SELECTING THE PROPER OPERATING VOLTAGE
***CAUTION***
This procedure should only be performed by qualified service personnel experienced
in servicing high voltage, high power, electrical circuits.
AMERGRAPH AdVantage
335, 340, 350, 355, & 370 EXPOSURE SYSTEMS
operate within a voltage range of 205-245 volts. To obtain maximum operating efficiency,
an adjustment must be made at the power supply to match the normal line voltage to the
input of the power supply.
Before making any adjustment, disconnect the power to the machine by removing the wall
plug or shutting off the disconnect switch. Then remove the power supply cover plate.
For MODELS 335 & 340, the cover plate is located at the bottom rear of the unit.
For MODELS 350, 355, & 370, the cover plate is the middle panel of the front drawer. The
drawer is secured by two Allen cap screws requiring a 3/16” Allen wrench. To open the
drawer, loosen the screws but do not remove them.
Locate the YELLOW wire #14 connected to the terminal board on the power supply bearing
the tap values, 208, 220, 240 volts. After measuring the line voltage, connect the YELLOW
wire #14 to the terminal closest to the normal line voltage. Should the line voltage be
below 205 volts or above 245 volts, there is improper voltage and the unit should not be
operated until the deficiency in power is corrected. Your local electrician and power
utility can assist you in this matter.
LINE VOLTAGE TRANSFORMER TAP
205-214 208V
215-224 220V
225-245 240V
It is suggested to measure the voltage at the power outlet while the unit is operating. If the
line voltage falls into a different range than when originally measured, move the YELLOW
wire #14 to the next recommended tap.
***IMPORTANT***
Replace the cover on the power supply. Otherwise, damage to the
power supply and lamp will result from inadequate cooling.
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