Voltage Conversion 3-1
130445-1 Rev. A
MA-2402 Service Manual
©2000 Crown International, Inc.
Due to Crown's distribution of Macro-Tech amplifiers all
over the world, not all of these amplifiers are built with
the same power supply components. MA-2402 amplifi-
ers are built in one of the following two versions:
120 VAC, 60 Hz Units
These North American units have dedicated transform-
ers for 120 VAC, 60 Hz power mains. These units are
not convertable for use at any other voltage or frequency.
3 Voltage Conversion
100 – 240 VAC, 50/60 Hz Units
These units have mult-tap transformers that accept 100,
120, 220/230, or 240 VAC, and 50 or 60 Hz power mains.
Jumpers are used to configure the power supplies for
different voltages. Note that the circuit breakers, fuse,
fan motor and low voltage transformer may need to be
changed to accommodate different voltages. Refer to
Figure 3.1 for Main Transformer jumper locations and
part numbers for all voltage configurations. Figure 3.2
shows correct wiring of the Low Voltage Transformer
for 100-120VAC and 220-240VAC operation.
Figure 3.1 Voltage Jumper Settings and Parts
Figure 3.2 Low Voltage Transformer Wiring
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