6 Troubleshooting
Error
Action
No power
Check both AC power cords
Check the power switch at the back of the unit
Check the mains fuses on the AC power cord receptacle
Check all 3 fuses and replace if necessary (High power: T16A for 230V mains and T32A for
100V and 115V mains; Small signal: T1.6A for 230V mains and T3.15A for 100V and 115V
mains; Standby: T250mA for 230V mains and T500mA for 100V and 115V mains)
No sound
(general)
Check that your source is playing
Check that your M1.1 is turned on and that the loudspeakers 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 M1.1 amplifier
Check that the correct amplifier mode is engaged
No sound
(“
7
” is displayed)
Your M1.1 is muted (display area 3
7
must be off for the unit to output signal). Unmute the
unit using the top front panel push button
Lost in the settings?
Restore factory setting and start your setup again
Software update fails
Try Emergency Software Update procedure
If it fails, download the latest M1.1 firmware from
www.ch-precision.com
, prepare a software
update image on a FAT32 formatted USB stick and follow the Emergency Software Update
procedure again
USB flash drive for firmware
update is not detected by M1.1
Please try another brand of USB flash drive (e.g. Sandisk).
Troubleshooting
If the error cannot be corrected using the information from the above table, disconnect the unit from the AC wall socket and from
the rest of your system and contact your authorized dealer for assistance.
40
M1.1 User Manual
Rev 3.0
