Page 1
Samsung Electronics
Troubleshooting
5-1
5. Troubleshooting
5-1 No Power
Counect
the Power code
Power LED
LED Off
Check the
12.5V-A Line
Abnormal
Check the
FD802S, IC801S
or AC-Fuse
Check
the
LED On
Normal
Check/Replace
IC802
Abnormal
Check the
3.3V-A,8V-A Line
of IC201S
Normal
Check the
X-tal,SDA,SCL port
of IC201S
Normal
Check the
(33)Pin (H-Drive)
of IC201S
Normal
Check the
130V- A Line
Normal
Check / Replace
Q401
Abnormal
Replace
IC201 S
Abnormal
Abnormal
Check the
FBT,D808
Page 2
5-2 Samsung Electronics
5-2 No Video (Sound OK)
Troubleshooting
Check RK,GK,BK
Signal
Nornal
Check the
Voltage of heater
Nornal
Check
CRT and FBT
Abnormal
Abnormal
Check/Replace
R418,R513,D503
Abnormal
Check/Replace
IC201S
Check R,G,B
Signal into CRT
PCB
Abnormal
Check IC201S
Pin 51,52,53
(R.G.B)
Nornal
Nornal
Check IC501
B+(180V-B)
Abnormal
Check the
resistance of R512
Nornal
Check/Replace
D407,FBT
Nornal
Re-Adjust
Screen Voltage
Abnormal
Replace
R512
Abnormal
Check IC201S
Pin 49(V-GUARD)
Pin50(IK)
Nornal
Check
CRT and FBT
Page 3
5-3 No Sound (Video OK)
Troubleshooting
Samsung Electronics 5-3
Abnormal
Check
IC101,TUNER
Abnormal
Check
B+ Line
5V-B, 8V-B
* STEREO
Check/Replace
Check IC601
Pin47(SIF)
Normal
Check IC601
B+
Normal
IC601
Checkthe signal
Output from CN602
CN603
Abnormal
Check IC602
Pin8,9
Abnormal
Check IC201S
Pin32(SIF)
Normal
Check/Replace
IC201S
Normal
* MONO
Check
Speaker and Wire
Abnormal
Check
IC101,TUNER
Abnormal
Normal
Check FD801S
Normal
Normal
Check IC602
B+
Check
R610,R611
D805
Normal
Replace
IC602
Abnormal
Replace
IC610,R611
Abnormal
Replace
FD801S,D805
See
No Power
Page 4
5-4 Samsung Electronics
Troubleshooting
5-4 Horizontal Lines Appear or Screen
5-5 No TTX
Check IC301 B+
16V-C,-13.5V-C
Normal
Check IC201S
Pin 21,22
(VDN,VDP)
Normal
Check / Replace
IC301
Abnormal
Abnormal
Check
R413,R414
D405,D406
Check
IC201S
Check IC201S
Normal
See No Video (Sound ok)
Abnormal
Check/Replace
IC201S
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