4-5
4. Troubleshooting
4-1-3. No Video (Analog PC signal)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the PC source
Check the MT5382
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Check CN1000, PC cable.
Change the PC cable. Change the main
PCB assembly
No
Yes
Does the digital data appear at
output of R721~R740,R788~R791?
No
Yes
Power Indicator is off.
Lamp on, no video
Yes
Check the PC source and
check the connection of DSUB?
No
Input an analog PC signal.
Check the connected cable.
Yes
Check IC400
Change the main PCB assembly
Check the LVDS cable?
Replace the LCD panel?
Please, Contact 1 800 Samsung
No
Does the signal appear at
#AE18,#AE17,#AF16,#AC16,#AB17
(R, G, B, H, V) of IC400?
Does the digital data appear at output
of R1109, R1110, R1113P, R1114P,
R1116P, R1120P, R1122~R1128,
R1133, R1135, R1137P~R1141P,
R1143~R1150?
No
Check IC1101
Change the main PCB assembly
1
2
3
Yes
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LN32A550P3F
Страница 7: ...1 4 1 Precautions Memo ...
Страница 162: ...4 3 4 Troubleshooting ...
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Страница 165: ...4 6 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Страница 167: ...4 8 4 Troubleshooting WAVEFORMS 4 5 HDMI Input CLK 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
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Страница 170: ...4 11 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 8 Eagle Out Clk H Sync ...
Страница 171: ...4 12 4 Troubleshooting ...
Страница 173: ...4 14 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 8 Eagle Out Clk H Sync ...
Страница 174: ...4 15 4 Troubleshooting ...
Страница 176: ...4 17 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Страница 177: ...4 18 4 Troubleshooting ...
Страница 179: ...4 20 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 9 S VIDEO Input Y C ...
Страница 180: ...4 21 4 Troubleshooting ...
Страница 182: ...4 23 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 0 Component Input Y Pb ...
Страница 183: ...4 24 4 Troubleshooting ...
Страница 185: ...4 26 4 Troubleshooting WAVEFORMS Audio Input Sign Wave 12S Input Clk Data Audio Amp Out Sign Wave ...
Страница 186: ...4 27 4 Troubleshooting ...
Страница 197: ...4 38 4 Troubleshooting Memo ...
Страница 201: ...6 4 6 Wiring Diagram Memo ...