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7 Troubleshooting
7-5 No Raster (2)
Power indicator is Amber.
Does the +B output voltages
appear at the secondary side of
T601? (45 V , 72 V, 14.7 V ,etc)
Yes
Does the output
pulse appear at
3
Pin 18 of IC401?
Yes
Does H-sync appear at Pin 41
39
of IC201?
Yes
Replace OP101 and then refer to
No Raster (1) troubleshooting method.
WAVEFORMS
3
8.56 V (IC401, #18)
39
CH1 P-P = 8.56 V
CH1 RMS = 5.900 V
7-4
No
No
Check Q404 and its related circuits.
1. Check Pin 13 of the signal cable.
No
2. Check the H-sync input and output (Pins 13 and 10)
3. Check Pin 12 of CF202.
5.36 V (IC201, #41)
CH1 P-P = 5.36 V
CH1 RMS = 1.464 V
Check the power supply circuits.
And then if there are H-sync at Pin 41 of IC201,
refer to No Raster (1) troubleshooting method.
CKG7507L
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