Acer A315-53G Service Manual page 202

Unroute the speaker cable from the guides on the upper case.
3.
Continue unrouting the speaker cable from the guides on the bottom side of the upper case.
4.
Then remove the left and right speakers from the upper case.
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Figure 5-90. Unrouting the Speaker Cable
Figure 5-91. Removing the Speakers
Service and Maintenance