II-1
CHAPTER II THEORY OF OPERATION
This chapter describes the printer functions, the relationship between the electrical
systems and mechanical systems, and the timing of operations.
Striped conduits (
) indicate mechanical linkages; solid thin arrows ( )
appearing with a signal name indicate the transmission of single control signals and
outlined thick arrows (
) indicate the transmission of groups of signals.
1. BASIC OPERATIONS
1.1 Mechanical Configuration
The printer functions can be divided into four blocks: the laser system, the image
formation system, the paper pick-up/feed system and the control system.
Expansion memory
(SIMM)
Font card
Optional I/O
(MIO)
External Device
Control panel
IMAGE FORMATION SYSTEM
Cleaning unit
Photosensitive drum
Developing
unit
Laser unit
LASER SYSTEM
Transfer
separation
unit
Delivery rollers
Fixing unit
Feeder
Tray 1
Tray 2
(Option)
MP tray
Main PCB
CONTROL SYSTEM
PAPER PICK-UP/FEED SYSTEM
(2 slots)
Figure 2.1
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