Asus P552W Manual page 33

A. Speaker
Please verify if the speaker mounted on the case is contacting with
on board speaker pin correctly. Otherwise, please follow the below
debugging procedure:
a. Speaker have no sound
1. Check the power +3.6V,
2. then check both side of R1024 and R1020 if there is any
high-low transaction
3. Check SPK_SHDN#(R1340) ,it should be high(2.8V).
4. if signal could be measured on SPKL, SPKR, but R1024,
R1020 have no signal，then U1003 ( Class-D Amp) NG，
change U1003.
We have found many speaker issue on this U1003 component
華 碩 電 腦
華 碩 電 腦
GTC ■ Service Manual
33