Sharp MX-M350N / MX-M350U / MX-M450N / MX-M450U (serv.man12) Service Manual ▷ View online
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 1
[7] MAINTENANCE AND DETAILS OF EACH SECTION
• Self print of set values
Use of SIM 22-6 allows to print the set values and the jam his-
tory of the machine.
These values must be printed before execution of maintenance
or disassembly procedures.
tory of the machine.
These values must be printed before execution of maintenance
or disassembly procedures.
• When assembling, check that the flat cable and the harness
connectors are securely connected.
• When connecting the flat cable, be careful not to break the pins.
When installing the PWB unit and the memory module, use a
Ground Strap to prevent damage caused by electrical dis-
charge.
Ground Strap to prevent damage caused by electrical dis-
charge.
[Maintenance System Table]
1. Engine section
Maintenance cycle : 200K
✕ Check (Clean, replace, or adjust as necessary.) ❍ Clean
▲ Replace
∆
Adjust
✩ Lubricate
❏ Move position
Unit name
Part name
When
calling
100K 200K 300K 400K 500K 600K 700K 800K
Remark
Drum peripheral
Drum
✕
▲
✕
▲
✕
▲
✕
▲
Cleaner blade
✕
▲
✕
▲
✕
▲
✕
▲
Replace at 200K or 1 year.
P/G No.: [10]-49
P/G No.: [10]-49
Toner reception seal
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [10]-42
Side molt F
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [10]-33
Side molt R
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [10]-37
Transfer roller
✕
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [5]-8
Discharge plate
✕
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [5]-2
TR bearing (F/R)
✕
✕
✕
▲
✕
✕
✕
▲
P/G No.: [5]-9, 18
Transfer roller collar
✕
✕
✕
▲
✕
✕
✕
▲
P/G No.: [5]-10
After-transfer star ring
✕
✕
✕
✕
✕
✕
✕
✕
P/G No.: [5]-19
TR gear
✕
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [5]-15
Drum separation pawl unit
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [5]-501
MC unit
✕
❍
▲
❍
▲
❍
▲
❍
▲
Includes the screen grid, the
charging plate, and the MC
cleaner.
❍: Charging plate cleaning by
the MC cleaner
P/G No.: [9]-901
charging plate, and the MC
cleaner.
❍: Charging plate cleaning by
the MC cleaner
P/G No.: [9]-901
Paper guide
❍
❍
❍
❍
❍
❍
❍
❍
❍
Developing
section
section
Developer
▲
▲
▲
▲
▲
▲
▲
▲
Supplied when installing
DV blade
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [11]-55
DSD collar
❍
❍
❍
❍
❍
❍
❍
❍
DV side seal F
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [11]-38
DV side seal R
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [11]-43
Toner cartridge
–
–
–
–
–
–
–
–
Attached when installing./
750g, user replacement for every
35K.
750g, user replacement for every
35K.
Fusing section
Upper heat roller
✕
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [7]-46
Lower heat roller
✕
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [7]-22
Upper separation pawl
❍
❍
▲
❍
▲
❍
▲
❍
▲
P/G No.: [7]-3
Lower separation pawl
❍
❍
▲
❍
▲
❍
▲
❍
▲
P/G No.: [7]-41
Thermistor
✕
✕
✕
✕
✕
✕
✕
✕
✕
Clean and remove paper dust.
Upper heat roller gear
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [7]-47
Paper guides
❍
❍
❍
❍
❍
❍
❍
❍
❍
Gears
✩
✩
✩
✩
✩
✩
✩
✩
CL roller
✕
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [7]-52
CL roller bearing
✕
✕
▲
✕
▲
✕
▲
✕
▲
P/G No.: [7]-53
Filters
Ozone filter
▲
▲
▲
▲
▲
▲
▲
▲
P/G No.: [12]-2
Paper feed
section
section
Pick-up roller
✕
✕
✕
✕
✕
✕
✕
✕
✕
Note 1
Paper feed roller
✕
✕
✕
✕
✕
✕
✕
✕
✕
Note 1
Separation roller
✕
✕
✕
✕
✕
✕
✕
✕
✕
Note 1
Torque limiter
✕
✕
✕
✕
✕
✕
✕
✕
✕
Note 1
Transport section
Paper exit
reverse section
Paper exit
reverse section
Resist roller
✕
❍
❍
❍
❍
❍
❍
❍
❍
Transport rollers
✕
❍
❍
❍
❍
❍
❍
❍
❍
Transport paper guides
❍
❍
❍
❍
❍
❍
❍
❍
❍
Paper dust remover unit
❍
❍
▲
❍
▲
❍
▲
❍
▲
P/G No.: [14]-51
Optical reflection sensor
❍
❍
❍
❍
❍
❍
❍
❍
❍
PS roller unit section
Drive section
Gears (Specified position)
✕
✩
✩
✩
✩
✩
✩
✩
✩
Belts
✕
✕
✕
✕
✕
✕
✕
✕
✕
Image quality
✕
✕
✕
✕
✕
✕
✕
✕
✕
Other
Sensors
✕
✕
✕
✕
✕
✕
✕
✕
Clean with air.
Note 1: Replacement reference: Use the counter value of each paper feed port as the replacement reference.
Paper feed roller/Separation pad/Torque limiter section (Include Desk, Multi purpose): 100K or 1 year
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 2
2. Scanner / DSPF
Maintenance cycle : 200K
✕ Check (Clean, replace, or adjust as necessary.) ❍ Clean
▲ Replace
∆
Adjust
✩ Lubricate
❏ Move position
Unit name
Part name
When
calling
100K 200K 300K 400K 500K 600K 700K 800K
Remark
Optical
section
section
Mirror/Lens/Reflector/Sensors
❍
❍
❍
❍
❍
❍
❍
❍
❍
Table glass/Dust-proof glass/OC
❍
❍
❍
❍
❍
❍
❍
❍
❍
White reference glass
❍
❍
❍
❍
❍
❍
❍
❍
❍
Rails
✩
✩
✩
✩
✩
✩
✩
✩
Drive belt/Drive wire/Pulley
✕
✕
✕
✕
✕
✕
✕
✕
DSPF
Paper feed
section
section
Pick-up roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
Note 2
Paper feed roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
Note 2
Separation mylar lower
❍
❍
❍
❍
❍
❍
❍
❍
❍
Note 2
Separation pad
❍
❍
❍
❍
❍
❍
❍
❍
❍
Note 2
Transport section PS roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
Exposure section
(Dust-proof glass)
(Dust-proof glass)
❍
❍
❍
❍
❍
❍
❍
❍
❍
Paper exit
section
section
Paper exit roller
❍
❍
❍
❍
❍
❍
❍
❍
❍
Other
Sensors
❍
❍
❍
❍
❍
❍
❍
❍
Clean with air.
Note 2: Replacement reference: Replace by using the SPF counter value as an indication.
Paper feed section pickup roller, paper feed roller, separation pad, separation lower mylar lower:
100K or 1 year
100K or 1 year
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 3
3. Peripheral devices
Maintenance cycle : 50K
✕ Check (Clean, replace, or adjust as necessary.) ❍ Clean
▲ Replace
∆
Adjust
✩ Lubricate
❏ Move position
Option name
Part name
When
calling
100K 200K 300K 400K 500K 600K 700K 800K
Remark
Finisher
Transport section
Transport rollers
❍
❍
❍
❍
❍
❍
❍
❍
❍
De-curler roller
(❍)✕
❍
❍
❍
❍
❍
❍
❍
❍
Transport paper
guides
guides
✕
❍
❍
❍
❍
❍
❍
❍
❍
Drive section
Gears
✕
✩
✩
✩
✩
✩
✩
✩
✩
(Specified position)
Belts
✕
✕
✕
✕
✕
✕
✕
✕
✕
Other
Sensors
✕
✕
✕
✕
✕
✕
✕
✕
✕
Discharge brush
✕
✕
✕
✕
✕
✕
✕
✕
✕
Staple unit
Replace unit
at 200K staple.
at 200K staple.
Staple cartridge
User replacement
for every 3000 pcs.
for every 3000 pcs.
Mail-bin
stacker
stacker
Transport section
Transport rollers
✕
❍
❍
❍
❍
❍
❍
❍
❍
Transport paper
guides
guides
✕
❍
❍
❍
❍
❍
❍
❍
❍
Drive section
Gears
✕
✩
✩
✩
✩
✩
✩
✩
✩
(Specified position)
Belts
✕
✕
✕
✕
✕
✕
✕
✕
✕
Other
Sensors
✕
✕
✕
✕
✕
✕
✕
✕
✕
Discharge brush
✕
✕
✕
✕
✕
✕
✕
✕
✕
Saddle finisher,
punch unit
punch unit
Transport section
Transport rollers
✕
❍
❍
❍
❍
❍
❍
❍
❍
Transport paper
guides
guides
✕
❍
❍
❍
❍
❍
❍
❍
❍
Drive section
Gears
✕
✩
✩
✩
✩
✩
✩
✩
✩
(Specified position)
Belts
✕
✕
✕
✕
✕
✕
✕
✕
✕
Other
Sensors
✕
✕
✕
✕
✕
✕
✕
✕
✕
Discharge brush
✕
✕
✕
✕
✕
✕
✕
✕
✕
Staple unit
Replace unit at 300K
staple.
staple.
Staple cartridge
User replacement
for every 5000 pcs.
for every 5000 pcs.
Punch unit
Replace unit at
1000K.
1000K.
ADU
+ Manual feed
+ Manual feed
Paper feed
separation section
separation section
Paper feed
rollers
rollers
(❍)✕
(❍)✕ (❍)✕ (❍)✕ (❍)✕ (❍)✕ (❍)✕ (❍)✕ (❍)✕ Note 3
Transport section
Transport rollers
✕
❍
❍
❍
❍
❍
❍
❍
❍
Transport paper
guides
guides
✕
❍
❍
❍
❍
❍
❍
❍
❍
Drive section
Gears
✕
✩
✩
✩
✩
✩
✩
✩
✩
(Specified position)
Belts
✕
✕
✕
✕
✕
✕
✕
✕
✕
Other
Sensors
✕
✕
✕
✕
✕
✕
✕
✕
✕
Note 3: Replacement reference: Use the counter value of each paper feed port as the replacement reference.
Paper feed section pickup roller, paper feed roller, separation pad: 100K or 1 year
MX-M350/M450 N/U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 4
[DETAILS OF EACH SECTION]
1. Process section
A. General
Toner is attached to electrostatic latent images formed by the laser
beams which were radiated to the OPC drum charged by the main
charger, forming toner images.
beams which were radiated to the OPC drum charged by the main
charger, forming toner images.
The toner images formed on the OPC drum are transferred to
paper by the transfer roller.
paper by the transfer roller.
1
2
4
5
3
No.
Name
Operation
1
Toner cartridge
Supplies toner to the developing unit, and collects waste toner.
2
Developer unit
Mixes toner and carrier, and attaches toner to electrostatic latent images to form visible images.
3
Transfer roller
Transfers toner to the paper.
4
Process drum unit
The electrostatic image formed by the laser on the drum comes in contact with the developer to
form the visible image on the OPC drum.
form the visible image on the OPC drum.
5
Main charger unit
Charges the drum evenly with a negative charge.