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USB 1389 - 1390 - 1391 - 1392
Class-AB Power amplifiers
DÉPANNAGE
Témoin de fonctionnement est éteint
• contrôlez tous les fusibles de l’amplificateur
• contrôlez le fusible principal à proximité de la batterie
• contrôlez les bornes plus et moins des conducteurs de batterie
• contrôlez le voltage de commutation
Témoin de fonctionnement est allumé, mais on n’entend aucun son
• contrôlez le réglage du volume de la radio
• contrôlez la commande GAIN de l’amplificateur
• contrôlez les câbles et les connexions RCA
• contrôlez les câbles et les connexions des haut-parleurs
Réponse des graves est basse
• l’un des câbles du haut-parleur est peut-être déconnecté
• la commande des graves de la radio est réglée sur une valeur basse
• le filtre crossover actif est mal réglé
• contrôlez les commandes de l’amplificateur
• connexion de mise à la terre de l’amplificateur et du châssis incorrecte
Amplificateur s’allume et s‘éteint
• les bornes des câbles et les batteries sont oxydées
• faible tension de la batterie
branchement du câble à distance incorrect
Un canal ne fonctionne pas
• contrôlez la connexion RCA du canal correspondant
• contrôlez le raccordement des haut-parleurs du canal correspondant
• la commande de l’équilibre des sons n’est pas réglée à la position centrale
contrôlez les haut
-parleurs du canal correspondant
© US Blaster Europe BV
23


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