Troubleshooting; Previous Check - Samsung UN HU7250F Series Service Manual

4. Troubleshooting

4-1. Troubleshooting

4-1-1. 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.
ASSY BOARD
P-SWITCH FUNCTION
ASSY BOARD P-HU7200 IR
3. How to distinguish if the problem is caused by
No Video
-
If the problem is No Video but BLU is on and Indication LED is blinking repeatedly and faster than nomal booting,
replace the T-CON board.
Distorted Picture
-
Check the inner patterns.
• For All mode
NT14U
OK
NG
NG
• Only for HDMI mode (additional check)
HDMI
OK
NG
ASSY PCB MAIN
NETWORK-WIFI MODULE
ASSY DECORATION SMT
NT72323BG FRC
OK
OK
NG
Picture
NG There is no problems after HDMI IC check HDMI source or HDMI jack.
NG There is no problems before HDMI IC check X12+ pattern or LVDS cable or T CON
LVDS Cable
ASSY T CON P
ASSY SPEAKER P (R/L)
Main Board or T CON
Picture
NG Main Board or Signal Source
NG Main Board
NG Main Board or LVDS cable or T CON or Panel
DC VSS-UHD PD BD
ASSY BOARD P-RF-MODULE
Problem
Problem
4. Troubleshooting
4-1