Sharp AR-275 (serv.man14) Service Manual ▷ View online
AR-235/275 EXTERNAL VIEW AND INTERNAL STRUCTURE - 1
[6] EXTERNAL VIEW AND INTERNAL STRUCTURE
1. External view
2. Internal
No.
Name
Function/Operation
1
Platen cover (optional)
Place the original on the original table and close the platen cover before copying starts.
2
Paper output tray
Finished copies are deposited in the paper output tray.
3
Front cover
Open to remove misfeeds and for copier servicing.
4
Paper trays
Each tray holds 500 sheets of copy paper.
5
Power switch
Press to turn copier power on and off.
6
Handles
Use to move the copier.
7
Operation panel
All copier controls are located here for easy operation.
8
Original table
Place the document to be copied here.
9
Upper exit area cover
Open to remove misfeeds when an optional job separator tray kit or finisher is installed.
10
Side cover
Open to remove misfeeds.
11
Side cover handle
Lift and pull to open the side cover.
12
Bypass tray guides
Adjust to the width of the copy paper.
13
Bypass tray
Special papers (including transparency film) and copy paper can be fed from the bypass tray.
14
Bypass tray extension
Pull out when feeding large paper such as 8-1/2" x 14" and 11" x 17".
1
2
6
3
4
4
5
No.
Name
Function/Operation
1
Toner cartridge lock release lever
Use to unlock the toner cartridge.
2
Toner cartridge
Contains toner.
3
Paper guide
Open to remove misfed paper.
4
Fusing unit release levers
Lower to remove misfed paper.
5
Roller rotating knob
Turn to remove misfed paper.
1
2
6
3
4
4
5
AR-235/275 EXTERNAL VIEW AND INTERNAL STRUCTURE - 2
3. Operation panel
A. Key position
(U.S.A., Canada)
B. LCD panel
(U.S.A., Canada)
No.
Name
Function/Operation
1
COPY key and indicator
Press to select the COPY mode.
Press and hold during standby to display the total output count. Quantity of toner remaining is also displayed.
Press and hold during standby to display the total output count. Quantity of toner remaining is also displayed.
2
Display
Displays information to assist the operator.
3
BACK key
Press to return the display to the previous screen.
4
Information key
Press to display the detailed description when [i] is displayed at the upper right of the display.
5
JOB STATUS key
Press to check the settings of selected functions or the status of reserved output jobs.
6
OK key
Press to register the selected setting.
7
Copy quantity display
Displays the specified copy quantity during the ready condition and displays the copy countdown as copies are
made.
made.
8
Numeric keys
Used to select the desired copy quantity.
9
INTERRUPT key and
indicator
indicator
Interrupts a copy run.
10
CLEAR ALL key
Clears all selected settings and returns the copier to the initial settings.
11
START key and indicator
Copying is possible when the indicator is on.
Press to start copying.
Press to start copying.
12
EXPOSURE key
Used to select the exposure modes: AUTO, TEXT, TEXT/PHOTO, PHOTO or SUPER PHOTO.
13
PAPER SELECT key
Used to manually select a paper tray.
14
COPY RATIO key
Press to select a reduction or enlargement copy ratio.
15
AUTO IMAGE key
Press for automatic copy ratio selection.
16
2-SIDED COPY key
Press to select the 1-sided to 1-sided, 1-sided to 2-sided, 2-sided to 1-sided* or 2-sided to 2-sided* copy mode.
*To select the 2-sided to 1-sided or 2-sided to 2-sided copy mode, an optional RSPF must be installed.
*To select the 2-sided to 1-sided or 2-sided to 2-sided copy mode, an optional RSPF must be installed.
17
OUTPUT key
Press to select the sort, group or staple sort* mode.
*To select the staple sort mode, an optional finisher must be installed.
*To select the staple sort mode, an optional finisher must be installed.
18
SPECIAL FUNCTION key
Press to select special functions.
19
Arrow keys
Press to move the highlighted item in the display.
20
AUDIT CLEAR key
Press to close an open account.
21
Zero key
Use as part of numeric keys to enter copy quantity.
Press during a continuous copy run to display the number of copies completed in the current run.
Press during a continuous copy run to display the number of copies completed in the current run.
22
PROGRAM/READ END
key
key
Press to select the job memory mode.
Press to finish scanning of originals and to start copying when copying from the original table.
Press to finish scanning of originals and to start copying when copying from the original table.
23
CLEAR key
Press to clear the copy quantity display or press during a copy run to terminate copying.
These keys and indicators are not used
for the copier features
for the copier features
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23
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5 6
7
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4
2
3
1
5
6
No.
Name
Function/Operation
1
Exposure display
Indicates the selected exposure mode.
2
Message display
Messages are displayed regarding
copier status and operation.
copier status and operation.
3
Original size display
The original paper size is displayed.
4
Copy ratio display
Displays the copy ratios for reductions
or enlargements.
or enlargements.
5
Paper size display
Displays the selected paper size.
When "AUTO" is displayed, paper size
matching the original and copy ratio
will be automatically selected.
When "AUTO" is displayed, paper size
matching the original and copy ratio
will be automatically selected.
6
Paper tray display
The selected paper feed location is
highlighted.
highlighted.
AR-235/275 EXTERNAL VIEW AND INTERNAL STRUCTURE - 3
4. Motor, Solenoid, Clutch
5. Sensor
No.
Name
Code
Function and operation
1
Mirror motor
MIRM
Optical mirror base drive
2
Shifter motor
SFTM
Shifter drive
3
Paper exit gate
switching solenoid
switching solenoid
PGSOL
Paper exit gate switcher
4
Duplex motor
DPXM
Duplex paper switching
and exit roller
and exit roller
5
Cooling fan
TFAN
Cools the inside of the
unit.
unit.
6
Main motor
MM
Main drive
7
PS clutch
PSRSOL
Main unit paper feed
8
Manual paper feed
solenoid
solenoid
Manual paper feed
solenoid
solenoid
9
Manual paper feed
clutch
clutch
HPSOL
Manual paper feed clutch
10
Paper feed transfer
clutch
clutch
Paper feed transfer
clutch
clutch
11
Paper feed clutch
PCL1H
Paper feed roller drive
12
Cassette lift-up motor
LUM1H
Cassette paper lift-up
13
Paper feed solenoid
PCS1H
Solenoid for the paper
feed from the cassette
feed from the cassette
14
2nd cassette paper
feed solenoid
feed solenoid
15
Toner motor
TM
Toner supply
16
Separation pawl
solenoid
solenoid
PREMS
OL
Separation pawl
operation solenoid
operation solenoid
17
Exhaust fan motor
PSFAN
Cools the inside of the
unit.
unit.
18
Intake fan motor
1
2
3
4
5
6
7
8
9
10
11
15
16
17
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13
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18
No
.
Name
Code
Function and
operation
1
Original size sensor
DSIN0
Document size
detection
detection
2
Mirror home position
sensor
sensor
MHPS
Mirror (scanner)
home position
detection
home position
detection
3
Document cover
sensor
sensor
OCCOVER
Document cover
open/close detection
open/close detection
4
Document size sensor
DSIN3
Document size
detection
detection
5
1st paper exit sensor
POUT
1st paper exit
detection
detection
6
Shifter home position
sensor
sensor
SFTHP
Shifter home position
sensor detection
sensor detection
7
Paper exit sensor
(DUP side)
(DUP side)
PDPX
Paper exit detection
8
Thermistor
RTHIN
Fusing temperature
detection
detection
9
Thermostat
Abnormal high
temperature detection
in the fusing section
temperature detection
in the fusing section
10
Manual feed paper
entry sensor
entry sensor
HPIN
Sensor of paper entry
from the manual
paper feed tray, the
2nd/multi-stage desk,
or the DUP
from the manual
paper feed tray, the
2nd/multi-stage desk,
or the DUP
11
1st cassette (paper
tray) detection
tray) detection
CSS1
1st cassette (paper
tray) empty detection
tray) empty detection
12
Manual feed paper
empty sensor
empty sensor
HPEMPTY
Manual feed paper
empty detection
empty detection
13
2nd cassette (paper
tray) detection
tray) detection
2nd cassette (paper
tray) empty detection
tray) empty detection
14
Manual feed width
detection volume
detection volume
HPWS
Manual feed paper
width detection
width detection
15
Manual paper feed
tray empty sensor 2
tray empty sensor 2
HPTRAY2
Manual feed tray
position detection
position detection
16
Manual paper feed
tray empty sensor 1
tray empty sensor 1
HPTRAY1
Manual feed tray
position detection
position detection
17
Manual feed length
detection sensor 2
detection sensor 2
HPSIZE2
Manual feed paper
length detection
length detection
18
Manual feed length
detection sensor 1
detection sensor 1
HPSIZE1
Manual feed paper
length detection
length detection
1
2
3
4
5
6
7
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30
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26
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AR-235/275 EXTERNAL VIEW AND INTERNAL STRUCTURE - 4
6. PWB unit
7. Section
19
Door switch
SW24V
Front door and side
door open/close
detection
door open/close
detection
20
2nd right door switch
Side door open/close
detection
detection
21
2nd cassette paper
pass sensor
pass sensor
2nd cassette paper
pass
pass
22
2nd cassette paper
upper limit detection
sensor
upper limit detection
sensor
2nd cassette paper
upper limit detection
upper limit detection
23
2nd cassette paper
empty sensor
empty sensor
2nd cassette paper
empty detection
empty detection
24
1st cassette paper
upper limit detection
sensor
upper limit detection
sensor
LUD1H
1st cassette paper
upper limit detection
upper limit detection
25
1st cassette paper
empty sensor
empty sensor
PAP1H
1st cassette paper
empty detection
empty detection
26
Center tray peper
YES/NO sensor
YES/NO sensor
TRAYPAPER
Center tray peper
YES/NO detection
YES/NO detection
27
Right cabinet door
switch
switch
POUTCOV
Right cabinet door
open/close detection
open/close detection
28
2nd paper exit sensor
POUT2
2nd paper exit
detection
detection
29
2nd paper exit full
detection sensor
detection sensor
PFULL2
2nd paper exit section
full detection
full detection
30
1st cassette paper
pass sensor
pass sensor
1st cassette paper
pass
pass
No.
Name
Function and operation
1
Inverter PWB
Copy lamp control
2
CCD PWB
For image scanning (read)
3
Option connector PWB
4
IMC PWB
Image process
5
MCU PWB
Main unit control
6
Mother board
Connection with FAX PWB and
PCL PWB
PCL PWB
7
Tray interface PWB
2nd tray control
8
KEY/LED PWB (right side)
For the copy operation
9
LCD back light PWB
LCD control
10
KEY/LED PWB (left side)
For the FAX operation
11
Power source PWB
AC power input/DC voltage
control
control
No
.
Name
Code
Function and
operation
1
2
3
4
5
6
7
8
11
10
9
No.
Name
Function and operation
1
Copy lamp
Image radiation lamp
2
Copy lamp unit
Operates in synchronization with
2nd/3rd mirror unit to radiate
documents sequentially.
2nd/3rd mirror unit to radiate
documents sequentially.
3
LSU unit
Converts image signals into laser
beams to write on the dum.
beams to write on the dum.
4
Lens unit
Reads images with the lens and
the CCD.
the CCD.
5
MC holder unitSupplies negat
ive charges evenly
on the drum.
6
Paper exit roller
Paper exit roller
7
Transport roller
Paper transport roller
8
Upper heat roller
Fuses toner on paper.
(with the teflon roller)
(with the teflon roller)
9
Lower heat roller
Fuses toner on paper.
(with the silicone rubber roller)
(with the silicone rubber roller)
10
Drum unitForms images.
11
DUP transport follower
roller
roller
Duplex paper transport
12
DUP transport roller
Duplex paper transport
13
Transport roller
Transfer images on the drum onto
paper.
paper.
14
Resist roller
Synchronize the paper lead edge
with the image lead edge.
with the image lead edge.
15
Manual feed tray
Manual feed paper tray
16
Manual paper feed roller
Picks up papers in manual paper
feed port.
feed port.
17
Manual feed transport
roller
roller
Transports paper from the manual
paper feed port.
paper feed port.
18
1st cassette pick-up
roller
roller
Picks up paper from the cassette.
19
1st cassette paper feed
roller
roller
Transports the picked up paper to
RESIST section.
RESIST section.
20
2nd cassette pick-up
roller
roller
Picks up paper from the cassette.
21
2nd cassette paper feed
roller
roller
Transports the picked up paper to
RESIST section.
RESIST section.
22
MG roller
Puts toner on the OPC drum.
23
2nd/3rd mirror unit
Reflects the images from the copy
lamp unit to the lens unit.
lamp unit to the lens unit.
21
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23
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