Sharp MX-M350 Service Manual page 102

12
Signal
Code
name
SCOV SCOV SPF cover switch
SPFM SPFM1 SPF paper feed motor, paper
transport motor
SPFC SPFC SPF paper feed clutch
SRRC SRRC SPF resist roller clutch
SPED SPED SPF document set detector
SPPD SPPD SPF document paper pass detector SPF document paper pass detection 1
SPFS SPFS SPF document pickup solenoid
STMP STMP FAX finish stamp solenoid
SPLS1 SPLS1 SPF document length detector 1
SPLS2 SPLS2 SPF document length detector 2
SPFVR SPFVR SPF document size (Width)
detection analog data detector
SOCD SOCD SPF open/close detector
SPOD SPOD SPF paper exit detector
No. Name
1 CIS unit
2 Document resist roller
3 Document resist front sensor
(SPPD)
4 Document set sensor
5 Document feed roller
6 Separation plate
7 Document length sensor
(SPLS1/SPLS2)
8 Document width detection volume Detects the document width to detect the document guide.
9 SPF motor
10 Document take-up roller
11 Document exit roller
12 Document exit sensor (SPOD)
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.
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.
The document transport speed varies depending on the scan
mode and the scan magnification ratio as shown below.
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 56
4
2 3
9 6
5 10
1
11
Name
SPF cover open/close detection
Drives the paper feed roller and the
transport roller. (SPF)
SPF paper feed section roller ON/OFF
control
SPF resist roller ON/OFF control
SPF document presence detection
SPF document pickup
Drives the FAX document finish stamp.
SPF document length detection (Short)
SPF document length detection (Long)
SPF document size (Width) detection
SPF unit open/close detection
SPF paper exit detection
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.
This roller makes synchronization between the document lead edge and the scan start
position.
Detects that a document reaches the resist roller.
Detects that a document is set on the tray.
Feeds documents.
The rubber plate prevents against duplicated feed of documents.
Detects the document length to detect the document size.
Transports a document in the SPF.
Picks up a document and transport it to the document feed roller.
Discharges a document.
Detects document exit.
7
8
Function/Operation
Function
Scan mode Magnification ratio
Single surface scan/ 100% or above
Duplex scan
Single surface scan/ 101% or above
Duplex scan
High image quality
FAX
Type Note
Transmission type Sensor
Stepping motor
Electromagnetic clutch
Electromagnetic clutch
Transmission type Sensor
Transmission type Sensor
Solenoid
Solenoid
Transmission type Sensor
Transmission type Sensor
Volume resistor Other
detector
Transmission type Sensor
Transmission type Sensor
Document
transport speed
220mm/sec
110mm/sec
110mm/sec
167.1mm/sec