User's Manual

Table Of Contents
Apollo Solo USB Manual 226
Troubleshooting
Troubleshooting
If Apollo Solo USB isn’t behaving as expected, some common troubleshooting items
to confirm are below. If you are still experiencing issues after performing these checks,
contact Technical Support.
SYMPTOM ITEMS TO CHECK
Unit won’t power on
Confirm USB 3 cable is connected to Apollo Solo USB
Confirm Apollo Solo USB is connected to built-in USB 3 port on computer
Confirm computer is started
Try a different USB 3 SuperSpeed cable
Note that not all USB 3 cables are SuperSpeed cables
Unit is not recognized
by computer
Confirm USB 3 SuperSpeed cable is fully inserted at both ends
Confirm latest Apollo Solo USB software is installed (reinstall if necessary)
Confirm computer port is USB 3 SuperSpeed port
No monitor output
Confirm connections, power, and volume of monitoring system
Confirm Apollo Solo USB monitor level is turned up
Confirm monitor outputs are not muted (push MUTE button when in monitor mode)
Confirm monitor LEDs are displaying signal activity (check signal flows)
Can't hear mic
or line input(s)
Confirm mic/line switch setting is correct for the channel
Confirm preamp gain is turned up for the channel(s)
On channel 1, confirm nothing is plugged into the Hi-Z input
Can’t hear mic input(s) Confirm +48V phantom power is enabled if required by microphone
Can't hear Hi-Z input
Confirm volume on connected device is turned up
Confirm Hi-Z input cable is 1/4” TS (TRS cables cannot be used with Hi-Z input)
Preamp controls have no effect
on channel
Confirm desired channel is selected for control
(push PREAMP button to select channel when in PREAMP mode)
Audio glitches and/or dropouts
during
DAW playback
Increase hardware I/O buffer size value in Console
Undesirable echo/phasing Confirm input monitoring is not enabled in both Console and DAW
Static and/or white noise is
heard when nothing is plugged
in
Mute or lower preamp gain to minimum on unused preamp channels
(mic preamps can emit noise even when nothing is plugged in)
Some UAD plug-ins model the noise characteristics of the original equipment
(defeat the noise model in the UAD plug-in interface, or mute the channel
containing the plug-in to temporarily mute the noise)
Various LEDs inside
the unit are blinking
This is normal operational behavior and can be safely ignored
Acoustic clicking heard within
hardware unit when powering
on and/or changing settings
This is normal operational behavior and can be safely ignored; mechanical relays are
temporarily muting the outputs
Apollo Solo USB is behaving
unexpectedly
As a last resort, perform a hardware reset on the unit by following these steps:
1. Power off Apollo Solo USB
2. Press and hold the main LEVEL knob, FILTER button, and POLARITY button while
powering on Apollo Solo USB
3. After all front panel LEDs ash rapidly for several seconds, release the controls.