Samsung UN49KS850DF Service Manual page 52

4. Troubleshooting
SMPS POWER
„
1. Power TV On.
PS_ON . 2Vdc (when off) changes to 3.3Vdc (on)
√
May already be On if IoT USB is loaded or TV Smart Things Hub mode is active.
-
2.
if voltage error or no change.
√ Jog Function Control Test.
3. If OK replace Main Board.
√ All A13V supplies to full voltage level 12.7VDC.
4. If any wrong voltage, remove the SMPS connector to Main Board.
√ A13V again for 12.7VDC.
5. If OK replace Main Board.
6. If still wrong voltage replace SMPS.
OD
√ (Over Voltage Detect) : 3.3Vdc (Operating Normal)
7. If 0V or changing, an SMPS or Panel error exists.
8. Perform Backlight Test.
√ Backlight On/Off
√ If missing/error replace
49" / 55" SMPS Front
1 IF2 2 IF1
5 1- 6 5-
9 2- 10 6-
13 3- 14 7-
17 4- 18 8-
1 GND 2
4 GND 5
7 Vamp 8
10 Fail Count 11
13 A13V 14
16 PS_ON/OFF 17
19 GND 20
22 PWM7 23
25 PWM4 26
28 PWM2 29
4-4
0V Off to 5Vdc ON.
Main Board.
CNL801
3 1+ 4
7 2+ 8
11 3+ 12
4+
15 16
CNM803
GND 3 GND
Vamp 6 GND
OD_Level 9 Vamp
A13V 12 OD_ON/OFF
BLUEON/OFF 15 A13V
A13V 18 GND
GND 21 PWM8
PWM6 24 PWM5
PWM3 27 GND
PWM1 30 ANA_DIM
5+
6+
7+
8+
Fuse
CNL801
CNM803