Arcam Alpha 3 - Manual (Page 9)

CHANGE OF MAINS VOLTAGE (ALPHA 3 AMPLIFIER)
WARNING - The unit must be unplugged from the mains supply when changing
the wiring or the mains fuses since the fuse is at mains potential even with the
unit switched off.
The Alpha 3 has a multi voltage transformer* so the same transformer can be
used for 240V, 220V and 120V by moving two of the three wires, (orange,
yellow or brown) and changing the fuse rating as necessary. The wire in the
bottom left hand corner determines the mains voltage, i.e. orange for 240V,
and the other two wires go into the holes marked "Spare Wires". The black
wire does not move. The pcb legend is shown below.
240V WIRING (800mA ANTI-SURGE FUSE)
^ BROWN lEI
SPARE WIRES BLACK
K YELLOW
240V ORANGE
s ORANGE 220V YELLOW
(This wire determines the voltage) 120V BROWN
220V WIRING (800mA ANTI-SURGE FUSE)
s BROWN lEI
SPARE WIRES BLACK
^ ORANGE
240V ORANGE
K YELLOW 220V YELLOW
(This wire determines the voltage) 120V BROWN
120V WIRING (1.25A ANTI-SURGE FUSE)
s YELLOW lEI
SPARE WIRES BLACK
^ ORANGE
240V ORANGE
Ki
BROWN 220V YELLOW
(This wire determines the voltage) 120V BROWN
‘ The first 100 Alpha Ill's have a 240/120V transformer and do not have the extra yellow wire. To convert these to 220V
requires a new transformer.