NEC MultiSync FP1370 Service Manual page 55

6-2. 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.
6-3. OSM Gain Adjustment
1) Receive signal 23.
2) Open Menu (S), TAG7 "OSM COLOR GAIN".
3) Adjust "+", "-" SW so that OSM video amplitude at TP-G on the CRT PWB is set to 31 (±4) Vp-p.
4) Push "EXIT" SW.
Signal: No.23 (1600*1200@85Hz) Window Pattern
45 +0/-1 Vp-p
Fig 6-1 Wave form of RK, GK, BK
Signal: No.23 (1600*1200@85Hz) All black
5-26
(H:33% V:33%)