Sony KDL-46W705A / KDL-50W705A Service Manual ▷ View online
KDL-46W705A/50W705A 9
SECTION 2 - TROUBLESHOOTING
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 18
.
STANDBY LED BLINKING FLOWCHART
Protect
Shutdown.
Standby LED
Blinking
No
Yes
Power Supply
Board*
No
Yes
2X
Main Board*
3X
4X
No
Yes
5X
Yes
6X
No
7X
Immediately
LCD Panel*
TCON*
(LCD Panel)
Yes
No
After a while
Check ventilation
10X
HEM3 Board
8X
See Triage Chart
Main Board*
Power Supply
Board*
No
Yes
KDL-46W705A/50W705A 10
SECTION 2 - TROUBLESHOOTING
NO VIDEO FLOWCHART
No Video
Backlights
turned on?
Unplug LVDS
connector with
unit off. Turn unit
back on.
Test patterns
display on
screen?
Yes
No
TCON*
(LCD Panel)
Sony logo
appears
momentarily?
No
Main Board*
No
Yes
Yes
Main Board*
Locate
CN2 on
Power Supply
Board.
Zero volts at
Pin 2?
TCON*
(LCD Panel)
Yes
No
Zero volts at
Pin 4?
Yes
Main Board*
No
LCD Panel*
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 18
.
KDL-46W705A/50W705A 11
SECTION 2 - TROUBLESHOOTING
VIDEO DISTORTION FLOWCHART
Video Distortion
Is distortion
across entire
screen?
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
TCON*
(LCD Panel)
Main Board*
LCD Panel*
Any single or
isolated vertical
lines?
Yes
LCD Panel*
More than 1
vertical band?
No
Yes
TCON*
(LCD Panel)
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 18
.
KDL-46W705A/50W705A 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 4 screws from Table-Top Stand and pull down as shown to
detach from Rear Cover.
REMOVING THE REAR COVER
1. Locate and remove all screws from Rear Cover.
2. Remove 1 screw from AC Cover and disconnect the AC Power Cord.
HOLD
3. Grasp the AC Cover opening and the bottom right side of the Rear Cover,
then carefully pull upwards to detach.
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