Sharp AR-RF3 (serv.man2) Service Manual ▷ View online
AR-RF3 ADJUSTMENTS 6 - 1
[6] ADJUSTMENTS
1. ADF adjustment (skew adjustment)
A. W-RADF hinge section detail
B. Adjustment
1.
First, set an original in the RADF, and copy it in the single-side
mode.
mode.
2.
Examine the image on the copy to determine the deviation from
normal.
normal.
3.
If the image is askew as in (1) or (2), loosen the securing screws
on the right and left hinges, sufficiently loosen the square-hole
screw on the skew adjustment screw tip on the right hinge, and
rotate the adjustment screw in the direction shown in the figure,
only as much as necessary.
on the right and left hinges, sufficiently loosen the square-hole
screw on the skew adjustment screw tip on the right hinge, and
rotate the adjustment screw in the direction shown in the figure,
only as much as necessary.
4.
After adjusting, while using a screwdriver to keep the adjustment
screw from moving, tighten the securing screws on the right and
left hinges.
screw from moving, tighten the securing screws on the right and
left hinges.
(1) If a – b > 0
(2) If a – b < 0
2. Magnet adjustment
Magnet catch adjustment
(Position of the belt unit relative to the copier glass upper surface)
1) Remove the front cover of RADF.
2) With the spacer parts of the belt unit touching the glass surface,
secure the magnet catches to the suction plates with the screws.
Make the gap between the glass surface and each spacer 0.5 mm
or less.
or less.
3. Solenoid adjustment
Reverse flapper solenoid adjustment
1) Remove the front cover of RADF.
2) With the reverse unit positioned as shown in the figure below,
move the BKT-REV-SOL so that the BKT end comes to the exact
center of the engraved markings. After adjusting, tighten the
screws.
center of the engraved markings. After adjusting, tighten the
screws.
4. ADF open position adjustment
Adjust BKT-BA-KAIHEI so that, when the DF is being closed from the
open condition, the microswitch turns ON when the gap between the
copier and BASE-BA-69 (front side, lower surface) is between 30 to 60
mm. Tighten the securing screw.
open condition, the microswitch turns ON when the gap between the
copier and BASE-BA-69 (front side, lower surface) is between 30 to 60
mm. Tighten the securing screw.
B
A
RADF
securing
screw
securing
screw
Right hinge
assembly
assembly
Left hinge
assembly
assembly
RADF
PPC
B
A
Hinge base
Nut
Screw adjustment screw
Right hinge
assembly
assembly
RADF securing screw
(1 mm gradations)
Hinge base alignment scale line
Auxiliary view Z
Z
Moving the hinge by one mark on
the scale (1 mm) will cause the
a–b value for an A3 size original
to change by approx. 1 mm.
the scale (1 mm) will cause the
a–b value for an A3 size original
to change by approx. 1 mm.
Right hinge base
recede direction
(B direction)
recede direction
(B direction)
Right hinge
Screw turn direction
Copy surface
b
a
Scale side
Moving the hinge by one mark on
the scale (1 mm) will cause the
a–b value for an A3 size original to
change by approx. 1 mm.
the scale (1 mm) will cause the
a–b value for an A3 size original to
change by approx. 1 mm.
Right hinge base
pull direction
(A direction)
pull direction
(A direction)
Right hinge
Screw turn direction
Copy surface
b
a
Scale side
Glass
surface
surface
Magnet assembly
Spacer part
(gap 0.5 mm or less)
Copier
suction plate
suction plate
-0.3
0
Match to exact
center of engraved marks.
center of engraved marks.
Microswitch
BKT-BA-KAIHEI
PF2269P147
Securing screw
30 to 60mm
AR-RF3 TROUBLESHOOTING 7 - 1
[7] TROUBLESHOOTING
Problem
Cause
Check and treatment
(1) The main switch of the
copier is ON, but the
ADF does not function at
all.
ADF does not function at
all.
1. Bad connection between copier and
ADF.
Confirm that all connectors are properly connected.
2. Bad connection in the connector plug
of the power cable connecting the
ADF to the copier.
ADF to the copier.
Check the conductance of the connector plug. If there is no conduc-
tance, replace the connector plug.
tance, replace the connector plug.
3. Defective document feed cover and
ADF open/close switches.
Check the conductance of each switch, and replace if there is no con-
ductance.
ductance.
4. Defective control PWB.
After ruling out causes 1 to 3 above, supply 24VDC, 5VDC currents from
the copier, and if 24V is not being output to pin CN9-6 on the PWB, and
5V to pin IC3-32, replace the control PWB.
the copier, and if 24V is not being output to pin CN9-6 on the PWB, and
5V to pin IC3-32, replace the control PWB.
(2) The document feed
motor does not work.
(3) The transport motor
does not work.
(4) The reversing motor
does not work.
1. Bad contact in the motor connector
plug.
Check the connector plug contacts. CN7 to CN9
2. There is a break in the motor coil con-
nection.
Check the conductance of the coil. If there is no conductance, replace
the coil.
the coil.
3. Defective control PWB.
If the motor does not work in the motor unit test mode, replace the con-
trol PWB.
trol PWB.
(5) In the duplex mode the
original does not reverse
and instead is expelled
to the document exit
tray.
and instead is expelled
to the document exit
tray.
1. Defective reverse solenoid connector
plug.
Check the connector contacts. (CN10)
2. Bad contact in the solenoid coil.
Check the conductance of the coil. If there is no conductance, replace
the coil.
the coil.
3. Defective control PWB.
If the solenoid does not work in the solenoid unit test mode, replace the
control PWB.
control PWB.
(6) Paper jam indication is
shown on the system
display.
display.
1. Paper jam.
Look for a paper jam, and remove any stuck paper.
2. Defective resist sensor.
Measure the voltage at TP8 on the control PWB and check that it is 3V
to 3.6V when there is no paper and 1.5V or less when there is paper. If
voltages other than these are measured, replace the resist sensor.
to 3.6V when there is no paper and 1.5V or less when there is paper. If
voltages other than these are measured, replace the resist sensor.
3. Defective timing sensor.
Measure the voltage at TP11 on the control PWB and check that it is 3V
to 3.6V when there is no paper and 1.5 V or less when there is paper. If
voltages other than these are measured, replace the timing sensor.
to 3.6V when there is no paper and 1.5 V or less when there is paper. If
voltages other than these are measured, replace the timing sensor.
4. Defective reverse sensor.
Measure the voltage at TP14 on the control PWB and check that it is 3V
to 3.6V when there is no paper and 1.5V or less when there is paper. If
voltages other than these are measured, replace the reverse sensor.
to 3.6V when there is no paper and 1.5V or less when there is paper. If
voltages other than these are measured, replace the reverse sensor.
5. Defective empty sensor.
Measure the voltage at TP5 on the control PWB and check that it is 5V
when there is no paper and 1V or less when there is paper. If voltages
other than these are measured, replace the empty sensor.
when there is no paper and 1V or less when there is paper. If voltages
other than these are measured, replace the empty sensor.
6. Defective document exit sensor.
Measure the voltage at TP16 on the control PWB and check that it is 1V
or less when there is no paper and 5V when there is paper. If voltages
other than these are measured, replace the document exit sensor.
or less when there is no paper and 5V when there is paper. If voltages
other than these are measured, replace the document exit sensor.
7. Defective control PWB.
If the problem does not improve even though the sensor levels change
when the respective sensor is turned ON/OFF, replace the control PWB.
when the respective sensor is turned ON/OFF, replace the control PWB.
(7) Cover open indication is
shown on the system
display.
display.
1. Defective document feed cover and
ADF open/closed switch.
Inspect the conductance of each switch.
2. Defective ADF front open sensor.
Measure the voltage at TP18 on the control PWB and check that it is 5V
when the ADF is open and 1V or less when the ADF is closed. If volt-
ages other than these are measured, replace the sensor.
when the ADF is open and 1V or less when the ADF is closed. If volt-
ages other than these are measured, replace the sensor.
3. Defective document feed open sensor.
Measure the voltage at TP4 on the control PWB and check that it is 5V
when the ADF is open and 1V or less when the ADF is closed. If volt-
ages other than these are measured, replace the sensor.
when the ADF is open and 1V or less when the ADF is closed. If volt-
ages other than these are measured, replace the sensor.
4. Defective document exit open sensor.
Measure the voltage at TP17 on the control PWB and check that it is 5V
when the ADF is open and 1V or less when the ADF is closed. If volt-
ages other than these are measured, replace the sensor.
when the ADF is open and 1V or less when the ADF is closed. If volt-
ages other than these are measured, replace the sensor.
5. Defective control PWB.
After ruling out causes 1 to 4 above, replace the control PWB.
AR-RF3 ELECTRICAL SECTION 8 - 1
[8] ELECTRICAL SECTION
1. General
This circuit controls feeding, transport, reversing and discharge of the original.
It is composed of sensors, switches, and circuits which process the signals from the copier; the circuits which drive the respective motors and sole-
noids; and the CPU and its peripheral circuits.
noids; and the CPU and its peripheral circuits.
2. Block diagram
Power supply
circuit
circuit
AOSW
ADF open
switch
ADF open
switch
ADF open
switch input
circuit
switch input
circuit
Document feed
open sensor
input circuit
open sensor
input circuit
Front open
sensor input
circuit
sensor input
circuit
Document exit
open sensor
input circuit
open sensor
input circuit
Reset circuit
Original width
sensor input
circuit
sensor input
circuit
Empty sensor
input circuit
input circuit
Reverse
sensor
input circuit
sensor
input circuit
DRS
Reverse sensor
Reverse sensor
TIMS
Timing sensor
Timing sensor
REGS
Resist sensor
Resist sensor
DLS2
Original length
sensor 2
Original length
sensor 2
DLS1
Original length
sensor 1
Original length
sensor 1
DWVR
Original width
volume
Original width
volume
Original width
volume input
circuit
volume input
circuit
Original length
sensor 1 input
circuit
sensor 1 input
circuit
Original length
sensor 2 input
circuit
sensor 2 input
circuit
Timing
sensor
input circuit
sensor
input circuit
Reverse
solenoid
drive circuit
solenoid
drive circuit
Delivery
motor drive
circuit
motor drive
circuit
Transport
motor drive
circuit
motor drive
circuit
Document
feed motor
drive circuit
feed motor
drive circuit
CPU
DFM
Document
feed motor
Document
feed motor
DTM
Transport
motor
Transport
motor
DEM
Delivery
motor
Delivery
motor
DRSOL
Reverse
solenoid
Reverse
solenoid
Resist
sensor
input circuit
sensor
input circuit
EMPS
Empty sensor
Empty sensor
DWS
Original width
sensor
Original width
sensor
DFOS
Document feed
open sensor
Document feed
open sensor
DFSW
Document feed
open switch
Document feed
open switch
+24V
INTER
FACE
FACE
FOS
Front open
sensor
Front open
sensor
DEOS
Discharge open
sensor
Discharge open
sensor
+5V
+DC24V
PGND
+DC5V
+SGND
D/A
ROM
E2PROM
A
A
Rush current
prevention circuit
prevention circuit
AR-RF3 ELECTRICAL SECTION 8 - 2
3.
Actual wiring c
har
t
Or
iginal width
v
olume
Or
iginal length
sensor 1 S
Or
iginal length
sensor 2 L
Document f
eed
open sensor
Empty sensor
Resist sensor
Timing sensor
ADF open SW
Document f
eed
co
v
er open SW
Slee
v
e
DS110U
F
aston ST
O-01T
-110N
Slee
v
e
DS110U
F
aston ST
O-01T
-110N
Housing ELP-12
Contact SLF-01T
-P1.3E
Contact SLF-41T
-P1.3E
Jig connector
Housing XHP-5
T
e
rm
inal SXH-001T
-P0.6
Housing XHP-7
T
e
rm
inal SXH-001T
-P0.6
Housing EHR-6
T
e
rm
inal SEH-001T
-P0.6
Document f
eed
motor
T
ranspor
t motor
Deliv
er
y motor
Re
v
erse solenoid
F
ront open
sensor
Indicator LED
Re
v
erse sensor
Document e
xit
sensor
Document e
xit
open sensor
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
Click on the first or last page to see other AR-RF3 (serv.man2) service manuals if exist.