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5 Troubleshooting
5-14 DP15H*/DP17L*
5-2-3 Missing Color
Are proper Video levels
on CN101 (D-Sub) Pins 1, 3 and 5?
Are proper Video signal on all
cathodes?
Refer to 5-1-16 No Video.
Yes
Yes
No
Check signal generator.
No
Are proper DC voltage on all
cathodes?
Check IC101 Pins 15, 16 and 17.
Check QR01, QR02, QG01, QG02,
QB01 and QB02.
Yes
Yes
No
Is G2 voltage right?
Check D502, D503, Q501.
No
Is Heater voltage right?
Check D608, Q604, T601.
No
Yes
Check D504, Q602, T501.
No
Yes
Yes
Yes
Is G1 voltage right?
No
Replace CRT.
Done
22
WAVEFORMS
22
10.0 V (R,G,B, Video)
CH1 P-P = 10.0V CH1 RMS = 17.02V