DOWNLOAD Sharp AR-M351U / AR-M451U (serv.man12) Service Manual ↓ Size: 1.29 MB | Pages: 12 in PDF or view online for FREE

Model
AR-M351U AR-M451U (serv.man12)
Pages
12
Size
1.29 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Maintenance details of following sections, 2-Fuser, 3-Paper Feed
File
ar-m351u-ar-m451u-sm12.pdf
Date

Sharp AR-M351U / AR-M451U (serv.man12) Service Manual ▷ View online

AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 23
The fusing heat roller (heating) is provided with two heater lamps,
which heat the fusing roller to fuse toner onto paper.
The fusing rollers (pressing) are of silicon rubber because of the
following reasons and purpose.
1) Paper is separated upward. (Since the fusing roller (heating) is
of higher hardness, the fusing roller (pressing) is deformed to
separate paper upward.)
2) The nip quantity is increased to increase heat capacity for
paper.
3) By pressing paper with the flexible roller, toner is fused without
deformation.
(4) Fusing temperature control
The temperature sensor is provided at the center of the fusing
roller (heating).
The roller temperature is detected by the installed temperature
sensor, and the heater lamp is controlled so that the temperature
is maintained at the specified level.
In addition, the fusing temperature is switched according to the
kind of paper.
(5) Cleaning roller
The fusing section cleaning roller of this machine is made of the
blast process.
1) Remaining toner attaches to the upper heat roller.
2) Due to coating and the temperature characteristics of the
upper heat roller, toner is not attached to the upper heat roller
but to the lower heat roller.
3) Remaining toner on the lower heat roller is further attached to
the cleaning roller due to the temperature characteristics and
the difference in roughness of surfaces of the rollers.
4) Remaining toner attached to the cleaning roller is accumulated
until the roller is replaced.
D. Maintenance and parts replacement
(1) Maintenance list
Mode
Fusing roller
AR-M351U/
M355U
AR-M451U/
M455U
Ready condition 
print mode
Plain paper
190°C
190°C
Heavy Paper
190°C
190°C
Postcard
190°C
190°C
Envelope
190°C
190°C
Pre-heat
150°C
150°C
Unit name
No.
Part name
When 
calling
100K
200K
300K
400K
500K
600K
700K
800K
Remark
Fusing 
section
1
Upper heat roller
2
Lower heat roller
3
Upper separation pawl
4
Lower separation pawl
5
Thermistor
Clean and remove 
paper dust.
6
Upper heat roller gear
7
CL roller
8
CL roller bearing
9
Paper guides
10
Gears
5
3
4
1
6
5
8
2
7
8
AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 24
(2) Maintenance and parts replacement
a. Fusing unit
1) Pull out the left door.
2) Remove the stopper R.
3) Pull the fusing lever, and remove the fusing unit.
a-1. Lower separation pawl
1) Remove the fusing unit.
2) Open the fusing rear lower PG, and remove the lower separa-
tion pawl.
a-2. Upper separation pawl
1) Remove the fusing unit.
2) Remove the rear upper PG, and remove the upper separation
pawl.
No.
Unit
Parts
a
Fusing unit
1
Lower separation pawl
2
Upper separation pawl
3
Thermistor
4
Lower heat roller
5
CL roller
6
CL roller bearing
7
Heater lamp
8
Upper heat roller
9
Upper heat roller gear
10
Thermostat
a-1
a-3
a-2
a-6
a-3
a-10
a-4
a-8
a-9
a
a-6
a-5
a-7
AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 25
a-3. Thermistor
1) Remove the fusing unit.
2) Remove the screw, and remove the fusing drawer. Remove
the connector.
3) Remove the screw, and remove the thermistor.
a-4. Lower heat roller
1) Remove the fusing unit.
2) Release pressure with the pressure adjustment lever.
3) Remove the screw, and open the fusing unit.
4) Open the fusing rear lower PG.
5) Remove the lower heat roller, and remove the lower heat roller
bearing.
a-5. CL roller
a-6. CL roller bearing
1) Remove the fusing unit.
2) Remove the lower heat roller.
3) Remove the CL roller, and remove the CL roller bearing.
a-7. Heater lamp
1) Remove the fusing unit.
2) Open the fusing unit.
3) Remove the screw, and remove the heater lamp.
Be careful not to mistake the installing position of the heater
lamp.
When installing, loosen the screws on the front side 
 (drawer
ON side) then the screws on the rear side 
 (gear side) in this
sequence.
Check to confirm again that the screws are tighten securely. (If
any screw is loosened, a bad contact may cause heating.)
AR-M351U/M451U, AR-M355U/M455U  MAINTENANCE AND DETAILS OF EACH SECTION  7 - 26
a-8. Upper heat roller
a-9. Upper heat roller gear
1) Remove the fusing unit.
2) Open the fusing unit.
3) Remove the fusing rear upper PG.
4) Remove the heater lamp.
5) Remove the upper heat roller, the roller stopper. The upper
heat roller gear, and the upper heat roller bearing.
a-10. Thermostat
1) Remove the fusing unit.
2) Open the fusing unit.
3) Remove the fusing rear upper PG.
4) Remove the heater lamp.
5) Remove the upper heat roller.
6) Remove the screw, and remove the electrode plate and the
thermostat.
When installing, check to confirm that the screws are securely
tighten again. (If any screw is loosened, a bad contact may
cause heating.)
3. Paper feed section
A. General
This section picks up paper in the cassette and feed it to the trans-
port roller section.
The capacity of the paper feed tray is 550 sheets for 64g/m
2
 or
500 sheets for 80g/m
2
.
There are three kinds of the paper feed desk: 3-stage paper feed
desk (AR-D27), 2-stage paper feed desk (AR-D28), and 1-stage
paper fed desk (AR-MU2). For details, refer to the AR-D27/D28/
MU2 Service Manual. 
Page of 12
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Sharp AR-M351U / AR-M451U (serv.man12) Service Manual ▷ Download

  • DOWNLOAD Sharp AR-M351U / AR-M451U (serv.man12) Service Manual ↓ Size: 1.29 MB | Pages: 12 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp AR-M351U / AR-M451U (serv.man12) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp AR-M351U / AR-M451U (serv.man12) Copying Equipment. Information contained in Sharp AR-M351U / AR-M451U (serv.man12) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.