LG 27BK67U, Service Manual

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Only training and service purposes.
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when doing Adjustment, Please make circumstance as below.
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) : 280
Check condition : custom mode(outgoing condition)
Aging Time [min] x y
2 0.319 0.339
4 0.318 0.338
8 0.318 0.337
10 0.317 0.336
25 0.316 0.333
40 0.315 0.331
255 0.313 0.329
*Note:
Manual W/B process
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 (Don’t support)
‐ . 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