2. home-theater
  3. 1243947083

Lexicon MC-1; DC-1 Power supplies

Has anyone else had a power supply die in their Lexicon MC-1, or DC-1 or 2?

It's happened to me twice now. They use what appears to me to be a pretty cheap switching power supply. Lexicon won't service these units for less than $600 (though for that they do a complete refurb). I had my DC-1 repaired a couple of years ago by local reputable shop and it cost $200.

I love the units for home theater. They sound great and are very user friendly for setup and control, but wonder about the reliability.

Am I just unlucky?
bdgregory
taoist
5 posts
 

Mouser discontinued the DC 1 power supply production. If anybody needs a replacement board, it can be had from 

www.pyramid-audio.com

It was $70 plus shipping. If anyone is looking for a Lexicon power supply, I would check there first.

ervikingo
131 posts
 

Re: MC-1

My system has developed 60hz hum. I have traced it back to my MC-1.  Can I correct this with a power supply replacement?

The hum is present with no inputs connected to the MC-1; disconnect the interconnects to the power amps and hum is gone. Tried different interconnects but hum remains. 

I have tried HUM X but hum remains  

FYI Pyramid doesn’t sell parts; Mouser doesn’t have the power supplies  

suggestions are appreciated  

thanks!!! 

 

ervikingo
131 posts
 

Correction, Pyramid is selling me a PS!

ervikingo
131 posts
 

FYI, replaced the PS with one from Pyramid (same as factory part) hum is gone!

jimmyphelge
1 posts
 

Thanks @tadawson.

DC-1 crapped out and was presenting a blank screen on front (all lit up, no letters/symbols).  No response from any front buttons nor remote.

Replaced the power supply with an Artesyn LPT45 from Newark Electronics $55.77 + $10 shipping.  Newark part number 62K3453. Arrived in three days.

Back in business.  Replacing the board is exactly as @tadawson described.  Easiest with a phillip screwdriver with a magnet head on it.

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