Operating instructions
2.5 Power Supply Conversion
ā Voltage Conversion
When the machine is used at a different voltage, the connection plug for the
power supply needs to be rewired. To change the wiring, remove the bottom
section of the back panel to expose the voltage selector plug (white nylon
connector) to the āLā bracket on top of the right chassis frame. Change the
wiring of the connector in accordance with the power supply circuit diagram,
or insert a new connector for new voltage.
ā Frequency Conversion
When the machine is used at a different AC line frequency, the voltage
supplied to the cooling fan must be changed because the efficiency of the
cooling fan is determined by frequency. To change the voltage to the fan,
remove the left side panel of the machine. The conversion switch is found on
the side of the power supply box located at the top right. Set the switch to the
line frequency to be used.
Section 2 Installation
2 - 14
October 1990
MTR-90III Operation and Maintenance Manual