Sharp AR-M256 (serv.man11) Service Manual ▷ View online
AR-M256/M257/M258/M316/M317/M318/5625/5631 DISASSEMBLY, ASSEMBLY AND MAINTENANCE 10 - 1
[10] DISASSEMBLY, ASSEMBLY AND MAINTENANCE
1. Maintenance table
(For 25cpm)
✕: Check (Check, clean, replace or adjust according to necessity.)
❍: Cleaning ▲: Replace ✩: Lubricate
❍: Cleaning ▲: Replace ✩: Lubricate
Unit
Parts
75k
150k
225k
300k
375k
450k
525k
600k
Note
Process unit
Drum
▲
▲
▲
▲
▲
▲
▲
▲
Cleaner blade
▲
▲
▲
▲
▲
▲
▲
▲
Seal F/R
✕
✕
✕
✕
✕
✕
✕
✕
Drum frame unit
(Toner reception sheet)
(Toner reception sheet)
✕
✕
▲
✕
✕
▲
✕
✕
Usable for three PM cycles
MC unit
▲
▲
▲
▲
▲
▲
▲
▲
Separation pawl unit
✕
▲
✕
▲
✕
▲
✕
▲
Star ring
▲
▲
▲
▲
▲
▲
▲
▲
DV unit
Developer
▲
▲
▲
▲
▲
▲
▲
▲
DV blade
✕
▲
✕
▲
✕
▲
✕
▲
DV side seal N
✕
▲
✕
▲
✕
▲
✕
▲
DV side seal N2
✕
▲
✕
▲
✕
▲
✕
▲
DV side mylar
✕
▲
✕
▲
✕
▲
✕
▲
DV moquette
✕
✕
✕
✕
✕
✕
✕
✕
Toner sensor
✕
✕
✕
✕
✕
✕
✕
✕
Fusing unit
Fusing unit
✕
▲
✕
▲
✕
▲
✕
▲
Upper heat roller
❍
▲
❍
▲
❍
▲
❍
▲
Lower heat roller
❍
❍
❍
▲
❍
❍
❍
▲
Upper separation pawl
❍
▲
❍
▲
❍
▲
❍
▲
Upper cleaning pad
✕
▲
✕
▲
✕
▲
✕
▲
Lower separation pawl
❍
❍
❍
▲
❍
❍
❍
▲
Thermistor
❍
❍
❍
❍
❍
❍
❍
❍
Fuser gear
✩
▲
✩
▲
✩
▲
✩
▲
Upper heat roller bearing
✕
▲
✕
▲
✕
▲
✕
▲
Lower fuser bearing
✕
✕
✕
▲
✕
✕
✕
▲
Paper guide
❍
❍
❍
❍
❍
❍
❍
❍
Paper feed
Pickup roller
✕
✕
✕
✕
✕
✕
✕
✕
Changing criteria for parts: 100k
Paper feeding sheet
✕
✕
✕
✕
✕
✕
✕
✕
Pickup roller and feed roller
(RSPF)
(RSPF)
✕
✕
✕
✕
✕
✕
✕
✕
Transport unit Transport roller unit
❍
▲
❍
▲
❍
▲
❍
▲
Gear
✕
–
✕
–
✕
–
✕
–
Others
Paper feed rollers
❍
❍
❍
❍
❍
❍
❍
❍
Gears
✩
✩
✩
✩
✩
✩
✩
✩
Ozone filter
▲
▲
▲
▲
▲
▲
▲
▲
AR-M256/M257/M258/M316/M317/M318/5625/5631 DISASSEMBLY, ASSEMBLY AND MAINTENANCE 10 - 2
(For 31cpm)
✕: Check (Check, clean, replace or adjust according to necessity.)
❍: Cleaning ▲: Replace ✩: Lubricate
❍: Cleaning ▲: Replace ✩: Lubricate
Unit
Parts
100k
150k
200k
300k
400k
450k
500k
600k
Note
Process unit
Drum
▲
✕
▲
▲
▲
✕
▲
▲
75k (Except SEC/SECL/LAG)
Cleaner blade
▲
✕
▲
▲
▲
✕
▲
▲
Seal F/R
✕
✕
✕
✕
✕
✕
✕
✕
Drum frame unit
(Toner reception sheet)
(Toner reception sheet)
✕
✕
✕
▲
✕
✕
✕
▲
Usable for three PM cycles
MC unit
▲
✕
▲
▲
▲
✕
▲
▲
Separation pawl unit
✕
▲
✕
▲
✕
▲
✕
▲
Star ring
▲
▲
▲
▲
▲
▲
▲
▲
DV unit
Developer
▲
✕
▲
▲
▲
✕
▲
▲
75k (Except SEC/SECL/LAG)
DV blade
✕
▲
✕
▲
✕
▲
✕
▲
DV side seal N
✕
▲
✕
▲
✕
▲
✕
▲
DV side seal N2
✕
▲
✕
▲
✕
▲
✕
▲
DV side mylar
✕
▲
✕
▲
✕
▲
✕
▲
DV moquette
✕
✕
✕
✕
✕
✕
✕
✕
Toner sensor
✕
✕
✕
✕
✕
✕
✕
✕
Fusing unit
Fusing unit
✕
▲
✕
▲
✕
▲
✕
▲
Upper heat roller
❍
▲
❍
▲
❍
▲
❍
▲
Lower heat roller
❍
❍
❍
▲
❍
❍
❍
▲
Upper separation pawl
❍
▲
❍
▲
❍
▲
❍
▲
Upper cleaning pad
✕
▲
✕
▲
✕
▲
✕
▲
Lower separation pawl
❍
❍
❍
▲
❍
❍
❍
▲
Thermistor
❍
❍
❍
❍
❍
❍
❍
❍
Fuser gear
✩
▲
✩
▲
✩
▲
✩
▲
Upper heat roller bearing
✕
▲
✕
▲
✕
▲
✕
▲
Lower fuser bearing
✕
✕
✕
▲
✕
✕
✕
▲
Paper guide
❍
❍
❍
❍
❍
❍
❍
❍
Paper feed
Pickup roller
✕
✕
✕
✕
✕
✕
✕
✕
Changing criteria for parts: 100k
Paper feeding sheet
✕
✕
✕
✕
✕
✕
✕
✕
Pickup roller and feed roller
(RSPF)
(RSPF)
✕
✕
✕
✕
✕
✕
✕
✕
Transport unit Transport roller unit
❍
▲
❍
▲
❍
▲
❍
▲
Gear
✕
–
✕
–
✕
–
✕
–
Others
Paper feed rollers
❍
❍
❍
❍
❍
❍
❍
❍
Gears
✩
✩
✩
✩
✩
✩
✩
✩
Ozone filter
▲
▲
▲
▲
▲
▲
▲
▲
AR-M256/M257/M258/M316/M317/M318/5625/5631 DISASSEMBLY, ASSEMBLY AND MAINTENANCE 10 - 3
2. Counter clear
∗
31 sheet model: When maintenance message is displayed, replace
consumption part reaching the number of sheets of maintenance,
then clear the replaced part's counter only.
consumption part reaching the number of sheets of maintenance,
then clear the replaced part's counter only.
3. List of disassembly and assembly
Item
SIM
Remarks
Maintenance cycle setting
SIM 21-1
Jam/trouble counter clear
SIM 24-1
Paper feed counter clear
SIM 24-2
Scan/Stapler/Punch/Saddle
stitch counter clear
stitch counter clear
SIM 24-3
Maintenance counter clear
SIM 24-4 *
Developing counter clear
SIM 24-5 At developer replacement
Copy counter clear
SIM 24-6
Drum counter clear
SIM 24-7 At drum replacement
Printer, IMC, Duplex, other
counter clear
counter clear
SIM 24-9
FAX counter clear
SIM 24-10
Scanner mode counter clear SIM 24-15
Unit
Parts
A. Process unit
(1) Drum
(2) Drum section
a. Main charger
b.
Cleaning blade
c.
Drum frame unit
d.
Moquette F/R
e.
Separation pawl
B. Developing unit
(1) Developer
(2) DV seal/side seal N/side seal N2/side
mylar
C. Fusing unit
(1) Thermostat
(2) Thermistor
(3) Paper guide
(3) Paper guide
(4) Fusing Separation Pawl (lower)
(5) Lower heat roller
(6) Heater lamp
(6) Heater lamp
(7) Fusing Separation Pawl (upper)
(8) Upper heat roller
D. Optical section
(1) CCD unit
(2) Lamp unit
a.
Lamp
b.
PWB
c.
Wire
d.
Mirror motor
E. Paper feed
section
section
(1) Paper feed solenoid
(2) Cassette sensor PWB
(3) Manual P-in sensor/Manual empty sensor
(4) Multi manual
(4) Multi manual
paper feed
a.
Paper feed roller/
pickup roller
pickup roller
b.
Reverse sensor
c.
Separation sheet
d.
Clutch/solenoid
(5) Upper 500
sheets tray
paper feed
paper feed
a.
Paper feed roller/
pickup roller
pickup roller
b.
Separation sheet
(6) Lower 500
sheets tray
paper feed
paper feed
a.
Paper feed roller/
pickup roller
pickup roller
b.
Separation sheet
c.
Lift up unit
d.
Transport clutch
e.
Paper feed clutch
f.
Transport clutch
g.
Solenoid
h.
Sensor PWB
I.
Dehumidification
heater
heater
F. Side door unit
(1) Transport roller unit
(2) Transport roller
(3) DUP transport roller
(3) DUP transport roller
(4) DUP motor
G. 1st paper exit
unit
unit
(1) Exit roller
(2) Cooling fan
(2) Cooling fan
H. 2nd paper exit
unit
unit
(1) Switch
(2) Sensor
(3) Roller
(3) Roller
I. Laser unit
(1) LSU
J. Power unit
(1) Power source
K. PWB
(1) Option CN PWB
(2) IMC PWB
(3) MCU PWB
(4) Motherboard PWB
(4) Motherboard PWB
(5) Second interface PWB
L. Ozone filter
M. Drive section
M. Drive section
(1) DUP reverse motor
(2) Main drive motor
(3) Toner motor
(4) Drive unit
(4) Drive unit
(5) PS transport clutch
(6) Paper feed clutch
(7) Lift up motor
(7) Lift up motor
N. Transport section
(1) Transport roller
O. Operation
section
section
(1) Operation section
(2) OPU PWB
(2) OPU PWB
(3) Key PWB
(4) LCD unit
P. Switch
(1) Power switch/
Unit
Parts
AR-M256/M257/M258/M316/M317/M318/5625/5631 DISASSEMBLY, ASSEMBLY AND MAINTENANCE 10 - 4
4. Details of disassembly and assembly
A. Process unit
(1) Drum
Note: When installing the process unit in the main unit after replacing
the drum, process unit may not be able to install by reason of the
drum drive coupling position.
In this case, rotate the drum about 45 degrees and install again.
drum drive coupling position.
In this case, rotate the drum about 45 degrees and install again.
(2) Drum section
a. Main charger
b. Cleaning blade
c. Drum frame unit
d. Moquette F/R
Note: If it disturbs the blade movement, replace it and attach new one.
e. Separation pawl
Disassembly* Hold the tip of the separation pawl and remove it.
2
1
4
3
1
2
4
3
1
1
2
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