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AR-C330  SETTING AND ADJUSTMENTS  7 - 14

(Example) Set the simulation set values as shown below.

A: 100

→

Set value

A: 73 (=100 –27)

B: 112

B: 129 (=112 + 17)

C: 95

C: 110 (=95+15)

AR-C330  SETTING AND ADJUSTMENTS  7 - 15

When deflection is made to the positive (+) side in the rough adjustment, increase the value on the positive (+) side.

When the deflection is made to the negative (–) side in the rough adjustment, increase the value on the negative (–) side.

If the rough adjustment pattern or the fine adjustment pattern is
not in the above range, perform the following procedures

5) Calculate the shift from the adjustment reference position for

each adjustment mode.

The sum of the shift of rough adjustment reference and the
shift of fine adjustment is the actual shift.

Shift (Correction value) = Rough adjustment shift + Fine
adjustment shift

The interval between scales of the rough adjustment reference
corresponds to 20. Be careful of polarities of the shift (positive
or negative) when calculating.

6) Select the mode to be adjusted with the scroll key.

7) Add or reduce to or from the current adjustment value, enter

the obtained value, and press the [OK] key.

• When the shift (correction value) is positive:

Adjustment value = Current adjustment value + Shift (Cor-
rection value)

• When the shift (correction value is negative:

Adjustment value = Current adjustment value – Shift (Cor-
rection value)

8) Press the [EXECUTE] key.

The adjustment pattern is printed.

Check that the conditions of procedure 4) are satisfied.

Repeat procedures 4) – 8) until the conditions of procedure 4) are
satisfied.

NOTE: Before performing this adjustment, SIM 44-31 (drum

phase adjustment) must have been adjusted properly.

20

∗

C

∗

C

∗

B

∗

A

20

(Example)
When the simulation is set to 105, 
newly set to 78 (= 105 – 27).

∗

A: Rough adjustment pattern

∗

B: Fine adjustment pattern

∗

C: Adjustment range

(Example)
When the simulation is set to 105, 
newly set to 132 (= 105 + 27).

AR-C330  SETTING AND ADJUSTMENTS  7 - 16

This adjustment must be performed in the following cases:

• When the scanner (reading) section is disassembled.

• When a copy image distortion occurs.

1) Loosen the screw which is fixing the scanner unit A and the

drive wire, and remove the scanner unit A from the drive wire.

2) Manually turn the scanner drive gear to bring the scanner unit

B into contact with the stopper.

At that time, if the scanner unit B makes contact with the two
stoppers on the front and the rear frame simultaneously, the
parallelism of the scanner unit B is proper.

If not, perform the following procedures.

3) Loosen the fixing screw of the scanner unit drive pulley on the

side where the scanner unit B is not in contact with the stop-
per.

4) While keeping the scanner unit drive shaft stationary, turn the

scanner unit drive pulley manually so that the scanner unit B
makes contacts with two stoppers on the front and the rear
frame side simultaneously. (Change the relative positions of
the scanner unit drive pulley and the drive shaft.)

5) Fix the scanner unit drive pulley fixing screw which was loos-

ened in procedure 3).

6) Perform procedure 2).

Repeat procedures 3) – 6) until the parallelism of the scanner
unit B becomes proper.

7) With the scanner unit B in contact with two stoppers on the

front and the rear frame side simultaneously, slide the scanner
unit A until it comes to the right end of the frame, and fix it to
the drive wire with the fixing screw.

Scanner unit A

Scanner unit B

AR-C330  SETTING AND ADJUSTMENTS  7 - 17

1) Make a test chart on A3 (11 x 17") paper as shown below.

(Draw a rectangular with four right angles.)

2) Set the test chart made in procedure 1) on the document

table. (Leave a space of about 30mm between the reference
position and the test chart. With the document cover open,
make a copy on A3 (11 x 17").

3) Check for distortion in the sub scanning direction.

If La = Lb, there is no distortion.

If there is some distortion in the sub scanning direction, per-
form the following procedures.

4) Loosen either of two fixing screws of the scanner unit drive

pulley. (Either one on the front or the rear side will do.)

5) With the scanner unit drive shaft kept stationary, turn the scan-

ner unit drive pulley manually to change the parallelism of
scanner units A and B. (Change the relative positions of the
scanner unit drive pulley and the drive shaft.)

6) Tighten the scanner unit drive pulley fixing screw.

Repeat procedures 2) – 6) until the condition of procedure 3)
is satisfied.

1) Make a test chart on A3 (11 x 17") paper as shown below.

(Draw a rectangle with four right angles.)

2) Set the test chart made in procedure 1) on the document

table. With the document cover open, make a copy on A3 (11
x 17").

3) Check for distortion in the main scanning direction.

If the four angles of the rectangle on the copy are right angles,
there is no distortion. (Completion of the adjustment)

If there is some distortion in the main scanning direction, per-
form the following procedures

4) Check for a difference between the right distortion and the left

distortion (balance).

If Lc = Ld, there is no difference between the left distortion and
the right distortion.

If the above condition is satisfied, go to procedure 6).

If the above condition is not satisfied, perform the following proce-
dures.

Lc

Ld

Lc

Ld

Copy A

Copy B

Left distortion is equal
to right distortion.

Lc = Ld

Left distortion is not equal
to right distortion
           Lc 

≠

 Ld