Engine control system
The engine control system coordinates all product functions and drives the other four systems.
The engine control system contains these components:
●
DC controller printer circuit assembly (PCA)
●
High-voltage power supply PCA
●
Low-voltage power supply unit
●
Fuser control
Figure 1-2 Engine control system
Formatter
Engine-control system
DC controller
Low-voltage power supply
Laser scanner system
Image-formation system
Pickup, feed and delivery
system
Accessory
High-voltage power supply
Fuser control
Table 1-1 Sequence of operation
Period Duration Purpose Remarks
WAIT period From the time the power is
turned on until the initial drive
for the main motor is complete
Removes the charge that
creates a potential difference
from the drum surface, and
adjusts the drum phase
Detects cartridge presence
STBY (Standby period) From end of the WAIT or LSTR
period until either the print
command is received from the
formatter or the power is
turned off
Maintains the product in
readiness for a print command
and maintains the heater at a
targeted temperature
INTR (Initial rotation) From the time the print
command is received until the
pickup solenoid is turned on
Prepares the photosensitive
drum for printing and cleans
the transfer charging roller
ENWW Engine control system 3
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