Samsung LRT19US Service Manual page 35

5-3 No Picture (TV)
Does a signal appear at
Pin No.1,2 of
7
FT707(X6966M)?
Yes
Does a signal appear at
8 R787,R788 and R793?
(VCT_ROUT,GOUT,BOUT)
Yes
Does a signal appear at
9
Pin No.99,98 of
10
IC107(VCT_H/V Sync)?
Yes
Does a signal appear at
RA709~RA714(ADC output)?
Yes
Does a signal appear at Pin
No.1~30 of CN400
6
(LVDS output)?
Yes
Replace LCD Panel.
No
Check CN702 and Tuner.
No
Check related circuit IC701
and Q704,Q705,Q706.(VCTI)
No
Check related circuit
IC701.(VCTI)
No
Check related
IC705.(MST9886)
Check IC400.(GM1501H)
5 Troubleshooting
WAVEFORMS
6
7
8
9
10
5-3