6 Troubleshooting
Error Action
No power Check the AC power cord
Check the power button at the back of the unit
Check the mains fuse on the AC power cord receptacle
No sound
(general)
Check that your source is playing
Check that your A1 is turned-on and that speakers are properly connected
Check that the system volume setting is not too low
Check that the correct input is selected on your D/A controller or preamplifier
Check that the correct input is selected on your A1 amplifier
Check that the correct amplifier mode is engaged
No sound
(“7” is displayed)
Your A1 is muted (display area 3 7 must be off). Unmute using first button
Lost in the settings? Restore factory settings and start your setup again
Software update fails Try Emergency Software Update procedure
If it fails, download the latest A1 firmware from www.ch-precision.com, prepare a software
update image on a FAT32 formatted USB stick and run the Emergency Software Update
procedure again
Troubleshooting
If the error cannot be corrected using the information from the above table, disconnect the unit from AC wall power and from the
rest of your system and contact your authorized dealer.
40 A1 User Manual Rev 2.0
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