HP 4550 Service Manual - Page 104
Introduction, DC controller subsystem
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Introduction This section presents the theory of operation and the functional overview for HP Color LaserJet 4500 series and 4550 series printers. It provides the service representative with an understanding of the printing process. This chapter is also the course material for the Service Authorization class and discusses the following printing functions: Basic operation Image formation Toner density Mechanical system Paper path DC controller subsystem Motors and fans Formatter system Power supplies Toner level sensing system 102 Theory of operation C7085-90921
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102
Theory of operation
C7085-90921
Introduction
This section presents the theory of operation and the functional overview for HP Color LaserJet
4500 series and 4550 series printers. It provides the service representative with an understanding
of the printing process.
This chapter is also the course material for the Service Authorization class and discusses the
following printing functions:
Basic operation
Image formation
Toner density
Mechanical system
Paper path
DC controller subsystem
Motors and fans
Formatter system
Power supplies
Toner level sensing system