Service manuals, schematics, eproms for electrical technicians

ELECTROHOME HFT-300 TUNER SCH

AUDIO - SERVICE MANUAL
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AUDIO
SERVICE MANUAL
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  • Also known:
    HFT-300 HFT300 TUNER HFT 300
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
STUDER Studiotechnika.
Sziasztok Szeretném tőletek megkérdezni hogy nem e jártas közületek valaki a studiotec.-ban. Hozzá jutottam egy szimmetrikus kimenetü géphez és szeretném összekötni az otthoni cuccal. Szakszerűen szeretném azért érdeklődöm. Üdv Kiss
IC keresztreferencia (katalógus)
üdv: nem tudom, jó helyen van-e itt. http://www.divdev.fsnet.co.uk/icxref2.htm Bálint
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.

 
Philips DFR 1600/00S Házimozi, teljesen néma Megoldva !
Üdv!

A címben említett holmi teljesen kuka.  Bekapcsolásnál sem hallani, hogy indulna előtte észrevehető volt.  A tápok rendben vannak, az ic-ken hiba szemmel nem látható. Mérni rettenetesen nehéz,teljesen ki kell üríteni a dobozból. Egyébként bekapcsol minden működik a scart-ra ad ki jelet, sőt az előerősítő fokozaton is ott a jel. A végfokot tiltja valamiért .  Ha valaki ismeri, találkozott a hibával, megköszönném a tapasztalatai megosztását. Köszönöm a figyelmet !

A  végpanelon eltűnt egy vékony fólia, kb 05 mmm széles volt.  Teljesen nyom nélkül, ezen keresztül kapták az ic-k a negatív táp egyik részét.  Mivel az 5 ic  bekötése teljesen egyforma volt, rajz nélkül nem látszott a különbség .  Köszönöm a segítséget !
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