Samsung CT566BVX/STR - Troubleshooting; 4-1 No Raster and No Sound

Troubleshooting
Samsung Electronics 4-1
4. Troubleshooting
4-1 No Raster and No Sound
Measure the B
+
Voltage at the Cathode
of D812 (D811)
No Raster and No Sound
Normal
Less than 50V
More than 130V
Check/Replace
IC801 Q801
Check the horiz
output signal at TR
collector.
Measure the B+
voltage at the cathode
of D812*
No Voltage
More than 130V
Normal
Normal
Check/Replace F801
Abnormal
Check/Replace AVR
Circuit, Horiz Output
Circuit and B+
Voltage Line.
Check +12.5 Line
Check/Replace FS
circuit
Check/Replace
AVR circuit
(ADJ Pin of STR)
Check/Replace
the AVR circuit.
Open
Check/Replace
1) D801
2) Short the
Degaussing Coil
3) C801
Check/Replace
the power switch
Normal