55LA69XX, 55LA6908, 55LA6918, 55LA6928, 55LA690S, 55LA690V, 55LA691S, 55LA691V (CHASSIS:LD33B) - LG TV Service Manual (repair manual). Page 115

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Standard Repair Process Detail Technical Manual 
Adjustment Test pattern - ADJ Key 
A. Video error_Color error 
 
You can view 6 types of patterns using the ADJ Key 
 
Checking item : 1. Defective pixel    2. Residual image    3. MODULE error (ADD-BAR,SCAN BAR..) 
                           4.Video error (Classification of MODULE or Main-B/D!) 
 A12 
Established  
date  
Revised  
date  
Error 
symptom 
Content 
LCD  TV 
2012. 12 .06 
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