Sharp AR-M351N / AR-M451N (serv.man4) Service Manual ▷ View online
AR-M351N/M451N MAINTENANCE AND DETAILS OF EACH SECTION 7 - 56
C. Operational descriptions
(1) 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.
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.
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.
mode and the scan magnification ratio as shown below.
1
2
5
7
8
10
12
3
4
6
9
11
Code
Signal
name
Name
Function/Operation
Type
Note
SCOV
SCOV
SPF cover switch
SPF cover open/close detection
Transmission type
Sensor
SPFM
SPFM1
SPF paper feed motor, paper
transport motor
transport motor
Drives the paper feed roller and the
transport roller. (SPF)
transport roller. (SPF)
Stepping motor
SPFC
SPFC
SPF paper feed clutch
SPF paper feed section roller ON/OFF
control
control
Electromagnetic clutch
SRRC
SRRC
SPF resist roller clutch
SPF resist roller ON/OFF control
Electromagnetic clutch
SPED
SPED
SPF document set detector
SPF document presence detection
Transmission type
Sensor
SPPD
SPPD
SPF document paper pass detector SPF document paper pass detection 1
Transmission type
Sensor
SPFS
SPFS
SPF document pickup solenoid
SPF document pickup
Solenoid
STMP
STMP
FAX finish stamp solenoid
Drives the FAX document finish stamp.
Solenoid
SPLS1
SPLS1
SPF document length detector 1
SPF document length detection (Short)
Transmission type
Sensor
SPLS2
SPLS2
SPF document length detector 2
SPF document length detection (Long)
Transmission type
Sensor
SPFVR
SPFVR
SPF document size (Width)
detection analog data detector
detection analog data detector
SPF document size (Width) detection
Volume resistor
Other
detector
detector
SOCD
SOCD
SPF open/close detector
SPF unit open/close detection
Transmission type
Sensor
SPOD
SPOD
SPF paper exit detector
SPF paper exit detection
Transmission type
Sensor
No.
Name
Function
1
CIS unit
(AR-EF3 only)
(AR-EF3 only)
This is an image sensor unit to scan the back of a document. An image sensor (CIS: Contact
Image Sensor) of 7,196 pixels is employed. The scan resolution is 600dppi.LED lights in the
unit are reflected onto the document. Lights reflected from the document are passed through
the lens to form images on the photoelectric conversion elements.
The photo energy is converted into electric energy.
Image Sensor) of 7,196 pixels is employed. The scan resolution is 600dppi.LED lights in the
unit are reflected onto the document. Lights reflected from the document are passed through
the lens to form images on the photoelectric conversion elements.
The photo energy is converted into electric energy.
2
Document resist roller
This roller makes synchronization between the document lead edge and the scan start
position.
position.
3
Document resist front sensor
(SPPD)
(SPPD)
Detects that a document reaches the resist roller.
4
Document set sensor
Detects that a document is set on the tray.
5
Document feed roller
Feeds documents.
6
Separation plate
The rubber plate prevents against duplicated feed of documents.
7
Document length sensor
(SPLS1/SPLS2)
(SPLS1/SPLS2)
Detects the document length to detect the document size.
8
Document width detection volume
Detects the document width to detect the document guide.
9
SPF motor
Transports a document in the SPF.
10
Document take-up roller
Picks up a document and transport it to the document feed roller.
11
Document exit roller
Discharges a document.
12
Document exit sensor (SPOD)
Detects document exit.
Scan mode
Magnification ratio
Document
transport speed
Single surface scan/
Duplex scan
Duplex scan
100% or above
220mm/sec
Single surface scan/
Duplex scan
Duplex scan
101% or above
110mm/sec
High image quality
110mm/sec
FAX
167.1mm/sec
AR-M351N/M451N MAINTENANCE AND DETAILS OF EACH SECTION 7 - 57
D. Maintenance and parts replacement
(1) Maintenance list
(2) Maintenance and parts replacement
Unit name
No.
Part name
When
calling
100K
200K
300K
400K
500K
600K
700K
800K
Remark
DSPF
section
section
1
Pick-up roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
Note 2
2
Paper feed roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
Note 2
3
Separation mylar lower
❍
❍
❍
❍
❍
❍
❍
❍
❍
Note 2
4
Separation pad
❍
❍
❍
❍
❍
❍
❍
❍
❍
Note 2
5
PS roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
6
Paper exit roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
7
Sensors
❍
❍
❍
❍
❍
❍
❍
❍
For cleaning, blow air.
Note 2: Replacement reference: Replace by using the SPF counter value as an indication.
Paper feed section pickup roller, paper feed roller, separation pad, separation lower mylar lower:
100K or 1 year
100K or 1 year
3
7
6
7
4
1
2
5
7
No.
Unit
Parts
a
SPF unit
1
SPF document stopper solenoid
2
SPF document resist front
sensor
sensor
3
SPF paper feed cover sensor
4
SPF document set sensor
5
SPF control PWB
6
SPF original length sensor 1
7
SPF original length sensor 2
8
SPF original width detection
volume PWB
volume PWB
9
Pick-up roller
❍
10
Paper feed roller
❍
11
CIS unit
12
CIS control PWB
13
SPF open sensor
14
SPF original exit sensor
15
Paper exit roller
❍
16
SPF motor
17
Resist roller
18
Resist roller clutch
19
SPF original paper feed solenoid
20
SPF original paper feed clutch
21
Separation mylar lower
❍
22
Separation pad
❍
a-21
a-22
a-14
a-15
a-3
a-11
a-16
a-1
a-19
a-12
a-5
a-6
a-7
a-10
a-9
a-2
a-4
a-18
a-20
a-8
a-17
a-13
AR-M351N/M451N MAINTENANCE AND DETAILS OF EACH SECTION 7 - 58
a. SPF unit
1) Remove the rear cabinet of the scanner section.
2) Disconnect the connector.
3) Disconnect the grounding wire.
4) Slide the SPF unit to the bottom, then remove it.
a-1. SPF document stopper solenoid
1) Remove the upper transport unit cover.
2) Remove the stopper solenoid.
a-2. SPF document resist front sensor
a-3. SPF paper feed cover sensor
a-4. SPF document set sensor
1) Remove the upper transport unit cover.
2) Remove the sensors.
a-5. SPF control PWB
1) Remove the SPF PWB, and remove the SPF control PWB.
1)
1)
2)
3)
3)
4)
5)
5)
5)
6)
7)
AR-EF3
2)
3)
4)
2)
1)
1)
2)
1)
1)
1)
2)
1)
2)
3)
4)
3)
4)
3)
4)
1)
2)
3)
3)
3)
4)
5)
4)
4)
AR-M351N/M451N MAINTENANCE AND DETAILS OF EACH SECTION 7 - 59
a-6. SPF original length sensor 1
a-7. SPF original length sensor 2
1) Remove the OC cover.
2) Remove the original length sensor cover, and remove the sen-
sor.
a-8. SPF original width detection volume PWB
1) Remove the OC cover.
2) Remove the original length sensor cover.
3) Remove the volume cover and remove the volume.
(SPF original width detection volume installation)
<1> Extend the original guide to the maximum position.
<2> Adjust so that the mark on the width detection pinion gear is
fitted with the mark on the volume mounting plate.
<3> Fix the mounting plate with the screw.
∗
When the rotational volume sensor is replaced, the sensor value
must be adjusted to the paper size (mark on the tray).
(Refer to the SIM 53-6 or 53-7.)
must be adjusted to the paper size (mark on the tray).
(Refer to the SIM 53-6 or 53-7.)
a-9. Pick-up roller
a-10. Paper feed roller
1) Remove the upper transport unit cover.
2) Remove the paper feed roller cover.
3) Remove the hook of each roller, and remove each roller.
1)
1)
2)
3)
4)
3)
1)
1)
2)
3)
3)
4)
4)
1)
1)
2)
3)
4)
1)
2)
3)
4)
Click on the first or last page to see other AR-M351N / AR-M451N (serv.man4) service manuals if exist.