UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Sony SL-C7 Rebuild: Alive for 20 Seconds Then ‘POP” & Smoke

P-Sussex · 17th Jan 2021, 10:32 am

On the C7 which blew, a 15 ohm 0.25w resister was soldered crudely across the base and the emitter of the pair of '2SC2335'. The other machine which I am using for spare parts and reference does not have this resister attached. Should I be soldering a resister across the base and emitter? The service manual makes no reference to this. From my limited understanding is this a hack to help maintain the transistors life?

Here is a photo before, I began any work, showing the resister attached cover by heat protectors

17th Jan 2021, 10:32 am	#10
P-Sussex Triode Join Date: Dec 2020 Location: Horsham, West Sussex, UK. Posts: 17	Re: Sony SL-C7 Rebuild: Alive for 20 Seconds Then ‘POP” & Smoke On the C7 which blew, a 15 ohm 0.25w resister was soldered crudely across the base and the emitter of the pair of '2SC2335'. The other machine which I am using for spare parts and reference does not have this resister attached. Should I be soldering a resister across the base and emitter? The service manual makes no reference to this. From my limited understanding is this a hack to help maintain the transistors life? Here is a photo before, I began any work, showing the resister attached cover by heat protectors Attached Thumbnails Last edited by P-Sussex; 17th Jan 2021 at 10:39 am.