Video Gain Adjustments - NEC MultiSync LCD2080UX -BKA Service Manual

3.6.2 VIDEO Gain Adjustments

Use the signal source for which the analog output (R/G/B) has been adjusted to 0.7V.
* Do both of INPUT 1/2 respectively because it becomes adjustment on the input side.
* Both are to do INPUT1(DVI Analog) and INPUT2(D-SUB).
1) Enter a signal input of UXGA (Signal 1 in the Input Video Signal Table) from INPUT1 (INPUT2).
2) Assume the FACTORY mode in the procedures of Paragraph 2.2.3 and display the SERVICE menu.
3) Press the RIGHT key twice and advance to the tab [3].
4) Adjust the display pattern to Gray Scale (0 to 100%: in 16 gradations) + Outer Frame.
* Remove SYNC because it doesn't become normal value when SYNC-ON-GREEN is being input.
(VG-819 : G is removed from CV of FUNC → OUTPUT.)
(VG-827 : The S/G signal is turned off.)
5) A SELECT key is press, and adjust the cursor to [AUTO CONTRAST]. Make adjustments by pressing the
(+)UP and (-)DOWN keys.
6) It fails in the adjustment when either value of R, G, B is less than 50. A signal and a signal cable are
checked and it adjusts again.
7) When adjustments are over and the original screen has been recovered, confirm that all the 16
gradations of black to white are displayed.
8) Press the EXIT key and withdraw from the SERVICE mode.
9) INPUT2(D-SUB) does it from 2) to 7), too.
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