HP LASERJET 9065 User Manual Page 66

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58 MFP unit explanation ENWW
Corona unit section
Composition
Mechanisms Charging control
The current output to the charging wire and
the voltage applied to the grid are supplied
from HV (high voltage unit) and they are
controlled by PRCB (printer control board).
The levels of outputs to these are
transmitted using 8-bit serial data. This serial
data includes the level information for all
outputs driven by HV, excluding the ON/OFF
control signal. Accordingly, a separate signal
line is provided to turn on/off only the
charging wire output and the grid output at
the same time.
PCL
<Charging corona unit> <Transfer and separation corona unit>
Charging control plate
Charging corona wire
Transfer entrance
guide plate
Guide rollers
Transfer
corona
wire
Plunging prevention
plate (rear)
Separation
corona wire
Plunging prevention
plate (front)
Charging wire cleaning
motor (M14)
Mechanism Method
Charging Scorotron (DC negative corona
discharge)
Discharging wire: Tungsten, 0.06 mm
diameter (gold-plated skin path, with
automatic wire cleaner)
Grid control: Gold-plated stainless plate
Transfer DC positive corona discharge
Discharging wire: Oxide film tungsten,
0.06 mm diameter, with automatic wire
cleaner
Separation AC/DC corona discharge
Discharging wire: Oxide film tungsten,
0.06 mm dia., with automatic wire cleaner
PRCB
DCPS
24V2
P.GND
CHARGING
MS1 MS2
HV
C.CONT
EM(C).SIG
TXD
CLK
LATCH
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