Read Sharp MX-6500N / MX-7500N (serv.man18) Service Manual online
MX-7500N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 5
3. DSPF
A. Rollers
B. Sensors, detectors, and switches
No.
Name
Function/Operation
1
Document pickup roller (DSPF)
Picks up a document to feed it to the paper feed roller.
2
Paper feed roller (DSPF)
Feeds a document to the transport section.
3
Separation roller (DSPF)
Separates a document to prevent double-feeding.
4
No. 1 registration roller (Drive) (DSPF)
Provides deflection between the paper feed roller and this roller to correct the document skew.
5
No. 1 registration roller (Idle) (DSPF)
Applied a pressure to document and the registration roller, and provides transport power of the
registration roller to document.
registration roller to document.
6
Transport roller 1 (Drive) (DSPF)
Transports document from No. 1 registration roller to No. 2 registration roller.
7
Transport roller 1 (Idle) (DSPF)
Apply a pressure to a document and the transport roller to provide the transport power of the
transport roller to the document.
transport roller to the document.
8
No. 2 registration roller (Drive) (DSPF)
Controls the transport timing of the document and adjusts the document scanning timing.
9
No. 2 registration roller (Idle) (DSPF)
Applied a pressure to document and the registration roller, and provides transport power of the
registration roller to document.
registration roller to document.
10
Transport roller 2 (Drive) (DSPF)
Transports document from the No. 1 scan section to the No. 2 scan section.
11
Transport roller 2 (Idle) (DSPF)
Apply a pressure to a document and the transport roller to provide the transport power of the
transport roller to the document.
transport roller to the document.
12
Transport roller 3 (Drive) (DSPF)
Transports document from the transport roller 2 to the document exit roller.
13
Transport roller 3 (Idle) (DSPF)
Apply a pressure to a document and the transport roller to provide the transport power of the
transport roller to the document.
transport roller to the document.
14
Paper exit roller (Drive) (DSPF)
Discharges document.
15
Paper exit roller (Idle) (DSPF)
Apply a pressure to a document and the paper exit roller to provide the transport power of the
paper exit roller to the document.
paper exit roller to the document.
Signal name
Name
Type
Function/Operation
SCOV
Upper cover open/close detector (DSPF)
Light transmission
Detects open/close of the upper cover.
SLCOV
Lower cover open/close detector (DSPF)
Micro switch
Detects open/close of the lower cover.
SOCD
DSPF open/close detector (DSPF)
Light transmission
Detects open/close of the DSPF unit.
SPED1
Document upper limit detector (DSPF)
Light transmission
Detects the upper limit lift position of a document in the document feed
tray.
tray.
SPED2
Document detector (DSPF)
Light transmission
Detects documents on the document feed tray.
SPLS1
Document length detector 1 (DSPF)
Light transmission
Detects the document length on the document feed tray. (For short sizes)
SPLS2
Document length detector 2 (DSPF)
Light transmission
Detects the document length on the document feed tray. (For long sizes)
SPOD
Document exit detector (DSPF)
Light transmission
Detects document exit of the document.
SPPD1
Document pass sensor 1 (DSPF)
Light transmission
Detects document pass in front of the No. 1 registration roller.
3
9
1
2
5
7
4
6
10
12
14
8
11
13
15
SPPD2
SPPD2
SPPD1
SPPD1
SCOV
SCOV
SPRDMD
SPRDMD STUD
STUD
SPPD3
SPPD3
SPPD4
SPPD4
SOCD
SOCD
SLCOV
SLCOV
SPPD5
SPPD5
SPOD
SPOD
SPED2
SPED2
STLD
STLD
SPED1
SPED1
SPWS
SPWS
SPLS1
SPLS1
SPLS2
SPLS2
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