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APX_DPX Amps.qxd 2/6/2008 11:53 AM Page 21
4.Increase the volume and verify that the amplifier reproduces the audio at full frequencies without distortion.
If you hear distortion check the connections and verify that the gain control is set correctly. Another cause of distortion could be underpowered or damaged speakers. Refer to Troubleshooting.
6.TROUBLESHOOTING Indicator lights
The APX2181, APX4361, DPX1851 and DPX11551 have lights that indicate amplifier status.
Blue top | Red end- | Blue end- |
|
LED | panel light | panel light | Meaning |
On | Off | Off | Amplifier running normally |
On | Alternating between | In thermal protection mode | |
| red and blue |
|
|
Slow blink | Slow | Off | Over voltage; |
| blink |
| reduce the input voltage |
Quick blink | Quick | Off | Short circuit protection |
| blink |
|
|
3 blinks, | 3 blinks, | Off | Repeated shorts detected; |
then pause | then pause |
| remove the short circuit, wait |
|
|
| 5 minutes for error condition |
|
|
| to clear; or clear condition by |
|
|
| removing the main power, for |
|
|
| example, by pulling the fuse. |
|
|
|
|
English
No Audio
•Low or no remote
•Blown amplifier fuse: replace with a new
•Power wires not connected: check battery and ground wiring at the amplifier and check the battery connections.
•Speaker leads shorted: check speaker continuity to ground; it should not show a common ground.
•Speakers not connected or are blown: check speaker connections at the amplifier and measure at speakers. Measure coil impedance at amplifier with speaker wires disconnected.
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