LED R&D Lab(VD)
92
Black line found on white screen
① On the white screen, check that there is no black line found between cabinets. (See Fig.1.)
② Check for a gap or significant height difference between modules. (See Fig.2.)
※ If a gap is found: A black line is visible from all directions.
※ If a significant height difference is found: A white line is visible when viewed from one direction. When viewed from the opposite
direction, a black line is visible.
③ If a gap is found, move the modules with hands, beginning from the outer modules.
④ If a significant height difference is found, disassemble the lower LED modules and adjust the height
by turning the Holder-Magnet with an appropriate tool.
※ If the Holder-Magnet is turned halfway and then turned 360 degrees with the tool, the module height is moved by 0.1 mm (Fig.3).
CABINET
LED module 1
LED module 2
Height
difference
CABINET
LED module 1
LED module 2
Gap
Fig.1 Black line Fig.2 Gap / height difference
between modules
Fig.3 Adjusting height difference
Tool
Holder Magnet
Moves by 1
mm per full
turn
9. Seam Adjustment
9-1. Checking and adjusting seam
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