HP laserjet 3390, 3392 all-in-one Manuale Di Servizio

 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.

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.

Remove the following components.

●

Right cover. See 

●

Left cover. See 

.

●

Rear cover. See 

.

●

Top cover. See 

.

●

Formatter. See 

●

Duplex assembly. See 

●

Fan. See 

.

●

Duplex-drive gears. See 

.

●

Fuser. See 

●

Interlock assembly. See 

.

164

Chapter 5   Removal and replacement

ENWW