4-4
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
shall be as specified below.
a. A signal generator that can generate an output of signal timing produced by the adjusted (*) VG-819 or
specified in [4. Setting method for the VG-819.] In this case, however, this signal generator shall 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 75
Ω
is connected.
4.2 Power-supply voltage
INPUT : 100Vac ~ 240Vac
4.3 Closure of the power circuit
1) Connect the suitable cable of the VG-819 according to the setting mode.
2) Turn on the Power switch of the VG-819.
3) Connect the AC power cable to the unit being adjusted.
4) Turn on the Vacation switch of the unit being adjusted (seesaw switch located on the right side of the unit).
5) Turn on the Power switch of the unit being adjusted.
6) After the completion of signal discrimination, the LED is turned green.
4.4 Bias and gain control
1) Enter an input signal of 1024
×
768 (75Hz), in 32-gray gradation.
2) Enter the factory mode according to “3.2 Specific key operation.”
3) Press the SELECT button several times to display the [AUTO CONTRAST] adjust menu.
4) Pressing the < (left) and > (right) buttons, adjust the cursor to [AUTO CONTRAST]. When the (+) key or
the (-) key is pressed, adjustment of the bias and the gain is carried out.
5) When adjustments have been finished, press the EXIT key to close the factory mode.
