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21st October 2011, 11:10 AM
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#1 |
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diyAudio Member
Join Date: Mar 2004
Location: Krakow
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is Technics SU-V50 worth repairing...
... or should I use its parts for example Krill
 I bought it failured, but visual mint  for now R436, 438 and T411 are burned, I do not know if other parts are OK  Does anybody hear this amp and recommend its sound?  Please indicate what might be the purpose of burned parts?
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regards, Pawel Last edited by padamiecki; 21st October 2011 at 11:16 AM. |
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21st October 2011, 11:13 AM
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#2 |
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diyAudio Member
Join Date: Mar 2004
Location: Krakow
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here goes the schematic
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regards, Pawel |
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21st October 2011, 12:42 PM
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#3 | |
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diyAudio Member
Join Date: Mar 2004
Location: Krakow
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Quote:
R439 and Q415 are burned, this time R435 survived...
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regards, Pawel Last edited by padamiecki; 21st October 2011 at 12:43 PM. Reason: gramma |
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21st October 2011, 01:54 PM
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#4 |
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diyAudio Member
Join Date: Jan 2004
Location: n.e england
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It's probably not worth repairing. The module with "class AA" written on it would cost much more than the amplifier is worth. That's if it's even available.
I could be wrong on this but I was given a Technics amp for spares about 12 years ago and I thought about repairing it.... then I got a quote of about £72 for the module!! It was only a low model in the range as well, about 30WPC.
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Repairs and mods to Real Hi-Fi, guitar amps and P.A. in North East England. http://www.arklesselectronics.com |
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21st October 2011, 03:35 PM
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#6 | |
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diyAudio Member
Join Date: Mar 2004
Location: Krakow
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Quote:
 anyway thanks
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regards, Pawel |
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21st October 2011, 03:37 PM
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#7 | |
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diyAudio Member
Join Date: Mar 2004
Location: Krakow
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Quote:
it would be hard to mount discrete transistors to the radiator which is set for the power module... 
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regards, Pawel |
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24th October 2011, 11:05 AM
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#8 |
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diyAudio Member
Join Date: Mar 2004
Location: Krakow
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Hi
(if anyone interested...?) I found that AN7062 is broken I ordered new one and will inform if works after soldering.
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regards, Pawel |
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25th October 2011, 12:11 PM
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#9 |
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diyAudio Member
Join Date: Mar 2004
Location: Krakow
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AN7062 bought and soldered!
Changed burned resistors and transistors...
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regards, Pawel |
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25th October 2011, 12:19 PM
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#10 |
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diyAudio Member
Join Date: Mar 2004
Location: Krakow
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R436 burned with fireworks!  I am starting to thinking what amplifier to build inside V50... The important thing is a power transformer, has lower and higher voltage taps - the preamp/voltage section might be powered with higher voltage, power section with lower...
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regards, Pawel |
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