UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

space_charged · 11th Jul 2019, 6:39 pm

Interesting. The data I've got on 2sd625 gives its hfe as 120 which is on the low side for a darlington but high for a strait power transistor.

I have also already tried a high gain single transistor as a replacement. I used a KSC5027OTU. This functions to some extent, but not enough to produce a picture. It shows symptoms of lack of drive really. It also gets hot, which is reasonable if its not saturating when on.

I have the service data on this set but only from the radio and Television books. If you have a better service sheet for it I'd love a copy.

Chas

11th Jul 2019, 6:39 pm	#8
space_charged Hexode Join Date: Dec 2014 Location: West Midlands, UK. Posts: 315	Re: Sony 2SD625 line output transistor Interesting. The data I've got on 2sd625 gives its hfe as 120 which is on the low side for a darlington but high for a strait power transistor. I have also already tried a high gain single transistor as a replacement. I used a KSC5027OTU. This functions to some extent, but not enough to produce a picture. It shows symptoms of lack of drive really. It also gets hot, which is reasonable if its not saturating when on. I have the service data on this set but only from the radio and Television books. If you have a better service sheet for it I'd love a copy. Chas