HP LaserJet 1018 - Changing the Pickup Roller

PR1
TRS
DEV
IC902
CPU
DVAC
TRNDC
TRCRNT
TRPDC
PRAC
PRPWM
IC301
IC301IC301
IC301
IC501
Positive voltage
generation circuit
J303
J304
J301
J302
DC voltage
generation
circuit
AC voltage
generation
circuit
DC voltage
generation
circuit
AC voltage
generation
circuit
Combined
Combined
Primary
charging roller
Developing
cylinder
Transfer
charging 
roller
Engine controller PCB
High-voltage power supply circuit
Developing bias circuit
Transfer charging bias circuit
Negative voltage
generation circuit
Photosensitive
drum
Primary charging bias circuit
J201-14J902-10
J201-15J902-9
J201-16J902-8
J201-18J902-6
J201-17J902-7
J201-22J902-2
Power supply PCB
Figure 4-4 High-voltage power supply circuit
Image-formation system
Laser printing requires the interaction of several different technologies, including electronics, optics,
and electrophotographic, to provide a printed page. Each process functions independently and must
be coordinated with the other printer processes. Image formation consists of seven processes, which
are described in the following section.
ENWW Printer functions 45
Download Service Manual And Resetter Printer at http://printer1.blogspot.com