Alignment Procedures - Medion B1770NSL Service Manual

MEDION

5-2 Alignment Procedures

5-2-1 High Voltage Adjustment
CONDITION
Display image : Crosshatch pattern
PROCEDURE
Connect DC meter to TP5 and adjust VR401 to obtain a DC voltage of -130 ± 0.2 V DC.
5-2-2 Screen and White Balance Adjustment
CONDITION
Press and buttons simultaneously when switching the power "On".
1 2
Bias VRs : VR961, VR901, VR931
Display image : No video
PROCEDURE
1 Raster color setting
1-a. Set Brightness through OSD menu to -40 V at G1 and 560 V at G2.
1-b Adjust VR961, VR901 and VR931 to maximum.
1-c Adjust VR931 to raster just distinguish.
1-d Set Brightness to maximun.
1-e Adjust VR901 to get x=280 ± 5 and VR961 to get y=280 ± 5, brightness = 0.9 ~ 1.2 FL.
1-f Adjust Brightness to cut-off.
CONDITION
Display image : 50 mm x 50 mm white block pattern
PROCEDURE
0
2 6500 K color temperature setting
2-a. Set Brightness to cutoff and Contrast to maximum.
2-b Move cursor on OSD to choose color temperature icon.
2-c. Press key to G gain then adjust G gain = 68 value, then adjust B, R to y=329±5, x=313±5.
2
2-d Check x=313±5, y=329±5.
0
3 9300 K color temperature setting
3-a. Set Brightness to cutoff and Contrast to maximum.
3-b Move cursor on OSD to choose color temperature icon.
3-c. Press key to G gain then adjust G gain = 85 value, then adjust B, R to y=311±5, x=281±5.
2
3-d Adjust contrast to set Y=38±2FL
3-e Check x=281±5, y=311±5.
3-f TCO99-model 9300
4 Full white ABL setting
CONDITION
Display image : full white pattern
4-a Set Brightness to cutoff and Contrast to maximum.
O
K color temperature setting y=297±5, x=283±5.
MD 1772LB (B1770NSL/T)
Page 17