60” and Above UHD T-CON Board Repair Guide
NOTICE: The Replacement of the T-CON on 60 inch and above UHD TVs requires good practice solderingtechniquesasitrequirestheswappingoftheFlashMemoryICfromthedefective soldering techniques as it requires the swapping of the Flash Memory IC from the defective
T-CON to the new replacement T-CON. If you do not feel you have the expertise to accomplish this task successfully, please do not attempt.
In this case; the replacement of the Panel will be required.
video Notetoothatthisvideoisprimarilyforanon modelbuttheprocessoftroubleshootingissimilarforUHD
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The situation: The TV has backlights, volume control, and channel selection. Check
the T-CON board
video. Note too that this video is primarily for a non-UHD model but the process of troubleshooting is similar for UHD.
(Fig 1)
1.(See Fig 1): Remove the T-CON board shield (If applicable) – replace all screws
(indicated by red arrows) before applying power to the board. Failure to do so
could result in the destruction of the EMFfilters or allow the T-CON to be missing
ground.
2.(See Fig 2): Apply power to the set and investigate the T-CON fuse. Confirm 12V is
available to the T-CON board on both the input and output side of the fuse. (Note:
2015 LF models have 13V )
(Fig 2)
At this point you know you have 12V power to the Main, the Main is turning on the
Panel_VCC. The power is arriving through the LVDS (Vx1) cable and is arriving on the fuse.
(Please see 12V P_VCCNote below and to the right).
There are 4 key voltages you need to investigate on most all T-CON boards. Understand not
all T-CONboardsarethesameandnotall4voltageswillbeexactlythesameasdescribedin CON boards are the same and not all 4 voltages will be exactly the same as described in
the video.
The 4 Key Voltages, (Voltages are approximate, they may vary several volts).
1.VCC (3.3V)
2.VGL (-5V)
3 VGH(28V)
12V P_VCC Note: UHD models will have 12V routing to the T-CON in any of the following ways:
1 12V switchedoutofthePowerSupply 3.VGH (4.VDD (16V)
1. switched out of the Power Supply.
2. 12V switched out of the Main board on a separate Power Plug.
3. 12V switched out of the Main as described here.
