Samsung CT20F3FNT - No Video (Sound OK)

5-2 Samsung Electronics
5-2 No Video (Sound OK)
Troubleshooting
Nornal
Nornal
Nornal
Nornal
Nornal
Nornal
Nornal
Abnormal
Abnormal
Abnormal
Abnormal
Abnormal
Abnormal
Abnormal
Check RK,GK,BK
Signal
Check R,G,B
Signal into CRT
PCB
Check the
resistance of R420
Check IC201S
Pin 49(BCL-IN)
Pin50(IK)
Check IC501
B+(180V-B)
Check the
Voltage of heater
Check
CRT and FBT
Check/Replace
D812,FBT
Re-Adjust
Screen Voltage
Replace
R420
Check
CRT and FBT
Check/Replace
IC201S
Check/Replace
R421,R422,D505
Check IC201S
Pin 51,52,53
(R.G.B)