SYMPTOM
Amplifier cuts off when driven to high output levels. Overload circuit activated (red LED on).
POSSIBLE CAUSE
Excessive output current is the only thing that can cause the Overload LED to light. There are only a few possible causes:
A damaged speaker cable touching the vehicle chassis, speaker cables or speaker tinsel leads touching each other, or damaged speaker voice coil.
Damaged passive crossover components.
Total speaker impedance is too low causing excessive output current.
Defective output transistor inside the amplifier
SOLUTION
With the speaker wires disconnected from the amp, use an ohmmeter to check for a short from any speaker cable to chassis ground. Check the DC resistance of the speaker's voice coil. It should be close to the speaker's nominal imped- ance specification and should fluctuate when the cone is touched. Visually check each speaker for damaged tinsel leads, or other broken parts. Smell the speaker's magnet area for a burned scent indicating a damaged voice coil.
Visually examine inductors, capacitors and resistors for signs of heat stress, water, or physical damage. Use a soldering iron to touch up connections to the crossover circuit board. Try substituting a different crossover network.
This condition will cause the overload LED to stay lit without speaker wires connected to the amplifier. The amplifier must be returned to an authorized service center for repair.
Authorized Phoenix Gold Service Centers
USA |
|
Phoenix Gold Factory | 877.745.3782 |
Canada |
|
Trends Electronics | 604.988.2966 |
