Classe Audio CAV-500 Wartungshandbuch PDF herunterladen (Seite 7)

PRO-SVR_LEGACY Page 7 of 13

Troubleshooting Guide

Symptom Possible cause

Unit won’t turn on Check connections;

Check fuses;

Check soft-start circuit;

Check relays;

Check power supply circuits (positive rail, negative rail)

Smoked and/or burned

components

Check for short between components and ground;

Check output transistors;

Check power supply circuits (positive rail, negative rail).

Blown fuses Check for short between fuse and ground;

Check power supply circuits (positive rail, negative rail).

No output Check connexions;

Check output relays;

Check power supply circuits (positive rail, negative rail,);

Check output transistors.

Unit turn into protection Check for smoked and/or burned components;

Check power supply circuits (positive rail, negative rail,);

Check source and load;

Check protection circuit;

Check sensor wires between sensor PCB and control PCB;

Check outputs transistors and Mosfet drivers;

Perform updates, if necessary.

Excessive buzz and/or hum Check electrical lines;

Check for a ground loop in the system.

Oscillation Check source;

Check capacitors on main board;

Check 4.7ƻ resistor.

Intermittent signal Check connections;

Replace shield wires.

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Classe Audio CAV-500 Wartungshandbuch Seite 7