4-24
4. Troubleshooting
4-1-8. No Sound (1.Speaker 2.Monitor_out, 3.Optical)
N
Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
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
MAIN BOARD
SMPS BOARD
T-CON
Check CN501, CN402.
Change the Main Assy.
Check IC301, IC303.
Change the Main Assy.
Check IC301, IC303.
Change the Main Assy.
No
No
No
Yes
Yes
Yes
Check the source and check the
connection of sound cable
(Comp/PC/DVI to HDMI) ?
Replace speaker ?
Input the sound source properly.
Please, Contact Tech support.
No
No
Yes
Check the signal at input of Main board?
AV1, COMP1 R : R541 / L : R539
PC, DVI R : L401 / L : L402
1. Check the Speaker sound data at ?
CN301
2. Check the Monitor out sound data
at ?
CN302
3. Does the SODIF OUT sound data
appear at ?
CN303
Check the DATA between the Audio IC’s ?
Pin #15 of IC301 : Mclk
Pin #20 of IC301 : LRclk
Pin #22,#23 of IC301 : I2C_DA/CL
2
1
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for UN40D6400UF
Page 37: ...4 4 4 Troubleshooting Location Main A B Detail A B...
Page 38: ...4 5 4 Troubleshooting Location T Con C Detail C...
Page 40: ...4 7 4 Troubleshooting Location Main B A Detail A B...
Page 41: ...4 8 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output...
Page 43: ...4 10 4 Troubleshooting Location Main B A Detail A B...
Page 44: ...4 11 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output...
Page 46: ...4 13 4 Troubleshooting Location Main B A Detail A B...
Page 47: ...4 14 4 Troubleshooting WAVEFORMS 1 CVBS OUT Grey Bar 2 LVDS output...
Page 49: ...4 16 4 Troubleshooting Location Main B A Detail A B...
Page 50: ...4 17 4 Troubleshooting WAVEFORMS 1 LVDS output 2 CH_CLK CH_VALID...
Page 52: ...4 19 4 Troubleshooting Location Main B D C A Detail A B C D...
Page 53: ...4 20 4 Troubleshooting WAVEFORMS 1 CVBS OUT Grey Bar 2 LVDS output...
Page 55: ...4 22 4 Troubleshooting Location Main B A Detail A B...
Page 56: ...4 23 4 Troubleshooting WAVEFORMS 1 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output...
Page 58: ...4 25 4 Troubleshooting Location Main B A C Detail A B C...
Page 59: ...4 26 4 Troubleshooting WAVEFORMS 1 MCLK LRCLK PCM_I2C_DATA 2 Speaker Monitor OUT SPDIF OUT...