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Only for training and service purposes
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2. Digital TV Video
Check RF Cable & Signal
Check Tuner 3.3V Power
L3703
Replace L3703.
Check Tuner 1.8V Power
IC3703 2 pin : 1.8V
Check IF_P/N Signal
TU3700 10/11 Pin
Replace IC3703.
Check Mstar LVDS Output.
Replace Mstar(IC101) or Main Board.
ok
ok
ok
ok
No
No
No
No
Bad Tuner. Replace Tuner.
3. Analog TV Video
Check RF Cable & Signal.
Check Tuner 3.3V Power.
L3703
Replace L3703.
Check Tuner 1.8V Power.
IC3703 2 pin : 1.8V
Check CVBS Signal.
TU3700 8 Pin
Replace IC3703.
Check Mstar LVDS Output.
Replace Mstar(IC101) or Main Board.
ok
ok
ok
ok
No
No
No
No
Bad Tuner. Replace Tuner.