Samsung LH015I SERIES Installation Manual page 44

2. How to install
2-3 Physical Installation: Adjust Flush between LED modules
Specify the "Flush" position (LED module 2 a little pop up)
Flush: in white pattern mode , from one direction you will see black line, and
from another direction you will see white line
Flush
LED module 2
LED module 1
CABINET
Samsung Electronics
Guide spec
1) module Flush : 0.07mm↓
2) module gap : 0.05mm ↓
LED module 2
LED module 1 Flush
LED Display Installation