Sharp AR-M550 (serv.man12) Service Manual ▷ View online
AR-M550/M620 DETAILS OF EACH SECTION 6 - 116
4) Disconnect the connector, and remove the SPF document length
detector 1 (A) and the SPF document length detector 2 (B).
5) Remove the rotation tray unit.
6) Remove the SPF document size (width) detection analog data
detector.
b-1. SPF paper tray lift motor
1) Remove the rear cover. (See “a-1. Cabinet” in the previous sec-
tion, “[External outfit section]”)
2) Remove the SPF paper tray lift motor.
b-2. SPF paper tray lower limit detector
b-3. SPF document empty detector
1) Remove the cabinet. (See “a-1. Cabinet” in the previous section,
“[External outfit section]”)
2) Remove the document tray unit. (See “a. Document tray unit” in
this section)
3) Disconnect the connector, and remove the SPF paper tray lower
limit detector (A) and the SPF document empty detector (B).
A
B
A
B
AR-M550/M620 DETAILS OF EACH SECTION 6 - 117
[Paper feed/transport section]
A. Major parts and signal functions
SPPD1
GND
1
3
2
2
GND
9
24V3
SPPD1
GND
2
B3B-PH-K-S
B3B-PH-K-S
/SPFC
GND
11
8
SPED1
2
1
1
STUD
1
SCOV
3
PHNR-2-H
+BU2P-TR-P-H
+BU2P-TR-P-H
5V2
/SPFC
1
2
B14B-PH-K-S
GND
5V2
5V2
13
3
2
SCOV
5V2
STUD
7
B3B-PH-K-S
SPED1
2
5V2
1
14
1
5
12
3
24V3
4
6
10
3
B3B-PH-K-S
CN5
5V2
GND
5V2
GND
5V2
GND
PHNR-2-H
SPF PWB
/SPFMA1
/SPFMB1
B12B-PH-K-S
SPFMB1
/SPFMA2
SPFMA1
SPFMA2
24V3
SPFMB2
24V3
24V3
/SPFMB2
CN1
24V3
5
4
4
SMR-06V-N
3
1
24V3
6
24V3
(SPFMB1)
(/SPFMB1)
(/SPFMA1)
(SPFMA1)
2
11
10
10
12
9
7
8
5
4
3
4
3
1
6
2
1
6
4
5
3
2
2
SMP-06V-NC
SCOV
SPPD1
SPFC
SPED1
STUD
SPFM
25
12
30
10
CN3
2
27
26
18
22
29
3
13
5
17
9
20
14
19
1
6
16
11
7
15
4
8
23
28
21
B34B-PHDSS-B
24
PHNR-2-H
+BU2P-TR-P-H
+BU2P-TR-P-H
PHNR-3-H
+BU3P-TR-P-H
+BU3P-TR-P-H
N.C
2
PHNR-3-H
2
1
2
24V3
1
24V3
/STRC
/STRBC
2
3
1
3
1
PHNR-2-H
34
31
33
32
GND
GND
GND
OUT SLUMA
/SRRBC
24V3 PM
24V3 SRRBC
GND
GND
GND
GND
OUT /SLUMA
24V3 STRC
N.C
5V2
GND
5VPOD
24V3 SRRC
5V2
VAREF
N.C
/SRRC
/STRBC
GND
5V2
5V2
OUT SLUMB
GND
/STRC
OUT /SLUMB
GND
5V2
5V2
24V3 STRBC
24V3 FAN
5V2
5V2
GND
SPPD2
1
4
3
CN4
B4B-PH-K-S
B4B-PH-K-S
SPPD2
GND
GND
2
N.C
5V2
B3B-PH-K-S
2
1
1
3
STRC
SPPD2
STRBC
25
12
30
10
CN3
2
27
26
18
22
29
3
13
5
17
9
20
14
19
1
6
16
11
7
15
4
8
23
28
21
B34B-PHDSS-B
24
1
N.C
1
/SRRBC
24V3
24V3
1
PHNR-2-H
+BU2P-TR-P-H
+BU2P-TR-P-H
PHNR-3-H
2
PHNR-2-H
3
2
PHNR-3-H
+BU3P-TR-P-H
+BU3P-TR-P-H
3
1
2
/SRRC
2
34
31
33
32
GND
GND
GND
OUT SLUMA
/SRRBC
24V3 PM
24V3 SRRBC
GND
GND
GND
GND
OUT /SLUMA
24V3 STRC
N.C
5V2
GND
5VPOD
24V3 SRRC
5V2
VAREF
N.C
/SRRC
/STRBC
GND
5V2
5V2
OUT SLUMB
GND
/STRC
OUT /SLUMB
GND
5V2
5V2
24V3 STRBC
24V3 FAN
5V2
STRRC
STRRBC
Code
Signal
name
Name
Function/Operation
Type
Model
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
STRRC
SRRC
SPF NO.1 resist roller clutch
SPF resist roller ON/OFF control
Electromagnetic clutch
STRRBC
SRRBC
SPF No. 1 resist roller brake clutch
SPF resist roller braking
Electromagnetic clutch
STRC
STRC
SPF paper transport roller 2 clutch
SPF transport roller 2 ON/OFF control
Electromagnetic clutch
STRBC
STRBC
SPF paper transport roller 2 brake
clutch
clutch
SPF transport roller 2 braking
Electromagnetic clutch
SPED1
SPED1
SPF document upper limit detector
SPF document upper limit detection
Transmission type
Sensor
SPPD1
SPPD1
SPF document paper pass detector
1
1
SPF document paper pass detection 1
Transmission type
Sensor
SPPD2
SPPD2
SPF document paper pass detector
2
2
SPF document paper pass detection 2
Transmission type
Sensor
STUD
STUD
SPF document tray upper limit
detector
detector
SPF document tray upper limit detection
Transmission type
Sensor
AR-M550/M620 DETAILS OF EACH SECTION 6 - 118
B. 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.
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 docu-
ment exit tray by the paper exit roller.
position are synchronized. The document is transported to the scan
section. After being scanned, the document discharged to the docu-
ment 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.
and the scan magnification ratio as shown below.
C. Maintenance and parts replacement
(1) Maintenance list
✕
: Check (Clean, replace, or adjust as necessary.)
❍
: Clean
▲
: Replace
∆
: Adjust
✩
: Lubricate
❏
: Shift position
Scan mode
Magnification ratio
Document transport
speed
Single surface scan
Up to 117%
360mm/sec
Single surface scan
118% or above
220mm/sec
Duplex scan
Up to 100%
220mm/sec
Duplex scan
101% or above
110mm/sec
AR-M550U/M550N (PM: 250K)
When
calling
250K 500K 750K 1000K 1250K 1500K 1750K 2000K
Remark
AR-620U/M620N (PM: 300k)
300K 600K 900K 1200K 1500K 1800K 2100K 2400K
Unit name
No.
Part name
SPF
Document
feed/
transport
section
feed/
transport
section
1
Document feed roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
(Note 1)
2
Paper pickup roller (SPF)
❍
❍
❍
❍
❍
❍
❍
❍
❍
(Note 1)
3
Separation roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
(Note 1)
4
No. 1 resist roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
5
Torque limiter
✕
✕
✕
✕
✕
✕
✕
✕
(Note 1)
6
Transport roller 1
❍
❍
❍
❍
❍
❍
❍
❍
❍
7
Transport roller 2
❍
❍
❍
❍
❍
❍
❍
❍
❍
(Note 1)
Replacement reference: For replacement, refer to each paper feed port counter value.
DSPF section : 100K or 1 year
2
6
4
7
1
3
5
AR-M550/M620 DETAILS OF EACH SECTION 6 - 119
(2) Maintenance and parts replacement
(Replacement parts)
a. Paper feed unit
1)
Remove the cabinet.
(See “a-1. Cabinet” in the previous section,
“[External outfit section]”)
2) Disconnect the connector, and remove the paper feed unit.
a-1. Paper feed roller
a-2. Pickup roller
1) Pull up the lever and open the upper cover.
2) Remove the roller cover.
3) Remove the pawl and remove the rollers.
No.
Unit
Parts
a
Paper feed
unit
unit
1
Document feed roller
❍
2
Pickup roller
❍
3
SPF paper feed clutch
4
SPF document tray upper limit
detector
detector
5
SPF document upper limit
detector
detector
6
SPF cover switch
7
SPF document paper pass
detector 1
detector 1
b
1
Separation roller
❍
2
SPF paper feed/paper transport
motor
motor
3
SPF resist roller brake clutch
4
SPF resist roller clutch
5
No. 1 resist roller (Drive)
❍
6
Torque limiter
✕
7
SPF paper transport roller 2
brake clutch
brake clutch
8
SPF paper transport roller 2
clutch
clutch
9
Transfer roller 2 (Drive)
❍
10
Transport roller 1 (Drive)
❍
11
SPF document paper pass
detector 2
detector 2
a
a-1
a-2 a-4 a-5 a-6 a-7 a-3
b-1
b-2
b-4
b-7
b-6
b-8
b-5
b-9
b-10
b-11
b-3
A
B
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