MX-M700N DSPF SECTION C – 6
C. Document tray lift operation
When a job is started, the document tray is lifted until a document
at the top in the document tray turns on the document upper limit
sensor (STUD).
The pressure between the document at the top in the document
tray and the take-up roller is maintained at a constant level to
improve the paper feed capability.
When paper to be scanned is exhausted, the document empty sen-
sor (SPED1) turns off and the document tray moves down automat-
ically until the lower limit sensor detects it.
Up and down movements of the document tray are performed by
the lift motor (normal rotation, reverse rotation) and the lift gear.
D. Document feed, transport, scan, paper exit,
and operating speed
The document fed by the take-up roller is sent through the paper
feed roller and the transport roller to the resist roller section.
In the resist roller section, the document lead edge and the scan
start position are synchronized.
The document is transported to the scan section. After being
scanned, the document discharged to the document exit tray by the
paper exit roller.
The document transport speed varies depending on the scan mode
and the scan magnification ratio as shown below.
E. The original scan
The CIS (Contact Image Sensor) unit is the contact type image
scan sensor, and is assembled to the DSPF to scan document
images. The LED light in the CIS unit is radiated to a document,
and the reflected light is passed through the lens to the photoelec-
tric conversion elements to form images. (Pixel: 7196 pixels, reso-
lution: 600dpi) The CIS and the CCD assembled in the lens unit
allow simultaneous scan of duplex surfaces of a document.
3. Disassembly and assembly
A. External outfit section
(1) DSPF unit
1) Push down the fixing plate.
2) Remove the rear cover.
3) Remove the harness.
Scanning mode Magnification ratio
Document transport
speed
Single surface scan Up to 117% 360mm/sec
Single surface scan 118% or above 220mm/sec
Duplex scan Up to 100% 220mm/sec
Duplex scan 101% or above 110mm/sec
STLD
SPED1
STUD
No. Unit No. Parts
(1) DSPF unit a Cabinet
b Document mat
(1)-a
(1)
(1)-a(1)-b
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