AR-155 (serv.man10). AR150 155 ARF151 Service Manual-Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 9

4) If the measured value is out of the specified range, change the set

value and repeat the adjustment procedure.
When the set value is increased by 1, the copy image is shifted by
0.1mm toward the rear frame.

●

For the manual paper feed, change the manual paper feed ad-
justment mode and perform the similar procedures.

●

Since the document center offset is automatically adjusted by
the CCD which scan the reference lines (F/R) on the back of
document guide, there is no need to adjust manually.

The copy density adjustment must be performed in the following cases:

●

When maintenance is performed. 

●

When the developing bias/grid bias voltage is adjusted.

●

When the optical section is cleaned. 

●

When a part in the optical section is replaced. 

●

When the optical section is disassembled. 

●

When the OPC drum is replaced. 

●

When the main control PWB is replaced. 

●

When the EEPROM on the main control PWB is replaced. 

●

When the memory trouble (U2) occurs. 

●

Clean the optical section. 

●

Clean or replace the charger wire. 

●

Check that the voltage at the high voltage section and the develop-
ing bias voltage are in the specified range. 

●

One of the following test charts:
UKOG-0162FCZZ, UKOG-0089CSZZ, KODAK GRAY SCALE

●

B4 (14

″  × 8 1/2″) white paper

●

The user program AE setting should be “3.”

Test chart comparison table

UKOG-
0162FCZZ
DENSITY No.

1

2

3

4

5

6

7

8

9

10

W

UKOG-
0089CSZZ
DENSITY No.

0.1

0.2

0.3

0.5 1.9

0

KODAK GRAY
SCALE

1

2

3

4

19

A

For the copy density adjustment, the image data shift function provided
in the image process LSI is used.

List of the adjustment modes

Auto Mode

Brightness 1 step only

Manual Mode

Brightness 5 steps. Adjustment of only the
center brightness is made. 

Photo Mode

Brightness 5 steps. Adjustment of only the
center brightness is made.

 

Manual T/S
mode

Brightness 5 steps. Adjustment of only the
center brightness is made. 

T/S Auto mode

Brightness 1 step only

Use SIM 46-01 to set the copy density for each copy mode. 
For selection of modes, use the copy mode select key. 

(1) Test chart (UKOG-0162FCZZ) setting
1) Place the test chart so that its edge is aligned with the A4 (Letter)

reference line on the document table. Then place a B4 (14

″  ×  8

1/2

″) white paper on the test chart and close the document cover.

(2) Perform the adjustment in each mode.
1) Execute SIM 46-1.

2) Select the mode to be adjusted with the exposure mode select key.

Set the exposure level to 3 for all adjustment. (Except for the auto
mode.)

Adjustment

mode

Exposure mode

display lamp

Ex-

posure

level

Sharp gray chart

adjustment level

Auto mode

Auto lamp ON

—

“3” is slightly
copied.

Manual mode

Manual lamp ON

3

“3” is slightly
copied.

Photo mode

Photo lamp ON

3

“3” is slightly
copied.

Manual T/S

mode

Manual lamp/Photo

lamp ON

3

“4” is slightly
copied.

Auto T/S

mode

Auto lamp/Photo

lamp ON

3

“4” is slightly
copied.

1

10

W

2

3

4

5

6

7

8

9

Test chart

White paper

(1)

(2)

(1) Mode select key/display 

lamp

(2) Exposure level select 

key/display lamp

AR-F151

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