Sony KDL-50W655A Service Manual ▷ View online
KDL-50W655A 9
SECTION 2 - TROUBLESHOOTING
STANDBY LED BLINKING FLOWCHART
No
Yes
Yes
Yes
2X
3X
4X / NA
No
5X
Yes
6X
No
7X
Immediately
TCON*
(LCD Panel)
Yes
No
After a while
Check ventilation
Main Board*
LD Board*
Main Board*
Protect
Shutdown.
Blinking
Standby LED
Main Board*
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 18
.
KDL-50W655A 10
SECTION 2 - TROUBLESHOOTING
NO VIDEO
No Video
¿Backlights
turned on?
SONY
logo appears
momentarily?
No
Main Board*
No
Yes
Yes
Locate
CN8202 on
Main Board.
Zero volts at
Pin 5?
TCON*
(LCD Panel)
Yes
No
Pin 1?
Yes
Main Board*
No
LCD Panel*
Zero volts at
LCD Panel*
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 18
.
KDL-50W655A 11
SECTION 2 - TROUBLESHOOTING
VIDEO DISTORTION FLOWCHART
Video Distortion
Is distortion
across entire
Any
horizontal lines?
No
No
Yes
Yes
Improper or
missing
colors?
Yes
Main Board*
No
Vertical lines
or bars?
No
Yes
Lines move
when wide-mode
changed?
Yes
No
Main Board*
Any single or
isolated vertical
lines?
Yes
More than 1
vertical band?
No
Yes
screen?
LCD Panel*
LCD Panel*
(LCD Panel)
TCON*
(LCD Panel)
TCON*
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 18
.
KDL-50W655A 12
SECTION 3 - REPAIR INFORMATION
REPAIRING THE TV
If the latest Software does not correct the issue, complete the following:
1.
Verify the television has the symptom the customer indicated.
2.
Replace part causing the symptom.
3.
Install the latest version of Software (Required for ALL repairs).
4.
Perform the required service adjustments and checks..
5.
Verify the repair resolved the issue.
REMOVING THE TABLE-TOP STAND
1.
Remove 2 screws from Chassis Box and pull down as shown to detach.
REMOVING THE CHASSIS BOX
1.
Remove 1 screw from Bracket Top. Using a flat plastic object, separate
bracket and grasp as shown to detach.
2.
Locate and disconnect connectors.
3.
Press down the 2 locking clips and pull LVDS cable to release.
4.
Locate and remove all screws from the Rear Cover.
CAUTION: Do not use the Table-Top Stand
to hold or carry the TV.
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