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Problem Mögliche Ursache Lösung
DM-System brummt 1. Signalleitungen vom Quellgerät zum
DM-System zu lang
Kürzere Signalleitungen verwenden
2. Verwendete Signalleitung nicht abgeschirmt
oder die Abschirmung an der verwendeten
Leitung unterbrochen (defekt)
Leitung gegen eine geschirmte Leitung austauschen
3. Erdungsschleife (Brummschleife) „erzeugt“ Eine Erdungsschleife kann entstehen, wenn mind. zwei mit
Signalleitungen (Cinch) verbundene Geräte mit Schutz-
kontaktstecker (z. B. Verstärker und Computer) an örtlich
getrennten Steckdosen angeschlossen sind. Alle mit dem
DM 8.2 verbundenen Geräte mit Schutzkontaktstecker an
einer Steckdosenleiste (Vielfachsteckdose) anschließen
4. Ein nicht entstörter Verbraucher
(z. B. Kühlschrank) am Netz
Mögliche Störquellen zum Testen ausschalten; betreffendes
Gerät entstören lassen, falls das Brummgeräusch verschwindet
oder zunächst die Störquelle an einer anderen Netzphase
(L1, L2 oder L3) anschließen (Falls erforderlich, einen Fach-
mann zu Rate ziehen)
Speziellen „Mantelstromfilter“ (im Fachhandel erhältlich)
zwischen Quellgerät und DM-System schalten, um das
Brummen zu eliminieren
Netzstecker drehen, um die so genannte Brummspannung
zu reduzieren (besonders wichtig, wenn das Quellgerät nicht
geerdet ist)
Deutsch
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