How To Check Fault Symptom; No Power - Samsung UN55HU7200F Service Manual

4. Troubleshooting

4-2. How to Check Fault Symptom

4-2-1. No Power

• The LEDs on The front panel do not work when connecting The power cord.
Symptom
• The SMPS relay does not work when connecting The power cord.
• The units appears to be dead.
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.
Major
checkpoints • Check the fuses of each part.
• Check the output voltage of SMPS.
• Replace the Main Board.
1
1
Diagnostics
2
3
4
4-4
Power indicator LED is on.
Yes
Check the backlight on, when 24P cable
unconnected.
Yes
Check 'Stand-By 5V'.
BD213 : A5.3V
-
Yes
Check 'Power input of Main Ass'y' .
BD206~BD208 : B13VS
-
BD200~BD205 : B13V
-
BD228 : B5V
-
Yes
Check 'Power IC output of Main Ass'y'.
IC210 : A3.3V
-
BD2208~BD2212 : B2.5V
-
L200 : B5V
-
BD1900, BD2206 : B3.3V
-
BD2203~BD2205 : B1.5V
-
BD2214~BD2216 : B1.12V
-
Yes
Check Input power of 'T-con Board'.
F1(T-CON) : PANEL_13V_PW
-
Yes
No Check a connetion power code.
No
No
Replace 24P Power Cable.
Replace Main Power Ass'y.
No
No Change the Main Ass'y.
Reconnect or Change the LVDS
No
cable.