Sharp Mx 2300n Service Manual

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 7 2) Open the PWB frame.
3) Enter SIM8-1 mode.
4) Select an output mode to be adjusted with the mode key and
the scroll key.
5) Check the relationship between the pin No. of the connector
CNMON on the MC/DV high voltage PWB and each adjust-
ment mode.
6) Apply a digital multi-meter to the connector CNMON pin on the
MC/DV high voltage PWB corresponding to the adjusted
mode.
7) Press [EXECUTE] key.
The developing bias voltage is outputted for 30sec.
8) Check the monitor voltage with the digital multi-meter.
If the monitor voltage is not in the range of the specified values
shown in the table above, change the adjustment value and
adjust again. If the specified value voltage is not obtained even
though the adjustment value is changed, the following parts
may be defective.
MC/DV high voltage PWB
PCU PWB
Developing unit
OPC drum unit
High voltage circuit electrode
 4-C Transfer voltage adjustment
This adjustment must be executed in the following cases:
* When the TC high voltage power PWB is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1) Enter SIM8-6 mode.
2) Select a mode to be adjusted with the scroll key.
3) Enter an adjustment value (specified value) and press [OK]
key.
By setting the default value (specified value), the specified
voltage is outputted.
When [EXECUTE] key is pressed, the transfer voltage is out-
putted.
CNMON
1
EXECUTE
EXECUTE
A:
!
Axxx
Bxxx
Cxxx
!TC1 LOW SPEED
!
!CL K
!TC1 MIDDLE SPEED CL K

!TC1 LOW SPEED CL CMY
SIMULATION
!NO.08-06
THV SETTING AND OUTPUT
xxx
0255
OK
TEST
EXECUTE
0
DxxxTC1 MIDDLE SPEED_CL CMY
CLOSE
A:
!
Axxx
Bxxx
CxxxTC1 LOW SPEED CL K
TC1 MIDDLE SPEED CL K
TC1 LOW SPEED CL
!CMY
SIMULATION
!NO.08-06
THV SETTING AND OUTPUT
xxx

!0255
OK
TEST
EXECUTE
0
DxxxTC1 MIDDLE SPEED_CL CMY
CLOSE
10-key
or after 30 sec.
ItemDisplayContentSetting 
rangeDefault 
valueActual output 
setting rangeDefault 
value
Actual 
output value
ATC1 LOW SPEED CL KPrimary transfer 
bias reference 
valueCOLORKLow speed0 to 255232–500V to 5000V4500V
BTC1 MIDDLE SPEED CL KMiddle speed0 to 255232–500V to 5000V4500VCTC1 LOW SPEED CL CMYCMYLow speed0 to 255139–500V to 5000V2500VDTC1 MIDDLE SPEED CL CMYMiddle speed0 to 255139–500V to 5000V2500V
ETC1 LOW SPEED BW KBLACKKLow speed0 to 255232–500V to 5000V4500VFTC1 MIDDLE SPEED BW KMiddle speed0 to 255232–500V to 5000V4500VGTC2 PLAIN CL SPXSecondary transfer 
bias reference 
valueCOLORNormal 
paperFront surface51 to 2551002µA to 45µA12.5µA
HTC2 PLAIN CL DPXBack surface51 to 2551002µA to 45µA12.5µAITC2 PLAIN BW SPXBLACKFront surface51 to 255902µA to 45µA10µAJTC2 PLAIN BW DPXBack surface51 to 255902µA to 45µA10µA
KTC2 HEAVY1 CL SPXCOLORHeavy paper51 to 255692µA to 45µA6µALTC2 HEAVY1 BW SPXBLACK51 to 255692µA to 45µA6µAMTC2 OHP CLCOLOROHP51 to 255602µA to 45µA4µA
NTC2 OHP BWBLACK51 to 255602µA to 45µA4µAOTC2 ENVELOPE CLCOLOREnvelope51 to 2551842µA to 45µA30µAPTC2 ENVELOPE BWBLACK51 to 2551842µA to 45µA30µA
QTC2 CLEANINGCleaning process51 to 255792µA to 45µA8µARTC2 CLEAN LOW SPDSecondary transfer 
cleaning bias 
reference valueLow speed print51 to 25572–50V to –1500–200VSTC2 CLEAN MIDDLE SPDMiddle speed print51 to 25572–50V to –1500V–200V
TTC2 CLEAN CLEANINGCleaning51 to 255156–50V to –1500V–800V
1
: Dec. 15 20051 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 8
 
5Image density sensor, image regis-
tration sensor adjustment
There are some assembly variations in the image density sensor
section. Therefore, the absolute detection level differs in each
machine. To correct this, calibration is executed.
This adjustment must be executed in the following cases:
* When the image density sensor is replaced.
* When the image resist sensor is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
The targets of the adjustment are the color image density sensor,
the black image density sensor, and the image registration sensor.
There are following adjustment methods.
* Color image density sensor adjustment (Calibration with the
adjustment jig) SIM44-13
* Black image density sensor and the image registration sensor
adjustment SIM44-2
NOTE: Before executing this adjustment, check to confirm the fol-
lowing items.
* Check to confirm that the color image density sensor, the black
image density sensor, and the image registration sensor are
clean.
* Check to confirm that the image density sensor calibration plate
is clean.
* Check to confirm that the transfer belt is clean and free from
scratches.
 5-A Color image density sensor calibration
1) Open the front cabinet of the main unit, and remove the waste
toner box.
2) Remove the primary transfer unit fixing screw.
3) Turn to the transfer belt tension release cam and release the
primary transfer belt tension.
NOTE: When the transfer belt tension of the primary transfer
unit is released manually, turn on the power again after com-
pletion of the work. (Power OFF-ON) This procedure initializes
the transfer roller to return it to the home position.4) Open the right cover unit (secondary transfer unit section).
5) Open the process front cover, and pull out the primary transfer
belt unit.
6) Install the image density sensor calibration jig to the sensor
housing section.
Engage the projection (c) in the sensor housing groove, and
slide it to the rear frame side.
7) Turn on the power and enter SIM44-13 mode.
8) Close the right cover unit (secondary transfer unit section). 
9) Install the waste toner bottle to the main unit.
10) Close the front cabinet.
11) Press [EXECUTE] key.
Color image sensor calibration is automatically executed.
When the operation is completed, the adjustment result is dis-
played and [EXECUTE] key returns to the normal display.
UN LOCK
CC
EXECUTEEXECUTE
0SIMULATION:wNO.44-13TESTPATCH SEAL ADJUSTMENT
EXECUTE xxx
:
PCS CL DARK
xxx:
xxx
xxx
xxx
xxx:
1/1
CLOSE
0SIMULATION:wNO.44-13TESTPATCH SEAL ADJUSTMENT
EXECUTE
PCS CL CARB OUT:
PCS CL DARK:
PCS CL LED ADJ:
1/1
CLOSE
or when the color sensor
adjustment is completed
PCS CL CARB OUT
PCS CL LED ADJ 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 9 If the adjustment is not completed normally, ERROR is displayed.
In that case, check the following sections for any abnormality. If any
abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.
* Color image density sensor
* PCU PWB
* Image sensor calibration jig (standard reflection sheet dirt,
scratch, discoloration)
NOTE: Store the image sensor calibration jig under low tempera-
ture, low humidity and dark place.
 5-B Color image density sensor, black image
density sensor, image registration sensor
adjustment
1) Enter SIM44-2 mode.
2) Press [EXECUTE] key.
The color image density sensor, the black image density sen-
sor, and the image registration sensor are automatically
adjusted.
After completion of the adjustment, the adjustment result is
displayed and [EXECUTE] key returns to the normal display.
If the adjustment is not completed normally, ERROR is dis-
played.
In that case, check the following sections for any abnormality.
If any abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.
* Color image density sensor
* Black image density sensor
* Image registration sensor
* PCU PWB
* Transfer belt (dirt, scratch)
* Transfer belt cleaner
Display/Item ContentAdjustment 
value rangeDefault 
value
A PCS_CL 
CARB OUTColor image density sensor 
LED current adjustment 
target value1 – 255 108
B PCS_CL 
DARKColor image density sensor 
dark-voltage level 0 – 255 0
C PCS_CL 
LED ADJColor image density sensor 
LED current adjustment 
target value (PCS CL CARB 
OUT) registered LED current 
level1 – 255 21
0SIMULATION NO.44-02TESTPROCON GAIN ADJUSTMENT
EXECUTE
PCS_CL LED ADJxx:PCS_9÷GRNDxx:
PCS_9÷LED ADJxx:PCS_K BELT MAXxx:
PCS_CL DARK
xx:PCS_KBELTMINxx:
PCS_K DARKxx:PCS_KBELTDIFxx:
1/4
CLOSE
Display/Item Content Adjustment value range Default value
PRO CON A PCS_CL LED ADJ Color image density sensor light emitting quantity adjustment value 1 – 255 21
B PCS _K LED ADJ Black image density sensor light emitting quantity adjustment value 1 – 255 21
C PCS_CL DARK Color image sensor dark voltage 0 – 255 0
D PCS_K DARK Black image density sensor dark voltage 0 – 255 0
E PCS_K GRND Belt base detection level when completion of Item B adjustment  0 – 255 0
F PCS_K BELT MAX Belt base detection level (Max.) 0 – 255 0
G PCS_K BELT MIN Belt base detection level (Min.) 0 – 255 0
H PCS_K BELT DIF Belt base detection level difference (Item F – Item G) 0 – 255 0
REGIST I REG_F LED ADJ Image registration sensor light emitting quantity adjustment value F 1 – 255 56
J REG_R LED ADJ Image registration sensor light emitting quantity adjustment value R 1 – 255 56
K REG_F DARK Image registration sensor dark voltage F 0 – 255 0
L REG_R DARK Image registration sensor dark voltage R 0 – 255 0
M REG_F GRND Belt base detection level when completion of Item I adjustment  0 – 255 0
N REG_R GRND Belt base detection level when completion of Item J adjustment 0 – 256 0
O REG_F BELTMAX Belt base detection level (Max.) F 0 – 255 0
P REG_F BELT MIN Belt base detection level (Min.) F 0 – 255 0
Q REG_F BELT DIF Belt base detection level difference (Item O – Item P) 0 – 255 0
R REG_R BELT MAX Belt base detection level (Max.) R 0 – 255 0
S REG_R BELT MIN Belt base detection level (Min.) R 0 – 255 0
T REG_R BELT DIF Belt base detection level difference (Item R – Item S) 0 – 255 0
U REG_F PATCH (K) Patch detection level  F (K) 0 – 255 0
V REG_F PATCH (C) Patch detection level  F (C) 0 – 255 0
W REG_F PATCH (M) Patch detection level  F (M) 0 – 255 0
X REG_F PATCH (Y) Patch detection level  F (Y) 0 – 255 0
Y REG_R PATCH (K) Patch detection level  R (K) 0 – 255 0
Z REG_R PATCH (C) Patch detection level  R (C) 0 – 255 0
AA REG_R PATCH (M) Patch detection level  R (M) 0 – 255 0
AB REG_R PATCH (Y) Patch detection level  R (Y) 0 – 255 0 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 10
 
6Image skew adjustment (LSU unit)
This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When the LSU (writing) unit is removed from the main unit.
* When a color image registration mistake occurs.
* When the unit is installed or when the installing site is changed.
(Required depending on the cases.)
* When there is an uneven density area or a difference in color
balance in the main scanning direction (back and forth).
* When the OPC drum drive unit is replaced.
* When the primary transfer unit is replaced.
* When the color phase is not matched by the color balance
adjustment.
1) Enter SIM61-4 mode.
2) Select the paper feed tray with A3 (11 x 17) paper in it by
changing the value of set item B.
3) Press [EXECUTE] key.
The check pattern is printed out.
4) Check the printed black image for any skew (right angle).
Measure the right angle level by using the six cross patterns
printed in black.
There are following two methods of checking the black image
for any skew (right angle).
Method 1: Measure the length of the diagonal lines from the
cross point of the cross pattern. Check the difference in the
length of the diagonal lines for judgment of good or no good.Method 2: Use the right angle sides of A3 or 11 x 8.5 paper for
judgment of good or no good.
NOTE:
IN the case of Method 2, the right angle of paper to be used
may not be exact. Be sure to check the right angle of paper to
be used in advance.
(Method 1)
a) Measure the length of the diagonal lines from the cross 
point of the outside cross pattern.
b) Calculate the difference between the measured lengths C 
and D of the diagonal lines.
c) Check to insure that the difference between C and D is in 
the following range.
C – D = ± 0.8mm
If the difference between C and D is in the above range, 
there is no need to adjust.
(Method 2)
a) Fit the three cross points of the cross patterns in a row with 
the side of A3 or 11 x 8.5 paper for checking for any skew 
(right angle).
b) Measure the shortest distance between the cross pattern 
on the extended line of the vertical line and the paper side.
If the above distance is 0.5mm or less, there is no need to 
adjust.
If not, execute the following procedures.
5) Open the front cabinet, and remove the waste toner box.
EXECUTEEXECUTE
CLOSE0
A:Axxx
MULTICOUNT
BxPA P E RCS1
SIMULATION
!NO.61-04
LSU POSITION ADJUSTMENT (SELF PRINT)
xxx
1999
OK
TEST
EXECUTE
0SIMULATION NO.61-04
OK
TESTCLOSE
EXECUTE
A:Axxx
MULTICOUNT
BxPA P E RCS1LSU POSITION ADJUSTMENT (SELF PRINT)
2
1999
10-key
or end of print
R
FComparison line
0.5mmorless
Direction A Direction B
Reference line
2
2
R
F
Diagonal line D
Diagonal line C
Direction A
Direction B
R
FComparison line
A3 or 11 x 8.5 paper
The cross patterns in a row
Reference line
0.5 mm or less
: Jan. 15 20062 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 11
6) Loosen the LSU (writing) unit fixing screws (2 pcs.) and shift
the skew adjustment screw in the arrow direction to adjust the
LSU (writing) unit skew.
(When Method 1 is used to check the black image for any
skew (right angle) in procedure 4)
When the lengths of the diagonal line are C > D, shift the
adjustment screw in the direction of Y.
When the lengths of the diagonal line are C < D, shift the
adjustment screw in the direction of X.
(When Method 2 is used to check the black image for any
skew (right angle) in procedure 4)
If the image is skewed in the arrow direction of A, shift the
adjustment screw to X direction. If the image is skewed in the
arrow direction of B, shift the adjustment screw to Y direction.
7) Install the waste toner box, and close the front cabinet.
8) Execute procedures 3) – 4).
(Repeat procedures 5) – 8) until a satisfactory result is
obtained.)
9) If the adjustment result reaches the satisfactory level, tighten
the adjustment screw.
(The black image skew adjustment is completed with the
above.)
10) In the above black image skew adjustment, check the color
image skew pattern printed when completion of the adjust-
ment.
In each Y/M/C color print pattern printed separately in the front
frame direction and in the rear frame direction, note the same
print color pattern and check to confirm that the difference in
the highest density sections is within ± 1 step.
(Compare the front and the rear frame positions of the same-
color print color patterns. All the highest density sections of all
the print color patterns may not be aligned on a line. Compare
only the same-color patterns.)
If the above condition is not satisfied, execute the procedures
below.11) Turn the image skew adjustment screw of the target color to
adjust.
When each adjustment screw is turned, it clicks. Turn it by
5 – 6 clicks and the check pattern is changed by 1 step (1
dot size).
When the image skew pattern on the front frame side is
skewed in the arrow direction of A (to the smaller character)
from the rear frame side, turn the adjustment screw counter-
clockwise. When the image is skewed in the arrow direction of
B (to the larger character), turn the adjustment screw clock-
wise.
12) Print the check pattern.
13) Check the color image skew pattern.
Repeat procedures 11) – 13) until a satisfactory result is obtained.
The image skew adjustment (LSU unit) is executed by changing
the parallelism of the LSU unit scan laser beam for the OPC drum.
 
7OPC drum phase adjustment
This adjustment must be executed in the following cases:
* When the OPC drum is replaced.
* When the OPC drum is removed from the main unit.
* When the OPC drum drive section is disassembled.
* When the OPC drum drive unit is replaced.
* When U2 trouble occurs.
* When the PCU MAIN PWB is replaced.
* When EEPROM on the PCU MAIN PWB is replaced.
2
X Y
R
F *A
*A: Rough adjustment pattern *B
*B: Fine ad
justment pattern *B
Direction A Direction B
Magenta
Cyan
Yellow
CYM
: Jan. 15 20062 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 12
 7-A OPC drum phase adjustment (Auto adjust-
ment)
1) Enter SIM50-22 mode.
2) Press [ALL] key.
(The machine enters the OPC drum phase adjustment mode/
image registration adjustment (auto adjustment) mode, and
both adjustments are executed simultaneously in this mode.)
The OPC drum phase adjustment and the image registration
adjustment can be individually executed by [REGIST] button
and [DRUM POS] button. Since, however, the image registra-
tion adjustment must be executed when the OPC drum phase
adjustment is completed, both adjustment are executed in this
adjustment simultaneously.
3) Press [EXECUTE] key.
The OPC drum phase adjustment and the image registration
adjustment are executed automatically.
* After completion of the adjustment, the drum motor stops and
[EXECUTE] button returns to the normal display and the adjust-
ment result is displayed.
MAIN, SUB: Image regist adjustment value is displayed.
( ) is the difference from the previous adjustment value.
Example: This time 105.0, previous time 103.0: 105.0 (+2)
PHASE: OPC drum phase adjustment value is displayed.
( ) is the previous adjustment value.
Example: This time 90°, previous time 45°:3 (2)
* In case of an error, ERROR is displayed with the details.
 7-B OPC drum phase adjustment (Manual
adjustment)
1) Enter SIM44-31 mode.
EXECUTE
0SIMULATION
!NO.50-22TESTCLOSE
EXECUTE

!NOW EXECUTING …
0SIMULATION
!NO. 50 - 2 2TESTCLOSE
EXECUTE
PRESS [EXECUTE] TO START
ERRORTONNER EMPTY
0SIMULATION NO.50-22TESTAUTO ADJUSTMENT OF REGISTRATIONUDLUM POSITION
EXECUTE C xxx (xx) xxx (xx) xxx (xx) xxx (xx)
M xxx (xx) xxx (xx) xxx (xx)
Y xxx (xx) xxx (xx) xxx (xx)1/1
CLOSE
REGISTDRUM POSALL
Normal end
MAIN R ,MAIN F SUB PHASE
Abnormal end
AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION
AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION
OK
EXECUTEEXECUTE
OK
0
A:Ax
Bx
!PRINT MODESET
!VA L U E

!COLOR
SIMULATION
!NO. 44 - 31
DRUM POSITION SETTING
x

!13
OK
TEST
EXECUTE
CLOSE
CxPAPERSELECT
0
A:
!Ax
Bx
!PRINT MODESET
!VA L U E

!COLOR
SIMULATION
!NO. 44 - 31
DRUM POSITION SETTING
x
13/
TESTCLOSE
CxPAPERSELECT
EXECUTEOK
0
A:Ax
BxPRINT MODESET
!VA L U E
COLOR
SIMULATION
!NO. 44 - 31
DRUM POSITION SETTING
x
13
OK
TEST
EXECUTE
CLOSE
CxPAPERSELECT
EXECUTEEXECUTE
0
A:
!Ax
BxPRINT MODE45N
COLOR
SIMULATION
!NO. 44 - 31
DRUM POSITION SETTING
x

!13
TEST
EXECUTE
CLOSE
CxPAPERSELECT
OK
0
A:
!A1
B2PRINT MODE45COLOR
SIMULATION
!NO. 44 - 31
DRUM POSITION SETTING
1
13
OK
TEST
EXECUTE
CLOSE
C2
10-key
or end of print
10-key
or end of print 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 13 2) Enter 1 with 10-key in the PRINT MODE of set item A, and
press [OK] key.
3) Select the paper feed stage with A3 (or 11 x 17) in it with
PAPER SELECT of set item C, and press [OK] key.
4) Press [EXECUTE] key.
The adjustment patterns (8 pages) are printed.
Each identification number (1 – 8) is printed on each printed
page of 8 adjustment patterns.
5) Check the deflection in 94mm pitch cycle of each C/M/Y print
pattern. Select a print pattern of the smallest deflection for
each color of C/M/Y, and use the pattern identification number
as the adjustment value, and enter it to set item B. Press [OK]
key.
NOTE: If there is a peculiar deflection other than the drum cycle
(94mm pitch), check the following conditions.
* OPC drum drive section
* Transfer belt drive section
* Paper feed drive section
* Each motor speed set value (Set value of SIM48-6)
 
8Print engine image magnification
ratio adjustment (BK) (Main scan-
ning direction) (Print engine section)
 8-A Print engine image magnification ratio
adjustment (BK) (Main scanning direction)
(Print engine section) (Manual adjustment)
This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1) Enter SIM50-10 mode.
2) Set A4 (11 x 8.5) paper in the paper feed tray.
3) Select the paper feed tray set in procedure 2) with the scroll
key.
4) Press [EXECUTE] key.
The check pattern is printed.
5) Check that the inside dimension of the printed half tone is 240
± 0.5mm.
If the above condition is not satisfied, execute the procedures
below.
8
94mm 94mm 94mm 94mm
EXECUTE
EXECUTE
0
A:Axxx
BxxBK-MAG
MTF
SIMULATIONNO.50-10
PAPER CENTER OFFSET SETUP
xxx
64140
OK
TEST
EXECUTE
CLOSE
CxxCS1
DxxCS2
0
A:Axxx
BxxBK-MAG
MTF
SIMULATION NO.50-10
PAPER CENTER OFFSET SETUP
xxx
64140
!
OK
TEST
EXECUTE
CLOSE
CxxCS1
DxxCS2
end of print 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 14 6) Change the set value of set item A.
When the set value is changed by 1, the dimension is changed
by 0.1mm.
When the set value is increased, the BK image magnification
ratio in the main scanning direction is increased. When the set
value is decreased, the BK image magnification ratio in the
main scanning direction is decreased.
Repeat procedures 2) – 6) until a satisfactory result is obtained.
 
9Image off-center adjustment (Print
engine section)
This adjustment must be executed in the following cases:
* When the LSU is replaced or removed.
* When [ADJ8] print engine image magnification ratio (BK) (main
scanning direction) is performed.
* When a paper tray is replaced.
* When the paper tray section is disassembled.
* When the manual feed tray is replaced.
* When the manual 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 replaced.
* When the large capacity paper feed tray section is disassembled.
* When the regist roller section is disassembled.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
(Caution)
* Before execution of this adjustment, check the following item.
* Check to insure that the print engine image magnification ratio
adjustment (BK) (main scanning direction) has been properly
adjusted.
1) Enter SIM50-10 mode.
2) Select set item J with the scroll key and enter the value corre-
sponding to the paper feed tray to be adjusted.3) Set A4 (11 x 8.5) paper in the paper feed tray selected in pro-
cedure 2).
4) Press [EXECUTE] key.
The adjustment pattern is printed.
5) Check the adjustment pattern image position.
Measure the dimension of the void area in the front and the
rear frame direction of the adjustment pattern, and check that
all the following conditions are satisfied.
RV: REAR VOID AREA
FV: FRONT VOID AREA
RV + FV ≤ 4.0mm
RV = 2.0 ± 2.0mm
FV = 2.0 ± 2.0mm
If the above conditions are not satisfied, execute the proce-
dures below.
Display/Item ContentSet 
rangeDefault 
value
A BK-MAG Main scan print 
magnification ratio BK60 – 140 100
B MFT Print off-center adjustment 
value (Manual feed tray)1 – 99 50
EXECUTEEXECUTE
0
A:A : xxx
B: xx; BK- MAG
;MTF
SIMULATION NO.50-10
PAPER CENTER OFFSET SET UP
xxx
[ 60~140 ]
OK
TEST
EXECUTE
CLOSE
C : xx ; CS1
D : xx ; CS2
0
A:A : xxx
B: xx; BK- MAG
;MTF
SIMULATION NO.50-10
PAPER CENTER OFFSET SET UP
xxx
[ 60~140 ]
OK
TEST
EXECUTE
CLOSE
C : xx ; CS1
D : xx ; CS2
End of print
C CS1 Print off-center adjustment 
value (Paper feed tray 1)1 – 99 50
D CS2 Print off-center adjustment 
value (Paper feed tray 2)1 – 99 50
E CS3 Print off-center adjustment 
value (Paper feed tray 3)1 – 99 50
F CS4 Print off-center adjustment 
value (Paper feed tray 4)1 – 99 50
G LCC Print off-center adjustment 
value (LCC)1 – 99 50
H ADU Print off-center adjustment 
value (ADU)
Note: Before execution of 
this adjustment, check to 
insure that the adjustment 
items A – G have been 
properly adjusted. If not, 
this adjustment cannot be 
made properly.1 – 99 50
I MULTI COUNT Print quantity 1 – 999 1
J PAPER MFT Paper feed 
tray selectManual paper 
feed tray1 – 6 1 2 (CS 1)
CS 1 Paper feed 
tray 12
CS 2 Paper feed 
tray 23
CS 3 Paper feed 
tray 34
CS 4 Paper feed 
tray 45
LCC LCC 6
K DUPLEX YES Duplex 
print selectSelected 0 – 1 0 1 (NO) Display/Item ContentSet 
rangeDefault 
value 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 15 6) Select the paper feed mode adjustment item (B – H) to be
adjusted with the scroll key.
7) Change the adjustment value.
Enter the adjustment value and press [OK] or [EXECUTE] key.
When [EXECUTE] key is pressed, the adjustment pattern is
printed.
When the adjustment value is increased, the adjustment pat-
tern is shifted to the front frame side. When it is decreased, the
adjustment pattern is shifted to the rear frame side.
When the set value is changed by 1, the shift distance is
changed by about 0.1mm.
Repeat procedures 3) – 7) until the conditions of procedure 5)
are satisfied.
In case a satisfactory result cannot be obtained by repeating
the above procedures, perform the following procedure.
8) Loosen the paper feed tray off-center adjustment screws (2
pcs.) at the center section of the lift plate of the paper feed tray,
and change the gear unit position in the front/back frame direc-
tion. Repeat the adjustment procedures from 4).
 
10Image registration adjustment (Print
engine section)
This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When the LSU (writing) unit is removed from the main unit.
* When the color image registration mistake in the main scanning
direction occurs.
* When the color image registration mistake in the sub scanning
direction occurs.
* When the unit is installed or when the installing place is changed.
* When maintenance is executed. (Replacement of the OPC drum,
the OPC cartridge, the transfer unit, the transfer belt, etc.)
* When [ADJ8] print engine image magnification ratio (BK) (main
scanning direction) is performed.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
■Note before adjustment
(Before execution of this adjustment, all the following adjustments
must have been completed.)
* Image skew adjustment (LSU (writing) unit)* Print engine image magnification ratio adjustment (BK) (Main
scanning direction) (Print engine section)
 10-A Image registration adjustment (Main scan-
ning direction, sub scanning direction)
(Auto adjustment)
In this adjustment, the image registration adjustment in the main
scanning direction and that in the sub scanning direction are exe-
cuted simultaneously and automatically.
1) Enter SIM50-22 mode.
2) Press [REGIST] key to select the image registration adjust-
ment auto adjustment mode.
3) Press [EXECUTE] key.
[EXECUTE] key is highlighted and the image registration auto
adjustment is started. After completion of the adjustment,
[EXECUTE] key returns to the normal display and the adjust-
ment result is displayed.
It takes about 40 sec to complete the adjustment.
Display/Item ContentAdjustment 
value rangeDefault 
value
REGIST MAIN 
FC Image registration 
adjustment value (Main 
scanning direction) 
(Cyan) (F side)1.0 – 199.0 100
M Image registration 
adjustment value (Main 
scanning direction) 
(Magenta) (F side)1.0 – 199.0 100
Y Image registration 
adjustment value (Main 
scanning direction) 
(Yellow) (F side)1.0 – 199.0 100
EXECUTE
0SIMULATION
!NO.50-22TESTCLOSE
EXECUTE

!NOW EXECUTING…
0SIMULATION
!NO. 50 - 2 2TESTCLOSE
EXECUTE
PRESS [EXECUTE] TO START
ERRORTONNER EMPTY
0SI MULATI ON
!NO.50-22TEST
!
!
EXECUTE1/1
CLOSE
REGISTDRUM POSALL C xxx (x) xxx xxx (x) xxx (x)
M xxx (x) xxx xxx (x)
Y xxx (x)
!
!
!
!xxx (x) xxx (x)(x)
(x) MAIN R ,MAIN F SUB PHASE
Normal end
AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION
AUTO ADJUSTMENT OF REGISTRATION & DLUM POSITION
Abnormal end 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 16 MAIN, SUB: The entered value after adjustment is displayed.
( ): Difference from the previous value.
Example: This time 105, previous time 103: 105 (+2)
* In case of an error, ERROR is displayed with the details.
To check the auto adjustment result, use the manual image
registration adjustment mode below.
* Image registration adjustment (Main scanning direction) (Manual
adjustment) (SIM50-20)
* Image registration adjustment (Sub scanning direction) (Manual
adjustment) (SIM50-21)
 10-B Image registration adjustment (Main scan-
ning direction) (Manual adjustment)
1) Enter SIM50-20 mode.
2) Select the paper feed tray with A3 (11 x 17) paper in it by
changing the value of set item H.
3) Press [EXECUTE] key.
The image registration adjustment pattern in the main scan-
ning direction is printed.
A: Rough adjustment pattern
B: Fine adjustment pattern
C: Adjustment range (0 ± 1)
REGIST MAIN 
RC Image registration 
adjustment value (Main 
scanning direction) 
(Cyan) (R side)1.0 – 199.0 100
M Image registration 
adjustment value (Main 
scanning direction) 
(Magenta) (R side)1.0 – 199.0 100
Y Image registration 
adjustment value (Main 
scanning direction) 
(Yellow) (R side)1.0 – 199.0 100
SUB C Image registration 
adjustment value (Sub 
scanning direction) 
(Cyan)1.0 – 199.0 100
M Image registration 
adjustment value (Sub 
scanning direction) 
(Magenta)1.0 – 199.0 100
Y Image registration 
adjustment value (Sub 
scanning direction) 
(Yellow)1.0 – 199.0 100 Display/Item ContentAdjustment 
value rangeDefault 
value
EXECUTE
0
A:
!Axxx
BxxxCYAN(FRONT)
CYAN(REAR)
SIMULATION
!NO.50-20
REGISTRATION
!ADJUSTMENT : FRONT-REAR DIRECTION
xxx

!1199
OK
TEST
EXECUTE
CLOSE
CxxxMAGENTA(FRONT)
DxxxMAGENTA(REAR)
0
A:
!Axxx
BxxxCYAN(FRONT)
CYAN(REAR)
SIMULATION
!NO.50-20
REGISTRATION
!ADJUSTMENT : FRONT-REAR DIRECTION
xxx
1199
!
OK
TEST
EXECUTE
CLOSE
CxxxMAGENTA(FRONT)
DxxxMAGENTA(REAR)
EXECUTE
10-key
End of print

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