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 SETD-10 (SX1) -
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. -
Diagnostics
No
Check a B+ voltage (#4 of Tuner) 5V,
change a main PCB ass’y.
No
No
Power Indicator is off.
Lamp on, no picure.
Yes
Check a TU1651.
Change a main PCB ass’y.
Does the signal appear at L1654?
[4] Does the signal appear at
Pin 16 of TU1651?
Does the digital data appear at the
output of LVDS Signal?
No
Please, Contact Tech support.
Check the LVDS cable?
Replace the LCD panel?
Yes
Connect the RF cable and
check RF signal.
Yes
1
2
3
Yes
No
Check a IC1102.
Change a main PCB ass’y
Caution Make sure to disconnect the power before working on the IP board.
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