Lexicon LX Power Amplifier 070-14876 - Manual (Page 19)

Troubleshooting & Maintenance
Lexicon
3-2
TROUBLESHOOTING
No front panel LEDs are lit.
1. Make sure the unit is plugged in and the rear panel power
switch is set to on.
The Standby LED is flashing rapidly.
1. Power the amplifier off. Allow the amplifier to cool before
powering it on again.
2. Check the incoming line voltage. It should not be more than
10% below the mains supply voltage indicated in the
Specifications (page A-2).
One or more channels is not passing audio, and the
corresponding channel status LED is flashing red.
1. Reduce system volume level.
2. Power the amplifier off. Allow the amplifier to cool before
powering it on again.
A channel status LED is lit red.
1. Contact an authorized Lexicon dealer or Lexicon customer
service.
The standby button does not appear to be functioning.
1. Make sure the rear panel power switch is set to on.
2. Make certain the rear panel TRIGGER INPUT switch is set to
OFF.
One or more channels is not passing audio, but the
corresponding channel status LED is lit blue.
1. Make sure the UNBAL/BAL switch is set to the connector being
used (UNBAL for RCA and BAL for 1/4 inch or XLR).
2. Reduce system volume level.
Audio sounds out-of-phase.
1. Power the amplifier off with the rear panel power switch. Make
sure the MODE switch is set to the current configuration.
2. Check to ensure proper speaker wiring.
A humming sound is present in the audio.
1. Set the GROUND LIFT switch to ON.
One or more channels is outputting distorted sound.
1. Reduce system volume level.
2. Check the airflow around the amplifier and take the following
measures:
• Provide additional cooling.
• Make sure speakers have adequate impedance ratings (see
page 2-5).
The TRIGGER INPUT is connected to an external device, but the
amplifer does not power on and off with the external device.
1. Make sure the TRIGGER INPUT switch is set to ON or DELAY.