Introduction; Electrical - MC2 Audio MC1250 Operating Instructions Manual

INTRODUCTION

Your MC750 digitally controlled power amplifier represents the latest technology in control circuitry
coupled to a no compromise high quality class AB power amplifier. There is no dynamic switching of the
audio or power rails (a very common method of achieving extra power at the expense of audio quality)
thus ensuring optimum sonic performance.
The digital control monitors the operating parameters and adjusts the amplifier to suit the conditions. Fan
speed and supply rails are varied as required to keep the amplifier within its temperature limits. The levels
are adjusted by specially selected, high performance, digitally controlled attenuators. Signal limiters are
included, the attack and release times of which can be adjusted internally by the bit switches on the
control PCB (printed circuit board).
The amplifiers include full DC and short circuit protection which automatically re-connects when the fault
is cleared.
INSTALLATION: ELECTRICAL
The amplifier has been manufactured to comply with your local power supply requirements, but before
connecting the unit to the supply, ensure that the voltage (printed on the rear panel) is correct and that a
mains fuse of the correct type and rating has been fitted.
Make sure power outlets conform to the power requirements listed on the back of the unit. Damage
caused by connecting to improper AC voltage is not covered by the warranty.
SAFETY WARNING
This unit is fitted with a 3 wire power cord. For safety reasons, THE EARTH LEAD SHOULD NOT BE
DISCONNECTED IN ANY CIRCUMSTANCE. If ground loops are encountered consult the section on
input connections later in this manual.
WHERE A FIXED MAINS LEAD IS FITTED, THE WIRING COLOURS ARE:
TO PREVENT THE LIKELIHOOD OF SHOCK OR FIRE HAZARD, DO NOT EXPOSE THE UNIT
TO RAIN OR MOISTURE.
TO AVOID ELECTRICAL SHOCK DO NOT REMOVE COVERS. REFER ALL SERVICING TO
QUALIFIED PERSONNEL.
DO NOT USE THE UNIT IF THE ELECTRICAL POWER CORD IS FRAYED OR BROKEN. The
power supply cords should be routed so that they are not likely to be walked on or pinched by items
placed upon or against them, paying particular attention to cords and plugs and the point where they exit
from the appliance.
ALWAYS OPERATE THE UNIT WITH THE AC GROUND WIRE CONNECTED TO THE
ELECTRICAL SYSTEM GROUND. Precautions should be taken so that the means of grounding of a
piece of equipment is not defeated.
DO NOT REMOVE THE LID. Removing the lid will expose you to potentially dangerous voltages.
There are no user serviceable parts inside.
230V AREAS: EARTH = GREEN AND YELLOW
NEUTRAL = BLUE
LIVE = BROWN
120V AREAS: EARTH = GREEN
NEUTRAL = WHITE
LIVE = BLACK
5