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10) Set the main cassette lead edge void adjustment value (Exposure

display <PHOTO> ON)* again.
● 1 step of the set value corresponds to about 0.127 mm shift.

● Calculate the set value from the formula below.
B/0.127 (mm) = Lead edge void adjustment value <B: Lead edge
void (mm)>

Example: When setting the lead edge void to 2.5 mm:

2.5 /0.127 = about 20

Note: If the set value is not obtained from the above formula, per-

form the fine adjustment.

∗ Second cassette lead edge void adjustment: Exposure display

<AUTO + MANUAL + PHOTO>
Multi bypass tray lead edge void adjustment: Exposure display
<MANUAL + PHOTO>

Adjustment

mode

SIM

LED

Set

value

Spec value

Set

range

OC image
lead edge
position

50-1

AUTO

99  –
R/0.127

Lead edge
1 

∼ 4 mm

1 

∼ 99

Main
cassette
lead edge
void

PHOTO

B/0.127

Second
cassette
lead edge
void

AUTO +

MANUAL

+ PHOTO

Multi
bypass tray
lead edge
void

MANUAL

+ PHOTO

Print start
position

EXP1

99  –
H/0.127

1) Set a scale on the OC table as shown below.

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

in parallel with the edge lines.

2) Make a copy, Then use the copy output as an original to make an

SPF copy again.

3) Check the copy output. If necessary, perform the following adjust-

ment procedures.

5

10

2.5mm

2.5mm

Scale image

Paper rear edge

Void amount (Standard value: 4mm or less) 

4) Execute SIM 50-1.
5) Set the SPF lead edge position set value (Exposure display

<MANUAL> ON) so that the same image is obtained as that ob-
tained in the previous OC image lead edge position adjustment.

Adjustment

mode

SIM

LED

Set

value

Spec value

Set

range

SPF image
lead edge
position

50-1

MANUAL

1 step:
0.127
mm shift

Lead edge
void: 6 mm
or less

1 

∼ 99

1) Set a scale as shown in the figure below.

2) Set the document size to A4 (8.5" 

× 11"), and make a copy at

100%.

3) If necessary, perform the following adjustment procedure.

4) Execute SIM 50-1 and set the density mode to AUTO + PHOTO

(Rear edge  void).
The currently set adjustment value is displayed.

5) Enter the set value and press the start key.

The correction value is stored and a copy is made.

Mode

SIM

LED

Set

value

Specifi-

cation

Set

range

Rear edge void SIM 50-1

AUTO +

PHOTO

1 step:
0.127
mm shift

4 mm

or less

1 

∼ 99

∗1
Second print
surface rear
edge void

∗1   

SIM 50-1

     

∗2

EXP 5

4 mm

or less

∗1: DM-2000 cannot be used.

∗2: Set to S → D mode before execution
d. Paper off center adjustment

1) Execute SIM 50-1 and set the density mode of AUTO + MANUAL

(Left edge void) to 1.

2) Set a test chart (UKOG-0089SCZZ or UKOG-0123FCZZ) on the

document table.

3) Select a paper feed port and make a copy.

Compare the copy and the test chart. If necessary, perform the
following adjustment procedure.

DM-2000

6  –  3

4) Execute SIM 50-10.

After completion of warmup, shading is performed and the cur-
rently set off center adjustment value of each paper feed port is
displayed.

5) Enter the set value and press the start key.

The correction value is stored and a copy is made.

Mode

SIM

LED

Set value

Specifi-

cation

Set

range

Paper off

center

SIM 50-10

Selected 

tray ON

Add 1:
0.127 mm
shift to R
side.
Reduce 1:
0.127 mm
shift to L
side.

Single:
Center

±2.0 mm

1 

∼ 99

∗1

Second

print

surface

off-center

∗1   

SIM 50-10

No

display

Duplex:

Center

±2.5 mm

∗1: DM-2000 cannot be used.

∗ When SIM 48-01 (AE) is executed, the document off-center is auto-

matically set. Therefore, the off-center adjustment previously
described in 5) must be adjusted again.

e. Left edge void area adjustment
Note: Before performing this adjustment, be sure to check that the

paper off center adjustment (SIM 50-10) is completed.

1) Set a test chart (UKOG-0089SCZZ or UKOG-0123FCZZ) on the

document table.

2) Select a paper feed port and make two copies.

Compare the second copy and the test chart. If necessary, per-
form the following adjustment procedure.
∗ The first copy does not show the void. Be sure to check the

second copy.

3) Execute SIM 50-1 and set the density mode to AUTO + MANUAL

(Left edge void).
The currently set adjustment value is displayed.
(When the off center adjustment previously described is per-
formed,  “0” is displayed.)

4) Enter the set value and press the start key.

The correction value is stored and a copy is made.

Mode

SIM

LED

Set value

Specification

Set

range

Left
edge
void

50-1

AUTO +

MANUAL

1 step:
0.127 mm
shift

Both side 4
mm or less

1 

∼ 99

∗ When the left edge void is set with the paper off center adjusted, the

both edge void is automatically adjusted.

1) Remove the OC glass and the right cabinet.

2) Loosen the copy lamp unit wire fixing screw.

3) Manually turn the mirror base drive pulley and bring No. 2/3 mirror

base unit into contact with the positioning plate.
At that time, if the front frame side and the rear frame side of No.
2/3 mirror base unit are brought into contact with the positioning
plate at the same time, the mirror base unit parallelism is proper.
If one of them is in contact with the positioning plate, perform the
adjustment of 4).

Wire fixing screw

DM-2000

6  –  4

4) Loosen the set screw of the scanner drive pulley which is not in

contact with No. 2/3 mirror base unit positioning plate.

5) Without moving the scanner drive pulley shaft, manually turn the

scanner drive pulley until the positioning plate is brought into con-
tact with No. 2/3 mirror base unit, then fix the scanner drive pulley.

6) Put No. 2/3 mirror base unit on the positioning plate again, push

the projections on the front frame side and the rear frame side of
the copy lamp unit to the corner frame, and tighten the wire fixing
screw.

(3) Main scanning direction (FR direction) distortion adjustment
This adjustment must be performed in the following cases:
● When the mirror base drive wire is replaced.

● When the lamp unit, or No. 2/3 mirror holder is replaced.

● When a copy as shown is made.

1) Set A3 (11" 

× 17") white paper on the original table as shown

below.

2) Open the original cover and make a normal (100%) copy.
3) Measure the width of the black background at the lead edge and

at the rear edge.

If the width (La) of the black background at the lead edge is equal
that (Lb) at the rear edge, there is no need to execute the follow-
ing procedures of 4) 

∼ 7).

4) Loosen the mirror base drive pulley fixing screw on the front frame

side or on the rear frame side.

● When La < Lb

Turn the mirror base drive pulley on the front frame side in the
arrow direction A. (Do not move the mirror base drive pulley
shaft.)

● When La > Lb

Turn the mirror base drive pulley on the front frame side in the
arrow direction A. (Do not move the mirror base drive pulley
shaft.)

5) Tighten the mirror base drive pulley fixing screw.

Lb

La

Original

Copy

Paper exit 
direction

Fit the paper edge and
 the glass holding plate edge. 

A3 (11" x 17") white paper

Glass holding plate

Allow a little space. 

Paper exit direction

La: Lead edge black background width
Lb: Rear edge black background width

A

B

Rear side

Front side

DM-2000

6  –  5

<Adjustment specification>
La = Lb

6) Execute the main scanning direction (FR) distartion balance ad-

justment previously described in 2) again.

When there is no skew copy in the mirror base scanning direction and
there is no horizontal error (right angle to the scanning direction), the
adjustment can be made by adjusting the No. 2/3 mirror base unit rail
height.
Before performing this adjustment, be sure to perform the horizontal
image distortion adjustment in the laser scanner section.
This adjustment must be performed in the following cases:
● When the mirror base wire is replaced.

● When the copy lamp unit or No. 2/3 mirror unit is replaced.

● When the mirror unit rail is replaced or moved.

● When a following copy is made.

1) Making of a test sheet

Make test sheet by drawing parallel lines at 10 mm from the both
ends of A3 (11" 

× 17") white paper as shown below. (These lines

must be correctly parallel to each other.)

2) Make a normal (100%) copy of the test sheet on A3 (11" 

× 17")

paper. (Fit the paper edge with the glass holding plate edge.)

3) Measure the distances (La, Lb, Lc, Ld) at the four corners as

shown below.

When La = Lb and Lc = Ld, no need to perform the procedures
4) and 5).

4) Move the mirror base B rail position up and down (in the arrow

direction) to adjust.

● When La  Lb

Shift the mirror base B rail upward by the half of the difference
of La – Lb.

● When La  Lb

Shift the mirror base B rail downward by the half of the difference
of Lb – La.

  Example:

When La = 12 mm and Lb = 9 mm, shift the
mirror base B rail upward by 1.5 mm.

● When Lc  Ld

Shift the mirror base B rail downward by the half of the difference
of Lc – Ld.

● When Lc  Ld

Shift the mirror base B rail downward by the half of the difference
of Ld – Lc.

∗ When moving the mirror base rail, hold the mirror base rail with

your hand.

<Adjustment specification>
La = Lb, Lc = Ld

5) After completion of adjustment, manually turn the mirror base

drive pulley, scan the mirror base A and mirror base B fully, and
check that the mirror bases are not in contact with each other.
∗ If the mirror base rail is moved extremely, the mirror base may

be in contact with the frame or the original glass. Be careful to
avoid this.

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

CCD unit is properly installed.

1) Put a scale on the original table as shown below.

2) Execute SIM 48-1.
3) After warmup, shading is performed and the current set value of

the main scanning direction magnification ratio is displayed on the
display section in 2 digits.

4) Select the mode and press the start key again.

Original

Copy A

Copy B

10mm

10mm

10mm

10mm

Parallel line

White paper

Parallel line

La

Lb

Ld

Lc

Paper exit 
direction 

DM-2000

6  –  6