Linear Acoustic LQ-1000, User Manual

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Linear Acoustic LQ-1000 User Guide
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Chapter 5: Troubleshooting
The Linear Acoustic LQ-1000 is a very stable and reliable unit, and most problems can be
traced back to mis-wiring causing incorrect signals to be applied to the unit, or more than
likely mis-configuration. As simple as the unit is to use once installed, it is very flexible and
thus necessarily somewhat complex. In an effort to speed troubleshooting, some common
problems and solutions are described below.
5.1 Problems and Possible Causes
One of the best troubleshooting features of the LQ-1000 is the hard-bypass of the audio
signals. This is useful because it allows instant removal of the unit from the signal path.
Hard-bypass can be accomplished two ways, the simplest being to remove AC power from
the unit by turning the power switch off. A less dramatic way to accomplish the same result
is to access the System Options menu and enable Master Bypass. If you are unsure of what
is happening in a particular system, simplifying the signal path is a good start and will help
isolate problems quickly.
5.1.1 Unit won’t power on
Check to make sure that the unit is connected to a live outlet (it happens...). If proper AC
voltage is being applied to the unit, remove power and check the fuse (the IEC inlet mod-
ule has a fuse compartment that can be carefully opened with a small screwdriver). If the
fuse is blown there is a spare in the holder. Install the replacement fuse, re-insert the fuse
carrier, and re-apply power.
NOTE: Replace fuses only with the same size and rating: 5mmx20mm T1AL (250V)
With the unit plugged in to a valid AC power source, press the Left, Up, and Right posi-
tions surrounding the rotary encoder. The Linear Acoustic logo blue LEDs will illuminate
first and the unit should then power on normally.