4-2-7. No Sound (1.Speaker 2.Monitor_out 3.Optical)
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
Check the source and check the
connection of sound cable. (Comp)
No
Input the sound source properly.
Yes
1
Check the signal at input of Main Board.
AV, COMP L/R : R520
-
No
Check CN502.
Change the Main Ass'y.
Yes
2
Check the DATA between the Audio IC’s.
Pin #15 of IC500 : Bclk
-
Pin #20 of IC500 : LRclk
-
Pin #23,#24 of IC500 : I2C_SDA/
-
SCL
No
Check IC500.
Change the Main Ass'y.
Yes
3
4
Check the Speaker sound data at
1.
CN400.
Check the Monitor out sound data at
2.
CN2101_IBR.
Does the SODIF OUT sound data
3.
appear at OP400.
No
Check IC500.
Change the Main Ass'y.
Yes
Replace speaker ?
Yes
Please, Contact Tech support.
Caution
Make sure to disconnect the power before working on the IP Board.
4-22
4. Troubleshooting
Summary of Contents for UN HU7250F Series
Page 19: ...2 6 2 Product specifications Item UN HU7250FXZA Accessory Slim Gender Cable N A ...
Page 36: ...Waveforms 1 HDMI input RX_Data RX_Clk 2 LVDS output 4 9 4 Troubleshooting ...
Page 39: ...Waveforms 1 CVBS OUT Grey Bar 3 LVDS output 4 12 4 Troubleshooting ...
Page 42: ...Waveforms 2 CH_CLK CH_VALID 2 CH_CLK CH_VALID 3 LVDS output 4 15 4 Troubleshooting ...
Page 45: ...Waveforms 1 CVBS OUT Grey Bar 3 LVDS output 4 18 4 Troubleshooting ...
Page 69: ...Factory Menu Name Data Range B10_Gain Advanced 4 42 4 Troubleshooting ...