6-1. I Ntroduction; General; Tools Required - HP LaserJet II Serie Manual De Instrucciones

HP 33440/HP 33449 COMBINED SERVICE MANUAL
6-1. I NTRODUCTION
General
The service philosophy for the HP 33440 and HP 33449 printers centers on the modular-level
replacement of electro-mechanid assemblies and some associated components as well as the
assembly-level replacement of printed circuit assemblies (PCAS). No attempt should be made to
identify component failures within these assemblies. The components and the procedures for their
removal and replacement are essentially the same for both printers. Unless specifically noted,
replacement is the reverse of removal.
The procedures in this chapter atiempt to be as thorough as possible regarding the removal and
replacement of specific assemblies with minimal removal of other components. Figures in Chapter
8, although not generally referenced, will dso be found to be useful. The service representative
should use these procedures as a guide to build familiari~ with the replaceable components of
both printers. In referring to the orientation of the various assemblies, the front of the printer is
the Control Panel/Paper Tray end.
caution
Power-off the printer by disconnecting the power cord from the power source and
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remove the EP-S Cartridge before attempting to disassemble the printer. Also
Wow time for the Fusing Assembly components to cool before handling.
Tools Required
Magnetic Phillips No. 2 screwdriver with minimum 4-inch shaft.
Needle-nose pliers.
Small flat-blade screwdriver.
Antistatic safeguards.
Caution
Most PCAS (Printed Circuit Assemblies) contain components that are sensitive
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to damage by electrostatic discharge. When you remove, instil, or handle any
of these assemblies, be sure to use protective measures including static-free
workstations and personal grounding devices such as the antistatic wrist strap and
grounding mat included in the Electrically Conductive Field Service Grounding
Kit (HP 9300-0933). Follow dl recommended antistatic procedures.
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