LG 39LN549E - TV Video Signal Troubleshooting

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Only for training and service purposes
2. Digital TV Video
3. Analog TV Video
Check the Stand-by Voltage
P401 3, 5pin : +3.5V_ST
Check the RF cable and RF signal.
Check the Tuner 3.3V
; L2606
Check the Tuner 3.3V
; L2606
Check the LVDS output signal of
Mstar IC.
Check the LVDS output signal of
Mstar IC.
Check the Tuner 1.8V.
IC2603 2pin : 1.8V
Check the Tuner 1.8V.
IC2603 2pin : 1.8V
Check the IF_P/N signal
TU2601~3 10/11pin
Check the CVBS signal
TU2601~3 8pin
Exchange the L2606.
Exchange the L2606.
Exchange the Mstar(IC101)
or Main board.
Exchange the Mstar(IC101)
or Main board.
Exchange the IC2603.
Exchange the IC2603.
Exchange the Tuner.
Exchange the Tuner.
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes