Manley Neo-Classic 300B Preamplifier 2002 - 2008 - Manual (Page 4)

MAINS CONNECTIONS
Your Manley Neo-Classic 300B Preamplifier has been factory set to the correct mains voltage for your country.
(Well, that is what we intended to do when we knew where it would be initially shipped.) The mains voltage
that we built this Manley Neo-Classic 300B Preamplifier to operate with is marked on the serial badge, located
on the rear panel. Check that this complies with what comes out of your wall.
There is no voltage changeover switch! There are jumpers on the power transformer PCB that are soldered to
put the transformer primaries in parallel for 117v operation or into series for 230/240v countries so be sure to
check the sticker and the serial number voltage indication for proper mains voltage. Failure to properly comply
with mains voltage requirements can cause extensive damage to the system, which of course would not be
covered by the warranty. If you relocate from, say, a 120v country to a 240v country, you will need to change
power transformer jumpers or use a step-up outboard converting transformer.
The mains fuse may be checked by first disconnecting the IEC mains cord from the power supply’s power inlet
plug. Then gently push and rotate counterclockwise the fuseholder retainer cap. The fuse and cap should spring
outward toward your fingers. Inspect the fuse for the proper rating; change if necessary. Refer to the fuse rating
chart in the specifications section of this manual. If you do not know what a blown fuse looks like, you may
measure for continuity across the fuse ends. If your meter reads “OL” when you measure across the fuse, that
means “Open Leads” and that would mean the fuse is blown. A blown fuse usually indicates A Very Bad Thing
occurred. If this has happened to you, try to figure out why it may have happened. (Using a Fast Blow fuse
when
we have specified a SLO-BLO fuse is one reason...) If you have no idea why a fuse might have just blown on its
own, you might want to consult with Manley Labs or your dealer for further advice as something Very Bad
might
have occured, like the power transformer might have decided to retire early.
One way this could happen is by running the wrong mains voltage into the unit. Be sure not to do that.
If you live in a strange place...
Export units for certain markets have a moulded mains plug fitted to comply with local requirements. If your
unit
does not have a plug fitted the coloured wires should be connected to the appropriate plug terminals in
accordance
with the following code.
GREEN/YELLOW EARTH terminal
BLUE NEUTRAL terminal
BROWN LIVE terminal
As the colours of the wires in the mains lead may not correspond with the coloured marking identifying the
terminals in your plug proceed as follows;
The wire which is coloured GREEN/YELLOW must be connected to the terminal in the plug which is marked
by
the letter E or by the safety earth symbol or coloured GREEN or GREEN and YELLOW.
The wire which is coloured BLUE must be connected to the terminal in the plug which is marked by the letter N
or
coloured BLACK.
The wire which is coloured BROWN must be connected to the terminal in the plug which is marked by the
letter L
or coloured RED.
DO NOT CONNECT OR SWITCH ON THE MAINS SUPPLY UNTIL ALL OTHER
CONNECTIONS HAVE BEEN MADE. (...or else...)
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