Chapter 6: Troubleshooting; Problems And Possible Causes; Unit Won't Power On; The "La" Symbol Is Flashing Red - Linear Acoustic AERO.qc User Manual

Audio quality controller with optional hd/sd-sdi and dolby decoding

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Linear Acoustic AERO.qc User Guide

Chapter 6: Troubleshooting

The Linear Acoustic AERO.qc 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 a necessarily complex processor. In an effort to speed troubleshooting, some com-

mon problems and solutions are described below.

6.1

One of the best troubleshooting features of the AERO.qc 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.

6.1.1

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 on the RIGHT navigation ring (i.e. a thumb on the 11 0'clock and 2 o'clock posi-

tions). The Linear Acoustic logo blue LEDs will illuminate first and the unit should then

power on normally.

NOTE: This may take some pressure as it is activating three buttons, but with a little

persistence and patience you will quickly get used to it.

6.1.2

The small Linear Acoustic logo in the upper right corner of the display is used to indicate

that the reference input is either missing or wildly incorrect. Check to make sure that an

AES reference signal is connected to the unit. Note that this signal can be either AES black

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