Samsung UN55D6900WF - No Sound (1.Speaker 2.Monitor_Out, 3.Optical)

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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.