Cambridge Audio 840A Service Manual page 60

To rename inputs:
Press and hold the relevant input select button. Letters in the name are selected by turning the volume
knob.
To access the configuration menu:
Press and hold the Mode button. These are the menu options:
Clip detector on/off
LCD brightness (off/dim/bright)
Input gain trim menu access
Volume ramp on/off
Volume display: -84 to 0 dB or 0 to 72 units
Fixed input gain menu access
To adjust the gain of an input:
Press the button next to INP TRIM
Select the input required
Use volume knob to set gain between 0 and -12 dB
(the available range is restricted if the volume is set very low)
Press Mode button to return to volume display
To set up fixed input gain
Press the button next to FIXED INP
Select the input required
Set the fixed gain using the volume control.
Press Mode button to return to volume display
To access the service menu:
Hold in the Mode button when mains power is switched on. These are the menu options:
Speaker short detection on/off
DC offset detect on/off
XD system on/off
Counter access
Press Mode button to return to volume display
The counter page keeps a total of the number of times these events have occurred:
Clipping detected
DC offset detected
Overload protection
Overtemperature shutdown
Speaker short detected
Time on in hours
Press Mode button to return to service menu
To reprogram the PICs:
Hold in the ON/standby button when mains power is switched on. The word DOWNLOAD appears on
the LCD.
(the OFF setting does not disable the input- it leaves the input gain
subject to the volume control)
CL
DC
OV
TM
SH
ON
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