Sharp AR-BC320, Service Manual, Page: 88 / 344

AR-BC320 DESCRIPTIONS OF EACH SECTION 7 - 47
9. RADF section
A. Operational descriptions
(1) Electrical section and mechanical section
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.)
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.
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).
(2) Operational descriptions
a. Major parts of the paper feed section
(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 AG
N
D
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 AG
N
D
DLS1
1 2 3
REGS D
A
REGS +5V
1 2 3
TIMES D
A
TIMS +5V
1 2 3
EMPS AG
N
D
+5V
3 2 1
+5V AG
N
D
DLS1
1 2 3
DTM
Transport motor
DFM
Document feed motor
DLS2
Original length sensor 2
DLS1
Original length sensor 1
DWVR
Original volume
EMPS
Empty sensor
TIMS
Timing sensor
DRSOL
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.
Reverse
Delivery
motor
DEM
Resist sensor
REGS
1
2
3
4
5
6 7 8 9 10 11
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.