Sharp AR-C172M (serv.man4) Service Manual ▷ View online
AR-C172M DESCRIPTIONS OF EACH SECTION 7 - 12
Cleaning: Clean the sensor surface.
d. PWB
1) Remove the transfer unit from the machine.
2) Remove the connector and the screw, and remove the belt
drive unit.
3) Remove the spring from the hook section.
4) Remove the process control shutter.
5) Remove the connector (A).
6) Remove the connector (B) and the screw, and remove the
PWB.
e. Waste toner tank unit
1) Remove the transfer unit from the machine.
2) Remove the connectors and the screws, and remove the belt
drive unit.
3) Remove the waste toner tank unit.
Note for assembly:
Insert the notches A and B of the waste toner tank unit into the
positions in the transfer frame indicated in the figure below.
positions in the transfer frame indicated in the figure below.
f. Transfer belt
1) Remove the transfer unit from the machine.
2) Remove the connector and the screw, and remove the belt
drive unit.
3) Remove the lower screw.
Note: If the upper screw is removed and folded, the electrode is
deformed. Therefore, be sure to remove the lower screw.
4) Fold the transfer belt housing and remove the transfer belt.
Note for installation:
When installing the transfer belt, be sure to place the lot number
section marked inside the transfer belt on the front side.
section marked inside the transfer belt on the front side.
A
B
B
A
Front
Rear
Lot number marking
AR-C172M 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-C172M 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-C172M 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
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