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1) Remove the developing unit, the transfer/separation charger unit,

and the main charger unit from the copier. 

2) Remove the process unit from the copier. 

3) Remove the OPC drum from the process unit, and install the

electrode sheet by using a rubber band, tape, etc. 

4) Install the OPC drum with the electrode sheet installed to the

process unit, and install the process unit to the copier. 

5) Install the drum holder unit to the copier so that the electrode

sheet lead wire can be taken out from the developing unit side.

 AR-280/285/335

AR-250/281/286/336/405/501/505

6) Clean the transfer charger wire separation lamp and install the

transfer/separation charger unit to the copier.

If necessary, wipe the lamp which can be seen from the square
hole of the TC guide rail with waste cloth.

(Do not install the main charger unit.)

7) Connect the electrode sheet and the digital multi-meter (or an

ampmeter). Manually turn on the door switch.

8) Check the drum current on the front frame side and the rear frame

side.

The current on the front and the rear frame sides: within 6.0uA

·

Turn on the main switch, and execute SIM 8-6.

(THVG will be turned ON for about 30 sec.)

·

Measure the drum current on the front frame side and the rear
frame side.

·

When the microswitch is OFF, the drum current on the front
frame side is displayed.

·

When the microswitch is ON, the drum current on the rear
frame side is displayed.

·

Check that the current on the front and the rear frame side is
6.0

m

A or less.

If the current is greater than 6.0

m

A, replace the charger unit

with new one.

9) Adjust THVG output current.

·

Turn on the main switch and execute SIM 8-6.

AR-280/285/335

AR-250/281/286/336/405

AR-501/505

N/C

N/O COM

(OFF)

N/C

N/O COM

(ON)

AR-505

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8/18/1999

(THVG will be turned on for about 30 sec.)

·

If the output current is not in the specified range, change the
displayed value and adjust. (1 step: about 0.1 

m

A)

Transfer charger

current

Adjustment spec

AR-250/280/ 
281/285/286/

335/336

AR-405

AR-501/505

TC drum current
(Front surface
mode)

+13.5+1.5

m

A

+15.0+1.5

m

A

+18.0+1.5

m

A

TC drum current
(Back surface mode)

+13.5+1.5

m

A

+15.0+1.5

m

A

+18.0+1.5

m

A

*

Check that the black clip is securely grounded to the machine
chassis. 

When UKOGE0043CS01 is used:

Knob 1:

Set to DCmA.

Knob 1:

Connect to 2. 

Red clip: Connect to (+).
Blue clip: Connect to (–).

When an ampmeter is used:

Red clip: Connect to (+) of the ammeter.
Blue clip: Connect to (–) of the ammeter.

1) Install the DV unit, the drum holder unit, and the charger units to

the copier.

2) Remove the rear cabinet. 

3) Connect the digital multi-meter to SHVG output check pin (CN2-3

pin). 

4) Set the digital multi-meter range to the DCV range. 

5) Manually turn on the door switch. 

6) Execute SIM 8-7. (SHVG will be turned on for about 30 sec.)

7) If the output voltage is not in the specified range, change the

displayed value and adjust. (1 step: about 1V)

Adjustment range

AR-250/280/

281/285/286/

335/336

AR-405

AR-501/505

Separation DC
component
voltage (Front
surface mode)

–140 

±

10V

–150 

±

10V

–200 

±

10V

Separation DC
component
voltage (Back
surface mode)

–140 

±

10V

–150 

±

10V

–200 

±

10V

This adjustment must be performed in the following cases:

·

When both sensors are cleaned in maintenance.

·

When the value of DMLED/PCLED in SIM 44-12 are greater than
about 100.
Clean both sensors and perform the adjustment.

1) Execute SIM 44-2.

2) When the adjustment is completed, the gain value is displayed. If

an error occurs during the adjustment, the error display is made.

This adjustment must be performed in the following case:

·

When new developer is supplied.

1) Execute SIM 25-2.

2) The adjustment is automatically made with the toner density sen-

sor output value displayed. After 3 minutes from starting stirring,
the toner density sensor is sampled 16 times, and the average
value is stored as the toner density adjustment value. 

*

When new developer is supplied, clear the developer counter
with SIM 24-5.

2

20

200

(DCmA)

F

R

Green grip

Yellow grip

Black grip

Body chassis
(no coating)

Black

Blue

Red

White

Orange

Orange

Microswitch

Blue grip

Red grip

Digital multi-meter
(UKOGE0043FC01)

White

AR-505

8/18/1999

6 – 5

1) Execute SIM 64-1, and print the pattern of SQUARE from the

manual feed tray. 

(A: 22  E: 1)

Set items

A:

Self print pattern

B:

Density level

C:

Setting of the number of self print sheets

D:

Density mode

1 Auto

3 Text/Photo

2 Text

4 Photo

E:

Cassette selection

1 Manual feed

5 Desk middle cassette

2 Upper cassette

6 Desk lower cassette

3 Lower cassette

7 LCC

4 Desk upper cassette

F:

Duplex print selection 

1 Simplex

2 Duplex

2) Obtain value a of the printed sheet.

3) Turn the adjustment handle to adjust according to the value a. 

Adjustment handle:

1 scale = 0.5mm (dimension a)

q<90 degress:

Right direction 

q>90 degrees:

Left direction 

Adjustment specification:

a = 0 mm, 

q

 = 90 degrees

1) Execute SIM 64-1. print one sheet from each paper feed port.

Measure the void amount both sides. 

When making duplex copy with OC, press the [CLOSE] key to
enter the copy menu and read two pages of documents.
Then press the [READ CORRECT] key.

*

Select the self print pattern which allows easy measurement of
the void amount. 

2) Execute SIM 50-10.

a

θ

Paper exit direction

AR-505

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8/18/1999

3) Change each value to adjust so that the void amounts of both

sides are even. 

a > b: Increase the value.

a < b: Decrease the value. (See the figure below.)

4) Press the CA key to terminate the simulation.

*

Normally the laser power is automatically corrected by process
control. Use the image density adjustment described later unless
there is a special request from the user. 

All must be set to "16".

All must be set to "7".

Set all to "5" except for PH256.

All must be set to "5".

1) Insert the front/rear mirror base drive wire into the frame groove

and press and fix it with the wire fixing plate. At that time, do not
tighten the wire fixing screw. 

Change the direction of the lamp positioning plate. (F and R)

2) Push the copy lamp unit onto the positioning plate, and tighten the

wire fixing screw.

b

a

b

a

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8/18/1999

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