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SPA-400 intercom

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citabriapilot(at)comcast.
Guest

Posted: Sun Jun 10, 2007 6:46 pm Post subject: SPA-400 intercom

I have fried several resistors/diodes (don't ask, lets just say the  

previous professional approved installation choice of protection had  

something to do with it) in the unit to the point I can not tell what  

they are or their values. There is a cluster of 4 passives, a diode,  

capacitor, ? and ? located just behind the on/off switch on the  

board.  Anyone out there have access to a schematic or and old unit  

to help me determine what they are. They will be easy to replace and  

repair the unit.

Thanks

Bob

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douglist(at)macnauchtan.c
Guest

Posted: Sun Jun 10, 2007 7:43 pm Post subject: SPA-400 intercom

At 22:43 -0400 6/10/07, Bob Vandegrift wrote:

 	  Quote: 	
		  	I have fried several resistors/diodes (don't ask, lets just say the  previous professional approved installation choice of protection had  something to do with it) in the unit to the point I can not tell what  they are or their values. There is a cluster of 4 passives, a diode,  capacitor, ? and ? located just behind the on/off switch on the  board.  Anyone out there have access to a schematic or and old unit  to help me determine what they are. They will be easy to replace and  repair the unit.

Thanks

Bob


	




 I have a schematic and installation sheet for a Sigtronics SPA-400. It's pretty old - earlier than 1885 or so.



I'll see if I can scan it in the morning but it's not going to be a work of art.



There is no parts layout drawing in the stack. If you can identify some part numbers on the PC board I might be able to come up with values.



-- 

-->  The best programming tool is a soldering iron <--

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