Read Sharp MX-6500N / MX-7500N (serv.man27) Service Manual online
MX-7500N OPERATIONAL DESCRIPTIONS 13 – 8
B. Operational descriptions
(1)
Document size detection
Size detection on the document tray
The document size is detected by the DSPF document width sen-
sor (SPWS), and the document length is detected by the DSPF
document length sensors (SPLS1, SPLS2). The document size is
judged from the document width and the document length as
shown in the table below.
sor (SPWS), and the document length is detected by the DSPF
document length sensors (SPLS1, SPLS2). The document size is
judged from the document width and the document length as
shown in the table below.
When, however, documents of different sizes are mixed and set on
the document tray, the largest size is detected.
the document tray, the largest size is detected.
(2)
Timing chart
To increase the document replacement speed, pre-feed of the second and the later documents is performed for documents of A4/Letter or
smaller sizes. Therefore, a clutch is provided for each transport roller to perform individual control.
smaller sizes. Therefore, a clutch is provided for each transport roller to perform individual control.
Document size
Document length sensor
SPLS1
SPLS2
AB series
A5
OFF
OFF
B5
OFF
OFF
11" x 8.5"
OFF
OFF
A4
OFF
OFF
B5R
ON
OFF
A4R
ON
OFF
8.5" x 13"
ON
ON
B4
ON
ON
A3
ON
ON
11" x 17"
ON
ON
8.5" x 14"
ON
ON
8.5" x 13.4"
ON
ON
8.5" x 13.5"
ON
ON
Inch series
8.5" x 5.5"
OFF
OFF
11" x 8.5"
OFF
OFF
A4
OFF
OFF
11" x 8.5"R
ON
OFF
8.5" x 13"
ON
ON
8.5" x 14"
ON
ON
A3
ON
ON
11" x 17"
ON
ON
8.5" x 13.4"
ON
ON
SPWS
SPLS1
SPLS2
Copy key ON
SPFM
DSPF transport motor
DSPF transport motor
SPOM
DSPF document exit motor
DSPF document exit motor
SPUM
DSPF document feed motor
DSPF document feed motor
SPFC
DSPF document feed clutch
DSPF document feed clutch
DSPF No.1 registration roller
clutch
clutch
STRRC
STRC
DSPF transport roller clutch
DSPF transport roller clutch
SRRC
DSPF No.2 registration roller
clutch
DSPF No.2 registration roller
clutch
SPRDMD
DSPF document random sensor
DSPF document random sensor
SPOD
DSPF document exit sensor
DSPF document exit sensor
SPPD4
DSPF document pass sensor 4
DSPF document pass sensor 4
SPPD5
DSPF document pass sensor 5
DSPF document pass sensor 5
SPPD1
DSPF document pass sensor 1
DSPF document pass sensor 1
DSPF document pass sensor 2
SPPD2
SPPD3
DSPF document pass sensor 3
DSPF document pass sensor 3
Scan transport speed 372mm/s 400dpi letter single transport
ON simultaneously with print start of each motor
OFF at 500ms after SPOD OFF of the last paper
OFF at 500ms after SPOD OFF of the last paper
Decelerates simultaneously with turning off SPOD to
reduce to 200mm/s for 18.9mm. Drives for 15mm,
and returns to 372mm/s for 18.9mm.
(Common to all the paper sizes)
reduce to 200mm/s for 18.9mm. Drives for 15mm,
and returns to 372mm/s for 18.9mm.
(Common to all the paper sizes)
ON simultaneously with SPPD2_ON
OFF at
OFF at
25.7
ms after SPPD2_OFF
ON at 12.3mm - 10ms (29ms) after SPPD3 ON (SIM adjustment)
OFF at 10.4mm (28ms) after SPPD3 OFF
OFF at 10.4mm (28ms) after SPPD3 OFF
1
0
1
1
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