LN46D550K1FXZA Fast Track.pdf

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LN46D550K1FXZA
Fast Track Troubleshooting Manual Rev -
1/10/12
SERVICE BULLETINS
POWER
PCB
2 011 LCD Option Byte Table
ASC20110624001.pdf
MAIN
Insert Photo of TV Board Layout
PCB
Include Board Assy names (as appearing in parts) and
LVDS
CABLE
any
DRIVER
special labels/items (i.e. Plasma voltage label)
BOARD
FIRMWARE
No current changes as of
12/29/11
Be sure to check for latest SW
updates.
SPEAKER
T-CON PCB
(under shield)
SPEAKER
PARTS (Board Assemblies)
Be sure to check for latest
parts updates.
HELP
:
1-888-751-4086; 1-866-894-0637 (FE)
http://gspn3.samsungcsportal.com
PLUS ONE
http://my.plus1solutions.net/clientPortals/samsung
HOT TIPS
Power On Problems:
(see
page 2)
Video Problems:
(see
pages 3,4)
TIP
If the unit has a vertical yellow
colored line that is one pixel wide in
the video, verify that it also affects the
OSD. If so, replace the panel. If it does
not affect the OSD and is in multiple
sources, replace the main board.
1
LN46D550K1FXZA
Fast Track Troubleshooting Manual
SW-P
Wiring Diagram
Include Connector Numbers , References, and
Locations.
Power On Sequence
(approximate Voltages)
)
1. Standby Voltages:
CN201-4 (5V)
2. Power On
CN201- 2(0 – 3.5V )
3. Low Voltage Supplies On
CN201-1,3,7,9,
11, 13 (Volts Listed on CN201)
4. Back Light On
CN201- 10(0-5V delayed)
5. Back Light Confirm
CNI802- “0VP”
(approx 03 Volts Dim - .1 Volts bright)
6. Dimming Signal
CN201-14 (1V–4V
approx
)
To Force Backlight On
without Main Board :
1. Remove Power Cord
2. Remove CN 801
3. Plug Power Cord In.
4. Backlight should be
on immediately.
2
Fast Track Troubleshooting Manual
TROUBLESHOOTING VIDEO PROBLEMS
1. Verify Video Operation
a.
Boot Logo with power on
b.
Customer Picture Test
in user menu
c.
“Display”
(If display and Boot Logo &
Customer Picture Test is OK the source or
cables are first suspected . Then check for a
defective input on the Main Board.)
d.
Substitute with known good Source
(external
DVD or Signal Generator
to check
inputs on Main Board)
T-Con Troubleshooting
2. Using Test Patterns in Service Mode
- ENTER SERVICE MODE
–
1.
Select an active source signal since
Test Pattern may rely on signal source to
appear or select TV Source mode.
Customer Remote
2.
Power Standby
3.
Mute, 182, Power On
4. Select SVC
5. Select Test Patterns
3
Service Remote
2.
Power On
3.
Info,
Factory
ON SCREEN FAILURE EXAMPLES:
Fast Track Troubleshooting Manual
ALIGNMENTS:
1. Check/Set Option Bytes: in Service Mode
If Picture & Display errors
Defective Main Board, LVDS,
or T-CON
Green lines or a green screen
defective main board , LVDS , or
T-CON.
Model
Code
Front
Color
Type
L
Model
Tuner
Regio
n
Pixelization can be caused by the main board
but is more commonly a source error
LN46D550K1
T-R-
46D6AF0C LD550 SI_ATC
BLK
FXZA
2. Check/Perform latest Firmware
Upgrade for all repairs.
3. Perform reset in Service Mode &
Plug and Play if Main board is replaced.
SPECIAL NOTES:
Vertical or Horizontal Lines :Defective
Panel likely but also T-CON, LVDS, or Main
Board. Use Test Patterns in Factory Service
Mode to determine error)
Inform customer of reset of all
Settings if Main Board or Panel is replaced.
4

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