Sharp Mx 2300n Service Manual

							MX-2300/2700 N/G  EXTERNAL VIEW AND INTERNAL STRUCTURE  5 – 14
N. Fuses/Thermostats
34 SCAN IN PWB Rectifies the waveform of scanner image data. 
DOCC PWB Recognizes the document control pattern. Option
35 BOOT ROM PWB Stores the program to boot the printer controller.
36 PROGRAM ROM PWB Stores the program.
37 SCN Flash ROM PWB Stores the scanner control program.
38 HVR PWB Divides the primary transfer electrode for each color to improve the transfer capability.
No. Signal name Name Specifications Section
1 HLTS1 Thermostat Prevents against overheating of the fusing roller. Fusing unit
2 HLTS2 Thermostat Prevents against overheating of the fusing roller. Fusing unit
3 HLTS3 Thermostat Prevents against overheating of the fusing roller. Fusing unit
4 F201 Fuse T6.3AH250V DC power PWB
5 F202 Fuse  T6.3AH250V DC power PWB
6 F203 Fuse T6.3AH250V DC power PWB
7 F204 Fuse T6.3AH250V DC power PWB
8 F205 Fuse  T6.3AH250V DC power PWB
9 F1 Fuse 20A 125V AC power PWB
10 F2 Fuse 20A 125V AC power PWB
11 F3 Fuse  T2AH250V AC power PWB
12 F4 Fuse T2AH250V AC power PWB
13 F1 Fuse 200mA 250V LCD INV PWB
14 F101 Fuse 125V 12A DC power PWB
15 F102 Fuse T1AH250V DC power PWB
16 F103 Fuse  T8AH250V DC power PWB
17 F301 Fuse T5AH250V DC power PWB
18 F1 Fuse 1.25A250V CL invertor PWB No. Name Function/Operation Note
3
13
9
10 4
5
6
7
81
2
1211
17
1514
16
18 
						

							MX-2300/2700 N/G  EXTERNAL VIEW AND INTERNAL STRUCTURE  5 – 15
O. Adjustment volumes
P. G a t e
Signal name Function/ Operation Section Note
VR201 +12V output adjustment DC power PWB
VR203 +24V output adjustment DC power PWB
VR204 +5VN output adjustment DC power PWB
VR205 +3.3V output adjustment DC power PWB
VR402 +5VO, +5VL output adjustment DC power PWB
No. Name Function/ Operation Note
1 ADU reverse gate Switches the paper route: discharged to the inner tray or 
discharged to the right tray.
2 ADU gate lower Switches the transport route by switchback when paper is 
transported to the duplex (ADU) section.
VR201VR203
VR205
VR402
VR204
1
2 
						

							MX-2300/2700 N/G  EXTERNAL VIEW AND INTERNAL STRUCTURE  5 – 16
Q. Rollers
No. Name Function/ Operation Note
1 Paper feed roller (Manual paper feed tray) Feeds paper to the paper transport section. 
2 Separation roller (Manual paper feed tray) Separate paper to prevent against double feed. 
3 Paper pickup roller (Manual paper feed tray) Feeds paper to the paper feed roller. 
4 Paper feed roller (No. 1 paper feed tray) Feeds paper to the paper transport section. 
5 Paper pickup roller (No. 1 paper feed tray) Feeds paper to the paper feed roller. 
6 Separation roller (No. 1 paper feed tray) Separates paper to prevent against double feed.
7 Paper feed roller (No. 2 paper feed tray) Feeds paper to the paper transport section. 
8 Paper pickup roller (No. 2 paper feed tray) Feeds paper to the paper feed roller. 
9 Separation roller (No. 2 paper feed tray) Separates paper to prevent against double feed. 
10 Resist roller (Drive) Transports paper to the transfer section. Controls the paper transport 
timing to adjust relative relations between images and paper. 
11 Resist roller (Idle) Applies a pressure to paper and the resist roller to give paper the 
transport power of the transport roller.
12 Transport roller 1 (Idle) Applies a pressure to paper and the resist roller to give paper the 
transport power of the transport roller.
13 Transport roller 1 (Drive) Transports paper from No. 3 and No. 4 paper feed tray to the 
transport roller 4. 
14 Transport roller 3 (Idle) Reduces friction between paper and the paper guide. 
15 Transport roller 4 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller.
16 Transport roller 4 (Drive) Transports paper from the transport roller 1 and paper feed roller (No. 
2 paper feed tray) to the transport roller 7. 
17 Transport roller 5 (Drive) Transports paper from the paper feed tray 1 to the transport roller 7. 
18 Transport roller 5 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller.
19 Transport roller 6 (Idle) Reduces friction between paper and the paper guide.
20 Transport roller 7 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller. 
35 34 32 33
36
37
24
25
27
26
38
28 39
29
3
2
6 20
19
18 17
15
9 14
12
13 16 21
22
4 23
5
31
301 10 11
7 8 
						

							MX-2300/2700 N/G  EXTERNAL VIEW AND INTERNAL STRUCTURE  5 – 17
21 Transport roller 7 (Drive) Transports paper from the paper feed tray 1, 2, 3, and 4 to the 
transport roller 8. 
22 Transport roller 8 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller.
23 Transport roller 8 (Drive) Transports paper to the resist roller. 
24 Transport roller 9 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller.
25 Transport roller 9 (Drive) Transports paper from the fusing roller to the transport roller 13. 
26 Transport roller 10 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller.
27 Transport roller 10 (Drive) Transports paper from the transport roller 13 to the transport roller 11. 
28 Transport roller 11 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller.
29 Transport roller 11 (Drive) Transports paper from the transport roller 10 to the transport roller 12. 
30 Transport roller 12 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller.
31 Transport roller 12 (Drive) Transports paper from the transport roller 11 to the transport roller 8. / 
Transports the paper from the manual paper feed tray to the transport 
roller 8.
32 Transport roller 13 (Drive) Transports paper from the transport roller 9 to the transport roller 1. / 
Transport paper to the duplex (ADU) section.
33 Transport roller 13 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller.
34 Paper exit roller 1 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller.
35 Paper exit roller 1 (Drive) Discharges paper. Transports paper to the right paper exit tray. 
Transport paper to the duplex (ADU) section. 
36 Paper exit roller 2 (Idle) Applies a pressure to paper and the transport roller to give paper the 
transport power of the transport roller.
37 Paper exit roller 2 (Drive) Discharges paper. 
38 Fusing roller (Heating) Heats toner on paper, and fuses it onto paper. 
39 Fusing roller (Pressing) Applies a pressure to the fusing roller (heating).  No. Name Function/ Operation Note 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 1 MX2700N
Service Manual [6] ADJUSTMENTS
1. General
Each adjustment item in the adjustment item list is associated with
a specific Job number. Perform the adjustment procedures in the
sequence of Job numbers from the smallest to the greatest.
However, there is no need to perform all the adjustment items. Per-
form only the necessary adjustments according to the need.Unnecessary adjustments can be omitted. Even in this case, how-
ever, the sequence from the smallest to the greatest Job number
must be observed.
If the above precaution should be neglected, the adjustment would
not complete normally or trouble may occur.
2. Adjustment item list
Job No. Adjustment item list Simulation
ADJ 1 Developing doctor gap adjustment
ADJ 2 Developing roller main pole position adjustment
ADJ 3 Toner density reference control level setting
ADJ 4 High voltage adjustments ADJ 4A Main charger grid voltage adjustment 8-2
ADJ 4B Developing bias voltage adjustment 8-1
ADJ 4C Transfer voltage adjustment 8-6
ADJ 5 Image density sensor, image registration sensor 
adjustmentADJ 5A Color image density sensor calibration 44-13
ADJ 5B Color image density sensor, black image density sensor, image 
registration sensor adjustment44-2
ADJ 6 Image skew adjustment (LSU unit)64-1/61-4
ADJ 7 OPC drum phase adjustment ADJ 7A OPC drum phase adjustment (Auto adjustment) 50-22
ADJ 7B OPC drum phase adjustment (Manual adjustment) 44-31
ADJ 8 Print engine image magnification ratio adjustment 
(BK) (Main scanning direction) (Print engine section)ADJ 8A Print engine image magnification ratio adjustment (BK) (Main 
scanning direction) (Print engine section) (Manual adjustment)50-10
ADJ 9 Image off-center adjustment (Print engine section)50-10
ADJ 10 Image registration adjustment (Print engine section) ADJ 10A Image registration adjustment (Main scanning direction, sub 
scanning direction) (Auto adjustment)50-22
ADJ 10B Image registration adjustment (Main scanning direction) (Manual 
adjustment)50-20
ADJ 10C Image registration adjustment (Sub scanning direction) (Manual 
adjustment)50-21
ADJ 11 Scan image distortion adjustment ADJ 11A Scanner (reading) unit parallelism adjustment
ADJ 11B Scan image (sub scanning direction) distortion adjustment
ADJ 11C Scan image (main scanning direction) distortion adjustment
ADJ 11D Scan image distortion adjustment (Whole scanner)
ADJ 12 Scan image focus adjustment (CCD unit position adjustment)
ADJ 13 Scan image skew adjustment (RSPF) (Refer to MX-RPX1 SM.)
ADJ 14 Scan image magnification ratio adjustment 
(Document table mode)ADJ 14A Scan image magnification ratio adjustment (Main scanning 
direction) (Document table mode)48-1
ADJ 14B Scan image magnification ratio adjustment (Sub scanning direction) 
(Document table mode)48-1
ADJ 15 Scan image magnification ratio adjustment (RADF 
mode) (Refer to the MX-RPX1 SM.)ADJ 15A Scan image magnification ratio adjustment (Main scanning 
direction) (RADF mode) (Refer to the MX-RPX1 SM.)48-1
ADJ 15B Scan image magnification ratio adjustment (Sub scanning direction) 
(RADF mode) (Refer to the MX-RPX1 SM.)48-1
ADJ 16 Scan image off-center adjustment ADJ 16A Scan image off-center (Document table mode) 50-12
ADJ 16B Scan image off-center (RSPF mode) (Refer to the MX-RPX1 SM.) 50-12
ADJ 17 Print area (Void area) adjustment (Print engine section)50-10/50-1
ADJ 18 Copy image position, image loss adjustment ADJ 18A Copy image position, image loss adjustment (Document table 
mode)50-1 (50-2)
ADJ 18B Copy image position, image loss adjustment (RSPF mode) (Refer to 
the MX-RPX1 SM.)50-6 (50-7)
ADJ 19 Print lead edge image position adjustment (Printer mode) (Print engine section) 50-5
ADJ 20 Copy color balance/density adjustment ADJ 20A CCD gamma adjustment (CCD calibration) (Normal document copy 
mode)63-3 (63-5)
ADJ 20B Copy color balance adjustment (Auto adjustment) 46-24
ADJ 20C Copy color balance adjustment (Manual adjustment) 46-21
ADJ 20D Copy density adjustment (Each color copy mode) (Whole 
adjustment) (Normally unnecessary to adjust)46-1
ADJ 20E Copy density adjustment (each monochrome copy mode) (Whole 
adjustment) (Normally unnecessary to adjust)46-2
ADJ 20F Copy color balance adjustment (Color balance adjustment at each 
density level in each color copy mode) (Normally not required)46-10
ADJ 20G Monochrome copy density adjustment (Density adjustment at each 
density level in each monochrome copy mode) (Normally not 
required)46-16
ADJ 20H Gamma/density adjustment in the text image edge section 
(Normally not required)46-27 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 2
3. Details of adjustment
 
1Developing doctor gap adjustment
This adjustment must be executed in the following cases:
* When the developing unit is disassembled. 
* When the print image density is low.
* When there is a blur on the print image. 
* When there is unevenness in the print image density.
* There is abnormally much toner dispersion.
1) Remove the developing unit from the main unit, and remove
the developing unit upper cover and the developing doctor
cover.2) Loosen the developing doctor fixing screw.
3) Insert a thickness gauge of 0.40mm between 40mm – 70mm
from the edge of the developing doctor.
ADJ 20 Copy color balance/density adjustment ADJ 20I Copy color balance adjustment (Single color copy mode) (Normally 
not required)46-25
ADJ 20J Auto color balance adjustment by the user (Copy color balance auto 
adjustment enable setting and adjustment)26-53
ADJ 20K Background process condition setting in the color auto copy mode 46-33
ADJ 20L Color document identification level (ACS operation) setting 46-33
ADJ 21 Printer color balance/density adjustment ADJ 21A Printer color balance adjustment (Auto adjustment) 67-24
ADJ 21B Printer color balance adjustment (Manual adjustment) 67-25
ADJ 21C Auto color balance adjustment by the user (Copy color balance auto 
adjustment ENABLE setting and adjustment)26-54
ADJ 22 Fusing paper guide position adjustment
ADJ 23 Document size sensor adjustment ADJ 23A Document size sensor detection point adjustment 41-2
ADJ 23B Document size sensor sensitivity adjustment 41-2
ADJ 24 Manual paper feed tray paper size (width) sensor adjustment40-2
ADJ 25 RSPF tray paper size (width) sensor adjustment  (Refer to the MX-RPX1 SM.) 53-7
ADJ 26 Touch panel coordinate setting65-1
ADJ 27 Image loss, void area, image off-center, image 
magnification ratio auto adjustment with SIM50-28ADJ 27A Print image main scanning direction image magnification ratio 
automatic adjustment50-28
ADJ 27B Image off-center automatic adjustment 50-28
ADJ 27C Copy lead edge image reference position adjustment, image off-
center, sub scanning direction image magnification ratio automatic 
adjustment50-28
ADJ 27D SPF mode image off-center, image lead edge position, sub 
scanning direction image magnification ratio automatic adjustment50-28 Job No. Adjustment item list Simulation
1
2
2
40mm70mm40mm 70mm
: Jan. 15 20062 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 3
4) Push the developing doctor in the arrow direction, and tighten
the fixing screw of the developing doctor. (Perform the similar
procedure for the front frame and the rear frame.)
5) Check that the doctor gaps at two positions in 40mm – 70mm
from the both sides of the developing doctor are in the range of
0.40 ± 0.05mm.
* When inserting a thickness gauge, be careful not to scratch the
developing doctor and the developing roller.
 
2Developing roller main pole position
adjustment
This adjustment must be executed in the following cases:
* When the developing unit is disassembled.
* When the print image density is low.
* When there is a blur on the print image.
* When there is unevenness in the print image density.
* There is abnormally much toner dispersion.
1) Remove the developing doctor cover, and place the develop-
ing unit on a flat surface.
2) Attach a thread to a needle or a pin.
3) Hold the thread and bring the needle near the developing
roller. (Do not use a paper clip because it will not provide a cor-
rect position.)
4) Mark the developing roller surface on the extension line of the
needle with the needle at 2 – 3mm from the developing roller
surface. (Never touch the needle tip with the developing roller.)5) Measure the distance between the marking position and posi-
tion A of the developing unit frame, and check that it is 37.8 ±
0.5mm.
If the distance is not within the above range, adjust the devel-
oping roller main pole position in the following procedures.
6) Remove the developing unit front cover, loosen the fixing
screw of the developing roller main pole adjustment plate, and
move the adjustment plate in the arrow direction to adjust.
Repeat procedures 3) – 6) until the developing roller main pole
position comes to the specified range.
7) After completion of the adjustment of the developing roller
main pole position, fix the developing roller main pole adjust-
ment plate with the fixing screw.
 
3Toner density reference control level
setting
This adjustment must be executed in the following cases:
* When developer is replaced.
NOTE: Be sure to execute this adjustment only when developer is
replaced. Never execute it in the other cases.
2
40mm70mm40mm 70mm
2:*3mm
A
37.8+0.5mm37.8+0.5mm
: Jan. 15 20062 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 4 1) With the front cabinet open, enter SIM25-2.
2) Close the front cabinet.
3) Select a developing unit to be adjusted.
4) When [EXECUTE] key it pressed, it is highlighted. The devel-
oping roller rotates, and the toner sensor detects toner density,
and the output value is displayed.
The above operation is executed for 3 minutes, and the aver-
age value of the toner density sensor detection level is set
(saved) as the reference toner density control value.
When the reference toner density control adjustment operation
is completed, [EXECUTE] key display return, to normal from
highlight. This makes you know whether the adjustment opera-
tion is completed or not.
The above operation is executed each of the lower speed
mode and the middle speed mode, and the reference toner
density control value is set for each of them.
NOTE: If the operation is interrupted within 3 minutes, the 
adjustment result is not reflected (enabled).
When [EXECUTE] key is pressed during rotation, the opera-
tion is stopped and [EXECUTE] key returns to the normal dis-
play.
If [EE-EU], [EE-EL], or [EE-EG] is displayed, setting of the ref-
erence toner density control value is not completed normally.5) Use SIM24-5 to clear the developer counter.
6) Use SIM44-27 to clear the half-tone correction data.
NOTE:
a) When replacing developer, always replace all the three
colors of Yellow, Magenta, and Cyan.
If only one color is replaced, color balance may be
adversely affected. Black developer can be replaced indi-
vidually.
b) After replacement of developer or the photoconductor, be
sure to execute SIM44-27 to clear the half-tone correction
data.
If the above procedure is neglected, the half-tone correc-
tion may not be performed correctly.
 
4High voltage adjustments
 4-A Main charger grid voltage adjustment
This adjustment must be executed in the following cases:
* When the MC/DV 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 SIM8-2 mode.
2) Select an output mode to be adjusted with the mode key and
the scroll key. 
3) Enter the adjustment value (specified value) of the middle
speed mode and press [OK] key.
EXECUTE
M
K
0SIMULATION NO.25-02TESTAUTOMATIC DEVELOPER ADJUSTMENT
EXECUTE
TCD_Kxx:
TCV_Kxx:
TCD_C
xx:
TCV_Cxx:
TCD_M
xx:
TCV_Mxx:
TCD_Yxx:
TCV_Yxx:
1/1KCMY
CLOSE
EXECUTE
0SIMULATION NO.25-02TESTAUTOMATIC DEVELOPER ADJUSTMENT
EXECUTE
AT DEVE ADJ_L_Kxxx:AT DEVE VO_L_Kxxx:
AT DEVE ADJ_L_C
xxx:
AT DE V E V O_L _ Cxxx:
AT DEVE ADJ_L_Mxxx:
AT DE V E V O_L _ Mxxx:
AT DEVE ADJ_L_Yxxx:xxx:1/2
CLOSE
AT DE V E V O_L _ YKCMY
0SIMULATION NO.25-02TESTAUTOMATIC DEVELOPER ADJUSTMENT
EXECUTE
AT DEVE ADJ_L_Kxxx: AT DEVE VO_L_Kxxx:
AT DEVE ADJ_L_Cxxx: AT DEVE VO_L_Cxxx:
AT DEVE ADJ_L_Mxxx: AT DEVE VO_L_Mxxx:
AT DEVE ADJ_L_Yxxx:xxx:1/2
CLOSE
AT DEVE VO_L_YYKCM
0SIMULATION NO.25-02TESTAUTOMATIC DEVELOPER ADJUSTMENT
TCD_KEE-EL:
TCV_K:
TCD_C
xx:
TCV_C:
TCD_M
EE-EL:
TCV_M:
TCD_Yxx:
TCV_Y:
1/1KCMY
CLOSE
EXECUTE
or process interrupt
Adjustment completed
Abnormal
end
Error 
displayError name Detail of error
EE-EL EL abnormality Sensor output level, 1.5V or below; control 
voltage, 8.0V or above
EE-EU EU abnormality Sensor output level, 3.45V or above; 
control voltage, 2.0V or below
EE-EC EC abnormality Sensor output level, other than 2.5V ± 0.2V
EXECUTE
EXECUTE
0
A:A : xxx
B : xxx
C : xxx;MIDDLESPEEDGB_K
;MIDDLESPEEDGB_C
;MIDDLESPEEDGB_M
SIMULATION
MHV/GRID SETTING AND OUTPUT
xxx
230850
OK
TESTCLOSE
EXECUTE
D : xxx; MIDDLE SPEED GB_Y
LOWMIDDLE
0
A:A : xxx
B:xxxC:xxx
; MIDDLE SPEED GB_K
; MIDDLE SPEED GB_C
; MIDDLE SPEED GB_M
SIMULATION NO.08-02
MHV/GRID SETTING AND OUTPUT
xxx
230850
OK
TESTCLOSE
EXECUTE
D:xxx;MIDDLESPEEDGB_Y
LOWMIDDLE
10-key
or after 30 sec.
NO.08-02 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 5 Remark: By setting the default value, the specified voltage is 
normally outputted.
The adjustment value of each color mode is specified on the label
attached to the MC/DV high voltage power PWB. Enter that value.
GBK:XXX GBC:XXX GBM:XXX GBY:XXX
When the adjustment value (specified value) of the middle speed
mode is set, the adjustment values of the other modes are auto-
matically set according to the middle speed mode setting in a cer-
tain relationship.
To adjust all the modes individually, first adjust the middle speed
mode, and then adjust the other mode.
If the middle speed mode is adjusted after adjustment of all the
modes individually, the adjustment values of the other modes are
automatically changed. Use care for that.
Therefore, unless there may be an abnormality in the output volt-
age, there is no need to check the output value.
If it must be checked that the normal voltage is outputted or if an
adjustment is required by referring to the output voltage, follow the
procedures below.
1) Remove the main unit rear cover.2) Open the PWB holder.
3) Enter SIM8-2 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 main charger grid voltage is outputted for 30sec.
If this procedure is executed for a long time, the OPC drum
and the developing roller may be adversely affected. Use this
procedure as short as possible.
If possible, it is recommendable to use an unnecessary devel-
oping unit and an unnecessary OPC drum for this adjustment.
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-B Developing bias voltage adjustment
This adjustment must be executed in the following cases:
* When MC/DV high voltage power PWB is replaced.
* When U2 trouble occurs.
* When PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
Item ModeAdjustment value Monitor (MC/DV  high voltage PWB)
Actual 
voltage Adjustment 
rangeDefault 
valueMonitor voltage 
(Specified value)ConnectorPin 
No.
MIDDLE A MIDDLE SPEED GB_K K Main charger grid voltage 
(Middle speed mode)230 – 850 615 53.6 ± 1.61V CNMON 8 –615V
B MIDDLE SPEED GB_C C Main charger grid voltage 
(Middle speed mode)230 – 850 615 53.6 ± 1.61V CNMON 6 –615V
C MIDDLE SPEED GB_M M Main charger grid voltage 
(Middle speed mode)230 – 850 615 53.6 ± 1.61V CNMON 4 –615V
D MIDDLE SPEED GB_Y Y Main charger grid voltage 
(Middle speed mode)230 – 850 615 53.6 ± 1.61V CNMON 2 –615V
LOW A LOW SPEED GB_K K Main charger grid voltage 
(Low speed mode)230 – 850 605 52.7 ± 1.58V CNMON 8 –605V
B LOW SPEED GB_C C Main charger grid voltage 
(Low speed mode)230 – 850 605 52.7 ± 1.58V CNMON 6 –605V
C LOW SPEED GB_M M Main charger grid voltage 
(Low speed mode)230 – 850 605 52.7 ± 1.58V CNMON 4 –605V
D LOW SPEED GB_Y Y Main charger grid voltage 
(Low speed mode)230 – 850 605 52.7 ± 1.58V CNMON 2 –605V
1
2 
						

							MX-2300/2700 N/G  ADJUSTMENTS  6 – 6 1) Enter SIM8-1 mode. 2) Select an output mode to be adjusted with the mode key and
the scroll key.
3) Enter the adjustment value (specified value) of the middle
speed mode and press [OK] key.
Remark: By setting the default value, the specified voltage is 
normally outputted.
The adjustment value of each color mode is specified on the label
attached to the MC/DV high voltage power PWB. Enter that value.
DVK:XXX DVC:XXX DVM:XXX DVY:XXX
When the adjustment value (specified value) of the middle speed
mode is set, the adjustment values of the other modes are auto-
matically set according to the middle speed mode setting in a cer-
tain relationship.
To adjust all the modes individually, first adjust the middle speed
mode, then adjust the other mode.
If the middle speed mode is adjusted after adjustment of all the
modes individually, the adjustment values of the other modes are
automatically changed. Use care for that.Therefore, unless there may be an abnormality in the output volt-
age, there is no need to check the output value.
If it must be checked that the normal voltage is outputted or if an
adjustment is required by referring to the output voltage, follow the
procedures below.
1) Remove the main unit rear cover.
EXECUTE
EXECUTE
0
A:Axxx
Bxxx
Cxxx
!MIDDLE SPEED DVB_K

!MIDDLE SPEED DVB_C

!MIDDLE SPEED DVB_M
SIMULATION
!NO.08-01
DV SETTING AND OUTPUT
xxx

!0700
OK
TESTCLOSE
EXECUTE
Dxxx
!MIDDLE SPEED DVB_Y
LOWMIDDLE
0
A:Axxx
Bxxx
CxxxMIDDLE SPEED DVB_K
MIDDLE SPEED DVB_C
MIDDLE SPEED DVB_M
SIMULATION
!NO.08-01
DV SETTING AND OUTPUT
xxx
0700
OK
TESTCLOSE
EXECUTE
DxxxMIDDLE SPEED DVB_Y
LOWMIDDLE
10-key
or after 30 sec.
Item ModeAdjustment value Monitor (MC/DV high voltage PWB)
Actual 
voltage Adjustment 
rangeDefault 
valueMonitor voltage 
(Specified value)ConnectorPin 
No. 
MIDDLE A MIDDLE SPEED DVB_K K Developing bias voltage 
(Middle speed mode)0 – 700 450 12.1 ± 0.36V CNMON 7 –450V
B MIDDLE SPEED DVB_C C Developing bias voltage 
(Middle speed mode)0 – 700 450 12.1 ± 0.36V CNMON 5 –450V
C MIDDLE SPEED DVB_M M Developing bias voltage 
(Middle speed mode)0 – 700 450 12.1 ± 0.36V CNMON 3 –450V
D MIDDLE SPEED DVB_Y Y Developing bias voltage 
(Middle speed mode)0 – 700 450 12.1 ± 0.36V CNMON 1 –450V
LOW A LOW SPEED DVB_K K Developing bias voltage 
(Low speed mode)0 – 700 430 11.4 ± 0.34V CNMON 7 –430V
B LOW SPEED DVB_C C Developing bias voltage 
(Low speed mode)0 – 700 430 11.4 ± 0.34V CNMON 5 –430V
C LOW SPEED DVB_M M Developing bias voltage 
(Low speed mode)0 – 700 430 11.4 ± 0.34V CNMON 3 –430V
D LOW SPEED DVB_Y Y Developing bias voltage 
(Low speed mode)0 – 700 430 11.4 ± 0.34V CNMON 1 –430V
1
2