Voltage Conversion; Voltage/Frequency Conversion Chart - Crown Macro-Tech MA-5002VZ Service Manual

130446-1 Rev. A

3 Voltage Conversion

The MA-5002VZ power amplifier may easily be con-
verted to a variety of AC mains voltages and may oper-
ate at 50 or 60 Hz. Complete directions to accomplish
line voltage and/or frequency changes are found on a
label under the top cover of the unit. For convenience
this information is duplicated here and on the following
page.
Control Board Wiring for Different AC Voltages
NO. * * 100 V 120 V 200 V
P712 BLK BLK
P711 WHT WHT --NONE--
P724B BLU* BLU*
P707 BLK/GRN BLK/YEL BLK/GRN
--NONE-- --NONE-- BLK/YEL
P704
--NONE-- --NONE--
P705
WHT/GRN WHT/YEL WHT/RED
P710
P709 WHT/RED WHT/RED WHT/GRN
P708 WHT/YEL WHT/GRN WHT/YEL
P703 BLK/YEL BLK/GRN --NONE--
P701 GRY GRY
P700 GRY GRY
GRN/YEL GRN/YEL
P702 GRN/YEL
BLK/YEL BLK/GRN --NONE--
P713
WHT/YEL WHT/GRN WHT/YEL
P714
P722 BRN* BRN*
P749 WHT/RED WHT/RED WHT/GRN
P750 WHT/GRN WHT/YEL WHT/RED
P718 --NONE-- --NONE--
P716 --NONE-- --NONE-- BLK/YEL
P721 BLK/GRN BLK/YEL BLK/GRN
BLK BLK
P719
WHT WHT --NONE--
P715
P724A BLU* BLU*
P736 GRN/YEL GRN/YEL GRN/YEL
P735 GRY GRY
P734 GRY GRY
P742 BLK/YEL BLK/GRN --NONE--
P737 WHT/YEL WHT/GRN WHT/YEL
WHT/RED WHT/RED WHT/GRN
P744
WHT/GRN WHT/YEL WHT/RED
P743
--NONE-- --NONE--
P738
P739 --NONE-- --NONE-- BLK/YEL
P745 BLK/GRN BLK/YEL BLK/GRN
P724C BLU* BLU*
P741 WHT WHT --NONE--
P740 BLK BLK
P729***
120 V Position
P730***
Figure 3.1 Voltage/Frequency Conversion Chart
©2000 Crown International, Inc.
208 V 230 V 240 V
BLK BLK BLK BLK
--NONE-- --NONE-- --NONE--
BLU* BLU* BLU* BLU*
BLK/GRN BLK/YEL BLK/YEL
BLK/YEL WHT WHT
WHT WHT BLK/GRN BLK/GRN
WHT/YEL WHT/YEL WHT/YEL
WHT/GRN WHT/GRN WHT/RED
WHT/RED WHT/RED WHT/GRN
--NONE-- --NONE-- --NONE--
GRY GRY GRY GRY
GRY GRY GRY GRY
GRN/YEL GRN/YEL GRN/YEL
--NONE-- --NONE-- --NONE--
WHT/RED WHT/RED WHT/GRN
BRN* BRN* BRN* BRN*
WHT/GRN WHT/GRN WHT/RED
WHT/RED WHT/YEL WHT/YEL
WHT WHT BLK/GRN BLK/GRN
BLK/YEL WHT WHT
BLK/YEL BLK/YEL
BLK/GRN
BLK BLK BLK BLK
--NONE-- --NONE-- --NONE--
BLU* BLU* BLU* BLU*
GRN/YEL GRN/YEL GRN/YEL
GRY GRY GRY GRY
GRY GRY GRY GRY
--NONE-- --NONE-- --NONE--
WHT/RED WHT/RED WHT/GRN
WHT/GRN WHT/GRN WHT/RED
WHT/YEL WHT/YEL WHT/YEL
WHT WHT BLK/GRN BLK/GRN
BLK/YEL WHT WHT
BLK/GRN BLK/YEL BLK/YEL
BLU* BLU* BLU* BLU*
--NONE-- --NONE-- --NONE--
BLK BLK BLK BLK
240 V Position
MA-5002VZ Service Manual
INSTRUCTIONS
CAUTION: Because there is a risk of
electric shock, only a qualified technician
should change the line voltage configuration.
1. Turn the amplifier off and disconnect it from the AC
power source. (The enable switch alone does not re-
move lethal voltage from the line cord.) Wait at least 10
seconds before proceeding.
2. Drain any remaining energy from the power supplies
by shorting them as follows: Touch a 100 ohm, 10 watt
resistor across terminals A1 and A2 and across B1 and
B2 as shown in the illustration. The resistor should be
held across the terminals for 10 seconds. Be careful—
the resistor can become hot.
3. Locate the Control Board. It is the circuit board clos-
est to the front of the amplifier. It contains numerous
power supply connections which set the voltage and
one jumper block which sets the frequency.
4. Use the information in Figure 3.1 to connect the color-
coded wiring harness correctly for the desired voltage.
Configure each wire group one at a time so the wires
are not confused. Do not mix wires between groups.
This step may require you to cut one or more tie wraps.
If you do, replace them to make sure no loose wires are
able to prevent the fans from rotating.
5. Locate the frequency jumper (JP1) and set it for ei-
ther 60 Hz (left) or 50 Hz (right).
6. Locate the fan connector (P729/P730) and move it to
the appropriate voltage connector (left for 200-240 VAC
or right for 100-120 VAC).
7. Double check that all connections are correct and
replace the top cover.
* Wire colors marked with a single asterisk connect to the power cord.
** The connector numbers are listed in clockwise order from left to right
as you face the front of the amplifier.
*** Connection P729 and P730 are combined on a single four-pin connec-
tor. It mates to a "120V" connector for 100V or 120V operation or a
"240V" connector for 200, 208, 230 or 240 volts.
Voltage Conversion 3-1