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NXL-X800. 4 d
TROUBLESHOOTING
Before removing your amplifier refer to the list below and follow the suggested procedures.
Always test the speakers and their wires first
AMPLIFIER WON'T POWER UP
• Check for good ground connection.
• Check that remote DC terminal has at least 10V DC.
• Check that there is battery power on the+ terminal.
• Check all FUSES.
• Check that Protection LED is not lit. IF it is lit, shut off amplifier briefly and then re-power it.
HIGH HISS OR ENGINE NOISE (ALTERNATOR WHINE) IN SPEAKERS.
Disconnect all RCA inputs to the amplifier, if hiss noise disappears, then plug in the component
driving the amplifier and unplug lts inputs. If hiss noise disappears, go on until the faulty/noisy
component is found. Itis best to set the amplifier input level as insensitive as possible. "The best
subjective S/N ratio is obtainable this way. Try to drive as high a signal level from the head unit as
possible.
PROTECTION LED COMES ON WHEN THE AMPLIFIER IS POWERED UP.
Check for shorts on speaker leads. Check that volume control on the head unit is turned down low.
Remove speaker leads, and reset the amplifier f the Protection LED still comes on, then the
amplifier is faulty. The amplifier will shut down automatically when the units: temperature goes
up to 85*C This will protect the units from damage.
AMPLIFIER GETS VERY HOT,
Check that the minimum speaker impedance for that model is correct. Check for speaker shorts.
Check that there is good airflow around the amplifier. In some applications, an external cooling fan
may be required.
DISTORTED SOUND
Check that the Level controls is set to match the signal. level of the head unit. Check that all
crossover frequencies have been properly set. Check for shorts on the speaker leads.
HIGH SQUEAL NOISE FROM SPEAKERS.
This is always caused by a poorly grounded RCA wire.
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