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USB 1389 - 1390 - 1391 - 1392
Class-AB Power amplifiers
RISOLUZIONE DEI GUASTI
Spaia funzione non lampeggia
controllate tutti i fusibili dell´amplificatore
controllate il fusibile principale vicino alla batteria
controllate i terminali plus e minus dei conduttori della batteria
controllate la tensione di commutazione
Spia funzione lampeggia, peró non si sente alcun suono
controllate la regolazione del volume della radio
controllate il comando GAIN dell´amplificatore
controllate i cavi ed i connettori RCA
controllate i cavi ed i connettori degli altoparlanti
Risposta bass del segnale é bassa
uno dei cavi dell´ altoparlante sará scollegato
comando bass della radio é al livello basso
crossover filtro attivo é regolato male
controllate i comandi dell´amplificatore
collegamenti di messa a terra dell´amplificatore con lo chassis irregolari
Amplificatore si accende e si spegne
terminali dei cavi e della batteria sono ossidati
bassa tensione della batteria
collegamento inesatto del cavo a distanza
Un canale non funziona
• controllate RCA connessione di tale canale
• controllate al connessione degli altoparlanti di tale canale
• comando dell´equilibrio acustico non é regolato in posizione centrale
controllate gli altoparlanti per tale canale
© US Blaster Europe BV
39


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