When No Sound Is Output (Speaker) (43"~75") - Samsung QB43R Service Manual

Troubleshooting

4-2-5. When no sound is output (Speaker) (43"~75")

• Video is normal but there is no sound.
Symptom
• When the speaker connectors are disconnected or damaged.
Main check
points
• When the sound processing part of the Main Board is not functioning.
Does Input signal appear to Main Board?
Troubleshooting
guide
1. Are speaker sound data of R+,R-,L+,L-
Precautions • Be sure to disconnect the power and start working.
4-14
Are Input signal and sound cable(PC/
HDMI) connection normal?
Yes
PC-L : TP502, PC-R : TP503.
Yes
Does I2C data appear to AUDIO IC?
AR01_B : BCLK / AR03_B : DATA
Yes
Of ACN01_B(pin1~4) normal?
2. Are Monitor output data of TP500,
TP501(HP_OUT_L/R) normal?
Yes
Change the Speaker
No Input normal signal.
Check CN502.
No
If necessary, change Main Board.
No Change Main Board
No Change AIC01_B or Main Board.
No Ask for technical support.