- HP Printer User Manual

ENWW Scanner section 45
MFP unit explanation
M11 (scanner) control
M11 (scanner) is driven by SCDB (scanner
drive board) and is controlled by PRCB
(printer control board).
The related signal is PS61 (scanner HP).
1 Operation
a Operation of M11 (scanner)
M11 (scanner) is a 3-phase stepping
motor driven by the 3-phase bipolar
constant-current drive method. The
motor is turned on/off by
supplying/stopping clock pulses.
The rotational speed, direction, and
amount of movement of M11 is
determined by the increment of the
driving step count. This count is reset
each time PS61 (scanner HP) is turned
on or off by the exposure unit.
b Movement speed of the exposure unit
Scanning speed
c Exposure unit home position search
When SW2 (sub power switch) or the
START button is pressed, M11
(scanner) searches for the home
position of the exposure unit. However,
this operation is performed in different
ways depending on whether PS61
(scanner HP) is on or off.
1 When PS61 (scanner HP) is off
2 When PS61 (scanner HP) is on
d Read with shading correction
Shading correction is performed in
different ways depending on whether
SW2 (sub power) is on or the START
button is on. When shading correction
starts, the exposure unit is at the home
position and PS61 (scanner HP) is off.
1 When SW2 (sub power) is on
L1 (exposure lamp) turns on. Next,
M11 (scanner) moves the exposure
unit toward the paper exit side. After
being driven by the specified number
of steps, M11 stops, thus reading the
light reflected by the white reference
plate installed underneath the glass
stopper plate and performing the first
Operation mode Movement speed
Scan 320 mm/s (1:1)
Return 640 mm/s
Home position search 247 mm/s
PS61
SCDB
S.GND
SIG
5V
M11
U
V
W
PRCB
SCAN CLK
SCAN FR
SCAN MGN
SCAN CUR1
SCAN CUR2
SCAN CUR3
MODE1
MODE2
MODE3
SCANHP PS
DCPS
24V1
5V2
S.GND
P.GND
5V2
S.GND
PS61
Platen APS
read position
PS61
Platen APS
read position