Sharp AR-285 (serv.man12) Service Manual ▷ View online
46 - 17
Purpose
Setting/Operation data output/Check (Display/Print)
Function
(Purpose)
(Purpose)
Used to execute shading correction and display the correction value.
Section
Item
Operation
Operation/
Procedure
Procedure
1. Select the set item with [
↑
], [
↓
] keys.
(The selected item is highlighted.)
2. Press the [EXECUTE] key.
The shading correction is executed and the correction value is displayed.
Note
48
48 - 1
Purpose
Adjustment
Function
(Purpose)
(Purpose)
Used to adjust the copy magnification ratio (main scanning direction, sub scanning direction).
Section
ICU
Item
Picture quality
Operation/
Procedure
Procedure
1. Select the adjustment mode with [
↑
], [
↓
] keys.
2. Enter the adjustment value with the 10-key.
3. Press the [OK] key.
The value entered in procedure 2 is set.
a. Sub scan direction magnification ratio --- (SCAN)
The horizontal print magnification ratio (in the paper transport direction) of the image is adjusted by changing the
scan speed in the paper transport direction.
scan speed in the paper transport direction.
b. Main scan direction magnification ratio --- (F-R)
The vertical print magnification ratio (front frame to near frame) is adjusted in the image process section by the
software operation.
software operation.
c. Sub scan direction magnification ration adjustment value (When SPF is used) --- (SPF)
SPF The horizontal print magnification ratio (in the paper transport direction) is adjusted by changing the SPF
document transport speed.
document transport speed.
(When the set value is changed by 1, the magnification ratio is changed by about 0.1%.)
Default: 50
Note
8 – 99
50
50 - 1
Purpose
Adjustment
Function
(Purpose)
(Purpose)
Used to adjust the copy image position and the void area (image loss) on the print paper in the copy mode. (The
same adjustment can be made with SIM 50-2 (simple method).)
same adjustment can be made with SIM 50-2 (simple method).)
Section
Item
Picture quality
Image position
Operation/
Procedure
Procedure
1. Select the adjustment item with [
↑
] [
↓
] keys.
2. Enter the adjustment value with the 10-key.
3. Press the [OK] key. (The adjustment value entered in procedure 2 is set.)
3. Press the [OK] key. (The adjustment value entered in procedure 2 is set.)
(RRC-A)
This set value is used to align the document image lead edge ad the scan image data lead edge in the document table
scan mode.
After starting scanning, the image lead edge position is determined by using the scanner home position detection
signal (MHPS) OFF timing as the reference.
RRC-A set value = Time (distance) from the output of the scanner home position detection signal (MHPS OFF) to the
image lead edge position.
(0 - 99: Default value 50)
If this setting is not made properly, the image lead edge position (image loss) varies depending on the copy
magnification ratio.
When the set value is increased, the image position is shifted in the advancing direction on the paper.
When the set value is changed by 1, the image lead edge position is varied by about 0.24mm.
This set value is used to align the document image lead edge ad the scan image data lead edge in the document table
scan mode.
After starting scanning, the image lead edge position is determined by using the scanner home position detection
signal (MHPS) OFF timing as the reference.
RRC-A set value = Time (distance) from the output of the scanner home position detection signal (MHPS OFF) to the
image lead edge position.
(0 - 99: Default value 50)
If this setting is not made properly, the image lead edge position (image loss) varies depending on the copy
magnification ratio.
When the set value is increased, the image position is shifted in the advancing direction on the paper.
When the set value is changed by 1, the image lead edge position is varied by about 0.24mm.
(SPF)
This set value is used to align the document image lead edge position and the scan image data lead edge position in
the SPF scan mode.
After starting scanning, the image lead edge position is determined by using the resist sensor detection signal (REGS
ON) timing as the reference.
RRC-A set value = Time (distance) from the output (resist sensor detection signal (REGS ON) to the image lead edge
position.
(0 - 99: Default 50)
If this setting is not made properly, the image lead edge position (image loss) on the copy paper may vary depending
on the copy magnification ratio.
When the set value is increased, the image position is shifted in the advancing direction of the copy paper.
When the set value is changed by 1, the image lead edge position is changed by about 0.1mm.
This set value is used to align the document image lead edge position and the scan image data lead edge position in
the SPF scan mode.
After starting scanning, the image lead edge position is determined by using the resist sensor detection signal (REGS
ON) timing as the reference.
RRC-A set value = Time (distance) from the output (resist sensor detection signal (REGS ON) to the image lead edge
position.
(0 - 99: Default 50)
If this setting is not made properly, the image lead edge position (image loss) on the copy paper may vary depending
on the copy magnification ratio.
When the set value is increased, the image position is shifted in the advancing direction of the copy paper.
When the set value is changed by 1, the image lead edge position is changed by about 0.1mm.
(RRC-B)
This set value is used to adjust the relative positions of the image position on the OPC drum and the copy paper.
This adjustment is made by adjusting the time from the output timing of the image lead edge signal (LD START signal)
to RRC ON.
At the timing of LD START signal output, the print image is made on the OPC drum at an optional position with the
laser beam.
(0 - 99: Default 50)
Actually the RRC ON timing is determined as follows:
RRC ON timing = This set value (RRC-B) - Lead edge void set value (DEN-A)
When the set value is increased, the RRC ON timing is delayed, decreasing the led edge void area.
When the set value is changed by 1, the lead edge void area is changed by about 0.17mm.
(Note)
The value of RRC-A must be properly set in advance to this adjustment.
This set value is used to adjust the relative positions of the image position on the OPC drum and the copy paper.
This adjustment is made by adjusting the time from the output timing of the image lead edge signal (LD START signal)
to RRC ON.
At the timing of LD START signal output, the print image is made on the OPC drum at an optional position with the
laser beam.
(0 - 99: Default 50)
Actually the RRC ON timing is determined as follows:
RRC ON timing = This set value (RRC-B) - Lead edge void set value (DEN-A)
When the set value is increased, the RRC ON timing is delayed, decreasing the led edge void area.
When the set value is changed by 1, the lead edge void area is changed by about 0.17mm.
(Note)
The value of RRC-A must be properly set in advance to this adjustment.
(IMAGE LOSS)
This set value (timing adjustment value) is used to determine the lead edge image loss and the image lead edge
reference position by using the scan image lead edge position set with RRC-A.
Effective print data is determined from the image lead edge position data scanned with this set value.
The image lead edge reference position on the document is at 2mm from the right of the document position alignment
plate.
The effective image (effective image data) is determined by scanning the image.
(0 - 99: Default 20)
When the set value is increased, the image loss becomes greater.
When the set value is changed by 1, the image loss is changed by about 0.1mm.
This set value (timing adjustment value) is used to determine the lead edge image loss and the image lead edge
reference position by using the scan image lead edge position set with RRC-A.
Effective print data is determined from the image lead edge position data scanned with this set value.
The image lead edge reference position on the document is at 2mm from the right of the document position alignment
plate.
The effective image (effective image data) is determined by scanning the image.
(0 - 99: Default 20)
When the set value is increased, the image loss becomes greater.
When the set value is changed by 1, the image loss is changed by about 0.1mm.
(DEN-A)
Used to set the timing for the RRC ON timing (paper timing) set with EEC-B.
RRC ON timing = (RRC-B) - Lead edge void set value (DEN-A)
When this adjustment value is changed, the print image position for the paper position is changed. As a result, the
lead edge void area is also changed.
When the set value is increased, the RRC ON timing is advanced and the lead edge void area becomes greater.
When the set value is changed by 1, the lead edge void area is changed by about 0.1mm.
(0 - 99: Default value 50)
Used to set the timing for the RRC ON timing (paper timing) set with EEC-B.
RRC ON timing = (RRC-B) - Lead edge void set value (DEN-A)
When this adjustment value is changed, the print image position for the paper position is changed. As a result, the
lead edge void area is also changed.
When the set value is increased, the RRC ON timing is advanced and the lead edge void area becomes greater.
When the set value is changed by 1, the lead edge void area is changed by about 0.1mm.
(0 - 99: Default value 50)
8 – 100
(DEN-B)
The rear edge void area is adjusted by controlling the effective print data length with the image lead edge signal (LD
START signal) output from the ICU as the reference.
The effective image (effective image data) is determined when scanning the image.
When the set value is increased, the rear edge void area becomes great.
When the set value is changed by 1, the rear void area is changed by about 0.24mm.
(0 - 99: Default 50)
The rear edge void area is adjusted by controlling the effective print data length with the image lead edge signal (LD
START signal) output from the ICU as the reference.
The effective image (effective image data) is determined when scanning the image.
When the set value is increased, the rear edge void area becomes great.
When the set value is changed by 1, the rear void area is changed by about 0.24mm.
(0 - 99: Default 50)
Adjust in the following sequence:
1) Set the image loss amount (IMAGE LOSS) and the paper lead edge void amount (DEN-A) to arbitrary values (20).
(0
∼
99: 0.1mm/step)
2) Adjust the document scan start position (RRC-A) so that the actual copy image loss becomes the value set in
procedure 1. (0
∼
99: 0.24mm/step)
3) Adjust the resist roller clutch ON timing (RRC-B) so that the actual copy image loss becomes the value set in
procedure 1. (0
∼
99: 0.17mm/step)
4) Adjust the rear edge void amount (DEN-B). (0
∼
99: 0.1mm/step)
Code
Adjustment item
Adjustment value
Note
IMAGE LOSS
Lead edge image loss
1.5 to 3.0mm
The greater the set value is, the greater the
image loss is.
image loss is.
DEN-A
Lead edge void area
1.5 to 3.0mm
The greater the set value is, the greater the
void area is.
void area is.
DEN-B
Rear edge void area
1.5 to 3.0mm
The greater the set value is, the greater the
void area is.
void area is.
Note
8 – 101
50 - 2
Purpose
Adjustment
Function
(Purpose)
(Purpose)
Used to adjust the copy image position and the void area (image loss) on the print paper in the copy mode.
(Simple adjustment)
(This simulation allows the same simulation with SIM 50-1 more simply. )
(Simple adjustment)
(This simulation allows the same simulation with SIM 50-1 more simply. )
Section
Item
Picture quality
Image position
Operation/
Procedure
Procedure
1. Select the adjustment item with [
↑
], [
↓
] keys.
2. Enter the adjustment value with the 10-key.
3. Press the [OK] key. (The value entered in procedure 2 is set.)
3. Press the [OK] key. (The value entered in procedure 2 is set.)
IMAGE LOSS
DEN-A
DEN-B
DEN-A
DEN-B
Same as SIM 50-1
This simulation is used to automatically adjust the image loss, the void area, and the image position by directly entering
the paper lead edge and the image shift (in the unit of 0.1mm) in 400% (200% for the SPF) copy.
the paper lead edge and the image shift (in the unit of 0.1mm) in 400% (200% for the SPF) copy.
a. Distance (Document table mode 400%) up to the scale of 10mm from the image lead edge a L3
b. Distance from the paper lead edge to the image lead edge
→
L2
c. Distance from the image lead edge to the scale of 10mm (SPF mode 200%)
×
L3
The measurement value is multiplied with 10 to enter.
With the above procedure, the values of RRC-A and RRC-B in SIM 50-1 are automatically calculated and set.
By directly setting the values (actual dimensions [mm] x 10) of IMAGE LOSS, DEN-A and DEN-B, the lead edge image
loss, the lead edge void area, and the rear edge void area can be set.
By directly setting the values (actual dimensions [mm] x 10) of IMAGE LOSS, DEN-A and DEN-B, the lead edge image
loss, the lead edge void area, and the rear edge void area can be set.
(Standard)
Code
Adjustment item
Adjustment value
Note
A
L1
Distance between the image lead
edge and the scale of 10mm.
edge and the scale of 10mm.
When the image lead edge
position varied depending on the
copy magnification ratio, change
the set value.
position varied depending on the
copy magnification ratio, change
the set value.
B
L2
Distance between the paper lead
edge and the image lead edge.
edge and the image lead edge.
C
L3
Distance between the image lead
edge and the scale of 10mm (SPF
mode).
edge and the scale of 10mm (SPF
mode).
When the image lead edge
position varied depending on the
copy magnification ratio, change
the set value.
position varied depending on the
copy magnification ratio, change
the set value.
D
IMAGE LOSS
Lead edge image loss
1.5 to 3.0mm
The greater the set value is, the
greater the image loss is.
greater the image loss is.
E
DEN-A
Lead edge void area
1.5 to 3.0mm
The greater the set value is, the
greater the void area is.
greater the void area is.
F
DEN-B
Rear edge void area
1.5 to 3.0mm
The greater the set value is, the
greater the void area is.
greater the void area is.
Note
8 – 102
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