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
Remote control does not work Check if the unit is connected to the AC wall outlet and powered-on
Check if distance is not too far to the C1 unit. Get closer and try again. C1's Standby LED
should briefly illuminate
Change batteries in remote control if required (Remote control LED does not illuminate)
Make sure the C1 is not configured as Slave on the network (Settings / Network / Config)
Make sure Factory Setting / Remote control matches your RC5 remote control (Pre2 by
default)
No sound
(general)
Check that your source is playing
Check that your amplifier is turned-on and speakers are connected
Check that the system volume setting is not too low
Check that the correct input is selected on your C1
No sound
(“7” is displayed)
Your C1 is muted (display area 2 7 must be off). Unmute using first RC button
No sound
(“Fs UNKNOWN” is displayed)
There is no incoming digital stream for the selected input, or it is at an unsupported sampling
frequency. Check supported audio format in the specification table (chapter 7.1). Try switching
to another input to verify that your C1 works well on other inputs.
No sound
(“INVALID SIGNAL IN” is
displayed)
Incoming audio stream is non-PCM (e.g. AC3 or DTS).
Only play PCM on standard digital input, and PCM or DSD on CH-Link and ethernet streaming
inputs.
No sound
(“K” is displayed)
C1 is not locked to its clock source (symbol 7 should be a closed padlock J).
Please refer to advanced clocking chapter 4.5 for details on valid clocking combinations.
If you are using a clocking scheme involving external clock in/out (SYNC_IO optional board),
make sure 75 Ohm BNC cable is properly connected and not damaged.
No sound
(“CLOCKING ERR.” is displayed)
The source (e.g. D1 SACD/CD drive) and the C1 are not synchronized.
Please refer to Advanced clocking chapter 4.5 to make sure a valid clocking scheme is used. If
you are using a clocking scheme involving external clock in/out (SYNC_IO optional board),
make sure 75 Ohm BNC cable is properly connected and not damaged.
“ADC OVERFLOW ” is displayed
for a short time
The voltage exceeded 6V RMS at the input of the C1.
If it is only trigged by the landing of the needle of the cartridge on the record (which produces
a short signal overshoot), it is perfectly normal.
If this message appears in other conditions, it means that the global voltage level of the
analog source is too high and should be decreased
“ADC OVERFLOW ” is displayed
for a long time while playing
If the phono stage has no subsonic filter, the rumble noise boosted by the RIAAA correction
curve can lead to extremely high amplitude voltage swing at the input of the ADC, saturating
54 C1 User Manual Rev 1.9
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