Acer Aspire S3-391 Service Manual page 124

3. Secure the antenna cables to the upper case using adhesive tapes.
Figure 3-116. Antenna Cables Adhesive Tapes
4. Connect the two antenna cables to the WLAN module.
Figure 3-117. WLAN Module Antennas
+ IMPORTANT:
Connect the black cable to the main connector and the white cable to the
auxiliary connector.
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Machine Maintenance