White Balance Check; Check Hdr; Dpm Operation Check - LG 27UL550 Service Manual

4.5 White balance check
‐. Before the factory calibration, check the White balance according to below specification.
HDMI 1920x1080( or 3840x2160), Full White
Tolerance : ‐/+0.015 / Luminance Spec(min) : 250
Check condition : custom mode(outgoing condition)
Aging Time [min]
Manual W/B process
*Note:
1) When in DC Off Condition
2) Press left button 3‐times and then right button 1‐times, press power button
3) Press Menu(right‐side of OSD) button and can see Service Menu.
4.6 Check HDR
‐. Before the factory calibration, check the White balance according to below specification.
1) HDR Mode check (HDMI)
‐. Equipment : MSPG‐7800
‐. Check Point : HDR OSD but this OSD disapper in few seconds
4.7 DPM Operation check
■ Measurement Condition: 100~240V@ 50/60Hz
1) Set Input to DisplayPort, HDMI1, HDMI2
x
2 0.319
4 0.318
8 0.318
10 0.317
25 0.316
40 0.315
255 0.313
y
0.339
0.338
0.337
0.336
0.333
0.331
0.329
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