Samsung UE40F6270SS, Service Manual, Page: 36 / 101

4-2. How to Check Fault Symptom
4-2-1. NO Power
Note
Refer to the next page to check the location 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 the power cord connection.
Yes
Check the backlight on, when 20 PIN
cable unconnected ?
No
Change 20p cable.
Change Main Power Ass’y.
Yes
Check ‘Stand-By 5V’ ?
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.
4-4
4. Troubleshooting