Sharp AR-C260 (serv.man11) Service Manual ▷ View online
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 21
This adjustment must be performed in the following cases:
• When the scanner (reading) section is disassembled.
• When the scanner (reading) unit is replaced.
• When the resist roller section is disassembled.
• When a U2 trouble occurs.
• When the MFP main PWB is replaced.
• When the EEPROM of the MFP main PWB is replaced.
This adjustment uses SIM 50-2 and SIM 50-1.
The above two simulations are used in the following manner.
SIM 50-2: Rough adjustment
SIM 50-1: Fine adjustment
If the desired value is obtained by SIM 50-2, there is no need to per-
form SIM 50-1.
form SIM 50-1.
(Adjustment item)
Adjustment items 1 to 3 can be adjusted either with SIM 50-1 or with
SIM 50-2.
SIM 50-2.
The adjustment values 6 and 7 will affect the adjustment items 4 and 5
automatically.
automatically.
Therefore, adjusting the items 6 and 7 will lead to the same result as
adjusting the items 4 and 5 directly.
adjusting the items 4 and 5 directly.
1) Place a scale on the original table as shown below.
Note that the scale must be placed in parallel with the scanning
direction and that the scale lead edge must be in close contact with
the original guide plate.
direction and that the scale lead edge must be in close contact with
the original guide plate.
2) Enter the SIM 50-2 mode.
3) Set IMAGE LOSS and DEN-A to "20".
4) Set all the set items of L1 and L2 to "0".
5) Make a copy at 400%. (Original table mode)
6) Measure the copied image dimensions X and Y.
X: Distance between the copy image lead edge and the scale of
10mm.
Y: Distance between the paper lead edge and the copy image
lead edge.
7) Multiply X, Y, and Z (unit: mm) by 10 to obtain L1, L2 respectively.
Enter the values of L1, L2, and L3.
L1 = X x 10
L2 = Y x 10
8) Cancel the simulation, make a copy, and check that the lead edge
image loss and void area are within the specified range shown
below.
below.
Lead edge image loss: 4.0 ± 1.0mm
Lead edge void area: 4.0 ± 1.0mm
If the above specifications are not satisfied, perform the following pro-
cedures.
cedures.
9) Enter the SIM 50-1 mode.
10) Set a scale in the same manner as procedure 3), and make a copy
at 50% and at 400% in the original table mode.
11) Measure the distance between the paper lead edge and the copy
image lead edge of 50% copy and of 400% copy.
12) Check that there is no difference between the above distance of
50% copy and that of 400% copy.
If there is a difference of 1.5mm or above, change the adjustment
value of RRC-A.
value of RRC-A.
Repeat procedures 10) to 12) until the above specification is satisfied.
13) If the lead edge void area is not within the specified range, change
the DEN-A value.
14) If the lead edge void area is not within the specified range, change
the IMAGE LOSS value.
15) If the rear edge void area is not within the specified range, change
the DEN-B value.
ADJ 10
Copy image position/image loss/
void area adjustment
void area adjustment
No.
Adjustment item
SIM 50-2
set item
SIM 50-1
set item
Adjustment
value
1
Lead edge image loss
IMAGE
LOSS
LOSS
IMAGE
LOSS
LOSS
4.0 ±
1.0mm
2
Lead edge void area
DEN-A
DEN-A
4.0 ±
1.0mm
3
Rear edge void area
DEN-B
DEN-B
4.0 ±
1.0mm
4
Image reference position
RRC-A
5
Paper timing
RRC-B
6
Distance between image lead
edge position and scale of
10mm x 10
edge position and scale of
10mm x 10
L1
7
Distance between paper lead
edge and image lead edge x 10
edge and image lead edge x 10
L2
10 20 30 40 50 60 70 80 90 50 100110120130140
10
20
30
40
50
X
Y
Paper lead
edge
edge
400% enlarged copy
Image loss
Lead edge void area
Rear edge void area
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 22
(1) Note for the copy color balance/density adjustment
(Necessary conditions for execution of the copy color balance/density adjustment)
Before execution of the copy color balance/density adjustment, check that all the adjustments related to the copy color balance and density have been
completed properly.
completed properly.
The importance level is as shown below.
(Adjustment items which directly affect the copy color balance and density and must be checked or adjusted before
execution of the image quality adjustment)
execution of the image quality adjustment)
1) Adjustment items: ADJ 2, ADJ 3, ADJ 4
The user color balance adjustment must be set to the center (default).
The set value of SIM 46-27 is set to the default.
The set value of the following simulation must be set to the default.
Adjustment item
Adjustment
value
Note
IMAGE
LOSS
LOSS
Lead edge image
loss
loss
4.0 ±
1.0mm
The greater the set value is,
the greater the image loss is.
the greater the image loss is.
DEN-A
Lead edge void
area
area
4.0 ±
1.0mm
The greater the set value is,
the greater the void area is.
the greater the void area is.
DEN-B
Rear edge void
area
area
4.0 ±
1.0mm
The greater the set value is,
the greater the void area is.
the greater the void area is.
ADJ 11
Copy color balance/density adjustment
JOB No
ADJUSTMENT ITEM LIST
SIMULATION
ADJ 2
Image density sensor adjustment
44-36
ADJ 3
Image focus, image skew adjustment (LED (writing) unit)
64-1/61-4
ADJ 4
Image registration adjustment
ADJ 4A
Image registration adjustment (Auto adjustment)
50-22
ADJ 4B
Image registration adjustment (Manual adjustment)
50-20
Item
Purpose
Note
User color balance setting: Default (Center) (Special function)
Set the color balance to the standard state.
Check that it is set to the center.
SIM
No
Display/Item
Setting
(Default)
Content
Phenomenon when the set
value is changed
Phenomenon occurring
when the adjustment
value is not within the
normal value range.
Note
46-27
A
BLACK TEXT
(SLOPE)
(SLOPE)
50
Black image edge section
gamma (tilt) adjustment
(Black text and black line
reproduction adjustment)
gamma (tilt) adjustment
(Black text and black line
reproduction adjustment)
When the set value is
increased, the contrast of
black line and black text
outline sections is reduced. On
the contrary, when the set
value is decreased, the
contrast is increased.
(Sharpness of black text and
black lines is changed.) (Text/
Printed photo, Text, Text/
Photograph copy mode)
increased, the contrast of
black line and black text
outline sections is reduced. On
the contrary, when the set
value is decreased, the
contrast is increased.
(Sharpness of black text and
black lines is changed.) (Text/
Printed photo, Text, Text/
Photograph copy mode)
The contrast and density
of lines and text outline
section are changed.
(Sharpness of text and
lines is changed.) (Text/
Printed photo, Text, Text/
Photograph copy mode)
of lines and text outline
section are changed.
(Sharpness of text and
lines is changed.) (Text/
Printed photo, Text, Text/
Photograph copy mode)
For image
quality
adjustment, set
to 50.
quality
adjustment, set
to 50.
B
BLACK TEXT
(INTERCEPT)
(INTERCEPT)
50
Black image edge section
density (overall level)
adjustment (Black txt and
black line reproduction
adjustment)
density (overall level)
adjustment (Black txt and
black line reproduction
adjustment)
The density of black lines and
black text outline is changed.
(Text/Printed photo, Text,
Text/Photograph copy mode)
black text outline is changed.
(Text/Printed photo, Text,
Text/Photograph copy mode)
SIMNo
Item
Setting
(Default)
Phenomenon when the set value is
changed
Note
46-1
A – R
50
The density and color balance in the low
density section of color copy are changed.
density section of color copy are changed.
Set to the default when adjusting the copy quality.
Do not adjust the density in the low density section by using this
simulation.
Do not adjust the density in the low density section by using this
simulation.
46-2
A – O
50
The density in the low density section of
monochrome copy is changed.
monochrome copy is changed.
46-10 to 16
A – O
500
The color copy density and color balance
are changed. (each copy mode)
are changed. (each copy mode)
Set to the default when adjusting the copy quality.
46-20
A – O
500
The color copy density and color balance
of all copy modes are changed.
of all copy modes are changed.
Set to the default when adjusting the copy quality.
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 23
The following functions (HV/HT/TC/RRM/MD) of SIM 44-1 must be set to Enable.
(Adjustment items which affect the copy color balance/density but need not to be adjusted frequently. When, however, a
trouble occurs, check and adjustment must be made.)
trouble occurs, check and adjustment must be made.)
1) Adjustment item: ADJ 1, ADJ 7, ADJ 12, ADJ 13
(Relationship between the service contents and the copy color balance/density adjustment)
Note that procedures before and after the copy color balance/density adjustment differ depending on the machine status and the servicing job con-
tents.
tents.
Perform proper procedures according to the flow of the copy color balance/density adjustment.
There are following five major cases:
1) When installing
2) When periodic maintenance
3) When consumable part is replaced in repair work
4) When consumable part is not replaced in repair/checking work
5) Other repair/check
Item
Setting
Phenomenon when set to Disable
HV
Image forming section
correction (process
correction) (High-density
image density correction)
correction (process
correction) (High-density
image density correction)
ENABLE
The developing bias voltage correction and the
main charger grid voltage correction are not
performed.
main charger grid voltage correction are not
performed.
Insufficient image density, background coy,
improper color balance
improper color balance
HT
Half-tone image density
correction
correction
ENABLE
The half-tone image density correction is not
performed.
performed.
Improper half-tone image density, background
copy, improper color balance, tone jump
copy, improper color balance, tone jump
TC
Transfer output correction
ENABLE
Correction of change due to humidity and
correction of the transfer voltage are not
performed.
correction of the transfer voltage are not
performed.
Half-ton image section roughness, improper
image density, insufficient density inside of
image outlines
image density, insufficient density inside of
image outlines
RRM
RRM speed correction
ENABLE
Correction of change due to humidity and
correction of the rotate speed are not
performed.
correction of the rotate speed are not
performed.
Improper color balance, roughness,
background coy, toner dispersion, improper
image density, image deflection, image flow,
image dirt
background coy, toner dispersion, improper
image density, image deflection, image flow,
image dirt
MD
Photoconductor
membrane decrease
(sensitivity/potential)
correction
membrane decrease
(sensitivity/potential)
correction
ENABLE
Correction of use frequency (sensitivity
change) of OPC drum is not performed. (Main
charger grid voltage correction)
change) of OPC drum is not performed. (Main
charger grid voltage correction)
Improper image density, background copy
AR
Image registration
automatic adjustment
automatic adjustment
Does not affect during image quality
adjustment.
adjustment.
AR CHK
YES/NO of error
judgment in image
registration automatic
adjustment
judgment in image
registration automatic
adjustment
Does not affect during image quality
adjustment.
adjustment.
JOB No
ADJUSTMENT ITEM LIST
SIMULATION
ADJ 1
High voltage adjustment
ADJ 1A
Main charger grid voltage adjustment
8-2
ADJ 1B
DV bias voltage adjustment
8-1
ADJ 1C
Transfer voltage adjustment
8-6
ADJ 7
Copy image focus (main scanning direction copy magnification ratio) adjustment (CCD unit position adjustment)
48-1
ADJ 12 Fusing pressure adjustment
ADJ 13 Fusing paper guide position adjustment
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 24
(2) Copy color balance/density adjustment procedure flow
Follow the flowchart to perform the copy color balance/density adjustment.
START
Perform ADJ 11A
CCD gamma adjustment.
SIM 63-3 (Normal document mode)
Check the copy color balance/density adjustment.
(Manual operation) Text/Printed photo mode
(Test chart UKOG-0162FCZZ/UKOG-0283FCZZ is used.)
Are the copy
color balance and density
at satisfactory
levels?
YES
NO
(Next page)
(Next page)
Is the CCD replaced?
YES
NO
Set the SIT chart
(UKOG-0280FCZZ) on
the original table.
Enter the SIM 63-03
mode and press the
EXECUTE key.
Check the copy color balance/density adjustment.
(Manual operation) Text/Printed photo mode
(Test chart UKOG-0162FCZZ/UKOG-0283FCZZ is used.)
Process correction is forcibly
performed. (SIM 44-6)
Execute the half tone image
correction. (SIM 44-26)
The necessary work items for each condition are marked with "
∗
."
When replacing a consumable part, /when repairing or checking
(without replacement of a consumable part) /
when installing the machine, follow the workflow below.
(without replacement of a consumable part) /
when installing the machine, follow the workflow below.
: Standard adjustment flow
When servicing (When a consumable part is replaced)/maintenance
JOB No
Work item
Simulation
When
installing
After replacing
OPC drum
After replacement
of the image
density sensor
After replacing
transfer belt
After cleaning
scanner
(reading) section
When in
periodic
maintenance
When in
repair/check
(without replacing
consumable parts)
ADJ 2
Image density sensor adjustment
OPC drum counter clear
Transfer section waste toner counter clear
Set the half tone correction level to zero. (Reset)
44-13
∗
∗
∗
∗
∗
∗
∗
∗
∗
24-7
24-8
∗
∗
∗
∗
44-27
∗
ADJ 3
ADJ 4
Image focus, image skew adjustment
(LED (writing) unit)
(LED (writing) unit)
Image registration adjustment
64-1/61-4
50-22/50-20
1 '
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