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5) Measure the distance from the marking position to the top of the

doctor plate of the developing unit to insure that it is 18mm.
If the distance is not within the specified range, loosen the fixing
screw A of the main pole adjustment plate, and move the adjust-
ment plate in the arrow direction to adjust.

Note:

•

Use a digital multi-meter with an internal resistance of
10M

Ω

 or more.

1) Set the digital multi-meter range to DC700V. 

2) Put the test rod of the digital multi-meter on the developing bias

voltage output check pin. 

3) Execute SIM 8-1. (The developing bias voltage is outputted for 30

sec.)

4) Adjust the adjustment volume VR31 so that the output voltage is

within the specified range shown below.

Mode

Specification

SIM

Developing bias voltage

DC-400

±

8V

SIM 8-1

VR31

Note:

•

Use a digital multi-meter with an internal resistance of
10M

Ω

 or more.

•

First adjust the grid LOW output, then adjust the grid HIGH
voltage. 

1) Set the digital multi-meter range to DC700V.

2) Put the test rod of the digital multi-meter on the grid bias voltage

output check pin. 

3) Execute SIM 8-3. (The grid bias voltage is outputted in the grid

bias LOW output mode for 30 sec.)

4) Adjust the adjustment volume VR52 so that the output voltage is

within the specified range shown below. 

5) Execute SIM 8-2. (The grid bias voltage is outputted in the grid

bias HIGH output mode for 30 sec.)

6) Adjust the adjustment volume VR51 so that the output voltage is

within the specified range shown below.

Mode

Specification

SIM

Grid bias LOW

DC-400

±

20V

SIM 8-3

VR52

Grid bias HIGH

DC-525

±

10V

SIM 8-2

VR51

a. Image lead edge position adjustment
1) Set a scale on the document table as shown below.

2) Make a copy.

3) Check the copy. If, necessary, perform the following adjustment

procedure.

4) Execute SIM 50-1. Set AE (Laser radiation timing)/Lead edge void

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value to 0. Make a copy (100%) again.

5) Set the laser radiation timing (image loss amount). Measure R in

the figure below.

Laser radiation timing = R (mm) 

×

 10

6) Set the lead edge void.

Measure H in the figure below.

Lead edge void = H(mm) 

×

 10

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

The correction value is stored and a copy is made.

Mode

Specification

SIM

Set value

Set range

Laser radiation
timing

1 ~ 4mm

SIM

45-1

1 step:
0.1mm shift

1 ~ 99

Lead edge void
adjustment

b. Rear edge void adjustment
1) Set a scale as shown in the figure below.

2) Set the document size to A4, and make two copies at 100%.

3) Check the second copy. If necessary, perform the following ad-

justment procedure.

*

The first copy does not show the void. Be sure to check the
second copy.

4) Execute SIM 50-1 and set the density mode to AE + TEXT +

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

Specification

SIM

Set value

Set range

Rear edge void

4mm or less

SIM

50-1

1 step:
0.1mm shift

1-99

c. Paper off center adjustment
1) Execute SIM 50-1 and set the density mode of Manual (TEXT)

(Left edge void) to 0.

2) Set a test chart (UKOG-0089SCZZ) 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.

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

Specification

SIM

Set value

Set range

Paper
off center

Single:
Center 

±

2.0mm

SIM

50-10

Add 1: 0.1mm
shift to R side.
Reduce 1:
0.1mm shift to
L side.

1 ~ 99

Duplex:
Center 

±

2.5mm

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

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

1) Set a test chart (UKOG-0089SCZZ) 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 Manual (TEXT)

(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

Specification

SIM

Set value

Set range

Left edge void

1 ~ 4mm

SIM

50-1

1 step:
0.1mm shift

1 ~ 99

*

When the left edge void is set with the paper off center adjusted,
the both edge void is automatically adjusted.

5mm

10mm

(Example)

Lead edge void H

Image loss R

Scale image

Paper rear edge

Void amount (Standard value: 0 

4mm)

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AR-160/161 FM/E [7] ADJUSTMENT 11/27/1998

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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).

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.

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AR-160/161 FM/E [7] ADJUSTMENT 11/27/1998

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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.

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" x 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 rear frame side in the
arrow direction B. (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. 

La = Lb

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.

Lb

La

A

B

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