RCA B&W tv schematic

[andrefranc]

I have a small B&W rca tv and I need the diagram for it. Only part of the model number is readable and it is 8-PT-7... and that's all I can read of it. Anyone have a diagram? thanks, John

[Eric H]

Hi John, that will be an 8-PT-703* or 8-PT-701*depending on the color and style

There are a couple different chassis used in these sets, I have a basic schematic for one of them uploaded here:

Right click and "save as"

http://www.vintagetvsets.com/schem/kcs100.pdf

I think the difference is in the vertical circuit so check and see if this matches yours.

You can DL the owners manual also: http://www.vintagetvsets.com/schem/personalportable.pdf

[andrefranc]

Thanks to Eric for the schematic. My set uses a 6CG7 in the vertical and also for the horizontal osc. I don't have one of these tubes in stock but when I swapped them I still had the horizontal way off frequency. Any suggestions as to what is the likely cause? Thanks in advance. John Graber

[dieseljeep]

The first capacitor to change would be c167 across l155, sine wave coil. It's a .01 mfd @ 600 volts. Then see if the horizontal will sync. in. Of course, the set's going to need a complete recap. The set's a real hotbox and they needed a recap real early in their life.

[andrefranc]

Thanks to Dieseljeep. C167 did it. Works now.