HP 3390 Service Manual - Page 166
Laser/scanner, Left cover. See
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Laser/scanner 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-inone. 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. Remove the following components. ● Right cover. See Right cover on page 114. ● Left cover. See Left cover on page 116. ● Rear cover. See Rear cover on page 120. ● Top cover. See Top cover on page 122. 2. Disconnect one FFC (callout 1) from the laser/scanner PCA. 3. Disconnect one connector (callout 2) from the top of the laser/scanner. 4. Remove all of the wire-harnesses (callout 3) from the retainers. NOTE Examine the cable routing as you remove the wire-harnesses. 144 Chapter 5 Removal and replacement ENWW