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3.9 Power Requirements
The Martin Audio Engineer 818 must be connected to a 100-240V AC 50-60Hz electrical power supply,
with a single phase, neutral and ground connection. Both the neutral and the phase of the power supply
(building fuse) need to be protected by a fuse with a maximum current of 16A. For safety reasons the
Martin Audio Engineer 818 must be connected to a properly grounded power outlet.
Always use the 3-pin IEC power cord supplied with the Martin Audio Engineer 818.
The power input fuse is located below the 3-pin IEC power input. Do not use a different type of fuse;
always replace a blown fuse with a compatible fuse.
3.10 Power switch
The Martin Audio Engineer 818 has a power switch which is accessible through the hole in the front panel
(please refer to the front panel layout). Although the device is designed to be left on at all times, it is
possible to un-power the device with this switch. To switch ON/OFF, use a Philips 1 screwdriver to
operate the power switch through the hole.
Warning: Since the mains power plug can be used as the main disconnection device, care must
be taken during installation that this plug is made easily accessible at all times.
3.11 Power LED
The blue power LED shows the status of the isolated 5V power supply to the digital circuits. When lit, this
power supply is active.
Note that the other internal power supply circuits do not have an external or internal status indicator.
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