HP 3390 Service Manual - Page 158
Speaker, CAUTION,
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Speaker 1. Remove the left cover. See Left cover on page 116. 2. Disconnect one FFC (callout 1; J1) from the line interface unit (LIU), remove three screws (callout 2), and remove the LIU (callout 3). CAUTION PCAs are sensitive to electrostatic discharge (ESD). Look for the ESD reminder when removing PCAs. Always perform service work at an ESD-protected workstation or mat. If an ESD workstation or mat is not available, ground yourself by touching the sheet-metal chassis before touching an ESD-sensitive part. Protect the ESD-sensitive parts by placing them in ESD pouches when they are out of the all-in-one. CAUTION Do not bend or fold the flat flexible cables (FFCs) during removal or installation. Also, do not straighten pre-folds in the FFCs. You must make sure that all FFCs are fully seated in their connectors. Failure to fully seat an FFC into a connector can cause a short circuit in a PCA. 1 2 3 Figure 5-36 Remove the speaker (1 of 2) 3. Remove one screw (callout 4) and the metal plate (callout 5). 136 Chapter 5 Removal and replacement ENWW