Sony KDL-48R485B Service Manual ▷ View online
KDL-48R485B 9
SECTION 2 - TROUBLESHOOTING
STANDBY LED BLINKING FLOWCHART
No
Yes
Fuente de Poder*
Yes
Yes
2X
3X
5X
No
Yes
4X
No
LCD Panel*
6X
“SONY” logo
appears before
shutdown?
No
Main Board*
Yes
Light Source
Board*
AC Adaptor /
Main Board*
Main Board*
Main Board*
Protect Shutdown.
Standby LED
Blinking
Yes
*For Part Number information, refer to
“Section 4 - Exploded View/Part Number Information” on page 16
.
KDL-48R485B 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 16
.
KDL-48R485B 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 TABLE TOP STAND
1.
Place TV face down on a flat and steady surface.
2.
Remove all screws and grasp as shown to detach the Table Top Stand.
REMOVING THE LOWER COVER
1.
Locate and remove all screws from the Lower Cover.
2.
Locate the areas shown in the illustration and detach the Lower Cover
from the TV.
KDL-48R485B 12
SECTION 3 - REPAIR INFORMATION
REPLACING THE MAIN BOARD
The Main Board used in these models is available for repair. For Part
Number information refer to
Section 4 - Exploded View/Part Number
Information on page 16.
1.
Slide the Side Bracket and Under Bracket to detach from Main Board.
Side
Bracket
Side
Bracket
Under Bracket
Under Bracket
2.
Locate and disconnect the connectors. Then remove all screws from
the Main Board and lift to detach.
3.
Install the new Main Board, connectors and screws.
4.
Update the Software.
After ALL repairs UPDATE the SOFTWARE to the latest version.
Instructions are included with the Software package on the Sony
Authorized Service Portal 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. Press
POWER
on the remote to turn ON the TV.
e.
Wait until the Software update is completed.
5.
To access
Service Mode, turn TV ON and OFF again then press the
following buttons within 1 second of each other:
DISPLAY
Channel
5
Volume
+
POWER
>>
Self diagnosis history
>>
Panel Selection
Wide Band Tuning
Wide Band Tuning
>>
LVDS Spectrum (%)
29
Tuning System
Auto
Status Digital RF Information
Off
Off
Low of HPD
5
UART Selection
Factory
SERIAL NUMBER EDIT
MODEL NAME EDIT
TEST RESET
MODEL NAME EDIT
TEST RESET
[</>]Set [Home] Exit
Service Mode
NS4S480DND0101
Status Information
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Off
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