Troubleshooting - Samsung CT566BVX/STR Service Manual

4. Troubleshooting

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