Avoid running audio cables or placing audio equip- ment, close to thyristor dimmer units or power cables.
Noise immunity is improved significantly by the use of low impedance sources, such as good quality profes- sional microphones or the outputs from most modern audio equipment. Avoid cheaper high impedance mi- crophones, which may suffer from interference over long cable runs, even with
Fault Finding Guide Repairing a sound mixing console requires specialist skills, but basic Fault Finding is within the scope of any user if a few basic rules are followed.
∙Get to know the Block Diagram of your console (see inside rear cover)
∙Get to know what each component in the system is supposed to do.
∙Learn where to look for common trouble spots.
The Block Diagram is a representative sketch of all the components of the console, showing how they con- nect together and how the signal flows through the system. Once you have become familiar with the vari- ous component blocks you will find the Block Diagram quite easy to follow and you will have gained a valu- able understanding of the internal structure of the console.
Each Component has a specific function and only by getting to know what each part is supposed to do will you be able to tell if there is a genuine fault! Many ‘faults’ are the result of incorrect connection or control settings which may have been overlooked.
Basic Troubleshooting is a process of applying logical thought to the signal path through the console and tracking down the problem by elimination.
∙Swap input connections to check that the source is really present. Check both Mic and Line inputs.
∙Eliminate sections of the channel by using the insert point to
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