Sharp AR-M276 (serv.man6) Service Manual ▷ View online
AR-M236/M276/M237/M277 EXTERNAL VIEW AND INTERNAL STRUCTURE 6 - 4
E. Motor, Solenoid, Clutch
F. Sensor
No.
Name
Code
Function and operation
1
Mirror motor
MIRM
Optical mirror base
drive
drive
2
Shifter motor
SFTM
Shifter drive
3
Paper exit gate
switching solenoid
switching solenoid
PGSOL
Paper exit gate
switcher
switcher
4
Duplex motor
DPXM
Duplex paper switching
and exit motor
and exit motor
5
DUP-2 motor
Reverse pass for paper
transport
transport
6
Cooling fan
TFAN
Cools the inside of the
unit.
unit.
7
Main motor
MM
Main drive
8
PS clutch
PSRSOL
Main unit paper feed
9
Paper feed clutch
PCL1H
Paper feed roller drive
10
Manual paper feed
solenoid
solenoid
Manual paper feed
solenoid
solenoid
11
Paper feed transfer
clutch
clutch
Paper feed transfer
clutch
clutch
12
Manual paper feed
clutch
clutch
HPSOL
Manual paper feed
clutch
clutch
13
Cassette lift-up motor
LUM1H
Cassette paper lift-up
14
Cassette lift-up motor
LUM2H
Cassette paper lift-up
15
2nd cassette paper
feed solenoid
feed solenoid
16
Paper feed solenoid
PCS1H
Solenoid for the paper
feed from the cassette
feed from the cassette
17
Toner motor
TM
Toner supply
18
Dehumidification
heater (Japan only)
heater (Japan only)
Paper dehumidification
in a cassette
in a cassette
19
Separation pawl
solenoid
solenoid
PREMSOL
Separation pawl
operation solenoid
operation solenoid
21
Exhaust fan motor
PSFAN
Cools the inside of the
unit.
unit.
22
Intake fan motor
1
2
6
3
4
5
7
8
9
8
9
10
11
20
21
12
13
14
15
16
17
19
18
No.
Name
Code
Function and
operation
1
Mirror home position
sensor
sensor
MHPS
Mirror (scanner) home
position detection
position detection
2
Document cover
sensor
sensor
OCCOVER
Document cover
open/close detection
open/close detection
3
Document size sensor
DSIN3
Document size
detection
detection
4
2nd paper exit sensor
POUT2
2nd paper exit
detection
detection
5
2nd paper exit full
detection sensor
detection sensor
PFULL2
2nd paper exit section
full detection
full detection
6
Right cabinet door
switch
switch
POUTCOV
Right cabinet door
open/close detection
open/close detection
7
1st paper exit sensor
POUT
1st paper exit
detection
detection
8
Shifter home position
sensor
sensor
SFTHP
Shifter home position
sensor detection
sensor detection
9
Paper exit sensor
(DUP side)
(DUP side)
PDPX
Paper exit detection
10
Thermistor
RTHIN
Fusing temperature
detection
detection
11
Thermostat
Abnormal high
temperature detection
in the fusing section
temperature detection
in the fusing section
12
1st cassette (paper
tray) detection
tray) detection
CSS1H
1st cassette (paper
tray) empty detection
tray) empty detection
13
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
14
Manual paper feed
tray empty sensor 2
tray empty sensor 2
HPTRAY2
Manual feed tray
position detection
position detection
15
Manual paper feed
tray empty sensor 1
tray empty sensor 1
HPTRAY1
Manual feed tray
position detection
position detection
16
Manual feed length
detection sensor 1
detection sensor 1
HPSIZE1
Manual feed paper
length detection
length detection
17
Manual feed length
detection sensor 2
detection sensor 2
HPSIZE2
Manual feed paper
length detection
length detection
18
Manual feed paper
empty sensor
empty sensor
HPEMPTY
Manual feed paper
empty detection
empty detection
1
2
3
6
7
8
9
12
14
15
15
16
17
18
19
20
21
22
23
25
26
27
28
29
24
13
30
31
32
10
4
5
11
AR-M236/M276/M237/M277 EXTERNAL VIEW AND INTERNAL STRUCTURE 6 - 5
G. PWB unit
H. Section
19
Door switch
SW24V
Front door and side
door open/close
detection
door open/close
detection
20
2nd right door switch
DRS1A
Side door open/close
detection
detection
21
2nd cassette paper
pass sensor
pass sensor
PPD1A
2nd cassette paper
pass
pass
22
2nd cassette paper
upper limit detection
sensor
upper limit detection
sensor
LUD1A
2nd cassette paper
upper limit detection
upper limit detection
23
2nd cassette paper
empty sensor
empty sensor
PAP1A
2nd cassette paper
empty detection
empty detection
24
Drum initial sensor
DRST
Drum unit initial
detection
detection
25
1st cassette paper
pass sensor
pass sensor
PIN
1st cassette paper
pass
pass
26
1st cassette paper
upper limit detection
sensor
upper limit detection
sensor
LUD1H
1st cassette paper
upper limit detection
upper limit detection
27
1st cassette paper
empty sensor
empty sensor
PAP1H
1st cassette paper
empty detection
empty detection
28
Toner sensor
Toner density
detection
detection
29
Center tray peper
YES/NO sensor
YES/NO sensor
TRAYPAPER Center tray peper
YES/NO detection
30
Dehumidification
heater (Japan only)
heater (Japan only)
DHSW
Dehumidification
heater ON/OFF
switch
heater ON/OFF
switch
31
Main switch
PSSW
Main power switch
32
Original size sensor
DSIN0
Document size
detection
detection
Reverse pass paper
detection sensor
detection sensor
DUP2
Reverse pass
detection
detection
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
DC power supply PWB
DC voltage control
No.
Name
Code
Function and
operation
1
2
3
4
5
6
7
8
9
10
11
9
High voltage PWB
High voltage control
10
KEY PWB
11
OPU PWB
Operation panel control
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 unit
Supplies negative charges evenly
on the drum.
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 unit
Forms 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.
No.
Name
Function and operation
1
2
3
4
5
6
7
8
9
10
11
12
13
14
11
12
13
14
16
17
18
19
17
18
19
15
20
21
22
23
AR-M236/M276/M237/M277 ADJUSTMENTS 7 - 1
[7] ADJUSTMENTS, SETTING
1. List of adjustment items
2. Copier adjustment
A. Process section
(1) Developing doctor gap adjustment
1) Loosen the developing doctor fixing screw A.
2) Insert a thickness gauge of 1.5mm to the three positions at 20mm
and 150mm from the both ends of the developing doctor as shown.
3) Tighten the developing doctor fixing screw.
4) Check the clearance of the developing doctor. If it is within the
specified range, then fix the doctor fixing screw with screw lock.
∗
When inserting a thickness gauge, be careful not to scratch the
developing doctor and the MG roller.
developing doctor and the MG roller.
<Adjustment specification>
(2) MG roller main pole position adjustment
1) Put the developing unit on a flat surface.
2) Tie a needle or pin on a string.
3) Hold the string and bring the needle close to the MG roller horizon-
tally. (Do not use paper clip, which is too heavy to make a correct
adjustment.) (Put the developing unit horizontally for this adjust-
ment.)
adjustment.) (Put the developing unit horizontally for this adjust-
ment.)
4) Do not bring the needle into contact with the MG roller, but bring it
to a position 2 or 3mm apart from the MG roller. Mark the point on
the MG roller which is on the extension line from the needle tip.
the MG roller which is on the extension line from the needle tip.
5) Measure the distance from the marking position to the top of the
doctor plate of the developing unit to insure that it is 18mm.
If the distance is not within the specified range, loosen the fixing
screw A of the main pole adjustment plate, and move the adjust-
ment plate in the arrow direction to adjust.
screw A of the main pole adjustment plate, and move the adjust-
ment plate in the arrow direction to adjust.
Section
Adjustment item
Adjustment procedure/SIM No.
A
Process section
(1)
Developing doctor gap adjustment
Developing doctor gap adjustment
(2)
MG roller main pole position adjustment
MG roller main pole position adjustment
(3)
Developing bias voltage adjustment
SIM8-1
(4)
Grid bias voltage adjustment (High mode)
SIM8-2
(5)
Grid bias voltage adjustment (Low mode)
SIM8-3
B
Mechanism section
(1)
Print start position adjustment
SIM50-5
(2)
SPF (RSPF) image lead edge position adjustment
SIM50-6
(3)
Rear edge void adjustment
SIM50-1-6
(4)
Paper off center adjustment
SIM50-10
(5)
Left edge void area adjustment
SIM50-1-8
(6)
Main scanning direction (FR direction) distortion
balance adjustment
balance adjustment
No. 2/3 mirror base unit installing position
adjustment
Copy lamp unit installing position adjustment
adjustment
Copy lamp unit installing position adjustment
(7)
Sub scanning direction (scanning direction)
distortion adjustment
distortion adjustment
Winding pulley position adjustment
(8)
Main scanning direction (FR direction) distortion
adjustment
adjustment
Rail height adjustment
(9)
Main scanning direction (FR direction)
magnification ratio adjustment
magnification ratio adjustment
SIM48-1-1
(10)
Sub scanning direction (scanning direction)
magnification ratio adjustment
magnification ratio adjustment
a
OC mode in copying (SIM 48-1-2)
b
RSPF sub scanning direction magnification ratio
(SIM48-1-3, 48-1-4)
(SIM48-1-3, 48-1-4)
(11)
Off center adjustment (RSPF mode)
SIM50-12
(12)
OC (RSPF) open/close detection position
adjustment
adjustment
SIM41-3
(13)
Original sensor adjustment
SIM41-2, 41-4
(14)
RSPF white correction pixel position adjustment
(required in an RSPF model when replacing the
lens unit)
(required in an RSPF model when replacing the
lens unit)
SIM63-7
(15)
RSPF scan position auto adjustment
SIM53-8
C
Image density
(exposure) adjustment
(exposure) adjustment
(1)
Copy mode
SIM46-2
Developing doctor gap
F/R both ends (20mm from the both ends):1.5
+0.1mm
-0.15mm
C (Center)(150mm from the both ends):
1.55
+0.15mm
-0.2mm
20mm
10mm
150mm
10mm
20mm
F
C
R
DG:1.5
+0.1
- 0.15
DG:1.5
+0.1
- 0.15
DG:1.55
+0.15
- 0.2
A
AR-M236/M276/M237/M277 ADJUSTMENTS 7 - 2
(3) Developing bias voltage adjustment (SIM 8-1)
1) Execute SIM 8-1.
2) Touch the exposure mode to be changed.
The current set value is displayed.
3) Enter the set value with the 10-key.
4) Press the [START] key.
Output is made with the entered value, and the display returns to
the original state.
the original state.
<Adjustment specification>
(4) Grid bias voltage adjustment (High mode) (SIM 8-2)
1) Execute SIM 8-2.
2) Touch the exposure mode to be changed.
The current set value is displayed.
3) Enter the set value with the 10-key.
4) Press the [START] key.
Output is made with the entered value for 30sec, and the display
returns to the original state.
returns to the original state.
<Adjustment specification>
Min. unit: –25V increment
(5) Grid bias voltage adjustment (Low mode) (SIM 8-3)
1) Execute SIM 8-3.
2) Touch the exposure mode to be changed.
The current set value is highlighted.
3) Enter the set value with the 10-key.
4) Press the [START] key.
Output is made with the entered value for 30sec, and the display
returns to the original state.
returns to the original state.
<Adjustment specification>
Min. unit: -25V increment
B. Mechanism section
(1) Print start position adjustment
1) Execute SIM 50-5.
2) Touch the item to be adjusted.
The item and the currently set value are highlighted.
3) Press the [START] key.
The display is shifted to the copy menu.
4) Select the paper feed tray and the print density.
Enter the adjustment value with the 10-key.
5) Press the [START] key.
Copying is started.
6) Measure the distance H between the paper lead edge and the
image print start position. Set the image print start position set
value again.
value again.
• 1 step of the set value corresponds to about 0.127mm shift.
• Calculate the set value from the formula below.
99 – H/0.127 (mm) = Image print start position set value <H:
Print start position measurement value (mm)>
Print start position measurement value (mm)>
∗
Fit the print edge with the paper edge, and perform the lead
edge adjustment.
edge adjustment.
Example:99 – 5/0.127 = 99 – 39.4 = about 59
Note: FIf the set value is not obtained from the above formula, per-
Note: FIf the set value is not obtained from the above formula, per-
form the fine adjustment.
Item
Content
Installation
range
Default
1
AE
AE
200-550
400 (–400V)
2
TEXT
Character
450 (–450V)
3
TEXT/PHOTO
Character/Photo
450 (–450V)
4
PHOTO
Photo
450 (–450V)
5
SUPER/PHOTO
Super photo
400 (–400V)
6
TONER SAVE
Toner save
376 (–376V)
Item
Content
Setting
range
Default
1
AE
AE
1-8
3 (–530V)
2
TEXT
Character
5 (–580V)
3
TEXT/PHOTO
Character/Photo
5 (–580V)
4
PHOTO
Photo
5 (–580V)
5
SUPER/PHOTO
Super photo
3 (–530V)
6
TONER SAVE
Toner save
2 (–505V)
Item
Content
Setting
range
Default
1
AE
AE
1-8
3 (–400V)
2
TEXT
Character
5 (–450V)
3
TEXT/PHOTO
Character/Photo
5 (–450V)
4
PHOTO
Photo
5 (–450V)
5
SUPER/PHOTO
Super photo
3 (–400V)
6
TONER SAVE
Toner save
2 (–375V)
Item
Content
Setting range
Default
1
TRAY1
1st cassette
0-99
53
2
OPTION
Option cassette
1-99
3
MANUAL
Manual feed
4
DUPLEX
Back print
5
10
0mm
0mm
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