Sony KDL-42W805B Service Manual ▷ View online
KDL-42W805B 9
SECTION 2 - TROUBLESHOOTING
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
LD Board
TCON*
(LCD Panel)
Yes
No
After a while
Check ventilation
10X
HEM3 Board
8X
Main Board*
Power Supply
Board*
No
Yes
10X
HEM3 Board
9X
Tuner Board*
Yes
No
Main Board*
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 18
.
KDL-42W805B 10
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-42W805B 11
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 REAR COVER
1.
Place TV on a flat and steady surface in a standing position.
2. Locate and remove all screws from the Rear Cover.
3. Grasp and pull upwards on left and right side of Rear Cover to release
all hooks.
CAUTION: To avoid any damage and/or deformation to the Rear Cover,
please refer to the following illustration.
Grab with Caution
(Sharp edges).
Ok to Grab
Ok to Grab
(Curled edges).
4.
After releasing the hooks, firmly lift upwards as shown to detach Rear
Cover from TV.
Cover from TV.
KDL-42W805B 12
SECTION 3 - REPAIR INFORMATION
5. Locate and remove screws from the Tuner Board and Main Board, then
lift to detach.
6. Install the new Main Board and/or Tuner Board and screws.
7. Reconnect the LVDS Cable and all other connectors.
8. Update the Software.
After ALL repairs UPDATE the SOFTWARE to the latest version.
Instructions are included with the Software package on the Sony
website.
Instructions are included with the Software package on the Sony
website.
a. Insert the USB device with the latest Software into one of the TVs’
USB ports.
b. Connect TV to AC power.
c. Wait at least 20 seconds.
d. PPress Power
I/0
on the TV to turn it ON..
e. Wait until the Software update is completed.
REPLACING THE MAIN BOARD / TUNER BOARD
The Main Board used in these models is available for repair. For Part
Number information refer to
Number information refer to
Section 4 - Exploded View/Part Number
Information on page 18.
1. Disconnect Harness from the Main Board.
2. Locate and disconnect remaining connectors.
3. Press down the 2 locking clips and pull LVDS cable to release.
4. Slide brackets to detach from Main Board.
Side
Bracket
Side
Bracket
Under Bracket
Under Bracket
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