Question about M&S Systems Local Audio Input Module - Xtreme Digital Music System Shelf System
I bet your unit is about 4 years old...
I have installed 4 of these systems 4 years ago and each is failing at about the 4 year mark (3 so far).
The flashing volume lights are a communication error, meaning the keypads are not communicating with the controller. If all of the keypads are doing the same thing and your have checked your cables then the problem is with the controller. I would unplug the unit for a few days and see if that helps.
It appears the units work consistently and reliably for about 4 years however in my case 75% have failed at the 4 year mark.
Fortunately I have a meter and oscilloscope and determined why they are failing. The main power supply unit that feed power to the 5VDC regulator is failing.
It is not clear whether M&S replacement units have addressed this problem or not. Therefore, to fix the problem for my customers, I added and additional small power supply (fits inside the case) and injected the signal on the input side of the 5VDC regulator. My solution hopefully will not expire after 4 years.
It appears to me from my small sample size that M&S may have a flaw in their original engineering and replacing it with the same will guarantee future failure.
I hope this helps others. :)
Posted on Apr 01, 2010
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From the link...
PROTECT, PROTECTOR or the letter P is flashing in the display of the Audio/Video (A/V) receiver.
If PROTECT , PROTECTOR or a P is flashing in the display of the A/V receiver, there may be an incorrect connection or an improper setting. Try following these steps to resolve this issue:
IMPORTANT: If model-specific information is needed to complete any of these steps, refer to the instructions supplied with the product. Manuals are available online through the Manuals/Specs/Warranty link on this page.
NOTE: Because each of these steps represents a possible solution to this issue, check the A/V receiver status after completing each step.
Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.
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