No Video (Tuner_Cvbs) - Samsung N64D Service Manual

4. Troubleshooting

4-1-4. No Video (Tuner_CVBS)

Symptom No video with a tuner source.
-
Check your source on the TV.
-
Major
Check your source content.
-
checkpoints
Check all connections.
-
Diagnostics
4
2
Caution Make sure to disconnect the power before working on the IP board.
4-10
40"
Power indicator LED is off.
Lamp(Backlight) on, no video
Yes
Check the HDMI source and
check the connection of HDMI cable
Yes
Does the DC TU5V_PW, TU33V_PW
appear at #2, #4 Pin of Tuner?
Yes
Does the CVBS data appear at
#8 pin of Tuner?
Yes
Does the digital data appear at
Pin #16,17,34,35 (LVDS Data clk)
of LVDS connector?
Yes
Check the LVDS cable?
Replace the LCD panel?
52"
No
in the 'Stand-by mode'.
No
Input the RF source properly
Change the Main PCB
No
26" : BN94-02679D
32" : BN94-02679D
No
Change the Main PCB
40" : BN94-02945D
52" : BN94-02945E
Check IC201 (Saturn4)
No
Change the Main PCB
40" : BN94-02945D
52" : BN94-02945E
No
Please, Contact Tech support
Check a set
Check Tuner