Adjustment; Measuring Instruments, Jigs And Tools; Power-Supply Voltage; Power Circuit Closure - NEC MultiSync 20WGX2 Series Service Manual

4. Adjustment

4.1 Measuring Instruments, Jigs and Tools

The measuring instruments, jigs, and tools required at the time of the adjustment of the unit to be adjusted
are as specified below.
a. A signal generator that can generate an output of signal timing produced by the adjusted (*). In
this case, however, this signal generator should be capable of displaying all white and all black as a
screen display pattern.
* The word "adjusted" shall mean that the amplitude of each signal R, G, B, which is output from
the signal generator, is maintained at 0.7Vp-p ± 0.05V when a load of 75ohm is connected.

4.2 Power-supply Voltage

INPUT: 100Vac ~ 240Vac

4.3 Power Circuit Closure

1) Connect the suitable cable of the signal generator according to the setting mode.
2) Turn on the Power switch of the signal generator.
3) Connect the AC power cable to the unit being adjusted.
4) Turn on the Power switch of the unit being adjusted.
5) After the completion of signal discrimination, the LED is turned blue.

4.4 ADC Bias and Gain Adjust

1) Enter an input signal of VESA 1024x768 @ 60Hz, in 32-gray gradation.
2) Enter the factory mode according to "3.2 Enter Factory Mode"
3) Press the RIGHT or LEFT buttons several times to display the [AUTO CONTRAST] adjust menu.
4) Pressing the SELECT button, adjust the cursor to [AUTO COLOR]. When the SELECT button is
pressed, adjustment of the bias and the gain is carried out.
5) When adjustments have been finished, press the MENU/EXIT buttons several times to close the factory
mode.
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