chassis make them ideal for both touring and permanent installations. Additionally, the inclusion of balanced XLR and TRS inputs and outputs guarantees compatibility with professional audio gear while minimizing signal degradation.

Overall, the Alesis DEQ230 and DEQ230D represent valuable tools for any audio professional, offering precision, versatility, and robust performance in a compact design. Their combination of advanced features and user-friendly interface makes them an excellent investment for enhancing sound quality in any audio environment.