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SCHAUB LORENZ POLO GOLF 9005 SM

AUDIO - SERVICE MANUAL
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Category
AUDIO
SERVICE MANUAL
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    SCHAUB LORENZ POLO GOLF 9005
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Relevant AUDIO forum topics:
Philips lemezjátszó
SBF3AB IC-t keresek.Köszi Solyom
Bheringer Eurolive B215D
Salve, Cassa bruciata Bheringer Eurolive B215D Si tratta di una cassa Biamplificata con amplificatore per i Bassi in classe D e per gli alti un ic TDA7293. Oggi finalmente sono riuscito a risolvere questo guasto. Lo voglio pubblicare per aiutare il forum ringrazio per aver auto lo schema. Stato della cassa iniziale al ricevimento >accensione led rosso in protezione nessuna uscita audio in funzione. 1°passo: verifica del TDA7293 in corto circuito pin 7 con pin 14 = è bruciato!!!! da sostituire 2°passo: verifica oscillatore IC11 IRS20955 = NON OSCILLA bruciato!!!! - da sostituire. - Fatto... MA NON FUNZIONA!!! esamino il circuito meglio R72 rotta C89 in -- corto. Sostituisco anche C95 - = FUNZIONA!!! PER0' INTERVIENE IL LIMITER. - Ho dovuto fare questa modifica per urgenza. Del cliente. - Momentaneamente ho variato il valore di R38 da 100K A 10M. - IL LIMITER INTERVIENE MENO. Sè c'è qualcuno che mi può passare una dritta Spero di essere stato utile e di aver decritto bene il mio intervento Vi saluto buon lavoro a tutti Lucio.
QUAD405 BD242 nagyon melegszik.
Sziasztok. Az alábbi gondom lenne a QUADommal. Annak idején szereztem 2db őskövületet még a 80-as évek elejéről, és ennek álltam neki átalakítani az urbán féle quad-ra. Csak annyi átalakítást kellet orvosolnom hogy a T5 és T6 tranyó Emitter-Bázis közé kellet 1-1db 330-as ellenállás. Ugyan itt a bázisoknál a 75 helyett 82ohm. A hangszóró kimeneten 100n+10ohm sorbaköt. Az IC és környéke teljesen átépít. Helyette TL071 0,091ohm helyett 0,1ohm 5w Kimeneten nem BD249 van hanem 2SD1047. A BD242 maradt. BC212 helyett BC556, és BC300 helyett BC546 Ja és minden tranyó + elkó zsír új!!! A kapcsolásirajz és kész panelt összehasonlítva semmi gondot nem találtam összekötések szempontjából. De a BD242-es tranyók melegednek brutálisan. A 2SD1047-esek nem melegednek. Hangszóró kimeneten 80mV mérek. Ja és mind a két panelnál ugyan ez van. Szerintetek mi lehet-e gondok hátterében?
Sony STR-DE135 erosito Bass boost es Mute mikrokapcsolo hiba
Sziasztok! Van egy Sony STR-DE135 erosito, minden tokeletesen mukodik, egy dolog kivetelevel. A hangero allito poti jobb oldala mellett van ket mikrokapcsolo. Felul a Bass Boost es alatta a Mute gomb. A problema az, hogy amikor nyomogatom a Bass boost gombot, akkor veletlenszeruen, hol jol mukodik, hol a Mute gomb aktivalodik helyette, es van amikor teljesen erzeketlen. Ha a taviranyitorol nyomogatom ugyanezeket, ott tokeletesen mukodik. Valakinek van valami otlete ezzel kapcsolatosan? Az erosito mar ebben az allapotaban kerult hozzam, es meg sosem volt szetszedve. Segitsegeteket elore is koszonom.
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