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Samsung UN40F5500AF - How to Check Fault Symptom

Samsung UN40F5500AF
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NO Power
*Refer to the next page to check the lacation such a CN201 or IC201 SVC Manual mentioned.
Symptom
The LEDs on The front panel do not work when connecting The power cord.
The SMPS relay does not work when connecting The power cord.
The units appears to be dead.
Major
checkpoints
The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are
improperly connected or the Main Board or SMPS is not functioning. In this case, check the following:
Check the internal cable connection status inside the unit.
Check the fuses of each part.
Check the output voltage of SMPS.
Replace the Main Board.
Diagnostics
Power indicator LED is on?
No
Check a connetion power code.
Yes
Check the backlight on, when 20p cable
unconnected ?
No
Change 20p cable.
Change Main Power Ass’y.
Yes
Check ‘Stand-By 5V’ ?
No - BD207 : A5.3V
No
Yes
Check ‘Power input of Main Ass’y’ ?
- BD206/BD201 : B12VS
- BD214/209 : B13V
- BD208/BD213 : B5V
No
Yes
Check ‘Power IC output of Main Ass’y’ ?
IC202 : A3.3V
L202 : B1.15V / L201 : B5V
L203 : B3.3V / BD211 : B1.5V
No
Change the Main Ass’y.
Yes
Check Input power of ‘T-con board’ ?
- F1(T-CON) : B13V
No
Reconnect or Change.
the LVDS cable.
Yes
Check Power of ‘T-con board’.
- BD1(T-CON) : Panel_12V
- B1.1V(T-CON-TP) : FT1_1.1V_PW
No
Change the T-con Board
Yes
Please, Contact tech support.
Caution Make sure to disconnect the power before working on the IP board.
4-2. How to Check Fault Symptom
4-4
4. Troubleshooting

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