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5 Troubleshooting
5-2-3 Missing Color
Proper Video levels are
on CN101 (D-Sub) Pin 1, 3 and 5?
Yes
Proper Video signal is
22
on all cathodes?
Yes
Proper DC voltage is
on all cathodes?
Yes
G2 voltage is right?
Yes
Heater voltage is right?
Yes
Yes
G1 voltage is right?
Yes
Replace CRT.
Yes
Done
5-14
No
Check signal generator.
No
Refer to 5-1-16 No Video.
Check IC101 Pin 17, 20 and 23.
No
Check QR01, QR02, QG01,. QG02,
QB01, and QB02.
No
Check Q501 and D520.
No
Check D608, Q604 and T601.
No
No
Check D504, Q502 and T501.
WAVEFORMS
22
10.0 V (R,G,B, Video)
CH1 P-P = 10.0V
CH1 RMS = 17.02V
PN17K*/PN17J*
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