Samsung LB15VS Service Manual page 33

5 Troubleshooting
5-2-3 Missing Color
Proper Video levels are
on CN101 (D-Sub) Pin 1, 3
and 5?
Yes
Proper video signal
22
to all cathodes?
Yes
Proper DC voltage to all
cathodes?
Yes
G2 voltage is right?
Yes
Heater voltage is right?
Yes
G1 voltage is right?
Yes
Replace CRT.
Done
5-14
No
Check signal generator.
No
Refer to 5-1-16 no video.
No
Check IC101 Pin 14, 15 and 16.
Check IC102.
No
Check T501.
No
Check D622, Q623 and R131.
No No
Check D504, Q512 and T501.
WAVEFORMS
22
10.0 V (R,G,B, Video)
LB15VS/LB17LS/LB17KS/
LB17LT/LB17KT