Samsung LED LCD TV_UN40EH5000FXZA (UN**EH TV Start Up Sequence) & T'CON Troubleshooting_Alignments {Universal Remote Control Codes for Samsung TVs}
Universal Remote Control Codes for Samsung TVs: 0030 0049 0050 0066 0076 0101 0102 0119 0143 0152 0154 0166 0181 0195 0209 0217 0240 0307 0318 0365 0379 0414 0421 0488 0492 0601 0624 0637 0642 0827
START-UP SEQUENCE
START-UP SEQUENCE
Sequence | Location | DC Voltage |
5V STBY to Main Board | CN803-12 (A5V) | 5V |
Power On/Off From Main Board | CN803-14(Power On/Off) | 0V-3.5V |
Low Volts On to Main Board with Booting Melody (X9 MStar) | CN803-1,3,5,7 (B13V) CN803- 11,13 (B5) | 13V 5V |
Back Light On/Off From Main Boar | CN803-6 BLU On/Off | 0V – 4.9V 5 Sec Dly |
Back Light Dim Control from Main Board 0 to 20 Backlight. | CN803 – 2 (PWM_DIMM) effective DC Voltage is max when backlight max. | 0.5V – 4.0V (effective) Dark to Bright |
Dim Control Out from IP SMPS to LEDs D1 – is max voltage when backlight is min. | CNL802-1 & 2 (D1 -) C NL802-4 & 5 (D1+) D1 + stays constant DC voltage. | 1.3V-32.8V 110.8V. |
Function Control Troubleshooting.
* Standby A3.3V on Function Connector, Pin -3.
* All Pins should read 3.3V before commands.
Function Control Troubleshooting
* Press, at Key 1, Pin 6. 3.3V to 0.0V DC
* Left, Right, Up, Down at Key 2, Pin 7. Check specific voltages on chart.
UNEH4000 SAMPLE
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TROUBLESHOOTING VIDEO PROBLEMS
Verify Video Operation (2012 Models)
a. Boot Logo models with X10 Micro-Processor & above during power on. Boot Sound only (X9 MPU) during power on.
b. Customer Picture Test in user menu
c.“Display” (If display and Boot Logo & Customer Picture Test are 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.)
Using Test Patterns in Factory Mode
ENTER FACTORY MODE
Select an active source signal since Test Pattern may rely on signal source to appear or select TV Source mode.
With Customer Remote.
# Power Standby
# Mute, 182, Power ON
# Select SVC
# Select Test Patterns.
With Service Remote
* Power On
* Info, Test
T'Con TROUBLESHGOOTING
FAILURE EXAMPLES
> If Picture & Display errors Defective Main Board, LVDS, or T-Con
> Green lines or a green screen defective main board , LVDS , or T-CON
Pixelization can be caused by the main board but is more commonly a source error.
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)
ALIGNMENTS
Check/Set Option Bytes: in Factory Mode. (Must be performed after replacing Main Board.)
Service Mode [Factory Mode]
Standard Remote
1. Power OFF the TV
2. Press MUTE, 1 8 2, then POWER.
Factory remote
1. Power the TV ON
2. Press INFO then FACTORY
> Check/Perform latest Firmware Upgrade for all repairs.
> Perform reset in Service Mode if Main board is replaced.
Note: Inform customer of reset of all Settings if Main Board is replaced.
Option Bytes settings for UN40EH5000.
2012 LED Hybrid Disassembly cautions for Front Cover
To prevent the removal process from damaging the connections on the sides of the panel.
* Place TV faces up on cushioned table.
* Cut and split the cover off at the top.
* Carefully remove the Front Cover and insulated paper in Front of T-Con area.
* Attach the Front Cover bottom first to the panel.
* Secure the plastic latch on the left and right side of the Front Cover as shown.
* Visually inspect the spacing between the Cover and the panel for equal clearance
* Combine to stick the Front Cover Rib into the middle mold.
Panel front disassemble
