Service manuals, schematics, eproms for electrical technicians

PHILCO 20

AUDIO - SERVICE MANUAL
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AUDIO
SERVICE MANUAL
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    PHILCO 20
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
BEAG APT100
Sziasztok! Elvileg ma viszik el őket, de ha mégse akkor érdekel valakit? Üdv: pityesz
Pioneer SA-950
Sziasztok! Valaki rajtam kívül keresett sa-950 rajzot.Annyit tudok segíteni,hogy a Pioneer oldalárol letölthető az sa-620 rajza.Ez közel azonos vele/elő,végfok/,a feszültségértékek mások. kocsispapi
Mekkorák a táptrafó szekunder feszültségei
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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.

 
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