Read Sharp AR-C150 (serv.man5) Service Manual online
Item
NO.
Correction items
Factors
Purpose and effect
Change item
NOTE
6
Toner
concentration
control correction
concentration
control correction
Toner
concentration
sensor
correction
concentration
sensor
correction
Developing capability
change and toner
concentration sensor
detection error due to
developer/toner
characteristics
(chargeability) change
(temperature/humidity
change, developer
aging change)
change and toner
concentration sensor
detection error due to
developer/toner
characteristics
(chargeability) change
(temperature/humidity
change, developer
aging change)
For change in developing
capability and the toner
concentration sensor error due
to change in developer and
toner characteristics
(chargeability)(temperature/
humidity change, developer
aging), the toner concentration
is maintained in the proper
level, the proper density print is
maintained, background copy is
prevented, and toner dispersion
is prevented.
capability and the toner
concentration sensor error due
to change in developer and
toner characteristics
(chargeability)(temperature/
humidity change, developer
aging), the toner concentration
is maintained in the proper
level, the proper density print is
maintained, background copy is
prevented, and toner dispersion
is prevented.
Toner
concentration
control data
concentration
control data
Reset by SIM 25-2.
7
Image reading
correction
correction
Dark component
correction
correction
The CCD output
components include
non-image components.
components include
non-image components.
Non-image component is
subtracted from the CCD output
to provide the effective image
component only.
subtracted from the CCD output
to provide the effective image
component only.
Only effective
image
component is
taken out from
the CCD output.
image
component is
taken out from
the CCD output.
White balance
correction
correction
CCD sensitivity
fluctuation/Optical
system light quantity
fluctuation
fluctuation/Optical
system light quantity
fluctuation
CCD output fluctuation due to
CCD sensitivity fluctuation and
optical system light quantity
fluctuation is corrected.
CCD sensitivity fluctuation and
optical system light quantity
fluctuation is corrected.
The gain of the
amp for CCD
(image signals)
is adjusted.
amp for CCD
(image signals)
is adjusted.
Shading
correction
correction
CCD pixel
fluctuations/Optical
system light quantity
unevenness
fluctuations/Optical
system light quantity
unevenness
"Uneven density in reading
images due to CCD pixel
fluctuation, optical system light
quantity unevenness is
corrected. "
images due to CCD pixel
fluctuation, optical system light
quantity unevenness is
corrected. "
The output gain
of each pixel of
CCD is adjusted.
of each pixel of
CCD is adjusted.
8
CCD gamma
correction
correction
"Gamma fluctuation in
R, G, B"
R, G, B"
Gamma fluctuation of R/G/B is
corrected to make proper
balance of gray (color) when
reading images.
corrected to make proper
balance of gray (color) when
reading images.
Gamma of each
of R/G/B.
of R/G/B.
9
Half tone image
correction
correction
Laser beam duty
correction 1
correction 1
OPC drum/developing
section
(developer/toner)
characteristics change
(Temperature/humidity
change,
developer/toner
deterioration)
section
(developer/toner)
characteristics change
(Temperature/humidity
change,
developer/toner
deterioration)
"For the image forming section
characteristics change, the
color balance (gamma) set with
SIM 46-24(21) is maintained.
(The half tone density is
maintained.)"
characteristics change, the
color balance (gamma) set with
SIM 46-24(21) is maintained.
(The half tone density is
maintained.)"
Laser beam
power (Laser
beam ON duty)
power (Laser
beam ON duty)
10
Color balance
adjustment
adjustment
Laser beam duty
correction 2
correction 2
Color balance
fluctuations between
machines
fluctuations between
machines
Set the color balance fluctuation
between the machines to the
standard color balance
(gamma).
between the machines to the
standard color balance
(gamma).
Laser beam
power (Laser
beam ON duty)
power (Laser
beam ON duty)
11
Link between
color balance
adjustment data
and half tone
image correction
data
color balance
adjustment data
and half tone
image correction
data
Link between color balance
adjustment data and half tone
image correction data
adjustment data and half tone
image correction data
12
User auto color
balance
adjustment (Auto
gamma setup)
balance
adjustment (Auto
gamma setup)
Color balance adjustment is
performed by the user.
performed by the user.
Laser beam
power (Laser
beam ON duty)
power (Laser
beam ON duty)
13
Resist roller
RPM correction
RPM correction
Paper conditions
change (Transport
capability change)
change (Transport
capability change)
When the paper transport
capability is changed due to
humidity, the relative transport
speed of the transfer belt and
the resist roller is changed to
assure proper paper transport
capability in the transfer section.
capability is changed due to
humidity, the relative transport
speed of the transfer belt and
the resist roller is changed to
assure proper paper transport
capability in the transfer section.
Resist roller RPM
AR-C150
3 – 2
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