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 Post subject: Bradford Model 55160 Stereo Console--Service Manual Needed
PostPosted: Jul Thu 11, 2019 11:44 pm 
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Joined: Aug Sun 23, 2015 6:01 pm
Posts: 994
Location: South Jersey East of Philly
Customer brought in a Bradford (IIRC, W.T. Grants) stereo console, model #55160. It's from about '67. No sound from one channel on any function, speakers OK. There is a schematic pasted in the bottom of the cabinet (not the easiest place to read it and have to keep referring to it)...but it is solid state and the components are shoehorned into a 'box' shaped chassis, so there's no room to troubleshoot. I might be able to get a little further if I can get the Sam's folder with the component layout, as I have no way to know where the specific components are located on the board...eg--C203, Q202..etc.
Just checking if anyone has access to a Sam's with this model, that has the board component layout.
The chassis also has the number SL196 on it.


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 Post subject: Re: Bradford Model 55160 Stereo Console--Service Manual Need
PostPosted: Jul Fri 12, 2019 1:42 am 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 10146
Location: Mountains of Mourne. Ireland.
Take a photo of the schematic using the macro setting on a digital camera.
I don't know who manufactured your stereo for Grants - - no "hits" for those numbers!

Is there a small crossover board (with NP capacitors)?
viewtopic.php?p=2880273#p2880273

Greg.


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 Post subject: Re: Bradford Model 55160 Stereo Console--Service Manual Need
PostPosted: Jul Fri 12, 2019 2:15 am 
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Joined: Aug Sun 23, 2015 6:01 pm
Posts: 994
Location: South Jersey East of Philly
No crossover Greg. Thanks for the tip on schematic...simple, but good.
I think the big problem is the inaccessibility of the components, aside from needing the component's exact schematic location. No way I can even get to many if them. I can see wrong (too low) voltages of the two o/p transistors and driver (which I can get to) on the bad side...but to trace back from there is near impossible with the tuner component's in an enclosed box mounted just above the output components.
No warm transistors or obvious fried stuff.


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 Post subject: Re: Bradford Model 55160 Stereo Console--Service Manual Need
PostPosted: Jul Fri 12, 2019 5:40 am 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 10146
Location: Mountains of Mourne. Ireland.
How many transistors are in your console?

Greg.


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 Post subject: Re: Bradford Model 55160 Stereo Console--Service Manual Need
PostPosted: Jul Fri 12, 2019 6:31 am 
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Joined: Aug Sun 23, 2015 6:01 pm
Posts: 994
Location: South Jersey East of Philly
Twenty.


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