4-14
4. Troubleshooting
4-1-6. No Video_Tuner DTV (A Type)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the DTV source.
-
Check the Tuner, Check the Chelsea.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
Does the DC TU5V_PW, TU33V_PW
appear at TP - TUNER_33V, B 5V
Pin of Tuner ?
Check the 'signal strength' in Self Diagnosis
menu Strength is enough ?
Does the digital data appear at
TP - , O_TXCLK-,
, F_TXCLK- ?
Yes
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'
Input the RF source properly.
Please, Contact Tech support.
Change the Main Assy.
Check the D-TV source.
Check IC301 (SX1).
Change the Main Assy.
No
No
No
No
No
No
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the RF source and
check the connection of RF cable ?
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
2
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for UN32C4000PD
Page 57: ...4 2 4 Troubleshooting Differential Point View Top Bottom A Type B Type ...
Page 61: ...4 6 4 Troubleshooting Location Main BOTTOM ...
Page 62: ...4 7 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 64: ...4 9 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Page 65: ...4 10 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 67: ...4 12 4 Troubleshooting Location Main BOTTOM ...
Page 68: ...4 13 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 70: ...4 15 4 Troubleshooting Location Main BOTTOM ...
Page 71: ...4 16 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 73: ...4 18 4 Troubleshooting Location Main BOTTOM ...
Page 74: ...4 19 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 76: ...4 21 4 Troubleshooting Location Main BOTTOM ...
Page 77: ...4 22 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 79: ...4 24 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Page 80: ...4 25 4 Troubleshooting WAVEFORMS 7 Speaker out ...
Page 84: ...4 29 4 Troubleshooting Location Main BOTTOM ...
Page 85: ...4 30 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 87: ...4 32 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Page 88: ...4 33 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 90: ...4 35 4 Troubleshooting Location Main BOTTOM ...
Page 91: ...4 36 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 93: ...4 38 4 Troubleshooting Location Main BOTTOM ...
Page 94: ...4 39 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 96: ...4 41 4 Troubleshooting Location Main BOTTOM ...
Page 97: ...4 42 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 99: ...4 44 4 Troubleshooting Location Main BOTTOM ...
Page 100: ...4 45 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 102: ...4 47 4 Troubleshooting Location Main TOP Location Main BOTTOM ...
Page 103: ...4 48 4 Troubleshooting WAVEFORMS 7 Speaker out ...