Read Sharp AR-C270 (serv.man6) Service Manual online
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
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