Sharp AR-C270 (serv.man11) Service Manual ▷ View online
The print density should vary gradually from the lower density to the
higher density without reversion of changing direction.
higher density without reversion of changing direction.
The density level of each color should be almost the same.
It is acceptable for patch B not to be copied.
Patch A is not copied.
When, however, the color balance is adjusted according to the user’s
request, there is no need to adjust to the standard color balance as
stated above.
request, there is no need to adjust to the standard color balance as
stated above.
5) Select the color to be adjusted and select the adjustment point
with the scroll key.
6) Enter the adjustment value with the 10-key and press the OK key.
The adjustment value can be selected in the range of 245 – 755 (1
– 999). When SIM 46-24 is used to perform the automatic color
balance and the density adjustment, all the set values of this simu-
lation are set to 500.
To increase the density, increase the adjustment value. To de-
crease the density, decease the adjustment value.
– 999). When SIM 46-24 is used to perform the automatic color
balance and the density adjustment, all the set values of this simu-
lation are set to 500.
To increase the density, increase the adjustment value. To de-
crease the density, decease the adjustment value.
Repeat procedures 3) – 6) until the condition of procedure 4) is satis-
fied.
fied.
When the overall density is low or patch A is copied with a high den-
sity, use the arrow keys to change all the adjustment values of A - 0
simultaneously and uniformly.
sity, use the arrow keys to change all the adjustment values of A - 0
simultaneously and uniformly.
Then perform the patch density adjustment. This allows to make an
efficient adjustment.
efficient adjustment.
By using the black patch as the reference, adjust so that the color bal-
ance of the black patch of each process (CMY) in A - 0 becomes vir-
tually same as the black patch.
ance of the black patch of each process (CMY) in A - 0 becomes vir-
tually same as the black patch.
In this simulation mode, press CLEAR key to return to the normal
copy mode and make actual copies of the service chart and user
documents. Check the adjustment result.
copy mode and make actual copies of the service chart and user
documents. Check the adjustment result.
7) Execute SIM 44-21.
The initial setup of half tone image correction is performed.
This procedure is to store the copy color balance adjustment data as
the reference data for half-tone correction.
the reference data for half-tone correction.
This procedure should be always executed immediately after comple-
tion of ADJ M17/ADJ 3 (Color balance adjustment (Manual)) with SIM
46-21.
tion of ADJ M17/ADJ 3 (Color balance adjustment (Manual)) with SIM
46-21.
When ADJ M17/ADJ2 (Color balance adjustment (Auto)) is performed
with SIM 46-24, this procedure is automatically performed.
with SIM 46-24, this procedure is automatically performed.
When EXECUTE key is pressed, it is highlighted and the operation is
started.
started.
It takes several minutes to complete the operation. When the opera-
tion is completed, the screen returns to the original state. After com-
pletion of the operation, cancel the simulation.
tion is completed, the screen returns to the original state. After com-
pletion of the operation, cancel the simulation.
8) Execute the half tone image correction. (Forcible execution) (SIM
44-26)
When EXECUTE key is pressed, it is highlighted and the operation is
started. It takes several minutes to complete the operation. When the
operation is completed, the screen returns to the original state.
started. It takes several minutes to complete the operation. When the
operation is completed, the screen returns to the original state.
After completion of the operation, cancel the simulation.
9) Use the test chart UKOG-0283FCZZ and check the copy color bal-
ance and the density in the Text/Photo mode (AR-C150)
Text/Printed photo mode (AR-C250/C160/C270). (Refer to the
section of the copy color balance and the density check.)
Text/Printed photo mode (AR-C250/C160/C270). (Refer to the
section of the copy color balance and the density check.)
If the copy color balance and the density are not in the specified level,
repeat procedures 7) through 9) until they are in the specified level.
repeat procedures 7) through 9) until they are in the specified level.
However, repetition is limited to three times. If repetition of the above
procedures does not set the copy color balance and the density to the
specified level, there may be some other reason. Investigate the rea-
son and repair or fix the problem, then perform all the procedures of
print quality adjustment from the beginning.
procedures does not set the copy color balance and the density to the
specified level, there may be some other reason. Investigate the rea-
son and repair or fix the problem, then perform all the procedures of
print quality adjustment from the beginning.
10) When the color balance is customized, register the color balance
as the service target by SIM 63-7. (AR-C150/C250/C160/C270)
When the color balance is not customized, there is no need to
perform this work.
If the customized color balance is registered as the service
target, when the color balance is adjusted in the next time, the
automatic color balance adjustment mode can be used. In the
next color balance adjustment, select the service target color
balance in the automatic color balance adjustment mode, and
the color balance will be adjusted to the same color balance as
registered this time.
When the color balance is not customized, there is no need to
perform this work.
If the customized color balance is registered as the service
target, when the color balance is adjusted in the next time, the
automatic color balance adjustment mode can be used. In the
next color balance adjustment, select the service target color
balance in the automatic color balance adjustment mode, and
the color balance will be adjusted to the same color balance as
registered this time.
7 – 32
Troubleshooting on copy color balance and density
If the copy quality adjustment cannot provide a normal copy quality, check the following items.
Check that the following simulation values are in the specified range. If any value is improper, check the machine conditions and replace consumable
parts or take necessary measures.
parts or take necessary measures.
(AR-C150)
SIM No
ITEM
SPEC
NOTE
GR
BS
DV
BS
Standard value
Fixed
Standard value
Fixed
44-9
BLACK
333 to 875 (PCU Ver6.01
Sub PCU Ver5.04 or
before) / 333 to 900 (PCU
Ver6.02a Sub PCU
Ver5.05 or later)
525
(AR-C100/C150)
545 (AR-C250/C160/
C270)
150 – 700
325
A greater difference between
GR-BS(XXX) and DV-BS(XXX) means
a greater correction quantity of the DV
bias voltage and of the main charger
grid voltage. It may be judged that the
image process section conditions are
degraded. (The deterioration degree of
developer, the OPC drum, the transfer
belt, the transfer roller, and the main
charger, etc. may be presumed.)
GR-BS(XXX) and DV-BS(XXX) means
a greater correction quantity of the DV
bias voltage and of the main charger
grid voltage. It may be judged that the
image process section conditions are
degraded. (The deterioration degree of
developer, the OPC drum, the transfer
belt, the transfer roller, and the main
charger, etc. may be presumed.)
(NORMAL
MODE)
(2/6)
MODE)
(2/6)
CYAN
305 to 850 (PCU Ver6.01
Sub PCU Ver5.04 or
before) / 305 to 900 (PCU
Ver6.02a Sub PCU
Ver5.05 or later)
525 (AR-C100/C150)
545 (AR-C250)
555 (AR-C160/C270)
125 to 700
MAGENTA
YELLOW
(AR-C250)
SIM No
ITEM
SPEC
NOTE
GR
BS
DV
BS
Standard value
Fixed
Standard value
Fixed
44-9
BLACK
333 to 875 (PCU Ver4.0D
Sub PCU Ver3.0D or
before) / 333 to 900 (PCU
Ver4.01 Sub PCU
Ver3.01 or later)
525 (AR-C100/C150)
545 (AR-C250/C160/
545 (AR-C250/C160/
C270)
150 – 700
325
A greater difference between
GR-BS(XXX) and DV-BS(XXX) means
a greater correction quantity of the DV
bias voltage and of the main charger
grid voltage. It may be judged that the
image process section conditions are
degraded. (The deterioration degree of
developer, the OPC drum, the transfer
belt, the transfer roller, and the main
charger, etc. may be presumed.)
GR-BS(XXX) and DV-BS(XXX) means
a greater correction quantity of the DV
bias voltage and of the main charger
grid voltage. It may be judged that the
image process section conditions are
degraded. (The deterioration degree of
developer, the OPC drum, the transfer
belt, the transfer roller, and the main
charger, etc. may be presumed.)
(NORMAL
MODE)
(2/6)
MODE)
(2/6)
CYAN
305 to 850 (PCU Ver4.0D
Sub PCU Ver3.0D or
before) / 305 to 900 (PCU
Ver4.01 Sub PCU
Ver3.01 or later)
525 (AR-C100/C150)
545 (AR-C250)
555 (AR-C160/C270)
125 to 700
MAGENTA
YELLOW
(AR-C160/C270)
SIM No
ITEM
SPEC
NOTE
GR
BS
DV
BS
Standard value
Fixed
Standard value
Fixed
44-9
BLACK
333 to 900
525 (AR-C100/C150)
545 (AR-C250/C160/
545 (AR-C250/C160/
C270)
150 – 700
325
A greater difference between
GR-BS(XXX) and DV-BS(XXX) means
a greater correction quantity of the DV
bias voltage and of the main charger
grid voltage. It may be judged that the
image process section conditions are
degraded. (The deterioration degree of
developer, the OPC drum, the transfer
belt, the transfer roller, and the main
charger, etc. may be presumed.)
GR-BS(XXX) and DV-BS(XXX) means
a greater correction quantity of the DV
bias voltage and of the main charger
grid voltage. It may be judged that the
image process section conditions are
degraded. (The deterioration degree of
developer, the OPC drum, the transfer
belt, the transfer roller, and the main
charger, etc. may be presumed.)
(NORMAL
MODE)
(2/6)
MODE)
(2/6)
CYAN
305 to 900
525 (AR-C100/C150)
545 (AR-C250)
555 (AR-C160/C270)
125 to 700
MAGENTA
YELLOW
7 – 33
Perform the following procedures.
JOB No
WORK ITEM
SIM No
Trouble caused by improper
adjustment
NOTE
ADJ M4 High
voltage
adjustment
adjustment
ADJ 1 Main
charger
grid
voltage
adjustment
grid
voltage
adjustment
8-2
Improper image density (especially
in the high density section), improper
copy, image density section copy
abnormality, chip on the edge of
half-tone images
in the high density section), improper
copy, image density section copy
abnormality, chip on the edge of
half-tone images
If the digital
multi-meter
and the
high
voltage
probe
specified
on the
Service
Manual are
not
available,
set the
adjustment
value to the
default.
multi-meter
and the
high
voltage
probe
specified
on the
Service
Manual are
not
available,
set the
adjustment
value to the
default.
Check and adjust when the high
voltage PWB (Main charger / DV
bias) is replaced. / Adjust when the
output is not in the specified level. /
Check and adjust when the
copy/print quality (density, color
balance) adjustment does not
provide a satisfactory result.
voltage PWB (Main charger / DV
bias) is replaced. / Adjust when the
output is not in the specified level. /
Check and adjust when the
copy/print quality (density, color
balance) adjustment does not
provide a satisfactory result.
ADJ 2 DV bias
voltage
adjustment
adjustment
8-1
Improper image density, improper
copy, image density section copy
abnormality, chip on the edge of
half-tone images
copy, image density section copy
abnormality, chip on the edge of
half-tone images
Check and adjust when the high
voltage PWB (Main charger / DV
bias) is replaced. / Adjust when the
output is not in the specified level. /
Check and adjust when the
copy/print quality (density, color
balance) adjustment does not
provide a satisfactory result.
voltage PWB (Main charger / DV
bias) is replaced. / Adjust when the
output is not in the specified level. /
Check and adjust when the
copy/print quality (density, color
balance) adjustment does not
provide a satisfactory result.
ADJ 3 Transfer
voltage
adjustment
adjustment
44-30
Improper image density, half-tone
image section improper copy, high
density image section density
unevenness and improper copy, low
density inside image outline
image section improper copy, high
density image section density
unevenness and improper copy, low
density inside image outline
Check and adjust when the high
voltage PWB (Transfer) is replaced.
/ Adjust when the output is not in the
specified level. / Check and adjust
when the copy/print quality (density,
color balance) adjustment does not
provide a satisfactory result.
voltage PWB (Transfer) is replaced.
/ Adjust when the output is not in the
specified level. / Check and adjust
when the copy/print quality (density,
color balance) adjustment does not
provide a satisfactory result.
ADJ M6 Image
density
sensor
adjustment
sensor
adjustment
ADJ 1 Image
density
sensor
calibration
sensor
calibration
44-13
Because of improper operation of
the process correction (high density
section image density correction),
parameters of the voltage, the
current, and the laser power of the
process section become improper to
cause improper image density,
improper copy, abnormal copy, chip
on the edge of half-tone image, tone
gap, improper color balance, etc. /
Error F2-44 – 45, 80 – 90
the process correction (high density
section image density correction),
parameters of the voltage, the
current, and the laser power of the
process section become improper to
cause improper image density,
improper copy, abnormal copy, chip
on the edge of half-tone image, tone
gap, improper color balance, etc. /
Error F2-44 – 45, 80 – 90
Adjust when the copy/print quality
(density, color balance) adjustment
does not provide a satisfactory result
or when an error F2-44 – 45, 80 – 90
occurs.
(density, color balance) adjustment
does not provide a satisfactory result
or when an error F2-44 – 45, 80 – 90
occurs.
ADJ 2 Image
density
sensor
position
adjustment
sensor
position
adjustment
44-23
Check that the following simulation values are in the specified range. If not, troubleshoot the cause and repair.
SIM No
ITEM
Display value at 25°C, 70%
(Reference value)
Phenomenon when the sensor operation is abnormal
NOTE
44-14
TEMPERATURE
100 to 120
The process section
correction for change in
temperature/humidity is not
performed. (Toner density,
transfer voltage, resist roller
RPM corrections)
correction for change in
temperature/humidity is not
performed. (Toner density,
transfer voltage, resist roller
RPM corrections)
(Improper color balance,
abnormal copy, improper copy,
toner dispersion, improper
image density, image deflection,
image dirt, decreased density
inside image outline)
abnormal copy, improper copy,
toner dispersion, improper
image density, image deflection,
image dirt, decreased density
inside image outline)
Check the relationship
between the actual
environment and the
sensor output level, and
check that the sensor is
operating properly.
between the actual
environment and the
sensor output level, and
check that the sensor is
operating properly.
HUMIDITY
35 to 45
Check that the following simulation values are normal. If not, troubleshoot the cause and repair.
SIM No
ITEM
LAST(BUP)
LEVEL
Phenomenon caused by
improper set value
NOTE
44-16
BLACK
Improper image density,
improper copy, improper color
balance, toner dispersion,
developer dispersion
improper copy, improper color
balance, toner dispersion,
developer dispersion
If the difference between LAST
(BUP) and LEVEL is extremely
great, the toner density control
may not function properly.
(BUP) and LEVEL is extremely
great, the toner density control
may not function properly.
(TONER
DENSITY)
(1/3)
DENSITY)
(1/3)
CYAN
MAGENTA
YELLOW
SIM No
ITEM
LV-ORG
DV
HUD
LV
Phenomenon caused by improper
set value
NOTE
44-16
BLACK
Toner density
correction is
nor performed
properly.
correction is
nor performed
properly.
Improper image
density, improper
copy, improper
color balance, toner
dispersion,
developer dispersion
density, improper
copy, improper
color balance, toner
dispersion,
developer dispersion
The toner density
correction levels for the
use frequency of
developer and the humidity
are displayed. Check that
those levels are proper.
correction levels for the
use frequency of
developer and the humidity
are displayed. Check that
those levels are proper.
(ATC
SENSITIVITY
REVISE)
(3/3)
SENSITIVITY
REVISE)
(3/3)
CYAN
MAGENTA
YELLOW
7 – 34
Check that the following simulation values are in the specified range. If not, troubleshoot the cause and readjust.
SIM
No
ITEM
SPEC
Phenomenon caused when the adjustment value is not in the normal
value range.
NOTE
Default
Standard value
44-2 DMGNDY
—
185
±
10 / 0 to 255
Improper adjustment of OPC drum phase
Image color shift,
banding, F2-50 – 57
banding, F2-50 – 57
Check the
sections related to
the OPC drum
and the OPC
drum mark sensor.
sections related to
the OPC drum
and the OPC
drum mark sensor.
DMGNDM
—
DMGNDC
—
DMGNDK
—
MKY/GND
—
30 to 70
MKM/GND
—
MKC/GND
—
MKK/GND
—
PCLEDC
—
0 to 255
Because of improper image sensor sensitivity
adjustment, the process correction (high density
section image density correction) is not
performed properly, resulting in improper
parameters of the voltage, the current, and the
laser power of the process section. / Because of
improper half-tone process correction, the laser
ON duty becomes improper.
adjustment, the process correction (high density
section image density correction) is not
performed properly, resulting in improper
parameters of the voltage, the current, and the
laser power of the process section. / Because of
improper half-tone process correction, the laser
ON duty becomes improper.
Improper image
density, improper
copy, abnormal copy,
chip on the edge of
half-tone image, tone
gap, improper color
balance / Errors
F2-44 – 45, 80 – 90
density, improper
copy, abnormal copy,
chip on the edge of
half-tone image, tone
gap, improper color
balance / Errors
F2-44 – 45, 80 – 90
Check the
sections related to
the transfer belt
and the image
density sensor.
sections related to
the transfer belt
and the image
density sensor.
PCLEDK
—
P_BK_B
—
SIM44-4
(PCS_B_TARGET_ID)
±
2 / 0 to 255
P_CY
—
SIM44-13 (P_CYI)
±
2 / 0 to 255
Check the following simulation values are in the specified range. If not, set the values to the specified range.
SIM
No
ITEM
SPEC
Phenomenon cause when the set value is changed
Phenomenon caused when the
set value is not in the normal
value range
NOTE
Default
Standard
value
44-4 PCS_C_TARGET_ID
102
—
Change in the color image sensor sensitivity (When
the set value is increased, the image density is
decreased. When the set value is decreased, the
image density is increased.)
the set value is increased, the image density is
decreased. When the set value is decreased, the
image density is increased.)
Because of improper image
sensor sensitivity adjustment, the
process correction (high density
section image density correction)
is not performed properly,
resulting in improper parameters
of the voltage, the current, and
the laser power of the process
section. / Because of improper
half-tone process correction, the
laser ON duty becomes improper.
Improper image density, improper
copy, abnormal copy, chip on the
edge of half-tone image, tone
gap, improper color balance /
Errors F2-44 – 45, 80 – 90
sensor sensitivity adjustment, the
process correction (high density
section image density correction)
is not performed properly,
resulting in improper parameters
of the voltage, the current, and
the laser power of the process
section. / Because of improper
half-tone process correction, the
laser ON duty becomes improper.
Improper image density, improper
copy, abnormal copy, chip on the
edge of half-tone image, tone
gap, improper color balance /
Errors F2-44 – 45, 80 – 90
PCS_B_TARGET_ID
133
—
Change in the black image sensor sensitivity (When
the set value is increased, the image density is
increased. When the set value is decreased, the
image density is decreased.)
the set value is increased, the image density is
increased. When the set value is decreased, the
image density is decreased.)
Y_PAT_TARGET_ID
90
—
Change in the process correction (Yellow image high
density section image density correction) level (When
the set value is increased, the image density in the
high density section is increased and abnormal copy
is decreased. When the set value is decreased, the
image density in the high density section is
decreased and abnormal copy is increased.)
density section image density correction) level (When
the set value is increased, the image density in the
high density section is increased and abnormal copy
is decreased. When the set value is decreased, the
image density in the high density section is
decreased and abnormal copy is increased.)
Color image high density section
abnormal copy, improper image
density, improper copy, improper
color balance, toner dispersion,
developer dispersion
abnormal copy, improper image
density, improper copy, improper
color balance, toner dispersion,
developer dispersion
M_PAT_TARGET_ID
100
—
Change in the process correction (Magenta image
high density section image density correction) level
(When the set value is increased, the image density
in the high density section is increased and abnormal
copy is decreased. When the set value is decreased,
the image density in the high density section is
decreased and abnormal copy is increased.)
high density section image density correction) level
(When the set value is increased, the image density
in the high density section is increased and abnormal
copy is decreased. When the set value is decreased,
the image density in the high density section is
decreased and abnormal copy is increased.)
C_PAT_TARGET_ID
83
—
Change in the process correction (Cyan image high
density section image density correction) level (When
the set value is increased, the image density in the
high density section is increased and abnormal copy
is decreased. When the set value is decreased, the
image density in the high density section is
decreased and abnormal copy is increased.)
density section image density correction) level (When
the set value is increased, the image density in the
high density section is increased and abnormal copy
is decreased. When the set value is decreased, the
image density in the high density section is
decreased and abnormal copy is increased.)
K_PAT_TARGET_ID
15 (AR-
C100/
C150)
C150)
22 (AR-
C160/
C250/
C270)
C250/
C270)
—
Change in the process correction (Black image high
density section image density correction) level (When
the set value is increased, the image density in the
high density section is decreased and abnormal copy
is increased. When the set value is decreased, the
image density in the high density section is increased
and abnormal copy is decreased.)
density section image density correction) level (When
the set value is increased, the image density in the
high density section is decreased and abnormal copy
is increased. When the set value is decreased, the
image density in the high density section is increased
and abnormal copy is decreased.)
Black image high density section
abnormal copy, improper image
density, improper copy, improper
color balance, toner dispersion,
developer dispersion
abnormal copy, improper image
density, improper copy, improper
color balance, toner dispersion,
developer dispersion
7 – 35
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