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 Post subject: Zenith Royal 12c diagram
PostPosted: Feb Thu 08, 2018 7:53 pm 
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Joined: Dec Tue 08, 2015 12:53 am
Posts: 323
Location: shirley NY...Long Island
Hi..is there anyone who has this diagram...it would help me out alot...
Zenith Royal 12C
Thanks..


Kenny KE4HVE


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 Post subject: Re: Zenith Royal 12c diagram
PostPosted: Feb Fri 09, 2018 1:43 am 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 4730
Location: Mountains of Mourne. Ireland.
Service data for Zenith Royal 12C1 (Hong Kong) was published in Sams TSM-89

Image

Image

ebay $7.99 +free postage is an OK price... :)
https://www.ebay.com/sch/i.html?_from=R ... 2&_sacat=0

Greg.


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 Post subject: Re: Zenith Royal 12c diagram
PostPosted: Feb Fri 09, 2018 6:06 am 
Member

Joined: Dec Tue 08, 2015 12:53 am
Posts: 323
Location: shirley NY...Long Island
HI.all I have no idea about this radio...I have worked on many many radios but this one got me...I worked on it for about an hour, and could not get anything...all of a sudden I seen 2 capacitors where the + side of the caps went to the Negative side of the battery....I have never seen this. I found this because I was recapping the radio...the last two caps was the 2 that went to the NEGATIVE side of the battery terminal, and it seems like the ground of the radio also.... So I installed the batteries backwards and the radio made a click..and a very faint signal came thru...I went thru with the recapping...and found 1 resistor bad or out of spec...and as of now it works with the batteries backward..
If the batteries are installed the right way it will not make a sound, nada..

Has anyone seen this before....

That is the reason I needed the diagram...

Kenny


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 Post subject: Re: Zenith Royal 12c diagram
PostPosted: Feb Fri 09, 2018 2:51 pm 
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Joined: Nov Wed 14, 2007 11:37 pm
Posts: 1469
Please don't run that radio with the batteries reversed. You will probably damage the transistors. The old zeniths had positive ground with the pnp germanium transistors. PM me. I will get you the service data.


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