MC2 Audio MC1250 Operating Instructions Manual page 12

Sw 3 (Normally ON) When OFF the LED columns will always show the signal level and will
not change to show the level control position when the level controls are adjusted.
Sw 4 & 5 These select the threshold level as follows:-
Sw 6 & Sw 7 operate together, they determine the operating mode and release time of the limiter as
follows:-
Sw 8 (Normally ON) This sets the attack time of the limiter. ON = Fast
MAINTENANCE -
The filter behind the air intake apertures on the front of the MC range amplifiers should be cleaned or
replaced periodically, e.g. 12-24 months. (Filters in amplifiers located in more 'dirty' atmospheres may
require more frequent maintenance). The filter should be 'dry' cleaned, using a vacuum cleaner preferably.
Running the unit without a filter is not recommended unless it is within a 'clean room'. Replacement filter
material is available.
No other regular maintenance is required.
If you have any doubt about carrying out this procedure, refer to a service engineer or contact your
dealer.
IF YOUR AMPLIFIER DEVELOPS A FAULT, PLEASE REFER TO YOUR SUPPLIER FOR
SERVICE AND TECHNICAL SUPPORT. DO NOT ATTEMPT TO REPAIR THE FAULT
YOURSELF AS THIS WILL INVALIDATE THE WARRANTY.
Sw4 Sw5
ON ON
ON OFF
OFF ON
OFF OFF
Sw6 Sw7
OFF OFF
OFF ON
ON OFF
ON ON
(ENSURE THAT ELECTRICAL POWER TO THE UNIT IS DISCONNECTED BEFORE
CARRYING OUT ANY MAINTENANCE.)
Just below clipping point.
1dB below clipping point.
2dB below clipping point.
3dB below clipping point.
Function
Release time = slow
Release time = fast
Automatic Gain Control mode. (Once the level has
been reduced it will remain at that level until changed
manually).
Limiter disabled.
12
OFF = Slow