Sharp AR-C170 (serv.man24) Service Manual ▷ View online
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 5
f. Upper heat roller, bearing, gear
1) Remove the fusing unit from the machine.
2) Remove the lever (A), and release the roller pressure.
3) Remove the screw.
4) Open the upper fusing section.
5) Remove the heat roller upper unit (B).
∗
When assembling, put the flanges of the upper bearings outside
of the frames F and R.
of the frames F and R.
6) Remove the C-ring and the bearing, and remove the gear (A)
and the heat roller (B).
g. Lower heat roller, bearing
1) Remove the fusing unit from the machine.
2) Remove the screw, and open the upper fusing section.
3) Remove the lower heat roller unit (B).
4) Remove the C-ring and the bearing (A), and remove the heat
roller (B).
h. Paper guide
1) Remove the fusing unit from the machine.
2) Remove the screw, and remove the paper guide.
Note: Refer to the adjustment (ADJ13) when installing the paper
guide.
A
A
B
Frame R
Frame F
Frame R
Frame F
A
B
B
A
A
B
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 6
i. Paper exit roller
1) Remove the fusing unit from the machine.
2) Open the upper fusing section.
3) Remove the E-ring (A), and shift the bearing (B).
4) Remove the paper exit roller unit (C).
5) Remove the E-ring, the gear, the pin, and the bearing.
j. Lower separation pawl
1) Remove the fusing unit from the machine.
2) Open the upper fusing section.
3) Remove the paper exit roller unit.
4) Lift the separation pawl and shift it to the right and lift it from
the heat roller.
5) Remove the POD1 connector.
6) Remove the screw, and slide and remove the lower separation
pawl mounting plate.
7) Rotate the separation pawl in direction A and remove if from
the mounting plate. Remove the spring.
Note: When attaching the separation pawl, check that the separa-
tion pawl is in contact with the heat roller.
A
B
C
C
A
B
C
A
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 7
2. Transfer section
A. Operational descriptions
(1) Outline
This section functions and operates as follows:
1) A high, positive voltage is applied to the transfer roller to
charge the transfer belt and paper on it positively, attracting
negatively charged toner images on the OPC drum onto
paper.
negatively charged toner images on the OPC drum onto
paper.
(2) Electrical and mechanical sections
(20pin)
(14pin)
12
13
7
8
9
14
1
4
5
6
3
10
16
17
15
20
18
19
11
13
1
5
7
3
9
12
10
8
FG
1
2
5
6
3
4
BTM B/
BTM A/
+24V
+24V
BTM B
BTM A
1
2
5
6
3
4
BLUM B/
BLUM A/
+24V
+24V
BLUM B
+5V
BLUD
GND2
BLUM A
1
2
5
3
4
CN9
(24pin)
(24pin)
CN17
(28pin)
(28pin)
DSNRout
DSWR
CN6 (10pin)
14
2
6
4
21
12
13
10
22
24
8
5
11
9
7
1
3
3
5
7
9
8 10
2
4
6
PCU PWB
CALS/
+24V
PCSC
GND2
B SEN LED
REG SEN
+5V
NC
BTNF
CALS/
GND2
GND2
PCS_C
ASEN_LED
GND2
REGSEN
TS (CL)
BTM /B
BTM /A
BTM B
BTM A
+24V
GND (FLAME)
BSEN_LED
PCS_K
PCSK
A SEN LED
GND2
BTN F
GND2
1
2
8
7
4
3
6
5
2
1
1
5
4
2
8
7
6
4
5
6
7
8
9 10
1 2
3
30 34
+24V
(4pin)
CN1 (8pin)
CN2 (10pin)
HV (MC) PWB
PCSC
PCSK
CALS
BTM
BLUM
BLUD
BTNF
Drive gear
Lift-up cam
Process control
shutter
shutter
Drawer connector
(24pin)
(24pin)
1
2
5
6
3
4
7
8
9
10
HV (TC) PWB
THVY
THVM
THVC
THVK
CN1 (10pin)
+24V
HVREM
TCC
TCM
TCY
TCK
GND
FG
FG
(NC)
HV REM
+24V
(NC)
FG
TC K
TC Y
TC M
TC C
HV REM
GND
FG
HV CLK
HV DATA
HV STB
GND2
GND2
+24V
BTNF
NC
CALS/
BELT CHim
A SEN LED
PCSK
GND2
PCSC
B SEN LED
GND2
REG SEN
+5V
BTM B/
BTM A/
BTM B
BTM A
+24V
(5pin)
(2pin)
1
2
(6pin)
(5pin)
Transfer belt unit
Color PC &
Auto reg
sensor
Auto reg
sensor
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 8
(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.
No.
Name
Code, signal name
Function
1
Transfer belt
—
Transfers toner images on the OPC drum onto paper.
2
Transfer roller
—
Applies a transfer voltage to the transfer belt.
3
Belt cleaning blade
—
Cleans and removes toner from the transfer belt.
4
Transfer discharge sheet
—
Discharges the transfer belt.
5
Transfer belt cleaning roller
—
Removes paper dust from the transfer belt.
6
Transfer belt drive roller
—
Drives the transfer belt.
7
Transfer belt follower roller
—
Transfer drive follower roller
8
Transfer belt cleaning brush
—
Cleans the back surface of the transfer belt.
9
Process control sensor
Monochrome: PCSK
Color: PCSC
Color: PCSC
Detects the toner patch density in image density correction.
10
Transfer waste toner tank
—
Collects waste toner on the transfer belt.
11
Transfer belt unit
RW
Belt motor
BTM
Drives the transfer belt.
RW
Calibration solenoid
CALS
Drives the shutter on the process control sensor.
RW
Waste toner full detection switch
BTNF
Detects waste toner full in the waste toner box.
RW
Belt lift-up motor
BLUM
Lifts up the transfer belt unit.
RW
Belt lift-up sensor
BLUD
Detects the position of the transfer belt unit.
RW
Control signal
TC (K, C, M, Y)
Each color transfer high voltage control signal
RW
Control signal
THV (K, C, M, Y)
Each color transfer high voltage
5
3
3
9
9
1
10
1
5
3
3
9
9
1
10
1
10
5
5
6
7
8
8
2
3
3
9
9
1
1
10
11
2
4
2
4
2
4
4
7
8
4
2
4
4
2
2
6
8
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