MX-6240N, MX-7040N (serv.man23). Section 4 External view and Internal Structure - Updated November 2012 - Sharp Copying Equipment Service Manual (repair manual). Page 6

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MX-7040N  EXTERNAL VIEW AND INTERNAL STRUCTURE  4 – 6
C. Drive motors, clutches, PWB’s, and lamps
SPPD2
Document pass sensor 2 (DSPF)
Light transmission
Detects document pass in front of the transport roller 1.
SPPD3
Document pass sensor 3 (DSPF)
Light transmission
Detects document pass in front of the No. 2 registration roller.
SPPD4
Document pass sensor 4 (DSPF)
Light transmission
Detects document pass in front of the front-surface document scan.
SPPD5
Document pass sensor 5 (DSPF)
Light transmission
Detects document pass in front of the bask-surface document scan.
SPRDMD
Document size detector (DSPF)
Light transmission
Outputs the document size judgment signal when feeding random 
documents.
SPWS
Document width sensor (DSPF)
Resistance volume
Detects the document width on the document feed tray.
STLD
Document feed tray lower limit detector 
(DSPF)
Light transmission
Detects the lower limit position of the document feed tray.
STUD
Document feed tray upper limit detector 
(DSPF)
Light transmission
Detects the upper limit position of the document feed tray.
Signal name
Name
Type
Function/Operation
DSPF_COPY_
LAMP
Scanner lamp (DSPF)
LED
Radiates light onto a document for the CCD to scan the document 
image.
SLUM
Document feed tray lift motor (DSPF)
Stepping motor
Lifts the document feed tray.
SPFC
Paper feed clutch (DSPF)
Electromagnetic clutch
Turns ON/OFF the document feed section roller.
SPFFAN
DSPF cooling fan
DC brushless motor
Cools the motors and the clutches in the DSPF section.
SPFM
Transport motor (DSPF)
Stepping motor
Drives the transport roller.
SPOM
Document exit motor (DSPF)
Stepping motor
Drives the document exit roller.
SPUM
Document feed/transport motor (DSPF)
Stepping motor
Drives the paper feed roller and the transport roller.
SRRC
No. 2 registration roller clutch (DSPF)
Electromagnetic clutch
Turns ON/OFF the No. 2 registration roller.
STRC
Transport roller clutch (DSPF)
Electromagnetic clutch
Turns ON/OFF the transport roller 1.
STRRC
No. 1 registration roller clutch (DSPF)
Electromagnetic clutch
Turns ON/OFF the No. 1 registration roller.
No.
Name
Function/Operation
1
Control PWB (DSPF)
Controls the image data process and all the DSPF.
2
Driver PWB (DSPF)
Drives the motors and the clutches in the DSPF section.
3
CCD PWB (DSPF)
Scans document images and performs A/D conversion of the scanning signal.
Signal name
Name
Type
Function/Operation
SPOM
SPUM
SPUM
SPOM
SLUM
SLUM
SPFC
SPFC
STRRC
STRRC
STRC
STRC
SRRC
SRRC
DSPF COPY LUMP
DSPF_COPY_LAMP
SPFFAN
SPFFAN
SPFM
SPFM
1
2
3

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