4-8
4. Troubleshooting
4-1-4. No video_HDMI 1, 2, 3, 4 - Digital signal (A Type)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the HDMI source.
-
Check the HDMI switch, Check the Chelsea.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
Does the signal appear at
CN1002 (Pin#12 , #7 )(HDMI1)
CN1003 (Pin#12 , #7 )(HDMI2)
CN1004 (Pin#12 , #7 )(HDMI3)
CN1001 (Pin#12 , #7 )(HDMI4)
(HDMI RX_Clk , RX_Data) ?
Does the digital data appear at
TP - , O_TXCLK-,
, F_TXCLK- ?
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'
Input the HDMI signal properly.
Please, Contact Tech support.
Check CN1001, CN1002.
CN1003, CN1004.
Check HDMI cable.
Change the Main Assy.
Check IC301 (SX1).
Change the Main Assy.
No
No
No
No
No
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the HDMI source and
check the connection of HDMI cable ?
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
3
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 ...