UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Sony KV-1320UB trips red cutout switch

Studio263 · 25th Apr 2019, 2:54 pm

If its a MkII then the bits you are interested in are the same as the KV-1310UB and KV-1330UB. I've written loads on this forum about how to deal with these, it is not easy!

You'll probably find that some or all of these transistors have failed:

Chopper, Line Output, Converter, EW Output, Frame Output (x2).

They are all Sony specials and difficult to substitute. There will be a reason why they have failed too, it you don't find it you will be back to where you started as soon as you switch on. This isn't a set for the beginner or the capacitor monkey, it needs careful thinking about and a logical, step by step approach.

Read this first:

https://www.vintage-radio.net/forum/...d.php?t=151193

and this:

https://www.vintage-radio.net/forum/...d.php?p=917920

(scroll back up to the top)

If it were me I'd test the tube first. If it is good, put it in one of the many still-working examples and save a lot of time and grief. If it isn't, you are wasting your time anyway, the set is only good for parts (excluding whatever has already failed of course).

25th Apr 2019, 2:54 pm	#5
Studio263 Octode Join Date: Apr 2007 Location: Hampshire, UK. Posts: 1,577	Re: Sony KV-1320UB trips red cutout switch If its a MkII then the bits you are interested in are the same as the KV-1310UB and KV-1330UB. I've written loads on this forum about how to deal with these, it is not easy! You'll probably find that some or all of these transistors have failed: Chopper, Line Output, Converter, EW Output, Frame Output (x2). They are all Sony specials and difficult to substitute. There will be a reason why they have failed too, it you don't find it you will be back to where you started as soon as you switch on. This isn't a set for the beginner or the capacitor monkey, it needs careful thinking about and a logical, step by step approach. Read this first: https://www.vintage-radio.net/forum/...d.php?t=151193 and this: https://www.vintage-radio.net/forum/...d.php?p=917920 (scroll back up to the top) If it were me I'd test the tube first. If it is good, put it in one of the many still-working examples and save a lot of time and grief. If it isn't, you are wasting your time anyway, the set is only good for parts (excluding whatever has already failed of course).