42LM670S, 42LM670T, 42LM671S, 42LM671T (CHASSIS:LD22E) - LG TV Service Manual (repair manual). Page 106

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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
2010. 12 .14
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