Sharp AR-RF3 (serv.man2) Service Manual ▷ View online
AR-RF3 EXTERIOR/INTERIOR STRUCTURE 3 - 1
[3] EXTERIOR/INTERIOR STRUCTURE
1. Part names and functions
A. Exterior
B. Motors and solenoids
No.
Name
Function/operation
1
Original reminder indication lamp
Flashes when original is left on the copy glass after copying has been completed.
2
Original feed cover
Open the cover to resolve document jams.
3
Original guide
Guide for smooth transfer of original. Set it to the width of the original.
4
Original platform
Set the original here for automatic transport and copying.
5
Original exit section cover
Open the cover to resolve document jams.
6
Original exit section
The original emerges from here after being scanned.
7
Original transport cover
—
8
Original platform (copy glass)
Documents which cannot be copied using the original platform can be placed here and copied.
No.
Name
Code
Function/operation
1
Document feed motor
DFM
Feeds original from the tray.
2
Transport motor
DTM
Transports original from the copy glass.
3
Delivery motor
DEM
Reverses or discharges the original.
4
Reverse solenoid
DRSOL
Switches the flapper during duplex operation.
1
2
3
4
5
7
8
6
4
1
2
3
AR-RF3 EXTERIOR/INTERIOR STRUCTURE 3 - 2
C. PWB
D. Sensors
No.
Name
Function/operation
1
LED PWB
LED display
2
Main PWB
Controls and drives RADF.
No.
Name
Code
Type
Function/operation
Output
1
Tray original length sensor 2
DLS2
Photo interrupter
Detects length of original in tray (long originals)
TP3 becomes HIGH when original is detected.
2
Tray original length sensor 1
DLS1
Photo interrupter
Detects length of original in tray (short originals)
TP2 becomes HIGH when original is detected.
3
Original width detector
volume
volume
DWVR
Volume
Detects width of original in tray
TP1 voltage changes within range of 0 to 5V
depending on width of original.
depending on width of original.
4
ADF front open sensor
FOS
Photo interrupter
ADF open/closed status sensor
TP18 becomes HIGH when ADF is open.
5
Empty sensor
EMPS
Photo interrupter
Detects the presence of an original in document
feed tray
feed tray
TP5 becomes LOW when an original is
detected.
detected.
6
Timing sensor
TIMS
Reflection sensor
Detects when the original has been transported
as far as the timing sensor section
as far as the timing sensor section
TP11 becomes 1V or lower when an original is
detected.
detected.
7
Resist sensor
REGS
Reflection sensor
Detects when the original has been transported
as far as the resist sensor section
as far as the resist sensor section
TP8 becomes 1V or lower when an original is
detected.
detected.
8
Document feed open sensor
DFOS
Photo interrupter
Detects the open/closed status of document feed
cover
cover
TP4 becomes HIGH when the cover is open.
9
Document feed open switch
DFSW
Microswitch
Detects the open/closed status of document feed
cover
cover
Pin 2 on CN11 becomes 24V when the cover
is open (when ADF is closed).
is open (when ADF is closed).
10
Document exit open sensor
DEOS
Photo interrupter
Detects the open/closed status of the document
exit cover
exit cover
TP17 becomes HIGH when the cover is open.
11
ADF open switch
AOSW
Microswitch
Detects the open/closed status of the ADF
TP47 becomes HIGH when the cover is open.
12
Reverse sensor
DRS
Reflection sensor
Detects when the original has been transported
as far as the reverse sensor section
as far as the reverse sensor section
TP14 becomes 1V or lower when the original is
detected.
detected.
13
Document exit sensor
DES
Photo interrupter
Detects when the original has been transported
as far as the document exit sensor section
as far as the document exit sensor section
TP16 becomes HIGH when an original is
detected.
detected.
1
2
4
9
5
7
8
6
11
10
12
13
1
2
3
AR-RF3 EXTERIOR/INTERIOR STRUCTURE 3 - 3
E. Cross-section diagram
No.
Name
Function/operation
1
Pickup roller
Picks up the document.
2
Document feed roller
Presses document onto the separation pad to feed.
3
Separation pad
Separates document.
4
Resist roller
Corrects paper skew and transports document.
5
Idle roller
The follower roller which is pressed onto the resist roller.
6
Belt roller L
Drive roller of DF belt.
7
Idle roller
Presses DF belt onto the platen glass.
8
DF belt
Transports document on the platen glass.
9
Idle roller
Presses DF belt onto the platen glass.
10
Belt roller R
The follower roller which is pressed onto the resist roller.
11
Reverse roller
Reverses document or discharges document.
1
2
3
4
5
6
7
8
9
10
11
AR-RF3 MACHINE OPERATIONS 4 - 1
[4] MACHINE OPERATIONS
When original is detected in the original tray, EMPS turns ON (no-output level).
Original size is determined by DWVR, DLS1 and DLS2.
Two operation modes, single-side and duplex, are available.
For single-side, after the print SW is turned ON, DFM rotates in the forward direction and the original is transported. (DTM and DEM forward rotation
begins.)
begins.)
REGS detects the leading edge of the fed original (REGS output level HIGH); the original contacts the resist rollers and stops.
The DFM reverses its rotation direction , the resist rollers rotate, and the document is transported.
The TIMS detects the leading edge of the original, and the DFM turns OFF.
After the DTM and DEM stop, the DTM rotates forward, and the transport belt moves. Or, the DFM reverses its direction of rotation, and the original is
sent to the transport section.
sent to the transport section.
When the TIMS detects the trailing edge of the original, the DFM stops, after which the DTM (transport belt) also stops. After scanning is completed,
the DTM and DEM turn ON, and the original is discharged. After the DES detects the trailing edge of the original, the DTM and DEM turn OFF (stop).
the DTM and DEM turn ON, and the original is discharged. After the DES detects the trailing edge of the original, the DTM and DEM turn OFF (stop).
(3)(11) (7)(10)
(1) (4) (6)
(8) (9)
(12)
1
2
5
6
3
4
7
8
9 10
+5V
DW
R
A
GND
DLS1
A
GND
+5V
+5V
A
GND
DLS2
(NC)
2
1
DRSOL
+24V
CN4 (10pin)
CN10 (2pin)
CN9 (6pin)
CN7 (7pin)
CN8 (6pin)
1
2
+24V
PGND
3
4
+5V
SGND
CN1 (4pin)
6
5
ADS
TXD
4
3
RXD
DTR
2
1
DSR
RESET
CN2 (6pin)
1
2
5
6
3
4
+5V
DRS
A
GND
DES
DRS D
A
+5V
CN3 (9pin)
4
5
11 12
6 10
13 14 15
+5V
A
GND
REGS
REGS D
A
EMPS
+5V
+5V
TIMS
TIMS D
A
CN5 (15pin)
RADF CONTROL PWB
MFP PWB
1
3
TXD-RADF
RXD-RADF
5
7
DTR-RADF
DSR-RADF
9 11
RES-RADF
13
RADF UP
2
4
+5V
+5V
6
+24V
+5V OP
CN11 (16pin)
8 10
+24V
12
GND
GND
BR
BL
PL
LB
PK
BL
OR
OR
RD
OR
RD
GY
GY
5
FG
11
10
GND
GND
3
7
+24V
1
RADF UP
2
9
+5V OP
RES-RADF
8
DSR-RADF
+5V
(12pin)
12
6
DTR-RADF
4
TXD-RADF
RXD-RADF
5
11
10
3
7
1
2
9
8
12
6
4
3
2
1
+5V
A
GND
DLS2
3
2
1
+5V
DRS
DRS D
A
1
2
5
6
3
4
DEM B\
DEM B
+24V
+24V
DEM A\
DEM A
1
2
5
6
3
4
DFM A
+24V
+24V
DFM B\
DFM A\
DFM B
3
2
1
+5V
A
GND
DLS1
1
2
3
REGS D
A
REGS
+5V
1
2
3
TIMES D
A
TIMS
+5V
1
2
3
EMPS
A
GND
+5V
3
2
1
+5V
A
GND
DLS1
1
2
3
DTM
Transport motor
Transport motor
DFM
Document feed motor
DLS2
Original length sensor 2
Original length sensor 2
DLS1
Original length sensor 1
Original length sensor 1
DWVR
Original volume
Original volume
EMPS
Empty sensor
TIMS
Timing sensor
Timing sensor
DRSOL
Reverse solenoid
Reverse solenoid
DRS
DES
3
2
1
+5V
AGND
DES
3
2
1
1
2
3
+24V
DRSOL
7
6
3
2
5
4
DTM B\
DTM B
(NC)
+24V
DTM A\
DTM A
1
+24V
GY
ELR/P
Connector
Pin No.
Pin No.
Reverse
Delivery
motor
DEM
motor
DEM
Resist sensor
REGS
REGS
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