4-11
4. Troubleshooting
4-1-5. No Video (Tuner_CVBS)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Tuner CVBS source.
-
Check the Tuner, Check the Chelsea.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
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?
Does the digital data appear at
TP-, E_TXCLK- ,
, O_TXCLK-?
Does the DC B5V_TU_PW, TU33V_PW
appear at #3, #5 Pin of Tuner ?
Check a set in the 'Stand-by mode'.
Input the RF source properly.
Please, Contact Tech support.
Check IC1102 (SX1).
Change the Main Assy.
Change the Main Assy.
Yes
Yes
Yes
Yes
No
No
No
No
No
2
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LA32C530F1R
Page 49: ...4 4 4 Troubleshooting MAINBOARD T T CON ...
Page 51: ...4 6 4 Troubleshooting MAINBOARD B ...
Page 52: ...4 7 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 54: ...4 9 4 Troubleshooting MAINBOARD T ...
Page 55: ...4 10 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 57: ...4 12 4 Troubleshooting MAINBOARD T ...
Page 58: ...4 13 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 60: ...4 15 4 Troubleshooting MAINBOARD T ...
Page 61: ...4 16 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 63: ...4 18 4 Troubleshooting MAINBOARD B ...
Page 64: ...4 19 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 66: ...4 21 4 Troubleshooting MAINBOARD B ...
Page 67: ...4 22 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 69: ...4 24 4 Troubleshooting MAINBOARD B MAINBOARD T ...
Page 70: ...4 25 4 Troubleshooting WAVEFORMS 6 Speaker out ...
Page 89: ...4 44 4 Troubleshooting 4 9 PCB diagram 4 9 1 PCB layout 4 9 2 Main TOP ...
Page 90: ...4 45 4 Troubleshooting 4 9 3 Main Inner 2 4 9 4 Main Inner 3 ...
Page 91: ...4 46 4 Troubleshooting 4 9 5 Main Bottom ...
Page 92: ...4 47 4 Troubleshooting 4 9 6 Power_32 SMPS 4 9 7 Power_37 SMPS ...
Page 93: ...4 48 4 Troubleshooting 4 9 8 Power_40 SMPS 4 9 9 Power_46 SMPS ...