SHARP AR-SP4 Service Manual
SERVICE MANUAL
Digital copier option
Single Pass Feeder
(SPF)
MODEL AR-SP4
CONTENTS
[ 1 ] PRODUCT OUTLINE........... ............................................ ...................... 1
[ 2 ] SPECIFICATIONS ................................................................................. 1
[ 3 ] UNPACKING AND INSTALLATION....................................................... 1
[ 4 ] EXTERNAL VIEW AND INTERNAL STRUCTURE................................ 4
[ 5 ] OPEREATIONAL DESCRIPTIONS ....................................................... 5
[ 6 ] ADJUSTMENTS..................................................................................... 6
[ 7 ] DISASSEMBLY AND ASSEMBLY......................................................... 8
[ 8 ] MAINTENANCE....................................................................................13
[ 9 ] ELECTRICAL SECTION .......................................................................14
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
This document has been published to be used
SHARP CORPORATION
for after sales service only.
The contents are subject to change without notice.
[1] PRODUCT OUTLINE
This machine is a duplex document auto feeder attached to a digital
copier.
It feeds originals automatically to allow continuous copying.
[2] SPECIFICATIONS
[3] UNPACKING AND INSTALLATION
1. Unpacking
Document set
direction
Document set
position
Document
transport system
Document feed
sequence
Document size AB series: A3 ~ A5
Document weight 56 ~ 90g/m
Document set
quantity
Dimensions 583mm (W) x 435mm (D) x 133mm (H)
Weight About 5.0 kg
Power source Supplied from the copier. (DC 24V)
Power consumption 21W
Document size
detection
Detection size Japan: A3, B4, A4, A4R, B5, B5R,
Document mixture Mixture paper feed:
Random paper feed Unavailable
Document reverse None
Display section
(LED)
Document
replacement speed
Face up
Center reference
Sheet through type
Top take-up feed
Inch series: 11 x 17 ~ 8.5 x 5.5
2
, 15 ~ 23.9lbs
Max. 30 sheets (30 sheets, 90g/m
Max. thickness 4mm
On the document feed tray
A5 (A5R for FAX only)
Inch series: 11 x 17, 8.5 x 14, 8.5 x 11,
8.5 x 11R, 8.5 x 5.5
EX AB series: A3, B4, A4, A4R,
A5 (A5R for FAX only)
Copy mode: Unavailable
FAX mode: Allowed (Same width)
None
S ® S: 23 sheets/min
S ® S: 27 sheets/min
(Document replacement rate 100%)
2
)
2. Installation
Parts included
4. Remove the glass holde rs (rig ht an d le ft) and remo ve
the document glass.
Remove the right and left glass holders and remove the document
glass.
Right glass holder
Document glass
SPF glass cover
Turn off the main switch of the copier and then remove the power plug
of the copier from the outlet.
1. Remove the plate n co ve r .
Lift the platen cover and remove it from the copier.
2. Remove the screws of the glass holders.
Remove the two screws (M3 x 8) of the left glass holder and the three
screws (M3 x 8) of the right glass holder.
Left glass holder
5. Attach the front cabinet.
Attach the front cabinet of the copier.
At this time, ensure that the three pawls on the rear side are securely
inserted to the frame of the copier.
Pawls
Screws (M3 x 8)
Screws (M3 x 8)
3. Remove the front cabinet.
While raising the front cabinet toward your side, remove the three
pawls from the rear side of the front cabinet.
Pawls
6. Attach the RSPF glass holder.
Insert the SPF glass holder to the document glass.
Then, attach the document glass to the copier, fix the left glass holder
that has been removed in step 3 using two screws (M3 x 8), and fix
the SPF glass using three screws (M3 x 8).
SPF glass holder
Document glass
Screws (M3 x 8)
Screws (M3 x 8)
7. Attach the SPF.
Insert the hinge portion of the SPF to the mounting portion of the
copier by holding the SPF at an angle toward the rear side.
Hinge
8. Connect the relay connector.
Connect the Centronics connector of the SPF to the connector of the
copier and then tighten the screws of the connector.
If the magnification ratio of the copy from the SPF is different from that
of the copy from the document glass, carry out adjustment referring to
the service manual.
12. Check the center di splacement.
Set an original on the document glass and copy it.
Then, set an original in the document feeder tray and copy it.
If the center of the copy image from the SPF is different from that of
the copy image from the document glass, carry out adjustment referring to the service manual.
13. Check the top end position.
Set an original on the document glass and copy it.
Then, set an original in the document feeder tray and copy it.
If the top end position of the copy image from the SPF is different from
that of the copy image from the document glass, carry out adjustment
referring to the service manual.
14. Check the open/close detection position.
If the open/close detection position measured with the open/close
detection position adjustment method described in the service manual
does not conform to the specifications, carry out adjustment referring
to the service manual.
Installation of SPF is now complete.
Screw
Screw
9. Remove the filament tape.
Remove the filament tape located in the positions shown in the illustration.
Filament tape
Insert the power plug of the copier to the outlet and turn on the main
switch of the copier.
10. Adjust the SPF whit e co mp en sa tio n pixels.
Open the SPF, execute simulation 63-7, and adjust the SPF automatic
white compensation pixels.
11. Check the copy magnification ratio.
Set an original on the document glass and copy it.
Then, set an original in the document feeder tray and copy it.
[4] EXTERNAL VIEW AND INTERNAL STRUCTURE
1. External view
1
2
3
4
5
No. Name No. Name No. Name
1 Document set tray 2 Document guide 3 Document feed section cover
4 Document transport section cover 5 Document exit section
2. Internal structure
14
13
12
10
9
6
7
15
5
4
Sensors and detectors
No. Code Name Type Function, operation
1 W0 Document set sensor Photo transmission Document presence detection
2 COVER Open/close sensor Photo transmission Paper feed unit open/close detection
3 W1 Document sensor (A4R, LTR, A5) Photo transmission Tray document width detection
4 W2 Document width sensor (B4R, B5) Photo transmission Tray document width detection
5 W3 Document width sensor (WLTR, A5R, A4, LT) Photo transmission Tray document width detection
6 PSOL Pickup solenoid — —
7 PAPER Paper entry sensor Photo transmission Document presence detection
9 CLH Transport clutch — —
10 MOT SPF motor Stepping motor Tray paper feed, transport, paper exit roller drive
12 — Interface PWB — SPF control and communication with the copier body
13 L1 Document length detection SW (Short) Photo transmission Tray document length detection
14 L2 Document length detection SW (Long) Photo transmission Tray document length detection
15 COVER OPEN Book sensor Photo transmission Dete cts SPF floating.
16 PO Paper exit sensor Photo transmission Detects transport of document.
1
3
16
2
[5] OPEREATIONAL DESCRIPTIONS
3. Document size detection
1. Paper feed section major parts
1
2
3,4
5
6
7
8
1011
12
13
No. Part name Operation
1 Document length
sensor (L2)
2 Document length
sensor (L1)
3 Document length
sensor (W0)
4 Document width sensor
(W1, W2, W3)
5 Pickup roller Picks up the document.
6 Paper feed roller Feed and transport the document.
7 Paper entry sensor
(PAPER)
8 PS roller Makes synchronization between
9 PS follower roller Makes synchronization between
10 Transport roller Transports the document.
11 Transport follower roller Transports the document.
12 Paper exit sensor Detects transport of documents.
13 Paper exit follower roller Discharges the document.
14 Paper exit roller Discharges the document.
Detects the document length on
the tray.
Detects the document length on
the tray.
Detects the presence of document.
Detects the document width.
Detects the document transport.
the document lead edge and the
image lead edge.
the document lead edge and the
image lead edge.
9
2. Brief descriptions of operations
1) Document set (Document set sensor ON)
2)
Document size detection (The document width is detected with
document width sensors W1, W2, and W3, and the document length is
detected with document length sensors L1 and L2.)
3) Copy start (Machine)
4) SPF motor ON
5) Pickup solenoid ON
6) Pickup roller and paper feed roller rotation
7) Paper entry sensor detects paper presence.
8) PS roller rotation
Document size detection by document set tray
When a document is set on the document set tray in the auto mode of
paper/copy magnification ratio selection, the document size is detected to perform the auto selection function of paper and the copy
magnification ratio according to the detected document size.
When documents of different sizes are mixed and set on the tray, the
max. size is detected. The document width is detected by the document width sensors (W1, W2, W3), and the document length is detected by the document length sensors (L1, L2) to determine the
document size.
The document size judgment is made after a certain time from when
the document set sensor (W0) detects the document.
Document size
and set direction
A5
B5
A5R
AB
series
Inch
series
[Note] Sensor ON: , OFF:
A4
B5R
A4R
8.5" x 13"
B4
A3
8.5" x 5.5"
8.5" x 5.5"R
11" x 8.5"
11" x 8.5"R
8.5" x 13"
8.5" x 14"
11" x 17"
Document width sensor
W1 W2 W3 L1 L2
Document
length sensor
9) Copy operation ( Machine)
10) Transport roller rotation
11) Paper exit roller rotation
12) Document exit
YES
13) Next document
14) SPF motor OFF
NO
[6] ADJUSTMENTS
(1) SPF auto white correction pixel adjustment
(2) RSPF magnification ratio adjustment
[Function]
The SPF white correction start pixel position is automatically adjusted.
This adjustment is performed after the lens unit is replaced.
[Operation]
(Initial screen)
Sim63-7 SPF ADJ.
WHITE ADJUST
PRESS OK KEY EXEC
Press
the [OK] key.
Press
the [RETURN] key.
(During execution)
Sim63-7 SPF ADJ.
WHITE ADJUST
EXEC
During execution,
"EXEC" is highlighted.
Normal end Abnormal end
Open the SPF unit and press the [OK] key.
[ ] indicates the order number of the pixel of the white
sheet for SPF exposure correction in the SPF position.
When the adjustment is completed normally,
"COMPLETE" is displayed, and data are written into the
EEPROM.
When the adjustment is completed abnormally,
"ERROR" is displayed and data are not written into the
EEPROM.
[CA] key: Cancels the test command.
[Interruption] key: Shifts to the sub code entry menu.
[OK] key: Shifts to the execution menu.
The SPF white correction start pixel = Displayed
pixel position - 34
Interruption is inhibited during execution.
If the simulation is executed with the SPF unit
closed, an error is resulted.
1) Place a scale on the document table as shown below, and make a
2) Set the test chart to the SPF and make a normal copy.
3) Compare the copy and the test chart.
4) Execute SIM 8-1. The auto exposure lamp lights up.
5) The current correction value is displayed on the display section in
(Initial screen with the execution result displayed)
Sim63-7 SPF ADJ.
WHITE ADJUST
CPMPLETE
[160]
PRESS OK KEY EXEC
Sim63-7 SPF ADJ.
WHITE ADJUST
ERROR
[ 0]
PRESS OK KEY EXEC
6) Enter the set value, and press the START key.
7) Change the duplex document mode to the simplex document
8) Enter the set value, and press the SATART key.
<Adjustment specifications>
Mode Spec SIM Set value Set range
Magnification ratio adjustment Normal: ± 1.0% SIM 48-1
4: SPF surface magnification ratio adjustment
5: SPF back magnification ratio adjustment
Note : When performing this adjustment, check that the CCD unit
is properly installed.
: When perf orming this adjustment, check that the OC mode
adjustment in copying is completed.
normal copy to make a test chart.
Note: Since the printed paper is used as the test chart,
place the scale in parallel to both sides.
If an adjustment is needed, perform the following procedures.
two digits.
The entered correction value is stored and a copy is made.
mode.
The MANUAL lamp lights up, and the current correction value of
the back surface sub scanning direction magnification ratio is displayed on the display section in two digits.
The entered correction value is stored and a copy is made.
Add 1: 0.1% increase
1 ~ 99
Reduce 1: 0.1% decrease
(3) SPF document off center adjustment
Note : When performing this adjustment, check that the paper off-
center is properly adjusted.
1) Set the center position adjustment test chart (m ade by yourself) on
the RSPF.
<Adjustment specifications>
Draw a line in the center of paper. (In the scanning direction)
<Adjustment specifications>
Mode Specification SIM Set value Set range
Document off-center (SPF mode) Simplex: Center ± 3.0mm
Duplex: Center ± 3.5mm
2) Make a normal copy from the manual feed tray, and compare the
copy and the test chart.
If an adjustment is required, perform the following procedures.
3) Execute SIM 50-12.
4) The current off-center adjustment value is displayed on the display
section in two digits.
5) Enter the set value and press the START key.
The entered correction value is started and a copy is made.
SIM 50-12
2: SPF surface
Add 1: 0.1mm shifted to R side.
Reduce 1: 0.1mm shifted to L side.
1 ~ 99
3: SPF back
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