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BELMONT RADIO CORP. 551B, SERIES A SCH

AUDIO - SERVICE MANUAL
Type: (PDF)
Size
49.9 KB
Page
2
Category
AUDIO
SERVICE MANUAL
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BELMONT RADIO CORP. 551B, SERIES A SCH service manual (1st page)
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BELMONT RADIO CORP. 551B, SERIES A SCH service manual (2nd page)
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    BELMONT RADIO CORP. SERIES 551B 551
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  • See related repair forum topics below. May be help you to repair.
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Relevant AUDIO forum topics:
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.
tca530 helyettesítés
Üdv. Mindenkinek! http://elektrotanya.com/tca530_helyettesitese.jpg/download.html Kipróbáltam a kapcsolást a rajz szerint bekötve nem müködött! A TCA 10,11-es pontokat fel kellet cserélnem,hogy jó irányba szabályozzon az áramkör. Másik jelenség a szabályzás belengése volt,ezt az R801 R802 4,7Mohm-ok 1Mohm-ra cserélése oldotta meg. A TCA530-nál gyorsabb és sokkal szélesebb a bentartási tartománya. Józsi
Yamaha rx-v450 random újraindulás
Sziasztok.

Van egy yamaha rx-v450-es erősítőm amit elég rég nem használtam.
Most próbáltam ismét használatba venni, de sajnos lett vele valami.
Egy kis használat után random újraindulgat.
Valamikor el sem tud indulni.
Indulásnál behúz benne egy relé majd ki is kapcsol, ismét behúz majd ismét elejt.
Áramtalanítom várok egy picit akkor elindul, de kis idő után ismét kezd újraindulni.
Valamikor 10 percig megy, de valamikor csak 1 percig.

Van valakinek esetleg ötlete, hogy mi fáradhatott el benne?
Advance X-i50BT
Repair of the final amplifier / replacement of 8A fuses of the secondary power supply and transistors of the final stage of the amplifier. The diagram is not available - it is not published anywhere...
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