Troubleshooting And Maintenance - Harman Lexicon DD-8 Guía De Usuario

DD-8 Power Amplifiers

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Troubleshooting
The amplifier does not power on.
The Trigger Input is connected to an external device, but the amplifier does not power on and
off with the external device.
Source signals are present and the system is at a suitable volume level but one or more
channels are not passing audio.
Audio sounds "thin" and is lacking proper bass response.
Audio Levels differ between channels.
Audio plays and then cuts off.
Operation Manual
1. Attempt to power on the amplifier with the front panel Standby/On button.
2. Examine the power cord to ensure a good connection between the rear panel AC input
connector and the wall outlet.
3. Check the wall outlet.
1. Verify the trigger cable is connected at both ends and verify that the trigger cable is
connected to the right device. Also re-verify the trigger installation instructions as
instructed in the Basic Operation section of this user guide.
2. Verify the trigger level of the output source device. The DD-8 accepts a range of
5-15VDC.
1. Reduce system volume level.
2. Power the DD-8 into standby mode.
3. Check input connections.
4. Check speaker connections.
5. Allow the amplifier to cool before powering it on again.
Check to ensure proper polarity of the speaker cables and connections.
1. Check the level settings of the DD-8 Output Level Controls.
2. Check the settings on your preamp, processor or controller.
Check input and speaker connections for short circuits or loose connections at the amplifier
and speaker.
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