Missing Color - Samsung DP15HS/HT Service Manual

5 Troubleshooting

5-2-3 Missing Color

Are proper Video levels
on CN101 (D-Sub) Pins 1, 3 and 5?
Yes
Are proper Video signal on all
22
cathodes?
Yes
Are proper DC voltage on all
cathodes?
Yes
Is G2 voltage right?
Yes
Is Heater voltage right?
Yes Yes
Is G1 voltage right?
Yes
Replace CRT.
Yes
Done
5-14
No
Check signal generator.
No
Refer to 5-1-16 No Video.
Check IC101 Pins 15, 16 and 17.
No
Check QR01, QR02, QG01, QG02,
QB01 and QB02.
No
Check D502, D503, Q501.
No
Check D608, Q604, T601.
No No
Check D504, Q602, T501.
WAVEFORMS
22 10.0 V (R,G,B, Video)
CH1 P-P = 10.0V CH1 RMS = 17.02V
DP15H*/DP17L*