HP 3150 EN - Manual (Page 88)

86 Removal and replacement EN
Removal and replacement strategy
This chapter documents removal and replacement of field
replaceable units (FRUs) only.
Replacement is generally the reverse of removal. Occasionally, notes
are included to provide direction for difficult or critical replacement
procedures.
WARNING! Unplug the power cord from the power outlet before attempting to
service the HP LaserJet 3100/3150 product. If this warning is not
followed, severe injury can result. Certain functional checks must be
performed during troubleshooting with power supplied to the product.
However, the power supply should be disconnected during
disassembly.
Never operate or service the HP LaserJet 3100/3150 product with the
protective cover removed from the laser/scanner assembly. The
reflected beam, although invisible, can damage your eyes.
The sheet metal edges of the HP LaserJet 3100/3150 product can be
sharp. Exercise caution when working the HP LaserJet 3100/3150
product.
CAUTION The HP LaserJet 3100/3150 product contains parts that are
electrostatic discharge (ESD) sensitive. Always perform servicing at an
ESD-protected workstation.
CAUTION If possible, print the configuration report before working on the product.
Removing the screws from the formatter board clears the settings in
memory. Clearing the settings can render the product illegal or
inoperable. The list of configuration settings can assist in restoring the
settings.
Note To install a self-tapping screw, first turn it counterclockwise to align it
with the existing thread pattern, then carefully turn clockwise to tighten.
Do not overtighten. If a self-tapping screw-hole becomes stripped,
repair the screw-hole or replace the affected assembly.
Note Always remove the toner cartridge before removing or replacing parts.