Hopefully will be a simple repair. They are a very good looking pre-power combo.
Drunken Administrator
Location: Staffordshire, England
Posts: 43,329
I'm Martin.
Hopefully will be a simple repair. They are a very good looking pre-power combo.
Current Lash Up:
TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > Troels Gravesen Faital 3WC-15.
Senior Member
Location: Glasgowshire
Posts: 10,638
I'm Gary.
Thanks Man.
Ok with not having it on Betamax nowadays
Senior Member
Location: Glasgowshire
Posts: 10,638
I'm Gary.
Initial report back from repair:
“Both Output Relays not engaging.”
Looking for schematic/ Service manual now.
Ok with not having it on Betamax nowadays
Super Moderator
Location: W Lothian
Posts: 98,920
I'm Grant.
lots of potential issues with relays alas.. some are sealed as well which leaves only electrical cleaning..or replacement
Regards,
Grant.... ؠ ......Don't be such a big girl's blouse
I've said it before and I'll say it again: democracy simply-doesn't-work.... ..... ...... ...... ................... ..... ..... ..... ..... .....
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Oh my god! There's nothing wrong with the bidet is there?
“Nothing discloses real character like the use of power. It is easy for the weak to be gentle. Most people can bear adversity. But if you wish to know what a man really is, give him power. This is the supreme test. It is the glory of Lincoln that, having almost absolute power, he never abused it, except on the side of mercy".
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"You don't have free will. You have the appearance of free will.”
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Senior Member
Location: Glasgowshire
Posts: 10,638
I'm Gary.
My amp circuit design knowledge is non existent Grant, so glad somebody smarter than me is looking after it.
But always good to have at least a little knowledge.
Reached out to Densen for Service Mnual/ Schematic as well as on DiyAudio, so see what comes back.
But still...BUMMER!
Ok with not having it on Betamax nowadays
Moderator & Terminator!
Location: N E Kent
Posts: 51,610
I'm Geoff.
Hopefully that will be all that's wrong. Annoying, but not the end of the world.
It is impossible for anything digital to sound analogue, because it isn't analogue!
Don McCorleone
Location: Galashiels
Posts: 14,031
I'm inthescottishmafia.
Yes, hopefully an easy fix. Nice looking combo mate. :-)
“Music has always been a matter of energy to me, a question of fuel. Sentimental people call it inspiration, but what they really mean is fuel. I have always needed fuel. I am a serious consumer. On some nights I still believe that a car with the gas needle on empty can run about fifty more miles if you have the right music very loud on the radio”
Hunter S Thompson
Senior Member
Location: Glasgowshire
Posts: 10,638
I'm Gary.
Aye,
see how it plays out.
Ok with not having it on Betamax nowadays
Senior Member
Location: The Black Country
Posts: 6,257
I'm Alan.
Not necessary an easy fix unfortunately, sorry to say Gaz.
If the output relays aren't 'engaging' it could be that the protection circuit is detecting a fault and keeping the relays open.
Possible faults are blown output transistors or faulty psu on one rail.
I hope your 'tech' is sufficiently experienced to work it out, it can be a challenge without a circuit diagram but many amps have similar topography.
Hope it works out OK.
Drunken Administrator
Location: Staffordshire, England
Posts: 43,329
I'm Martin.
Densen should be able to supply a schematic. I e-mailed Krell for one for the KSA50S, didn't hold out much hope as they hadn't made them in 25 years and they'd changed hands since. Took them just 40 minutes to reply with it.
Current Lash Up:
TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > Troels Gravesen Faital 3WC-15.
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