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BOLLETINO TECNICO GELOSO 105 1967

AUDIO - SERVICE MANUAL
Type: (PDF)
Size
15.3 MB
Page
44
Category
AUDIO
SERVICE MANUAL
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    BOLLETINO TECNICO GELOSO 105 1967
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Relevant AUDIO forum topics:
Sony XR-1800 tuner gyenge
Üdv Végfokot cseréltem benne most kiderült a tunerja fm-en nagyon gyenge. Lenne valakinek bontott hozzá? Balázs
Turntable Victor/JVC TT-71
Given:

Victor TT-71, neon lamp does not light, speed is lower than normal.  This is subsequent some short circuit the owner does inside the device.  No further details.

I found out the VICTOR QL7 have the same motor driver amd I downloaded the service manual that I attached here in case this manual is not already uploaded.

Looking at the diagrams I found out that at TP3 (same with pin5 of IC803) instead if that rectangular signal, I have nothing but 5VDC and a negative or positive short spike whenever I'm starting or stopping the motor and 
Under the circumstances I suspect IC803 is defective.  The bad thing, IC803 is NPC SC8043.  Also I wonder if the crystal is fine (except that I wonder what can be wrong with a crystal after some short circuit).

Does anybody have any more suggestion?

Also, where can NPC SC4043 be sourced?  Also, a crystal 9.054MHz?

Thanks in advance,
Corneliu
Aurex-Toshiba SC V50 erősítő kijelzője nem működik MEGOLDVA
Sziasztok!
Egy viharvert Aurex Toshiba SC V50 erősítő került a kezembe azzal, hogy végfok hibás. Azt meg is javítottam annak rendje és módja szerint, miután eltávolítotam a kb 100A-es sodrott vezetéket a biztosíték helyéről, és megjavítottam a zárlatos végfokot. Szépen beállt a középponti 0V feszültség, de a kijelző sötét maradt. Föltettem a SM-keresőbe a rajz keresést, de sajnos nincs eredmény.
Tudna valaki segíteni tanáccsal, esetleg rajzzal?
Köszönettel:
Attila
 A kérdés megoldódott:
A segédtáp 10ohm-os biztosítékellenállása megszakadt.
Köszönöm a hozzászólásokat!
Üdvözlettel:
Attila
Blaupunkt Travel Pilot DX-R70
Sziasztok A fenti autós berendezésnek nincs kijelzése, és nem is működik. Doksit sem találtam róla, ha valakinek lenne valami infója, megköszönném ha megosztaná velem. Köszönöm
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