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| Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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26th Apr 2016, 12:17 pm
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#1 |
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Retired Dormant Member
Join Date: Oct 2014
Location: London, UK.
Posts: 324
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KA7020 Kenwwod amp schematic please
this unit is producing a low distorted output via both channels
anyone have experience with this model ? |
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26th Apr 2016, 12:25 pm
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#2 |
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Heptode
Join Date: Aug 2004
Location: Woodbridge, Suffolk, UK.
Posts: 501
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Re: KA7020 Kenwwod amp schematic please
Hya, Hi Fi engine is your best bet, there is one on there.
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26th Apr 2016, 2:23 pm
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#3 |
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Retired Dormant Member
Join Date: Oct 2014
Location: London, UK.
Posts: 324
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Re: KA7020 Kenwwod amp schematic please
thanks Stuart
not the easiest schematics to follow,but seem to be missing the plus/minus 20 volt supplies to the volume board voltage does arrive at the front control board,which i suspect is where the problem lies |
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26th Apr 2016, 3:16 pm
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#4 |
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Retired Dormant Member
Join Date: Oct 2014
Location: London, UK.
Posts: 324
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Re: KA7020 Kenwwod amp schematic please
discovered a break on pins of cable,from volume board to front ( pins 1 & 2 ),which are the plus/minus 20 volt lines.
they had broken at the volume board side of cable what are the chance of that ? anyway,all working again 
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26th Apr 2016, 4:55 pm
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#5 |
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Heptode
Join Date: Aug 2004
Location: Woodbridge, Suffolk, UK.
Posts: 501
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Re: KA7020 Kenwwod amp schematic please
It's a nice feeling when you work out the problem, glad it's sorted.
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27th Apr 2016, 10:14 am
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#6 |
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Retired Dormant Member
Join Date: Oct 2014
Location: London, UK.
Posts: 324
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Re: KA7020 Kenwwod amp schematic please
cheers Stuart,yes,after all the years repairing electronic equipment,i still get a buzz when chasing down a challenging problem
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