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General Repair Considerations
WARNING
The console should be repaired by qualified, professional, & experienced, audio technicians ONLY. Before beginning any type of repair or
opening the console CALL Arrakis customer support for recommendations.
DESIGNED FOR MODULAR PART REPLACEMENT
The ARC series console is designed for modular replacement rather than repair. The power supply is external and plug in. The rotary faders are plug in. Most ICs are plug in, and a physical board layout is provided
with descriptions of the functions of each IC. ICs can be individually replaced to test for functionality. A small amount of disassembly is required. Diagrams on the following pages explain the required disassembly.
PC BOARD COMPONENT LEVEL REPAIR
If possible, PC board component level repair requiring soldering should be performed at the factory. In particular, replacement of slide faders and switches should be performed at the factory. If the repair must
be made in the field, then extreme care must be taken to not damage the PC board or other components. Arrakis can not warranty non-factory service.
POWER SUPPLY
The power supply is a sealed module that must be replaced in whole if there is a problem.
REPEATED EQUIPMENT FAILURES
If a specific part of the console is failing regularly, it is likely that it is being subject to unusual stresses.
Examples are;
(1) Switch or fader failure-
(2) Mic channel IC failure-
(3) Input op amp failure-
(4) Output op amp failure-
(5) Power Supply failure-
SUGGESTED REPAIR PROCEDURES
(1) NO AUDIO OUT OF ONE INPUT CHANNEL- (Swap Cables) Be certain that the problem is in the console itself. If mic channel two doesn't function but mic channel one functions properly, then plug the cable from
the good mic into the channel that you suspect to be bad. If the channel that you suspect to be bad now functions, then the problem is external to the console and is in the source or the wiring. This is a very fast
and easy way to test your system.
(2) VU METERS MOVE BUT NO AUDIO OUT OF THE CONSOLE- The VU meters measure the actual output of the console itself. If the meters move but no audio is present, the problem is after the console output
and is in the following signal chain. Plug a set of headphones into the output of the console and listen to the Program output to confirm this.
(3) LOUD LOW FREQUENCY HUM IN AUDIO- Many years ago this would mean a power supply failure. In today's electronics, this is an installation problem such as a ground loop. To confirm the problem is not in
the console, remove ALL wiring from the console and connect a pair of headphones to the output you are testing. The hum should be absent. All wiring must be removed and headphones only used. A very common
problem is for an audio power amp and speakers to create the ground loop with the console.
(4) NO AUDIO OUT OF THE MONITORS- Be certain that the monitor system is not muted due to a mic channel being on or talkback being activated.
rough physical treatment
static discharge to mic
lightning, power surge, or other transient on this cable
lightning, power surge, or other transient on this cable
lightening, power surge, or other transient on the AC power line
1.6
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