Samsung CKG7507L

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