Sony KDL-50R450A Service Manual ▷ View online
KDL-50R450A 9
SECTION 2 - TROUBLESHOOTING
STANDBY LED BLINKING FLOWCHART
Protect
Shutdown.
Standby LED
Blinking
No
Yes
Yes
Yes
2X
Main Board*
3X
No
6X
Power Supply Board*
“SONY” logo
appears before
shutdown?
Yes
No
LCD Panel*
Power Supply Board*
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 19
.
KDL-50R450A 10
SECTION 2 - TROUBLESHOOTING
NO VIDEO FLOWCHART
No Video
Backlights
turned on?
Unplug LVDS
connector at
TCON while unit
is running. This
may need to be
done more than
once.
Any flashes
seen on
screen?
Yes
No
Any OSD
graphics
present?
No
Main Board*
No
LCD Panel*
Yes
Yes
Main Board*
LCD Panel*
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 19
.
KDL-50R450A 11
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 19
.
KDL-50R450A 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.
5. Verify the repair resolved the issue.
REMOVING THE TABLE-TOP STAND
1.
Place TV face down on a soft and flat surface.
2.
Remove 4 screws from Table-Top Stand and carefully detach from
the TV.
REMOVING THE LOWER COVER
1.
Remove 1 screw from the AC Cover to detach from the Lower Cover.
Disconnect AC Power Cord to Detach.
2.
Locate and remove all screws from the Lower Cover.
3.
After removing the screws, hold the bottom of the Lower Cover as
shown, then lift carefully to detach.
NOTE
: Be careful and avoid damaging the connectors as speakers are
still connected to Main Board.
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