Sharp AR-C170 (serv.man24) Service Manual ▷ View online
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 13
g. Transfer roller
1) Remove the transfer unit from the machine.
2) Remove the connector and the screw, and remove the belt
drive unit.
3) Remove the transfer belt.
4) Disengage the pawl, and remove the bearing and the transfer
roller.
Note for assembly:
There are two different transfer roller bearings: black and white.
The black bearing is conductive, and must be attached to the elec-
trode side (rear frame side).
The black bearing is conductive, and must be attached to the elec-
trode side (rear frame side).
h. Transfer drive roller
1) Remove the transfer unit from the machine.
2) Remove the connector and the screw, and remove the belt
drive unit.
3) Remove the transfer belt.
4) Remove the E-ring and the bearing, and remove the transfer
drive roller.
i. Transfer follower roller
1) Remove the transfer unit from the machine.
2) Remove the connector and the screw, and remove the belt
drive unit.
3) Remove the transfer belt.
4) Remove the E-ring and the bearing, and remove the transfer
follower roller.
j. Transfer cleaning blade
1) Remove the transfer unit from the machine.
2) Remove the connector and the screw, and remove the belt
drive unit.
3) Remove the waste toner tank unit.
4) Remove the screw, and remove the transfer cleaning blade.
k. Transfer belt cleaning roller
1) Remove the transfer unit from the machine.
2) Remove the connector and the screw, and remove the belt
drive unit.
3) Remove the waste toner tank unit.
4) Press the cleaning lever in the arrow direction A, extend the
pawl in the arrow direction B, and pull up the cleaning lever in
the arrow direction C.
the arrow direction C.
5) Remove the transfer belt cleaning roller.
Front
Conductive
Rear
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 14
l. Belt cleaning brush
1) Remove the transfer unit from the machine.
2) Remove the connector and the screw, and remove the belt
drive unit.
3) Remove the transfer belt.
4) Remove the Belt cleaning brush.
m. Transfer discharge sheets.
1) Remove the transfer unit from the machine.
2) Remove the connector and the screw, and remove the belt
drive unit.
3) Remove the transfer belt.
4) Remove the terminals.
5) Remove the transfer discharge sheets.
n. Transfer lift-up unit
1) Remove the screw, and remove the left cabinet of the
machine.
2) Remove the connector.
3) Adjust the rail positions so that section A does not make con-
tact with the acuride section when the transfer lift-up unit is
lifted up.
lifted up.
4) Lift the transfer lift-up unit in the arrow direction B with section
A as the fulcrum, and remove it.
A
A
A
A
B
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 15
3. Process (image forming) section
A. Operational descriptions
(1) Outline
This section functions and operates as follows:
1) In this section, the LED is lighted according to the data sent
from the image process section to form electrostatic latent
images on the OPC drums which are charged evenly by the
main charger, and toner is attached to the electrostatic latent
images.
images on the OPC drums which are charged evenly by the
main charger, and toner is attached to the electrostatic latent
images.
(2) Electrical and mechanical sections
C
M
Y
K
CN2
CN3
CN6
CN5
CN1
CN4
CN9
CN7
GND2
MC(K)
MC(YMC)
GND2
GND2
+3.5V
+5V
+5V
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
D
A
T
A00
D
A
T
A10
D
A
T
A11
D
A
T
A12
D
V
ALID
D
A
T
A01
D
A
T
A02
D
A
T
A03
DCLK
D
A
T
A13
CN9(22pin) Y
CN6(22pin) K
CN4(22pin) M
CN5(22pin) C
CN7(6pin) Y
CN1(6pin) M
CN2(6pin) C
CN3(6pin) K
LPHRST
ST
A
TUS
LSYNC
PSYNC
+24V
FG
GND2
GND2
TES_
+5V
DV
R
T
N
D
VCLK
D
V
D
ATA
+5V
GND2
HV
-STB
HV
-D
A
T
A
HV
-CLK
HV
-REM
PCU
DM
DL LED
Y,M,C,K
MC
LED
LED unit
HV(MC)PWB
Driver PWB
Drum drive unit
Drum cartridge Y, M, C, K
Toner cartridge Y, M, C, K
Developing roller
Rear frame
Grid
Discharge lens
ICU
ICU
CN2(6pin) K
CN12(34pin)
CN17(28pin)
CN1(8pin)
CN19(16pin)
CN1(3pin) K
DMB/
DMB
DMA
DMA/
+24V
+24V
CN3(3pin) C
CN5(3pin) M
TES_
MC
M
C
DV CRUM
CN8(3pin) Y
CN10(12pin)
8
8
7
7
6
6
5
5
4
4
3
2
2
1
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22
7
6
5
4
3
2
1
1
6
5
4
3
2
1
4
3
2
1
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
6
5
4
3
2
1
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22
7
6
5
4
3
2
1
6
5
4
3
2
1
CN2(34pin)
MC K
GB
DVBias
MC YMC
CN3(12pin) C,M
CN4(6pin) Y
(6pin)
Y, M, C, K
Y, M, C, K
AR-C170M DESCRIPTIONS OF EACH SECTION 7 - 16
(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. Drum cartridge and toner cartridge drive
The drive power for the drum cartridges are transmitted from the
drive motor (DM) to the drum gears.
drive motor (DM) to the drum gears.
The toner cartridge is driven through the drum gear and the con-
nection gear.
nection gear.
The motor (stepping motor) for black is driven by the drive signal
sent directly from the PCU, and the motors color are driven by the
drive signals sent from the PCU through the driver PWB.
sent directly from the PCU, and the motors color are driven by the
drive signals sent from the PCU through the driver PWB.
b. LED (writing) unit
Four LED (writing) units are provided for each of Yellow, Magenta,
Cyan, and Black.
Cyan, and Black.
Each LED (writing) unit converts YMCK dot image data outputted
from the ICU PWB into LED light, and radiate the light onto the
OPC drum, forming electrostatic latent images on the OPC drum.
from the ICU PWB into LED light, and radiate the light onto the
OPC drum, forming electrostatic latent images on the OPC drum.
Since the position of each LED unit of CMYK is shifted in the
paper transport direction, the above operation depends on the rel-
ative position and differs in the operating timing.
paper transport direction, the above operation depends on the rel-
ative position and differs in the operating timing.
2
5
4
4
7
1
8
9
3
6
5
11
10
No.
Name
Code, Signal name
Function
1
OPC drum (YMCK)
—
Forms electrostatic latent images.
2
Main charger (YMCK)
MC
Charges the OPC drum surface negatively.
3
Discharge lens
—
Discharges the OPC drum surface.
4
Cleaning blade
—
Cleans the OPC drum surface to remove residual toner.
5
Toner reception seal
—
Seals to prevent against toner leakage.
6
Waste toner transport screw
—
Transports toner scraped by the cleaning blade to the waste toner box of the
toner cartridge.
toner cartridge.
7
MC cleaner
—
Cleans the MC (charging plate).
8
LED unit
—
Converts image signals into LED light and radiates it onto the OPC drum.
9
Developing roller
—
Attaches toner to the OPC drum. (Do not touch the developing roller.)
10
DV CRUM (Y, M, C, K)
—
Memory for toner cartridge data (counter, etc.)
11
Waste toner box
—
Collects waste toner transported from the drum cartridge.
RW
Grid biks
GB
Controls the drum surface potential.
RW
Discharge lamp
DL
Radiates lights onto the discharge lens.
RW
Drum motor A, A’, B, B’
DM A, A’, B, B’
Drives the OPC drum.
RW
Toner empty sensor
TES
Detects the toner quantity in the toner cartridge.
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