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MX-B201/B201D  ADJUSTMENTS  9 - 6

1) Set the digital multi meter range to DC500V.

2) Set the positive side of the test rod to the connector CN-10-1

(DV BIAS) and set the negative side to the frame ground
(power frame).

3) Execute SIM 8-1 to output the developing bias for 30sec, and

check that the output is –400 ± 8V.

This step adjusts the front surface printing (odd-number pages of a
document set) in the S-D mode copying and the leading edge posi-
tion of an image on even-number pages in the D-S mode.

That is, it covers the adjustment of the second surface printing
mode (image loss at the front edge of an image) in which image
data is once stored in memory.

The image data is read, starting from its front end in the document
delivery direction (Reference direction of document setting in the
OC mode)and stored in memory.

This stored image data is printed starting at the printing start posi-
tion, in the order of last-stored data to the first-stored data.

In other words, the front edge image loss of the image can be
adjusted by changing the document read end position.

1) Preparing test chart (Draw a scale at the rear end of one side of

a sheet of A4 white paper or letter paper)

2) Set the test chart so that the scale is positioned as shown

below, in the S-D mode and the D-S mode.

3) Execute simulation 50-18.

Select the RSPF memory reverse output position, and press
[START] key to make a copy.

Adjust the setting so that the front edge image loss is less than
4.0 mm in the RSPF mode.
An increase of 1 in setting represents an increase of 0.1 mm in
image loss.

This is the adjustment of the first surface printing mode (rear end
void) in duplex copying.

In a duplex copying operation, the paper is delivered starting from
the rear end of the first printing surface. It is therefore necessary to
make a void area at the rear end on the first printing surface to pre-
vent paper jam at the fusing part.

There are two adjustment modes:

1) Paper trailing edge void quantity 50-19 (TEXT)

This adjustment is made when the cassette paper size is rec-
ognized. The trailing edge void quantity can be adjusted by
changing the trailing edge image laser OFF timing.

Note: • A digital multi meter with internal resistance of 1G

Ω must

be use for correct check.

• The adjustment volume is locked, and no adjustment can

be made.

Mode

Display item Default

OC memory reverse output position 

OC

50

RSPF memory reverse output position

RSPF

50

Scale (S-D mode)

Scale (D-S mode)

5 10

The front edge of the
scale on test chart

 Front edge of paper

Void area

less than 4 mm

2nd printing surface where scale is printed (lower side)

MX-B201/B201D  ADJUSTMENTS  9 - 7

2) Print start position (Duplex back surface) (RSPF) 50-19

(PHOTO)
The size (length) of a document read from the RSPF is
detected, the image at the trailing edge of the first printing sur-
face is cut to make a void area. (The adjustment of void quantity
at the time when the cassette paper size is not recognized.)

The paper void quantity should be first adjusted before the image
cut trailing edge void quantity (RSPF) is adjusted.

1) Preparing test chart (Draw a scale at the rear end of one side

of a sheet of A/4 white paper or letter paper)

2) Set the test chart on the document glass as shown below.

3) Using the user simulation [18], set the paper size of the first

cassette.

• Letter paper: 4

• A4 paper: 3

4) Execute SIM 50-19 to turn on the PRINT mode lamp and make

the printing mode in OC-D mode.
Make a copy of the test chart to check the void area of the scale
on the image.

Adjust the setting so that the void area is 4 - 5 mm. An increase in
1 of setting represents 0.1 mm in void area.

1) Set the test chart so that the scale is positioned as shown

below.

2) Execute SIM 50-19 to turn on the SCAN mode lamp and make

the printing mode in the S-D mode.

3) Remove and reinsert the cassette.

Note: Make sure to carry out this step before making a copy dur-

ing this adjustment.

4) Make a copy and check the void area of the scale on the

image.
Adjust the setting so that the void area is 2 - 4 mm. An
increase of 1 in setting represents an increase of 0.1 mm in
void area.
Void position to be checked

Place a A4 paper (white chart) so that it covers the RSPF scan
glass and the OC glass together, and close the RSPF.

When simulation 53-08 is executed, the current adjustment value is
displayed as the initial display.

* Default is 1. Adjustment range is 1 – 99. Adjustment unit 1 =

about 0.127mm

* If the values are kept as the default values, RSPF scan is not per-

formed properly. The front area of the proper scan position may
be scanned.

In case of AUTO, press [START] key, and the mirror unit scans from
the home position to the RSPF scan position with the adjustment
value displayed. The SPF glass cover edge position is calculated
from the difference between the SPF glass cover edge and the OC
side document glass CCD output level. If the adjustment is normal,
the adjusted value is displayed. If abnormal, the error LED lights up
with the current set value displayed.

During the error LED is lighted, when [START] key is pressed again,
execution is performed again.

The operation is similar to simulation 46-01. (In MANUAL)
OK/ERR display in AUTO.

Document guide

The trailing edge has a scale

Table glass

The trailing edge void on the first printing surface
 is shown above.

Paper 

Void position to be checked

Scale (S-D mode)

Mode

Display 

item

Default

LED

RSPF scan 
position auto 
adjustment

AUTO

1

COPY mode lamp

RSPF scan 
position manual 
adjustment

MANU

1

PRINT mode lamp

<When OK>

<When ERR>

53-08 SPF AUTO

AUTO  100% **    OK

53-08 SPF AUTO

AUTO  100% **    ERR

6cm or more is required.

MX-B201/B201D  ADJUSTMENTS  9 - 8

Note : Before performing this adjustment, be sure to check that the

OC mode adjustment in copying has been completed.

1) Put a scale on the original table as shown below, and make a

normal copy (100%) on the front and the back surfaces to
make a test chart. 

Note : Since the printed copy is used as a test chart, put the scale

in paralled with the edge lines.

2) Set the test chart on the RSPF and make a duplex copy (D-D or

D-S) in the normal ratio (100%).

3) Compare the scale image and the actual image.

If necessary, perform the following adjustment procedures.

4) Execute SIM 48-05.

5) The current sub scanning direction magnification ratio correc-

tion value is displayed in two digits on the display section.

6) Enter the set value and press the [START] key.

When adjusting the RSPF, use [2-SIDED COPY] key to select
single/duplex after entering the one page print mode, perform-
ing 2-page single copy.

∗

When there is no document in RSPF, copy is inhibited.

1) When the main PWB is replaced.

2) When the EEPROM in the main PWB is replaced.

3) When "U2" trouble occurs.

4) When repairing or replacing the optical section.

Used to acquire the black level target value used for the black level
adjustment of white balance.

When SIM 63-02 is executed, the current correction value is dis-
played in 3 digits of 12bit hexadecimal number.

Place the gray gradation chart (UKOG-0162FCZZ) used as the
correction document so that the density 10 (black side) comes on
the left side and that the chart is upside down at the center of the
plate left center.

When START key is pressed, the mirror base unit scans the chart
and calculates the correction value.

After completion of correction, the corrected value is displayed on
the display section.

∗

Default: 0

∗

If the value is set to the default, operation is made with 0x60.

1) Initial display

2) [ENTER]/[START] key: Correction start

<During canceling - When [Clear]/[Clear All] key is pressed->

After canceling, the machine goes into the sub code entry standby
mode. 

3) After execution

3) In case of an error

Mode

Display item Default

Sub scan magnification ratio adjustment on 
the surface of RSPF document

SIDE1

50

Sub scan magnification ratio adjustment on 
the surface of RSPF document

SIDE2

50

Adjustment mode

Spec value

SIM

Set value

Setting 

range

Sub scanning 
direction 
magnification ratio 
(RSPF mode)

At normal: 
±1.0%

48-5 Add 1: 

0.1% increase
Reduce 1: 
0.1% decrease

1 – 99

63-02 BLACK LEVEL

               0

63-02 BLACK LEVEL

EXECUTING...

THE JOB IS BEING

CANCELED.

63-02 BLACK LEVEL

             *** OK 

63-02 BLACK LEVEL

             *** ERR

Chart back surface

 

10

MX-B201/B201D  SIMULATION, TROUBLE CODES  10 - 1

：'11/Oct/17

To enter the serviceman simulation mode, press the keys as fol-
lows:

[#] key 

→

 [

∗

] key 

→

 [Clear] key 

→

 [

∗

] key

To cancel the simulation mode, press the [Clear All] key.

[Numeric] key:

Entry of MAIN CODE/SUB CODE

Selection of an item
Setup of an adjustment value in case of 
simulations for adjustment

[

]  [

]  key:

Selection of MAIN CODE/SUB CODE
Selection of an item

[ENTER]/[START] key:Settlement

<In case of simulations for print>
[ENTER] key: Settlement (Without print)

[START] key: Settlement / Print

[Clear] key:

(Interrupting operation check) Returns to the 
upper hierarchy.

In case of simulation of operation check, 
terminates the operations.

[Clear All] key: 

Exits from the simulation mode.
For a simulation of adjustment, the display 
returns to the initial display (00-00).

 Sim 

No.

Sub 

code

Operation

01

01

Mirror scan operation

02

Mirror home position sensor (MHPS) status display

06

Aging of mirror scanning

02

01

RSPF aging operation

02

RSPF sensor status display 

03

RSPF Motor ON

08

RSPF paper feed solenoid operation check 

09

RSPF reverse solenoid operation check 

03

03

Shifter operation check

05

01

Operation panel display check

02

Fusing lamp, cooling fan operation check

03

Copy lamp ON

06

01

Paper feed solenoid ON

02

Resist solenoid ON

07

01

Warm-up display and aging with jam

06

Intermittent aging

08

Shift to copy with the warm-up display

08

01

Developing bias

02

Main charger (Grid high)

03

Grid voltage (Low)

06

Transfer charger

09

01

Duplex motor normal rotation operation check 
(MX-B201D only) 

02

Duplex motor reverse operation check 
(MX-B201D only) 

04

Duplex motor rotation speed adjustment
(MX-B201D only)

10

Toner motor aging

14

Cancel of troubles other than U2

16

Cancel of U2 trouble

20

01

Maintenance counter clear

21

01

Maintenance cycle setting

22

01

Maintenance counter display

02

Maintenance preset display

04

JAM total counter display

05

Total counter display

06

Developer counter display

08

RSPF counter display

11

FAX-related counter display

12

Drum counter display

13

CRUM type display

14

ROM version display

16

Duplex counter display (MX-B201D only)

17

Copy counter display

18

Printer counter display

19

Scanner mode counter display

20

Password display

21

Scanner counter display

22

RSPF JAM counter display

24

01

JAM total counter clear

04

RSPF counter clear

05

Duplex counter clear (MX-B201D only)

06

Developer counter clear

07

Drum counter clear

08

Copy counter clear

09

Printer counter clear

10

FAX counter clear (When MX-FX12 is installed)

13

Scanner counter clear

14

RSPF JAM total counter clear 

15

Scanner mode counter clear

25

01

Main motor operation check 
(Cooling fan motor rotation check)

10

Polygon motor ON

26

02

RSPF setup

03

2ND TRAY setup

04

Machine duplex setup (DPLX)

06

Destination setup

07

Machine conditions check

20

Rear edge void setup

30

CE mark support control ON/OFF

37

Cancel of stop at developer life over

39

Memory capacity check

40

Polygon motor OFF time setup (Time required for 
turning OFF after completion of printing)

42

Transfer ON timing control setup

43

Side void setup

54

γ

 life correction setting

62

Energy-save mode copy lamp setup

69

Use to set the operation conditions for toner near 
end

30

01

Paper sensor status display

41

06

OC cover float detection level adjustment 
(Only when RSPF installed)

07

OC cover float detection margin setting 
(Only when RSPF installed)

43

01

Fusing temperature setting (Normal copy)

04

Fusing temperature setting in multi copy

05

Fusing temperature setup in duplex copy 
(MX-B201D only)

14

Fusing start temperature setting

 Sim 

No.

Sub 

code

Operation