Samsung UN32D5500RF - No Video_Tuner DTV

4-13
4. Troubleshooting
No Video_Tuner DTV 
Symptom Audio is normal but no picture is displayed on the screen. -
Major
checkpoints
Check the DTV source. -
Check the Tuner, Check the Chelsea. -
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. -
Diagnostics
Main Assy
1 B5V 2 SW_PW
3 B5V 4 A5V
5 GND 6 GND
7 B12VS 8 GND
9 B12VS 10 SW_INV
11 B13V 12 NC
13 B13V 14 DMM
Power Assy
1 B5V 2 SW_PW
3 B5V 4 A5V
5 GND 6 GND
7 B12VS 8 GND
9 B12VS 10 SW_INV
11 B13V 12 NC
13 B13V 14 DMM
Main Ass’y
14p cable
Speaker
Power Ass’y
LVDS cable
T-con
Does the DC B1.8V B3.3V
appear at #3, #5 Pin of Tuner ?
Check the DTV data(DIF+, DIF-)
appear at #11, #10 Pin of Tuner ?
Check the 'signal strength' in Self Diagnosis
menu Strength is enough ?
Does the digital data appear at
TP-E_TXCLK+, E_TXCLK- ,
O_TXCLK+, O_TXCLK- ?
Yes
Yes
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'
Input the RF source properly.
Please, Contact Tech support.
Change the Main Assy.
Change the Main Assy.
Check the D-TV source.
Check IC1001 (X5)
Change the Main Assy.
No
No
No
No
No
No
No
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the connection of RF cable ?
Check the LVDS cable ?
Check the T-Con B'd ?
Replace the LCD panel ?

Yes
Check external devices and
connections.
No
check the Self Diagnosis
(SupportSelf DiagnosisPicture Test)
Dose the promblem still exist self diagnosis ?
Caution Make sure to disconnect the power before working on the IP board.