4-19
4. Troubleshooting
4-1-8. No video (Component 1, 2)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Component source
Check the chelsea.
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
No
Does the component data appear at
R725, R727, R728
(Comp1 / Y, Pb, Pr)
R702, R703, R704
(Comp2 / Y, Pb, Pr)?
Power indicator LED is off.
Lamp(Backlight) on, no video?
No
Check the component source and
check the connection of
component cables(Y,Pb,Pr)?
Check CN701
Change the Main Assy
550 32” : BN94-02518A
550 37” : BN94-02518B
550 40” : BN94-02518A
550 46” : BN94-02518D
550 52” : BN94-02518E
540 40” : BN94-02510A
540 46” : BN94-02510B
540 52” : BN94-02510C
Yes
Check IC201 (Saturn4)
Change the Main Assy
550 32” : BN94-02518A
550 37” : BN94-02518B
550 40” : BN94-02518A
550 46” : BN94-02518D
550 52” : BN94-02518E
540 40” : BN94-02510A
540 46” : BN94-02510B
540 52” : BN94-02510C
No
No
Does the digital data appear at
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
No
Please, Contact Tech support
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Yes
Input the component
source properly.
Yes
Yes
2
Check a set
in the ‘Stand-by mode’.
5
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LN32B550K1F
Page 171: ...4 3 4 Troubleshooting BD102 BD108 BD106 BD106 R102 R171 R173 C122 R527 Pin 1 5 F1 ...
Page 173: ...4 5 4 Troubleshooting Pin 19 Pin 20 Pin 34 Pin 35 PCR PCG PCB PCH PCV ...
Page 174: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 176: ...4 8 4 Troubleshooting Pin 7 Pin 12 Pin 19 Pin 20 Pin 34 Pin 35 Pin 7 Pin 12 ...
Page 177: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 179: ...4 11 4 Troubleshooting Pin 19 Pin 20 Pin 34 Pin 35 Pin 8 Pin 2 Pin 4 ...
Page 180: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 182: ...4 14 4 Troubleshooting Pin 19 Pin 20 Pin 34 Pin 35 Pin 2 Pin 4 ...
Page 183: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 185: ...4 17 4 Troubleshooting R408 Pin 19 Pin 20 Pin 34 Pin 35 TP V2CVBS ...
Page 186: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 188: ...4 20 4 Troubleshooting Pin 19 Pin 20 Pin 34 Pin 35 R725 R728 R727 R703 R702 R704 ...
Page 189: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 192: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...
Page 212: ...6 6 6 Wiring Diagram Memo ...