Vanguard CT-7500 S2 - Manual (Page 13)

REV 2 CT-7500 S2 USER’S MANUAL
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2.0 PRE-TEST SETUP
2.1 Operating Voltages
The CT-7500 S2’s operating voltage is selectable between 110-120 Vac, 50/60 Hz and 220-240
Vac, 50/60 Hz. In older production models of the CT-7500 S2, the operating voltage is set by the
voltage selection switch as shown in Figure 2. To change the voltage setting, remove the CT-
7500 S2 from its enclosure, locate the voltage setting switch on the right side of the unit, and
set the new operating voltage. Newer production models of the CT-7500 S2 can auto-sense the
voltage and do not have a voltage selection switch.
Figure 2. CT-7500 S2 Operating Voltage Setting Switch
2.2 LCD Screen Contrast Control
To increase the LCD screen contrast, press and hold the
[PAPER ∧ Contrast]
key for two
seconds. Release the button when the desired contrast level has been reached.
To decrease the LCD screen contrast, press and hold the
[PAPER ∨ Contrast]
key for two
seconds. Release the button when the desired contrast level has been reached.