DOWNLOAD Sharp AR-M700 (serv.man21) Service Manual ↓ Size: 2.86 MB | Pages: 12 in PDF or view online for FREE

Model
AR-M700 (serv.man21)
Pages
12
Size
2.86 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Details of each section - 6 Fusing section
File
ar-m700-sm21.pdf
Date

Sharp AR-M700 (serv.man21) Service Manual ▷ View online

: Feb. 6 2004
1
AR-M550/M620/M700  DETAILS OF EACH SECTION  6 - 101
6. Fusing section
A.
General
This section performs the following functions and operations. 
1) Toner attached to paper in the transfer section are heated and
pressed onto paper to fuse. 
2) The auxiliary heat roller is used to improve fusing capacity and
separation capacity after fusing.
B. Major parts and signal functions
AR-M550N/U, AR-M620N/U
Copy
Paper
exit
Fusing roller 
(Heating)
Sub power PWB
Fusing 
motor
Paper exit 
roller
Heater lamps 
(2 pcs.)
Fusing roller 
(Pressing)
Cleaning 
scraper
Auxiliary 
heat roller
Heat lamp 
(1 pc)
Fusing
1
1
Drawer connector
RTH1 GND2 RTH2 GND2 RTH3 GND2 (NC)
(NC)
(NC)
HL-2L HL-1N HL-2N HL-3N HL-3L HL-1L
1
2
3
4
5
6
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
RTH1
RTH2
RTH3
HLTS1
HLTS2
HL1
HL2
FUM
HL3
HLTS3
1
2
3
4
5
6
1
2
3
4
5
6
+12VS
GND2 AC-MON FW-SUB HLCNT3
GND2
+24VPR HLPR12
GND2 HLCNT2 HLCNT1 GND2
CN-4
CN-3
CN-1
CN-2
HL1-N HL3-L HL2-L
HL1-L HL2-N HL3-N
1
2
3
1
2
3
1
+12VS
CN-1
2
GND2
3
AC-MON
4
FW-SUB
5
HLCNT3
6
GND2
1
GND2
CN-2
2
+24VPR
3
GND2
4
GND2
5
HLPR12
6
RTH1
7
HLPR3
8
GND2
9
HLCNT1
10
RTH2
11
HLCNT2
12
GND2
13
+24V1
14
RTH3
15
/MSWPR
16
GND2
1 RTH1 1
2 GND2 2
3 RTH2 3
4 GND2 4
5 RTH3 5
6 GND2 6
7 (NC)
7
8 (NC)
8
9 (NC)
9
B
B
W
W
W
B
9
4
1
4pin
3pin
6pin
1pin
5pin
2pin
Cross-
sectional 
view of 
connector
1
2
2
1
1
2
3
4
4
3
2
1
A
B
A
B
PCU
4
3
1
8
7
5
2
Sub power PWB
2
9
8
7
6
5
4
3
2
1
: Feb. 6 2004
1
AR-M550/M620/M700  DETAILS OF EACH SECTION  6 - 102
AR-M700N/U
Code
Signal 
name
Name
Type
Function/Operation
Active condition
Note
RTH1
RTH1
Fusing temperature 
sensor (1)
Thermistor Detects the surface temperature of the fusing roller 
(heating). (Center section)
Analog input
RTH2
RTH2
Fusing temperature 
sensor (2)
Thermistor Detects the surface temperature of the fusing roller 
(heating). (Edge section)
Analog input
HLTS1
HLTS1
Thermostat (1)
Shuts conduction to the heater lamp when the temperature 
rises abnormally. [For the fusing roller (heating)]
HLTS2
HLTS2
Thermostat (2)
Shuts conduction to the heater lamp when the temperature 
rises abnormally. [For the fusing roller (heating)]
HL1
HL1
Heater lamp (1)
Heats the fusing roller (heating).
HL2
HL2
Heater lamp (2)
Heats the fusing roller (heating).
RTH3
RTH3
Fusing temperature 
sensor (3)
Thermistor Detects the surface temperature of the auxiliary heat roller. 
HLTS3
HLTS3
Thermostat (3)
Shuts conduction to the heater lamp when the temperature 
rises abnormally. [For the auxiliary heat roller]
Analog input
HL3
HL3
Heater lamp (3)
Heats the auxiliary heat roller.
FUM
FUM
Fusing motor
Drives the fusing unit.
No.
Name
Function/Operation
Active 
condition
Note
1
Fusing roller (heating)
Heats toner on paper and fuses it on paper. 
2
Separation pawl
Mechanically separates paper which was not separated naturally from the 
fusing roller (heating).
3
Fusing roller (pressing)
Heats and presses toner on paper. 
4
Auxiliary heat roller
Heats the fusing roller (pressing).
5
Separation pawl
Mechanically separates paper which was not separated naturally from the 
fusing roller (heating).
1
RT H1
RTH2
RTH 3
HLTS1
HLTS2
HL1
HL
FUM
2
HL3
HLTS3
1
2
2
1
1
2
3
4
4
3
2
1
A
B
A
B
PCU
4
8
10
3
9
1
5
2
2
Drawer connector
Cross-
sectional 
view of 
connector
Sub power PWB
1
1
: Feb. 6 2004
1
AR-M550/M620/M700  DETAILS OF EACH SECTION  6 - 103
C. Details of operations
(1) Fusing unit drive
To drive the fusing unit, the drive power is transmitted from the drive
motor (FUM) through the connection gear to the upper heat roller gear. 
The drive motor DC brushless motor is driven according to the control
signal sent from the PCU.
(2) Heater lamp drive
The surface temperature of the heat roller detected by the thermistor is
sent to the PCU.
When the temperature is lower than the specified level, the heater
lamp lighting signal is sent from the PCU to the heater lamp drive cir-
cuit in the sub power PWB.
The power triac in the heater lamp drive circuit is turned on, and the AC
power is supplied to the heater lamp, lighting the lamp and heating the
heat roller.
To prepare for an abnormally high temperature of the heat roller, the
thermostat is provided for safety.
When the thermostat is opened, power supply (AC line) to the heater
lamp is cut off.
(3) Fusing operation
Toner on paper is heated and pressed to be fused by the heat roller.
Two heater lamps are provided for the fusing heat roller (heating) and
one heater lamp is provided for the auxiliary heat roller for the fusing
roller (pressing) to heat paper from above and below.
This is because toner on paper must be heated from above and below
to be fused on paper.
1) Paper is separated upward. (Since the fusing roller (heating) is of
higher hardness, the fusing roller (pressing) is deformed to sepa-
rate 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. (The flatness, however, is not so high.)
(4) Fusing temperature control
The temperature sensor is provided at the center of the fusing roller
(heating) and the auxiliary heat roller.
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 operation
The fusing roller removes toner and dusts from the heat roller and the
pressure roller surfaces by the following two methods.
1.
Sub-heat roller (Heating): Clean the sub heat roller with the clean-
ing sheet.
7
Fusing cleaning scraper
Cleans the surface of the fusing roller (pressing).
(AR-M550N/U, 
AR-M620N/U)
8
Cleaning sheet
Clean the sub heat roller surface.
9
Oil roller
Apply oil to the fusing roller.
(AR-M700N/U)
10
Cleaning plate
Clean the fusing (pressure) roller surface.
(AR-M700N/U)
No.
Name
Function/Operation
Active 
condition
Note
1
1
1
FUM
PCU
1
Fusing roller (Heating)
HL2
HL1
---------
---------
Fusing roller (Pressing)
HL3
Auxiliary heat roller
Paper exit
The fusing rollers (pressing) are of silicon rubber because of the follow-
ing reasons and purpose.
Mode
Paper
Fusing roller
Auxiliary heat roller
Inch
(U.S.A., 
Canada) 
AB_B
(Europe, 
U.K.)
AB_A 
(Australia) 
Inch
(U.S.A., 
Canada) 
AB_B
(Europe, 
U.K.)
AB_A 
(Australia) 
Ready 
condition 
print 
mode
Normal paper
200°C
205°C
200°C
205°C
Heavy paper
200°C
205°C
200°C
205°C
Tab paper
200°C
205°C
200°C
205°C
Postcard
200°C
205°C
200°C
205°C
Pre-heat
170°C
170°C
170°C
170°C
2.Fusing roller (Pressing): Mechanical cleaning by the cleaning 
scraper (the cleaning plate for the AR-M700N/U)
No.
Name
1
Cleaning sheet
2
Fusing roller (Pressing)
3
Cleaning scraper (AR-M550N/U, AR-M620N/U)
4
Discharge brush
5
Fusing roller (Heating)
6
Sub-heat roller
7
Cleaning plate (AR-M700N/U)
8
Oil roller (AR-M700N/U)
1
1
1
[AR-M550N/U, AR-M620N/U]
[AR-M700N/U]
5
2
4
8
1
6
7
5
2
4
3
1
6
1
1
1
: Feb. 6 2004
1
AR-M550/M620/M700  DETAILS OF EACH SECTION  6 - 104
D. Maintenance and parts replacement
(1) Maintenance list (AR-M550N/U, AR-M620N/U)
: Check (Clean, replace, or adjust as necessary.)
: Clean
: Replace
: Adjust
: Lubricate
: Shift position
AR-M550U/N (PM: 250K)
When 
calling 
250K 500K 750K 1000K 1250K 1500K 1750K 2000K
Remark
AR-M620U/N (PM: 300k)
300K 600K 900K 1200K 1500K 1800K 2100K 2400K
Unit name   No.
Part name
Fusing 
section
1
Heat roller
2
Pressure roller
3
Sub heat roller
4
Cleaning sheet
5
Fusing cleaning scraper
6
Heat roller separation pawl
7
Pressure roller separation pawl
8
Thermistor
Paper dust removal 
is required.
9
Heat roller gear (Grease)
UKOG-0235FCZZ
10 Sub heat roller bearing
11 Paper guides
12 Shaft (Grease)
UKOG-0235FCZZ
1
8
3
11
6
7
7
6
2
1
8
8
10
12
12
9
12
12
10
5
4
Page of 12
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Sharp AR-M700 (serv.man21) Service Manual ▷ Download

  • DOWNLOAD Sharp AR-M700 (serv.man21) Service Manual ↓ Size: 2.86 MB | Pages: 12 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp AR-M700 (serv.man21) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp AR-M700 (serv.man21) Copying Equipment. Information contained in Sharp AR-M700 (serv.man21) 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.