Sharp MX-3050N / MX-3060N / MX-3070N / MX-3550N / MX-3560N / MX-3570N / MX-4050N / MX-4060N / MX-4070N (serv.man5) Service Manual ▷ View online
MX-4070N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 7
5. DSPF
A. Rollers
No.
Name
Function and operation
1
Pickup roller
Picks up document and feed it to the document feed roller
2
Document feed roller
Perform the document feed operation of documents
3
Separation roller
Separate a document to prevent against double feed
4
Transport roller 1 (Drive)
Transports document from paper feed roller to transport roller 2
5
Transport roller 1 (Idle)
Applied a pressure to document and the transport roller, and provides transport power of the transport roller to
document
document
6
Transport roller 2 (Drive)
Transports document from transport roller to registration roller
7
Transport roller 2 (Idle)
Applied a pressure to document and the transport roller, and provides the transport power of the transport roller to
document
document
8
Registration roller (Drive)
Performs resist of document transport
9
Registration roller (Idle)
Applies a pressure to document and the registration roller, and provides transport power of the registration roller to
document
document
10
Transport roller 3 (Drive)
Transports document from the No.1 scan section to the transport roller 4
11
Transport roller 3 (Idle)
Applies a pressure to document and the transport roller and provides transport power of the transport roller to
document
document
12
Transport roller 4 (Drive)
Transports document from the transport roller 3 to the document exit roller
13
Transport roller 4 (Idle)
Applies a pressure to document and the transport roller and provides transport power of the transport roller to
document
document
14
Document exit roller (Drive)
Discharges document
15
Document exit roller (Idle)
Applies a pressure to document and the document exit roller and provides transport power of the document exit
roller to document
roller to document
1
2
3
5
4
7
6
9
8
10 11
12 13
14 15
MX-4070N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 8
B. Sensors and switches
Signal name
Name
Type
Function and Operation
SCOV
Upper door open/close sensor
Transmission type
Detects open/close of the upper door
SLCOV
Lower door open/close sensor
Micro switch
Detects open/close of the lower door
SOCD
DSPF open/close sensor
Transmission type
Detects open/close of the DSPF unit
SPED1
Document empty sensor
Transmission type
Detects document empty in the document feed tray
SPED2
Document empty sensor
Transmission type
Detects document empty in the document feed tray
SPLS1
Document length detection short sensor
Transmission type
Detects the document length of the document feed tray upper
SPLS2
Document length detection long sensor
Transmission type
Detects the document length of the document feed tray upper
SPOD
Document exit sensor
Transmission type
Detects document exit of the document
SPPD1
Document pass sensor 1
Transmission type
Detects pass of the document
SPPD2
Document pass sensor 2
Reflection type
Detects pass of the document
SPPD3
Document pass sensor 3
Transmission type
Detects pass of the document
SPPD4
Document pass sensor 4
Transmission type
Detects pass of the document
SPPD5
Document pass sensor 5
Transmission type
Detects pass of the document
SPRDMD
Document random sensor
Transmission type
Detects the document size in random document feed
SPWS
Document width sensor
Volume type resistor
Detects the document width of the document feed tray upper
STLD
Document feed tray lower limit sensor
Transmission type
Detects the lower limit of the document feed tray
STUD
Document feed tray upper limit sensor
Transmission type
Detects the upper limit of the document feed tray
SCOV
SLCOV
SOCD
SPLS1
SPWS
SPLS2
SPED2
SPOD
SPPD1
SPPD2
SPPD3
SPPD4
SPPD5
SPRDMD
STLD
STUD
SPED1
MX-4070N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 9
C. Motors/Clutches/PWB/Lamps/Fan
Signal name
Name
Type
Function and operation
SLUM
Lift up motor
PM step motor
Lifts up or moves down the document feed tray
SPFC
Document feed clutch
Electromagnetic clutch
Controls ON/OFF of the rollers in the document feed section
SPFFAN
Cooling fan motor
DC brushless motor
Cools the motors and the clutches
SPOM
Document exit motor
PM step motor
Drives the document exit roller
SPUFM
Transport motor
DC brushless motor
Drives the transport roller
SRRC
Registration roller clutch
Electromagnetic clutch
Controls ON/OFF of registration roller
STRC
Transport roller 2 clutch
Electromagnetic clutch
Controls ON/OFF of the transport roller 2
STRRC
Transport roller 1 clutch
Electromagnetic clutch
Controls ON/OFF of the transport roller 1
Name
Function and operation
DSPF cnt PWB
Controls the image data process and all the DSPF
CCD PWB
Scans document images and perform A/D conversion of the scanning signal
LED PWB
Radiates light onto a document for the CCD to scan the document image
SLUM
SPOM
SPFC
STRC
STRRC
SRRC
SPUFM
SPFFAN
CCD PWB
DSPF cnt PWB
LED PWB
MX-4070N EXTERNAL VIEW AND INTERNAL STRUCTURE 4 – 10
6. RSPF
A. Rollers
No.
Name
Function and operation
1
Pickup roller
Picks up document and feed it to the document feed roller
2
Document feed roller
Feeds a document to the transport section. Makes a buckle on paper between the registration roller and this roller
to correct the start position of document skew and document image scan
to correct the start position of document skew and document image scan
3
Separation roller
Separates a document to prevent double-feeding
4
Registration roller (Drive)
Transports a document to the transport roller 1 / Controls the transport timing of the document and adjusts the
document scanning timing
document scanning timing
5
Registration roller (Idle)
Apply a pressure to a document and the registration roller to provide the transport power of the transport roller to
the document
the document
6
Transport roller 1 (Drive)
Transports a document transported from the registration roller to the document scanning section
7
Transport roller 1 (Idle)
Apply a pressure to a document and the transport roller to provide the transport power of the transport roller to the
document
document
8
Transport roller 2 (Drive)
Transports a document transported from the document scanning section to the paper exit roller
9
Transport roller 2 (Idle)
Apply a pressure to a document and the transport roller to provide the transport power of the transport roller to the
document
document
10
Paper exit roller (Drive)
Discharges a document. Switchbacks the document and transports it to the registration roller when scanning the
back surface
back surface
11
Paper exit roller (Idle)
Apply a pressure to a document and the paper exit roller to provide the transport power of the paper exit roller to
the document
the document
1
2
3
5
4
7
6
8
9
10 11
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