Sony KDL-70R520A Service Manual ▷ View online
KDL-70R520A 9
SECTION 2 - TROUBLESHOOTING
STANDBY LED BLINKING FLOWCHART
Protect
Shutdown.
Standby LED
Blinking
No
Yes
No
Yes
2X
Main Board*
3X
5X
No
Yes
LCD Panel*
6X
Yes
“SONY” logo
appears before
shutdown?
Yes
No
LCD Panel*
Power Supply Board*
Power Supply Board*
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 20
.
KDL-70R520A 10
SECTION 2 - TROUBLESHOOTING
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 20
.
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*
KDL-70R520A 11
SECTION 2 - TROUBLESHOOTING
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 20
.
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
KDL-70R520A 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.
Place TV face down on a soft and flat surface.
2. Remove 4 screws from Table-Top Stand and pull to detach from Rear
Cover.
REMOVING THE REAR COVER
1. Remove all screws from the Rear Cover.
2. Remove 1 screw from AC cover and lift to detach.
3. Slide the Power Cord through the AC Cover opening to remove.
CAUTION: Make sure to remove the
Power Cord from AC Cover.
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