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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only. |
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22nd Jan 2022, 11:15 pm | #1 |
Pentode
Join Date: Nov 2016
Location: Lisbon, Portugal
Posts: 187
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Telefunken Compact 2080 - Advice needed
Dear all,
A few weeks ago I bought a Telefunken stereo Compact 2080 (unfortunately without original loudspeakers) and it needs to be repaired. Brief story, when I turned it on I was able to listen FM for half a minute in only one channel. The sound disappeared and that's it ... no smoke, no noise in all bands, lamps/bulbs on..., the typical almost undetectable hum from transformer (suggesting it is working properly).... I've been looking for a schematic for a while ... but no success The only diagram I was able to access is from https://berlin.museum-digital.de/sin...?imagenr=17146 , but unfortunately without enough resolution to see voltages values and component ratings. So, I was wondering if anyone can advise me where to start, since without a schematic it will be very difficult to detect where the problem is... At sight, the only thing I noticed was R136, R137, R236, R237 with a burned aspect. As I believe the source problem was not in the resistors themselves, but in other component, I would like to have your advise before start a replacement at sight process. Are transistors prone to fail? Thanks in advance for any kind of help anyone is open to provide. Best Regards from Portugal. Diniz from Portugal. |
23rd Jan 2022, 7:07 am | #2 |
Triode
Join Date: Jan 2005
Location: Michelstadt, Germany
Posts: 19
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Re: Telefunken Compact 2080 - Advice needed
Hi Diniz,
you can get a better schematic here: https://www.radiomuseum.org/r/telefu...2080r2080.html It is a little complicated, but you will do it. Greetings Werner |