Spirit FOLIO SX mixer User Manual download pdf (Page 9)

Page 8

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.

l Get to know the Block Diagram of your console (see page 29).

l Get to know what each component in the system is supposed to do.

l 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 connect together and how the signal flows through the system. Once

you have become familiar with the various component blocks you will find the Block

Diagram quite easy to follow and you will have gained a valuable 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.

l Swap input connections to check that the source is really present. Check both Mic

and Line inputs.

l Eliminate sections of the channel by using the insert point to re-route the signal to

other inputs that are known to be working.

l Route channels to different outputs or to auxiliary sends to identify problems on the

Master section.

l Compare a suspect channel with an adjacent channel which has been set up

identically. Use PFL and AFL to monitor the signal in each section.

Insert contact problems may be checked by using a dummy jack with tip and ring

shorted together as shown below. If the signal appears when the jack is inserted it

shows that there is a problem with the normalling contacts on the jack socket, caused by

wear or damage, or often just dirt or dust. Keep a few in your gig tool box.

Dummy Insert Bypass Jack

Wire Link

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Spirit FOLIO SX mixer User Manual Page 9