Sharp AR-C250 (serv.man4) Service Manual ▷ View online
f. Transfer section
No.
Parts
Model
Note
Code
Signal
name
Name
Type
Function/Operation
Active
condition
1
Transfer unit
Transfers toner from the OPC
drum to paper.
drum to paper.
2
Transfer belt
separation pawl
separation pawl
Separates paper from the
transfer belt mechanically.
transfer belt mechanically.
Japan only
3
BPSS
BPSS
Separation pawl
solenoid
solenoid
Drives the separation
solenoid.
solenoid.
Japan only
4
Transfer belt
drive roller
drive roller
Drives the transfer belt.
5
Transfer
discharge
electrode
discharge
electrode
Discharges electric charges
of the transfer belt.
of the transfer belt.
4 pcs (Y, M, C,
K)
K)
6
Transfer roller
Applies a transfer voltage to
the transfer belt.
the transfer belt.
4 pcs (Y, M, C,
K)
K)
7
Lift cam
Transmits the transfer belt lift
motor power to the transfer
unit.
motor power to the transfer
unit.
Lifted up in
color print
mode, and lifted
down in
monochrome
mode.
color print
mode, and lifted
down in
monochrome
mode.
8
PCS
PCS
Image density
sensor
sensor
Photo sensor
(Photo reflection)
(Photo reflection)
Detects toner patch density in
image density correction.
image density correction.
Analog input
9
BLUM
BLUM
Transfer belt
motor
motor
Stepping motor
Lifts the transfer belt unit.
1
2
3
4
5
6
7
8
9
10
11
12
15
16
18
19
20
21
22
13
14
16
10
8
12
15
5
6
4
3
2
7
5
5
5
6
6
6
23
24
25
26
27
14
13
28
28
5 – 6A
No.
Parts
Model
Note
Code
Signal
name
Name
Type
Function/Operation
Active
condition
10
CALS
CALS
Sensor switch
solenoid
solenoid
Selects the image density
sensor.
sensor.
Switches the
sensor angle
depending on
detection of
color toner
patch density or
black toner
patch density.
sensor angle
depending on
detection of
color toner
patch density or
black toner
patch density.
11
TC high voltage
power PWB
power PWB
Generates the high voltage
for transfer.
for transfer.
12
Transfer belt
Transfers toner images on
the OPC drum onto paper.
the OPC drum onto paper.
13
Waste toner tank
Collects toner of toner patch
used in image density
correction.
used in image density
correction.
14
Transfer belt
cleaning blade
cleaning blade
Cleans toner of toner patch
used in image density
correction.
used in image density
correction.
15
Transfer belt idle
roller
roller
Applies a tension to the
transfer belt.
transfer belt.
16
Transfer belt
cleaning pad
cleaning pad
Cleans the back of the
transfer belt.
transfer belt.
17
BLUD
BLUD
Transfer belt
position sensor
position sensor
Photo sensor
(Photo
transmission)
(Photo
transmission)
Detects that the transfer belt
is lifted up or down.
is lifted up or down.
L when lifting
up H when
lifting down
up H when
lifting down
18
BTM
BTM
Transfer belt
drive motor
drive motor
Stepping motor
Drives the transfer belt.
19
PSM
PSM
Resist roller
drive motor
drive motor
Stepping motor
Drives the resist roller and
controls ON/OFF.
controls ON/OFF.
20
HUD
HUD
Temperature
sensor
sensor
Detects humidity in the
machine.
machine.
Analog input
Each correction
of image
process section
is made
according to
this sensor data.
of image
process section
is made
according to
this sensor data.
21
PCU sub PWB
Controls the image process
section.
section.
22
Oil pump
Supplies fusing oil to the
fusing roller.
fusing roller.
23
PPD1
PPD1
Paper detector in
front of resist
roller
front of resist
roller
Photo sensor
(Photo
transmission)
(Photo
transmission)
Detects paper in front of the
resist roller.
resist roller.
L with paper
presence
presence
This detector
signal serves as
the paper
transport timing
control signal to
the transfer
section.
signal serves as
the paper
transport timing
control signal to
the transfer
section.
24
Upper resist roller
Transports paper to the
transfer section.
transfer section.
25
Lower resist roller
Transports paper to the
transfer section.
transfer section.
The operation
timing is
controlled by
the resist roller
motor.
timing is
controlled by
the resist roller
motor.
26
BELTCH1 BELTCH1 Transfer belt
installation
detection switch
(+24V)
detection switch
(+24V)
Micro switch
Turns ON/OFF the +24V
power line from the DC main
power PWB to the PCU PWB.
power line from the DC main
power PWB to the PCU PWB.
ON when the
transfer unit
operation is
allowed.
transfer unit
operation is
allowed.
27
BELTCH2 BELTCH2 Transfer belt
installation
detection switch
(+5V)
detection switch
(+5V)
Micro switch
Turns ON/OFF the +5V
power line from the DC main
power PWB to the PCU PWB.
power line from the DC main
power PWB to the PCU PWB.
ON when the
transfer unit
operation is
allowed.
transfer unit
operation is
allowed.
28
Resist roller
cleaner
cleaner
Cleaning the resist roller
AR-C160/
C270
C270
5 – 7A
(8) PWB
(AR-C150/C250)
(AR-C160/C270)
1
2
3
16
17
18
19
22
10
11
13
14
7
6
9
15
4
5
17
19
23
25
8
12
31
26
27
24
29
30
28
28
30
29
20
1
2
3
17
18
19
22
10
11
13
14
7
6
20
9
15
16
4
5
17
19
23
25
8
12
31
26
27
24
29
30
28
28
30
29
5 – 8A
No.
Parts
Note
Name
Function/Operation
1
Operation PWB L
Outputs the key operation signals.
2
OP control PWB
Controls the whole operation unit. (Displays information from the PCU PWB, and
sends operation information to the PCU PWB.)
sends operation information to the PCU PWB.)
3
Operation PWB R
Outputs the key operation signals.
4
LCD back light inverter PWB
Drives the LCD back light.
5
ICU-Main PWB
Controls the ICU SCN PWB, ICU IMG PWB, and CCD PWB. Converts digital
image data into video signals and sends them to the scanner (writing) unit.
image data into video signals and sends them to the scanner (writing) unit.
6
ICU-SCN PWB
Performs correction of images outputted from the CCD.
7
ICU-IMG PWB
Performs image processes such as area separation, color correction, black
generation, gamma correction, and filter process.
generation, gamma correction, and filter process.
8
CPT PWB
Recognizes the bank note patterns.
9
Original size sensor PWB
(Light reception)
(Light reception)
Detects the original size.
10
Original size sensor (Light
emitting)
emitting)
Outputs light to detect the original size.
11
CCD power PWB
Outputs the CCD PWB paper power.
12
Scanner motor PWB
Scanner motor control PWB.
Controls the
scanner motor.
scanner motor.
13
PCU sub PWB
Controls the image process section.
14
High voltage power PWB
(MC/DV)
(MC/DV)
Generates the high voltage for main charger and the developing bias voltage.
15
Main charger interface PWB
Interfaces the main charger power.
16
OPC drum motor control/Signal
interface PWB
interface PWB
Controls (drives) the OPC drum motor. (AR-C150/C250/C160/C270)
Signals are interfaced. (AR-C160/C270)
Signals are interfaced. (AR-C160/C270)
17
Scanner lamp control PWB
Controls the scanner lamp
18
Humidity sensor PWB
Detects humidity in the machine.
Each correction of
image process
section is made by
this sensor data.
image process
section is made by
this sensor data.
19
PCU MAIN PWB
Controls the engine section.
20
CCD ICU interface PWB
Relays the signal of CCD PWB and ICU-SCN PWB. (AR-C150/C250)
Generates the clock at the time of monochrome print operation and relays the
signal of CCD PWB and ICU-SCN PWB. (AR-C160/C270)
Generates the clock at the time of monochrome print operation and relays the
signal of CCD PWB and ICU-SCN PWB. (AR-C160/C270)
21
Paper tray lift unit control PWB
Controls the paper tray lift unit.
Provided in each
paper tray lift unit.
paper tray lift unit.
22
Discharge lamp PWB unit
Discharges electric charges on the OPC drum.
23
IFD PWB
Equipped with No. 1/2 paper tray paper exit detectors and the right upper door
open/close detector.
open/close detector.
24
PFD PWB unit
Equipped with No. 3/4 paper tray paper exit detectors and the right lower door
open/close detector.
open/close detector.
25
Process control PWB
Interfaces signals between the developing unit, OPC drum unit, the high voltage
PWB, and the PCU PWB.
PWB, and the PCU PWB.
26
Fusing control PWB (AC sub
PWB)
PWB)
Interfaces the heater lamp drive control, sensor, detector signals.
27
High voltage power PWB (TC)
Generates the transfer voltage.
28
DC main power PWB
(AR-C100/C150/C250)
DC power PWB
(AR-C160/C270)
(AR-C100/C150/C250)
DC power PWB
(AR-C160/C270)
Generates the voltage used by the other units than the operation unit.
29
DC sub power PWB
(AR-C150/C250)
Power control PWB
(AR-C160/C270)
(AR-C150/C250)
Power control PWB
(AR-C160/C270)
Generates the voltage for the operation unit (AR-C150/C250)
Controls powers of 24V, 5V and 3.3V in the sleep mode, the preheat mode, and
the normal mode. (AR-C160/C270)
Controls powers of 24V, 5V and 3.3V in the sleep mode, the preheat mode, and
the normal mode. (AR-C160/C270)
30
AC power PWB
Controls the primary side power (AC power).
31
CCD PWB
Converts original images (light) into electrical signals.
5 – 9A
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