4.High Voltage Supplies On, (CNM803, #10,
SW_Inverter)
5.Back Light “On” Confirmation
To “Force-On” Back (Edge )Lights – See procedure on next page.
2
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UN55D6900WFXZAFast Track Troubleshooting Manual
Activating the Back Light
Page 4
UN55D6900WFXZA
Fast Track Troubleshooting Manual
1.Verify Video Operation
a. Customer Picture Test (models available)
b. “Display” (If display is OK source is suspected)
C. Substitute with known good Source
(external DVD or Signal Generator)
2. Using Test Patterns in Service Mode
- ENTER SERVICE MODE –
1. Select an active source signal. (HDMI preferred)
Test Pattern may rely on signal source to appear.
Customer Remote Service Remote
2.Power off 2. Power On
3. Mute, 182, Power 3. Info , Te st
2010 Models
FBE
FRC
1.Check OSD & Customer Picture Test.
2. Access SVC Mode (with source signal)
3. Activate FBE Test Patterns & Verify.
4. Activate FRC Test Patterns & Verify.
2011 LED 8000 SeriesTROUBLESHOOTING VIDEO PROBLEMS
1.Select an active source signal. (HDMI preferred)
Test Pattern may rely on signal source to appear.
2. Access Service Mode
3. Access SVC
4. Access Test Patterns
5. Access Genoa-P
6. Check Test Patterns
7. If OK suspect input Source
8. Access Napoli
9. Check Test Patterns
10. If OK and Genoa-P was not good
Suspect Main Board or LVDS Cable
4
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UN55D6900WFXZA
SEC_Si2173
SEC_Si2173
Fast Track Troubleshooting Manual
ON SCREEN FAILURE EXAMPLES:ALIGNMENTS:
Green lines or a green screen
defective main board , LVDS , or
T-CON.
If Picture & Display errors
Defective Main Board,
LVDS,
or T-CON
De-lamination: PANEL
FAILURE
1. Check/Set Option Bytes:
Model
Code
Side Label
H30155A1UF6EUD6900
HQ0255A1UF6EUD6900
UN55D6900WFXZA
TypeModelTuner
2. Check/Perform Firmware Upgrade for
all repairs.
3. Perform reset in Service Mode &
Plug and Play if Main board is replaced.
Option
Light
Effect
OFF-USU-T-CL-M
OFF-USU-T-CL-M
Ch
Table
Country
Front
Color
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)
SPECIAL NOTES:
Inform customer of reset of all
Settings if Main Board or Panel is replaced.
5
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