KDL-50R555A, KDL-60R555A, KDL-70R555A - Sony TV Service Manual (repair manual). Page 17

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KDL-50R555A/60R555A/70R555A 13
SECTION 2 - TROUBLESHOOTING
VIDEO DISTORTION FLOWCHART
Video Distortion
Is distortion 
across entire 
screen?
Any horizontal 
lines?
No
No
Yes
Yes
Improper of 
missing 
colors?
Yes
Main Board*
No
Vertical lines
or bars?
No
Yes
Lines move 
when wide-mode 
changed?
Yes
No
LCD Panel*
Main Board*
LCD Panel*
Any single or 
isolated vertical 
lines?
Yes
LCD Panel*
More than 1 
vertical band?
No
Yes
LCD Panel*
Uneven 
brightness?
LCD Panel*
Yes
 
*For Part Number information, refer to 
“Section 4 - Exploded View/Part Number Information” on page 22
.
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