Service manuals, schematics, eproms for electrical technicians


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Relevant AUDIO forum topics:
advice for repairing a DBX BX3 power amp (fused power transistor)
i have a very nice vintage DBX BX3 amp on which at least one channel fused.
power transistors literally burned down.

it is a very nice piece of hardware (4 channels with BTL capability 4x125W or 2x300W)
I would like to fix it myself. Having an electronic engineering degree, i think I should be able to undertake that venture but I never practiced (i've been in software for the last 40 years...)
So I need some guidance on the methodology to diagnose and track what went wrong.

I do have a scope, signal generator and I guess all required tools, as well as the schematics of the amp.
what I need is some help on locating the key parameters to measure and how to incrementally explore the different stages of the amp to find the faulty sections.

I guess I need to isolate the different sections of the amp but then, what ?

any help and advice will be highly appretiated.

KODA AV502 házimozi erősítő
Üdvözöllek benneteket! Adott egy KODA AV502 házimozi erősítő(Serial No.:4M150066)amelynek a koppanásgátló áramköre minden esetben ki-be kapcsolja a hangszórókat, ha a lakásban valamilyen fogyasztó be- vagy kikapcsolódik. Nem rendelkezem semminemű információval ezzel a készülékkel kapcsolatban. A segítségeteket kérem, ha van valakinek szervizinformációja a hibával kapcsolatban -vagy szervizdokumentáció az adott típusra azt megköszönném. Üdv. mpisti
ID Silvertone Radio
tried the number on the back right corner and the numbers on the tuning cap but can't seem to find the radio. Even tried looking on Ebay. Cleaned up all the switches and AM works great but can't get anything on FM. Tried a signal generator on FM and the radio I listen to picked it up but not the silvertone. Freaked out the cat with the tone Thanks in Advance everyone
Odakozmált NYÁK - újra gyártani az egészet, vagy..?
Üdv, Adott egy Castne CPA-600B -s erősítő, aminek az egyik oldalát 2 helyen sikerült elszenesítenie valakinek. A kérdés: az egész nyákot újra kéne tervezni/gyártani, vagy megoldható valami kisebb áthidalással szépen és jól? (gondolok itt pl kivágni a szenesebb részt, és a helyét kipótolni, vagy alulra v. felülre erősíteni javító-nyák-darabokat, vagy csak valahogy behuzalozni az oda való alkatrészeket.... ) Tudom, hogy az új nyák lenne az igazi, de mennyire fontos követelmény? Ki hogyan csinálná?
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