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Troubleshooting
5. Troubleshooting
5-1 No Power
Counect the Power code
Check the 12.5V-A Line
Normal
Check the 3.3V-A,5V-A Line of IC201S
Normal
Check the X-tal,SDA,SCL port of IC201S
Abnormal
Abnormal Check the FD801S, D807, IC801S or AC-Fuse
Abnormal
Normal
Replace IC201 S
Check/Replace IC802
Check the (33)Pin (H-Drive) of IC201S
Abnormal
Normal
Check the 122.5V- A Line
Abnormal
Normal
Check the FBT,D805(D806)
Check / Replace Q401
Samsung Electronics
5-1
Troubleshooting
5-2 No Video (Sound OK)
Check RK,GK,BK Signal
Abnormal
Check R,G,B Signal into CRT PCB
Nornal
Check IC501 B+(180V-B)
Nornal
Nornal Abnormal Check the Voltage of heater Abnormal Abnormal Check the resistance of R420 Nornal Check/Replace R421,R422,D505 Abnormal Re-Adjust Screen Voltage
Nornal Check CRT and FBT
Replace R420
Abnormal
Check IC201S Pin 51,52,53 (R.G.B) Nornal
Check/Replace D812,FBT
Check/Replace IC201S
Abnormal
Check IC201S Pin 49(BCL-IN) Pin50(IK) Nornal
Check CRT and FBT
5-2
Samsung Electronics
Troubleshooting
5-3 No Sound (Video OK)
Checkthe signal Output from CN603 CN604 Abnormal
Normal
Check Speaker and Wire
Normal Check IC601 Pin1,2,14,15 Abnormal * STEREO Abnormal * MONO Abnormal Check IC601 B+ Normal
Check IC201S Pin28(MIS)
Check IC201S Pin28
Abnormal
Replace IC601
Check IC201S,TUNER
Normal
Normal
Check TUNER
Check R608,R609
Abnormal
Check ICS601 B+/SDA/SCL
Check/Replace IC201S
Normal
Replace/Check IC601
Normal
Check FD801S D807
Abnormal
Check/Replace ICS601
Normal
Replace FD801S,D807
See No Power
Samsung Electronics
5-3
Troubleshooting
5-4 Vertical Lines Appear or Screen
Check IC301 B+ 16V-C,-13.5V-C
Abnormal
Normal
Check R304,R305 D301,D302
Check IC201S Pin 21,22 (VDN,VDP)
Abnormal
Normal Check IC201S Check / Replace IC301
5-4
Samsung Electronics