Realistic MPA-45 PA amplifier...not powering up.

orange

Veteran and General Yakker
Joined
Jul 6, 2010
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17,704
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Broken beyond repair but highly affable
#1
Here are a couple pictures of it attached, from the bottom of the PCB and inside.

I put what should be a good 2A fuse in as required and it doesn't look like it blew and the one joint I even wondered about was for a Mic jack I believe so I wonder if the power switch could be the problem? It doesn't light although I haven't connected anything to it to listen to it yet. The smell of magic smoke may be there but it's weak if so and I don't know about the transformers yet.

The post office workers that gave it to me (they got a new system) with a Realistic TM-150 tuner said the PA wouldn't power.

I have most everyting I wanted for it except the schematics or service manual from this link...

The semis are two D718 with a large resistor block on each I gather.

http://support.radioshack.com/support_audio/8724.htm
 

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orange

Veteran and General Yakker
Joined
Jul 6, 2010
Messages
17,704
Tagline
Broken beyond repair but highly affable
#3
I will, it's later down the queue from tapedecks and two receivers. As neat as it is, I don't have an immediate need for a PA amp. I started this to get back to it.
 
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