Sharp LC-30HV4U Service Manual page 25

(3) NTSC signal adjustment
Item
1 Signal setting
2 MAIN N358 Y
CONTRAST Adjustment Signal pin: INPUT1, video
3 MAIN N358 COLOR
GAIN Adjustment
Adjusting conditions/points
Signal:
NTSC
Split field color bar
Page: 3
Location: Pin (1) of P801
Page: 3
Location: Pin (3) of P801
25
Adjusting procedure
• Use a signal generator to provide the split field color
bar to the video image input pin of video input 1.
• The color saturation of the color bar must be 75%. A
100% white area must be included.
• Make sure the 100% white area (synchronized)
shows 2.00 Vp-p when the color bar opens in
video mode. If not, adjust the signal generator.
Adjust "MAIN N358 Y CONTRAST" so that the 100%
white area shows 0.7 ± 0.01 Vp-p at pin (1) of P801.
0.7Vp-p
1 1
P801 P801
12 2
Adjust "MAIN N358 COLOR GAIN" so that the width
shown below is 0.525 ± 0.01 Vp-p at pin (3) of P801.
0.53Vp-p
LC-30HV4U
LC-30HV4D