Sharp MX-1800N (serv.man14) Service Manual ▷ View online
MX-1800N ADJUSTMENTS 6 – 25
If the copy magnification ratio is not satisfactory, perform the
following procedures.
following procedures.
7) Remove the document table glass.
8) Remove the dark box cover.
9) To prevent against shift of the CCD unit optical axis, mark the
8) Remove the dark box cover.
9) To prevent against shift of the CCD unit optical axis, mark the
CCD unit base as shown below.
* This procedure must be executed also when the CCD unit is
replaced.
10) Loosen the CCD unit fixing screws.
* Never loosen the screws marked with ✕.
If any one of these screws is loosened, the position and the
angle of the CCD unit base may be changed to cause a
problem, which cannot be adjusted in the market. In that
case, the whole scanner unit must be replaced.
angle of the CCD unit base may be changed to cause a
problem, which cannot be adjusted in the market. In that
case, the whole scanner unit must be replaced.
11) Slide the CCD unit in the arrow direction (CCD sub scanning
direction) to change the installing position.
When the copy image is longer than the original scale, shift the
CCD unit in the direction B. When the copy image is shorter
than the original scale, shift the CCD unit in the direction A.
One scale of mark-off line corresponds to 0.2%.
At that time, fix the CCD unit so that it is in parallel with the
scale on the front and the rear side of the CCD unit base.
* Fix the CCD unit so that it is in parallel with the line marked
When the copy image is longer than the original scale, shift the
CCD unit in the direction B. When the copy image is shorter
than the original scale, shift the CCD unit in the direction A.
One scale of mark-off line corresponds to 0.2%.
At that time, fix the CCD unit so that it is in parallel with the
scale on the front and the rear side of the CCD unit base.
* Fix the CCD unit so that it is in parallel with the line marked
in procedure 9).
12) Make a copy and check the copy magnification ratio again.
If the copy magnification ratio is not in the range of 100
± 1%,
repeat the procedures of 9) – 11) until the condition is satisfied.
NOTE: By changing the CCD unit fixing position with the simula-
tion 48-1 adjustment value at 50, the copy magnification
ratio is adjusted within the specified range (100
ratio is adjusted within the specified range (100
± 1.0%)
and the specified resolution is obtained based on the opti-
cal system structure.
cal system structure.
ADJ 13
Scan image skew adjustment
(RSPF) (Refer to MX-RPX1 SM.)
(RSPF) (Refer to MX-RPX1 SM.)
ADJ 14
Scan image magnification ratio
adjustment (Document table
mode)
adjustment (Document table
mode)
This adjustment is required in the following cases:
* When the copy image magnification ration in the sub scanning
* When the copy image magnification ration in the sub scanning
direction is not properly adjusted.
* When the scanner motor is replaced.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
Before this adjustment, the focus adjustment (CCD unit installing
position adjustment) must have been completed.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
Before this adjustment, the focus adjustment (CCD unit installing
position adjustment) must have been completed.
10
20
90
100
110
10
20
90
100
110
1.0mm
100mm scale
(Original)
(Original)
Copy image
(1mm (1%)
shorter than
the original)
(1mm (1%)
shorter than
the original)
B
A
MX-1800N ADJUSTMENTS 6 – 26
14-A
Scan image magnification ratio adjustment
(Main scanning direction) (Document table
mode)
(Main scanning direction) (Document table
mode)
1) Place a scale on the document table as shown in the figure
below.
2) Enter the simulation 48-1 mode.
3) Make a normal copy and obtain the copy magnification ratio.
Touch [CLOSE] key and shift from the simulation mode to the
copy mode and make a copy.
copy mode and make a copy.
4) Check that the copy magnification ratio is within the specified
range (100
± 1.0%).
If the copy magnification ratio is within the specified range (100
± 1.0%), the adjustment is completed. If the copy magnification
ratio is not within the specified range, perform the following
procedure.
± 1.0%), the adjustment is completed. If the copy magnification
ratio is not within the specified range, perform the following
procedure.
5) Change the CCD (MAIN) adjustment value of Simulation 48-1.
When the adjustment value is increased, the copy magnifica-
tion ratio in the sub scanning direction is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.
Repeat the procedures 3) – 5) until the copy magnification
ratio is within the specified range (100
tion ratio in the sub scanning direction is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.
Repeat the procedures 3) – 5) until the copy magnification
ratio is within the specified range (100
± 1.0%).
14-B
Scan image magnification ratio adjustment
(Sub scanning direction) (Document table
mode)
(Sub scanning direction) (Document table
mode)
1) Place a scale on the document table as shown in the figure
below.
2)
Enter the simulation 48-1 mode.
3)
Make a normal copy and obtain the copy magnification ratio.
Touch [CLOSE] key and shift from the simulation mode to the
copy mode and make a copy.
Touch [CLOSE] key and shift from the simulation mode to the
copy mode and make a copy.
4)
Check that the copy magnification ratio is within the specified
range (100
range (100
± 1.0%).
If the copy magnification ratio is within the specified range (100
± 1.0%), the adjustment is completed. If the copy magnification
ratio is not within the specified range, perform the following
procedure.
± 1.0%), the adjustment is completed. If the copy magnification
ratio is not within the specified range, perform the following
procedure.
5)
Change the CCD (SUB) adjustment value of Simulation 48-1.
When the adjustment value is increased, the copy magnifica-
tion ratio in the sub scanning direction is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.
When the adjustment value is increased, the copy magnifica-
tion ratio in the sub scanning direction is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.
Repeat the procedures 3) – 5) until the copy magnification ratio is
within the specified range (100
within the specified range (100
± 1.0%).
ADJ 15
Scan image magnification ratio
adjustment (RSPF mode) (Refer
to the MX-RPX1 SM.)
adjustment (RSPF mode) (Refer
to the MX-RPX1 SM.)
15-A
Scan image magnification ratio adjustment
(Main scanning direction) (RSPF mode)
(Refer to the MX-RPX1 SM.)
(Main scanning direction) (RSPF mode)
(Refer to the MX-RPX1 SM.)
15-B
Scan image magnification ratio adjustment
(Sub scanning direction) (RSPF mode)
(Refer to the MX-RPX1 SM.)
(Sub scanning direction) (RSPF mode)
(Refer to the MX-RPX1 SM.)
10
20
30
40
50
60
70
80
90
100
1
10
120
120
1
30
140
140
1
50
CLOSE
0
A:
A㧦xx
B㧦xx
C㧦xx
D㧦xx
㧧
CCD(MAIN)
㧧
CCD(SUB)
㧧
SPF(MAIN)
㧧
SPF(SUB)
SIMULATION NO.48-01
MAGNIFICATION ADJUSTMENT
xx
1 99
OK
TEST
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
CLOSE
0
A:
A㧦xx
B㧦xx
C㧦xx
D㧦xx
㧧
CCD(MAIN)
㧧
CCD(SUB)
㧧
SPF(MAIN)
㧧
SPF(SUB)
SIMULATION NO.48-01
MAGNIFICATION ADJUSTMENT
xx
1 99
OK
TEST
10
20
90
100
110
10
20
90
100
110
10
20
90
100
110
Copy magnification ratio
(Original dimension – Copy dimension)
Original dimension
=
x 100 [%]
(Example 1)
Copy A
(Shorter than
the original)
Copy A
(Shorter than
the original)
Scale
(Original)
(Original)
(Example 2)
Copy B
(Longer than
the original)
Copy B
(Longer than
the original)
MX-1800N ADJUSTMENTS 6 – 27
ADJ 16
Scan image off-center
adjustment
adjustment
This adjustment is required in the following cases:
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When the RSPF section is disassembled.
* When the RSPF unit is installed.
* When the RSPF unit is replaced.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When the RSPF section is disassembled.
* When the RSPF unit is installed.
* When the RSPF unit is replaced.
* When a U2 trouble occurs.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
16-A
Scan image off-center (Document table
mode)
mode)
1) Make a copy of the adjustment chart (made by your self) in the
adjustment mode (document table or RSPF).
2) Check the copy image center position.
If A – B =
± 1.0mm, the adjustment is not required.
If the above condition is not satisfied, perform the following
procedures.
procedures.
3) Enter the simulation 50-12 mode.
4)
Select the adjustment mode OC with the scroll key.
5)
Enter the adjustment value with 10-key, and touch [OK] key.
The entered value is set.
When the set value is increased, the main scanning print posi-
tion is shifted to the front side by 0.1mm.
The entered value is set.
When the set value is increased, the main scanning print posi-
tion is shifted to the front side by 0.1mm.
6)
Touch [CLOSE] key and shift from the simulation mode to the
copy mode and make a copy.
Repeat the procedures of 2) – 6) until the above condition is
satisfied.
copy mode and make a copy.
Repeat the procedures of 2) – 6) until the above condition is
satisfied.
16-B
Scan image off-center (RSPF mode) (Refer
to the MX-RPX1 SM.)
to the MX-RPX1 SM.)
ADJ 17
Print area (Void area)
adjustment (Print engine
section)
adjustment (Print engine
section)
This adjustment is required in the following cases:
* When the LSU is replaced or removed.
* When the paper tray is replaced.
* When the paper tray section is disassembled.
* When the manual paper feed tray is replace.
* When the manual paper feed tray is disassembled.
* When the duplex section is disassembled.
* When the duplex section is installed or replaced.
* When the large capacity paper feed tray is installed or replace.
* When the large capacity paper feed tray section is disassembled.
* When the resist roller section is disassembled.
* When a U2 trouble occurs.
* When the PCU PWB is replaced.
* When the EEPROM on the PCU PWB is replaced.
(Caution)
Before executing this adjustment, be sure to execute ADJ 8 Print
image magnification ratio adjustment (BK) (Main scanning direc-
tion) (Print engine section) in advance.
1)
* When the LSU is replaced or removed.
* When the paper tray is replaced.
* When the paper tray section is disassembled.
* When the manual paper feed tray is replace.
* When the manual paper feed tray is disassembled.
* When the duplex section is disassembled.
* When the duplex section is installed or replaced.
* When the large capacity paper feed tray is installed or replace.
* When the large capacity paper feed tray section is disassembled.
* When the resist roller section is disassembled.
* When a U2 trouble occurs.
* When the PCU PWB is replaced.
* When the EEPROM on the PCU PWB is replaced.
(Caution)
Before executing this adjustment, be sure to execute ADJ 8 Print
image magnification ratio adjustment (BK) (Main scanning direc-
tion) (Print engine section) in advance.
1)
Enter the simulation 50-10 mode.
Ń
łġľġŃ
ł
ŃĨ
łĨġĮġŃĨġľġȾIJįıŮŮ
łĨ
ĩIJııɓĪ
0
A:
A㧦xx
B㧦xx
㧧
OC
㧧
SPF(SIDE1)
SIMULATION NO.50-12
ORGINAL CENTER OFFSET SETUP
xx
㨇
1㨪 99 㨉
OK
TEST
CLOSE
C㧦xx
㧧
SPF(SIDE2)
EXECUTE
EXECUTE
0
A:
Aȇxxx
Bȇ xx
Ȉġ
BK-MAG
Ȉġ
MTF
SIMULATIONġ NO.50-10
PAPER CENTER OFFSET SETUP
xxx
60 140
OK
TEST
EXECUTE
CLOSE
Cȇ xx
Ȉġ
CS1
Dȇxx
Ȉġ
CS2
0
A:ġ
Aȇ xxx
Bȇ xx
Ȉġ
BK-MAG
Ȉġ
MTF
SIMULATIONġ NO.50-10
PAPER CENTER OFFSET SETUP
xxx
60 140
OK
TEST
EXECUTE
CLOSE
Cȇ xx
Ȉġ
CS1
Dȇ xx
Ȉġ
CS2
End of print
MX-1800N ADJUSTMENTS 6 – 28
2) Set A4 (11 x 8.5) paper to all the trays, and select the set item
J with the scroll key. Enter the value corresponding to the
adjustment target paper feed tray.
adjustment target paper feed tray.
3) Touch [EXECUTE] key.
The adjustment pattern is printed.
4) Check the adjustment pattern to confirm that the items below
are in the range of the standard values.
(Note) Feed paper from all the paper feed trays to confirm.
If the above condition is not satisfied, or if it is set to a desired
condition, execute the simulation 50-1.
If the above condition is not satisfied, or if it is set to a desired
condition, execute the simulation 50-1.
5) Enter the simulation 50-1 mode.
6)
Select the adjustment item with the scroll key, and enter the
adjustment value and touch [OK] key.
adjustment value and touch [OK] key.
When the adjustment value is increased, the void area is
increased. When the adjustment value is decreased, the void
area is decreased. When the adjustment value is changed by
1, the void area is changed by 0.1mm.
(Note)
The adjustment value and the actual void area are related as
follows:
Adjustment value/10 = Actual void area
After execution of the above, perform procedures 1) – 4) to
check that the void area is within the specified range.
Though the lead edge void area adjustment value is proper, if
the lead edge void area is not within the specified range,
change the adjustment value of RRCB-XXX of SIM 50-1.
increased. When the adjustment value is decreased, the void
area is decreased. When the adjustment value is changed by
1, the void area is changed by 0.1mm.
(Note)
The adjustment value and the actual void area are related as
follows:
Adjustment value/10 = Actual void area
After execution of the above, perform procedures 1) – 4) to
check that the void area is within the specified range.
Though the lead edge void area adjustment value is proper, if
the lead edge void area is not within the specified range,
change the adjustment value of RRCB-XXX of SIM 50-1.
Repeat the above procedures until a satisfactory result is
obtained.
obtained.
ADJ 18
Copy image position, image
loss adjustment
loss adjustment
18-A
Copy image position, image loss
adjustment (Document table mode)
adjustment (Document table mode)
This adjustment is required in the following cases:
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When the LSU is replaced or removed.
* When the resist roller section is disassembled.
* When a U2 trouble occurs.
* When the PCU PWB is replaced.
* When the EEPROM on the PCU PWB is replaced.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
* When the scanner (reading) section is disassembled.
* When the scanner (reading) unit is replaced.
* When the LSU is replaced or removed.
* When the resist roller section is disassembled.
* When a U2 trouble occurs.
* When the PCU PWB is replaced.
* When the EEPROM on the PCU PWB is replaced.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
NOTE: Before executing this adjustment, be sure to confirm that
the ADJ 17 Print area (Void area) adjustment (Print engine
section) has been completed normally.
section) has been completed normally.
Content
Standard adjustment value
X
Lead edge void area
3.0
± 1.0mm
Y
Rear edge void area
2.0
± 1.0mm
Z1/Z2
FRONT/REAR void area
2.0
± 2.0mm
X
Y
Z2
2.0±2.0mm
2.0±2.0mm
3.0±1.0mm
2.0±1.0mm
Z1
2.0±2.0mm
2.0±2.0mm
OK
10-key
CLOSE
A:
A㧦 xx
B㧦 xx
C㧦 xx
D㧦 xx
㧧
RRCA
㧧
RRCB-CS12
㧧
RRCB-CS34
㧧
RRCB-LCC
SIMULATION NO.50-01
LEAD EDGE ADJUSTMENT VALUE
xx
0
99
OK
TEST
CLOSE
0
A:
A㧦 xx
B㧦 xx
C㧦 xx
D㧦 xx
㧧
RRCA
㧧
RRCB-CS12
㧧
RRCB-CS34
㧧
RRCB-LCC
SIMULATION NO.50㧙01
LEAD EDGE ADJUSTMENT VALUE
xx
㨇
0 㨪 99 㨉
OK
TEST
0
Display/
Item
Content
Adjustment
range
Default
value
Standard
adjustment
value
DENA
Void are
amount
adjustment
amount
adjustment
Lead edge
void area
adjustment
void area
adjustment
1 – 99
30
3.0
±
1.0mm
DENB
Rear edge
void area
adjustment
void area
adjustment
1 – 99
20
2.0
±
1.0mm
FRONT/
REAR
REAR
FRONT/
REAR void
area
adjustment
REAR void
area
adjustment
1 – 99
20
2.0
±
2.0mm
Display
item
Content
Adjustment
range
Default
value
RRCB-
CS12
CS12
Image lead
edge
position
adjustment
value
edge
position
adjustment
value
Resist
motor ON
timing
adjustment
motor ON
timing
adjustment
Standard
cassette
cassette
1 – 99
50
RRCB-
CS34
CS34
Desk
1 – 99
50
RRCB-
LCC
LCC
LCC
1 – 99
50
RRCB-
MFT
MFT
Manual
feed
feed
1 – 99
50
RRCB-
ADU
ADU
ADU
1 – 99
50
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