4-22
4. Troubleshooting
4-1-9. No Sound
Symptom
Video is normal but there is no sound..
-
Major
checkpoints
When the speaker connectors are disconnected or damaged.
When the sound processing part of the Main Board is not functioning.
Speaker defect..
-
-
-
Diagnostics
Caution
Make sure to disconnect the power before working on the IP board.
No
Check CN701 or CN805
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
Does the DC B3.3V, B12V
appear at C133, C112?
Check the source and
check the connection of sound cable
(Comp/PC/DVI to HDMI).
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
Check IC103 (Audio CODEC)
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
Does the I2C data appear at R416?
Check IC201 (Saturn4)
Check IC103 (Sound AMP)
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
Does the sound data appear at
C180, C177 (R +/-)
C179, C176 (L +/-)?
No
Please, Contact Tech support
Replace speaker
BN96-09463A
Does the sound data appear at
TP - V2SR, V2SL (AV2 R/L)
R745, R744 (Comp1, AV1 R/L)
R712, R713 (Comp2 R/L)
R749, R748 (DVI R/L)
R741, R740 (PC R/L)?
Yes
Yes
Yes
Yes
Input the sound source properly.
Yes
6
7
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 ...