3. Analog RF Video Trouble Shooting guide
Check TU3001 Pin7(Video output)
Can you see the normal signal?
Check tuner 5V po wer L3000
YES
NO
Could you measure voltage of TU3001 & IIC lin es?
Are th ey all normal?
Check Mstar LVDS output
NO
You should check power line
& IIC lines.
YES
You should replace TUNER.
NO
Check IC5000
YES
YES
Check tuner 3.3V power L3001 Replace L3001
NO
Replace IC5000
Replace L3000
YES
NO
Check tuner 1.8V power L3003
Replace IC3000 or IC3000
NO
Check RF cable & signal
YES
NO
Replace Mstar(IC101)
or main board
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