No Video (Tuner Dtv) - Samsung N64D Service Manual

4-1-5. No Video (Tuner DTV)

Symptom No video on Tuner input.
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Check your source on the TV.
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Major
Check your source content.
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checkpoints
Check all connections.
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Diagnostics
2
Caution Make sure to disconnect the power before working on the IP board.
40"
Power indicator LED is off.
Lamp(Backlight) on, no video
Yes
Check the connection of RF cable
Yes
Check the 'signal strength'
in Self Diagnosis menu
Strength is enough?
Yes
Does the DC TU5V_PW, TU33V_PW
appear at #2, #4 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 cable properly.
No
Check the D-TV source.
No
Change the Main PCB
40" : BN44-00264A
52" : BN44-00267A
Check IC201 (Saturn4)
No
Change the Main PCB
40" : BN44-00264A
52" : BN44-00267A
No
Please, Contact Tech support
4. Troubleshooting
Check a set
4-13