Samsung LN26C350D1D, Service Manual

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4-10
4. Troubleshooting
4-1-4. No Video (Tuner_CVBS)
Symptom Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Tuner CVBS source
-
Check the Tuner (TU601)
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
Change the Main Assy.
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
No
Yes
Does the CVBS data appear at
#8 pin of Tuner?
No
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the HDMI source and
check the connection of HDMI cable ?
No
Insert the RF source properly.
Yes
Check Tuner.
Change the Main Assy.
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support.
No
Does the DC TU5V_PW, TU33V_PW
appear at #2, #4 Pin of Tuner?
Does the digital data appear at
Pin #16,17 (LVDS Data clk)
of LVDS connector?
No
Check IC201 (Saturn4).
Change the Main Assy.
LC350_26": BN44-00368A
LC350_32" : BN41-00369A
4
2
No Check if the set is in
'Stand-by mode.'
Caution Make sure to disconnect the power before working on the IP board.