DOWNLOAD Sharp AR-C170 (serv.man24) Service Manual ↓ Size: 12.66 MB | Pages: 56 in PDF or view online for FREE

Model
AR-C170 (serv.man24)
Pages
56
Size
12.66 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Descriptions of each section
File
ar-c170-sm24.pdf
Date

Sharp AR-C170 (serv.man24) Service Manual ▷ View online

AR-C170M  DESCRIPTIONS OF EACH SECTION  7 - 1
[7] DESCRIPTIONS OF EACH SECTION
1. Fusing section
A. Operational descriptions
(1) Outline
This section performs the following function and operation.
1) Toner attached to paper in the transport section is fused onto
paper by heat and pressure of the heat roller.
(2) Electrical and mechanical sections
GND2
GND2
THSU
THSD
POD1
+5V
FULHin
+24VL
PCU
FUSM
Driver PWB
Fusing drive connection gear
Drawer connector (13+4pin)
DC power PWB
HL drive circuit
L2
HL1N
2
B2
B3
B4
B6
B1
B3
B4
B5
A2
A6
A2
A6
A4
A4
A7
A1
L2
CN3-3
N2
CN3-1
1
3
2
1
3
HL2N
+24V
+24V
+5V
GND2
THSU
THSD
POD1
FUCHin
GND2
+24V
+24V
+24V
FUSM_A
FUSM_B
FUSM_A\
FUSM_B\
+24V
HLPR
HL1
HL1N
HL2N
L2
HL2
MSW
ON
DC-CNT
FUSM_A\
FUSM_B\
FUSM_A
DSWL
DSWL
FUSM_B
+24V
+24V
FUSM_A\
FUSM_B\
FUSM_A
DSWL
FUSM_B
DSWLin
DSWLout
CN3
CN1(6pin)
CN8(20pin)
CN14(10pin)
CN2(34pin)
CN12(34pin)
CN7
CN2
7
6
5
4
3
1
6
5
4
3
2
1
1
1
1
8
9
10
10
8
19 20
12
14
7
6
6
2
2
8
6
4
3
3
9
11
16
7
5
3
1
9
11
16
7
5
3
2
1
POD1
THSU
THSD
THSD
HLTS1
HL1
HL2
HLTS2
HLTS2
3
5
4
3
2
1
2
1
2
1
1
Fusing unit
AR-C170M  DESCRIPTIONS OF EACH SECTION  7 - 2
(3) Major parts/signals functions and operations
RW: Abbreviation of Related Wiring, which means the said load is specified in the related figure of the mechanical and the electrical sec-
tions.
(4) Operational descriptions
a. Fusing unit drive
To drive the fusing unit, drive power is transmitted from the drive
motor (FUSM) through the connection gear to the upper heat roller
gear.
The drive motor (stepping motor) is driven by the motor drive IC in
the driver PWB according to the control signal sent from the PCU.
b. Heater lamp drive
The surface temperature detected by the thermistor is sent to the
PCU. When the temperature is lower than the specified level, the
PCU sends the heater lamp lighting signal to the heater lamp drive
circuit in the DC power PWB.
The triac in the heater lamp drive circuit is turned on to apply AC
power to the heater lamp, which turns on to heat the heat rollers.
The thermostats are provided as a safety measure to prevent
against an abnormally high temperature of the heat rollers.
When the thermostat is opened, the power supply (AC neutral) to
the heater lamp is cut off.
c. Fusing operation
Color toner of YMCK on paper is heated and pressed by the heat
rollers to be fused on paper.
At that time, color toner of YMCK is mixed to reproduce nearly
actual colors of document images.
The upper and the lower heat rollers are provided to heat from
above and below. This is because it is necessary to heat four lay-
ers of toner from above and below and right and left to fuse it on
paper.
The upper and lower heat rollers are of silicon rubber. This is
because of the following reasons:
1) To provide a greater nip quantity and a higher heating capacity
for paper.
2) The soft, flexible rollers press multi-layer toner without defor-
mation to fuse on paper.
3) An even pressure is applied to an uneven surface of multi-
layer toner.
6
1
6
2
4
1
5
3
4
1
2
2
6
3
6
6
1
2
4
5
4
5
1
1
3
120V 950W
120V 350W
No.
Name
Code, Signal name
Function
1
Heat roller
Heats and presses toner to fuse it on paper. Silicon rubber rollers 
are used as the upper and the lower heat rollers. Teflon tube is 
wound around the upper heat roller.
2
Upper/lower separation pawls
Mechanically separate paper from the heat roller, which was not 
separated naturally.
3
Heater lamp
Upper: HL1, Lower: HL2
Heats the heat rollers.
4
Thermistor
Upper: THSU, Lower: THSD
Detects the surface temperature of the heat roller. (Keeps the 
roller surface temperature at a constant level.)
5
Thermostat
Upper: HLTS1, Lower: HLTS2
Cuts conduction of the heater lamp when an abnormally high 
temperature is detected.
6
Paper exit sensor
POD1
Detects paper discharged from the fusing section.
RW
Control signal
FUSM_A, A’, B, B’
Drives the fusing section.
RW
Control signal
FUCHin
Fusing unit installation detecting signal
RW
Control signal
DSWL
Left cabinet open/close detection signal
RW
Control signal
HLPR
Heater lamp power relay (in the DC power PWB) drive signal
FUSM
PCU
Driver
PWB
AR-C170M  DESCRIPTIONS OF EACH SECTION  7 - 3
d. Fusing temperature control
The temperature sensor is provided at the center of the upper and
the lower heat rollers.
The temperature sensor at the center detects the heat roller tem-
perature and controls the heater lamp to keep the fusing tempera-
ture at the specified level.
The fusing temperature is switched according to the machine con-
dition and paper type selected.
(Example: 200V series)
B. Disassembly/Assembly/Maintenance
(1) Fusing section maintenance target parts
: Check (Clean, replace, or adjust as necessary.)
 
: Clean
 
: Replace
 
: Adjust
 
: Lubricate
 
: Shift position
Upper heat roller
Lower heat roller
Ready state
160°C
145°C
Power save mode
138°C
OFF
Print mode
Normal paper 
B/W
160°C
145°C
OHP sheet
170°C
155°C
Heavy paper 1
170°C
135°C
Heavy paper 2
175°C
145°C
Envelope
180°C
145°C
Unit name
No.
Part name
When 
calling
50K
100K
150K
200K
250K
300K
350K
400K
Remark
Fusing section
1
Upper heat roller
Replace at 100K or 
within 2 years.
2
Lower heat roller
Replace at 100K or 
within 2 years.
3
Heat roller gear
100K
4
Heat roller bearing
100K
5
Separation pawl
100K
6
Thermistor
100K
Bearings
7
Gears
8
Paper guides
9
Paper exit roller
Fusing unit
Replace the unit at 
100K or within 2 years.
6
6
1
2
4
4
4
4
5
8
9
3
6
6
1
2
5
4
4
4
4
5
9
7
8
3
AR-C170M  DESCRIPTIONS OF EACH SECTION  7 - 4
(2) Maintenance parts replacement procedure
a. Fusing unit removal
1) Open the left cabinet.
2) Loosen the roller knob (A) and remove the fusing unit (B).
b. Upper thermistor
1) Remove the fusing until from the machine.
2) Remove the screw and the harness cover (A).
3) Remove the connector, the screw, and the harness, and
remove the thermistor (B).
c. Lower thermistor
1) Remove the fusing unit from the machine.
2) Remove the screws, and remove the fusing front PG (A).
3) Remove the connector, the screw, and the harness, and
remove the thermistor (B).
d. Upper heater lamp
1) Remove the fusing unit from the machine.
2) Remove the screw and remove the fusing front cover (A).
Remove the harness cover (B).
3) Remove the connector, the screw, and the lamp holder (C),
and remove the upper heater lamp (D).
e. Lower heater lamp
1) Remove the fusing unit from the machine.
2) Remove the screw, and remove the fusing front cover (A).
3) Remove the screw, and remove the fusing front PG (B). 
4) Remove the connector, the screw, and the lamp holder (C),
and remove the lower heater lamp (D).
A
B
A
B
A
B
A
B
C
D
A
B
C
D
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  • DOWNLOAD Sharp AR-C170 (serv.man24) Service Manual ↓ Size: 12.66 MB | Pages: 56 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp AR-C170 (serv.man24) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp AR-C170 (serv.man24) Copying Equipment. Information contained in Sharp AR-C170 (serv.man24) 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.