Инструкции По Обслуживанию для HP laserjet 3390, 3392 all-in-one

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User-replaceable parts
To remove and replace the all-in-one tray 2 pickup roller or the tray 2 or tray 3 separation pad, see
.
Required tools 
#2 Phillips screwdriver with a magnetic tip and a 152-mm (6-inch) shaft length
Small flatblade screwdriver
#8 torx driver
Needle-nose pliers
ESD mat (if one is available)
Penlight (optional)
CAUTION
Always use a Phillips screwdriver (callout 1). Do not use a pozidrive screwdriver
(callout 2) or any motorized screwdriver. These can damage screws or screw threads.
CAUTION
Do not pull directly on the wires to disconnect them. Always pull on the plastic body
of a connector to avoid damaging the connector wires.
Figure 5-1
  Phillips and pozidrive screwdriver comparison
Before performing service
Remove all media from the all-in-one.
Turn off the power using the power switch.
Unplug the power cable and interface cable(s).
Place the all-in-one on an ESD mat (if one is available). If an ESD workstation or mat is not
available, ground yourself by touching the sheet-metal chassis before touching an ESD-sensitive
part.
Remove the print cartridge. See 
.
Remove the tray 2 cassette.
Lift the all-in-one off of the optional tray 3 (if it is installed).
ENWW
Introduction
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