NEC MultiSync FP1350 Service Manual page 76

7. Video Amplitude Adjustment
7-1. Settings
NOTE: Degauss the monitor using an external degaussing coil.
1) Confirm that the video signal of generator is as follows.
Video: Analog 0.7Vp-p ± 0.01V p-p (terminated 75 ohms ± 1 %)
2) Receive signal No.23 (All White), confirms that there is screen size of hereunder span. It is adjust in menu
TAG 2 (S),"H.SIZE", "V.SIZE", "H.POSITION", "V.POSITION" in the case as the outside of the span.
Horizontal Size
Vertical Size
Horizontal picture position: |XLeft - Xright | ≤ 3.0mm
Vertical picture position: |Xtop - Xbottom | ≤ 3.0mm
3) Open Menu (S), TAG 7,TAG 8,TAG 9,TAG A, TAG D and make sure that the following values are preset.
Menu (S), TAG 7
GAIN
R GAIN
G GAIN
B GAIN
OSM COLOR GAIN
Menu (S), TAG 9
G SUB BRIGHT
B SUB BRIGHT
R SUB BRIGHT
Menu(S), TAG D
CONTRAST PRESET: 150
7-2. Video Amplitude
1) Receive signal 23.
2) Open Menu (S), TAG7.
3) Adjust "+", "-" SW so that video amplitude at TP-R (R GAIN) on the CRT PWB is set to 45 Vp-p (+0V/ -1V).
4) When the indicated value of the video amplitude is not 45 Vp-p(+0V/ -1V) with Gain data maximum,
increase the R Gain values.
5) Adjust "+", "-" SW so that video amplitude at TP-G (G GAIN) ,TP-B (B GAIN) on the CRT PWB is set to 45
Vp-p(+0V/ -1V)
6) Push "EXIT" SW.
* When adjusting video amplitude, move cursor to desired function and push PROCEED button to hide
the OSM menu. Adjustment can be made with OSM menu hidden. OSM menu must be hidden since its
amplitude will appear on the wave form.
Signal: No. 23 (1600*1200@85Hz) Window pattern (H:33% V:33%)
: 396±3mm
: 297±3mm
Menu (S), TAG 8
: 200 SUB BIAS
: 200 R BIAS
: 200 G BIAS
: 200 B BIAS
:5
Menu (S), TAG A
: 150 COLOR PRESET : 1(9300K)
: 150 R COLOR GAIN
: 150 G COLOR GAIN
B COLOR GAIN
CONT.MAX.ADJ. : 150
Signal: No.23 (1600*1200@85Hz) Window Pattern (H:33% V:33%)
: 255
: 0
: 0
: 0
: 255
: 255
: 255
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