Troubleshooting - Samsung UA19F4000AR Service Manual

4. Troubleshooting

4-1. Troubleshooting
Previous Check
„
1.
Check the various cable connections first.
Check to see if there is a burnt or damaged cable.
-
Check to see if there is a disconnected or loose cable connection.
-
Check to see if the cables are connected according to the connection diagram.
-
2. Check the power input to the Main Board.
SMPS Model (UA28F4000A)
-
Main Ass'y
Adaptor Model (UA19F4000A/UA22F5000A)
-
BackLight Cable
Main Board Assy (CN201)
13 B13V
11 B13V
9 B13VS
7 B13VS
5 GND
3 B5.3V
1 B5.3V
* Change the 14Pin to PWM_DIM(2013 years) from B13V(2012 years)
3. Check the power in & output between IP & Main Board, Main Board & Panel, IP & Panel.
Power Ass'y
14P Cable
LVDS Cable
Speaker
Main Ass'y
Speaker
14 PWM_DIM 14
12 B13V 12
10 SW_INV 10
8 GND
8
6 GND
6
4 A5.3V
4
2 SW_PW
2
LVDS Cable
Power Board Assy (CNM803)
PS ON/OFF 13
A5V 11
GND 9
GND 7
BLU_ON/OFF 5
ECO_ON/OFF 3
PWM_DIM 1
4. Troubleshooting
B5V
B5V
GND
Vamp
Vamp
B13V
B13V
4-1