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AL-1556/1566  TEST COMMAND, FAX SOFT SWITCH, TROUBLE CODES  10 - 21

46

29

Image contrast adjustment 
(600dpi) (GAMMA 600)

[Function]
Contrast is set for each mode.

When this test command is executed, the current se value is displayed in 2 digits (Default: 50).

Change the set value and press [START] key to make a copy under the set value.

When the set value is increased, the contrast becomes higher. When the set value is decreased, the
contrast becomes lower.

In this case, only Exp.3 copy is made. When, however, the setting is made to make higher contrast,
Exp.1 and Exp.5 copies also become in higher contrast. When made to a lower contrast, Exp1. and
Exp.5 copies become lower contrast, too.

Press [

←

/

→

] key to switch the mode. The set value of the selected mode is displayed on the LCD.

(Adjustment value: 1 – 99)

∗

No density display on LCD.

[Operation]
The operation is similar to test command 46-01.

30

AE limit adjustment (AE 
LIMIT)

[Function]
Used to set the limit value in AE and AE (toner save).
Change the setting and press [OK/START] key to write the setting into the EEPROM. The machine
goes into the sub code entry standby mode.
By pressing [

←

/

→

] key, setting is changed. (Setting range: 0 – 31, Default: 0)

<Remark>

When test command 26-06 (Destination setting) or test command 46-19 Auto Exposure mode is
changed, the setting of this test command is also changed to the default in connection.

[Operation]
The operation is similar to test command 46-19.

31

Image sharpness 
adjustment (SHARPNESS)

[Function]
Used to adjust sharpening/blurring of image in each mode.

When this test command is executed, warm-up and shading are performed and the current set value
is displayed. (Default: 1)
Change the set value and press [START] key to make a copy under the set conditions.
To change the mode, press [

←

/

→

] key. The code number of the selected mode is dip0slayed on the

LCD.

[Operation]
The operation is similar to test command 46-01.

Main 
code

Sub 

code

Contents

Details of function/operation

Mode

Display item

Default

LED

AE mode (600dpi)

AE

50

COPY mode lamp

TEXT mode (600dpi)

TEXT

50

PRINT mode lamp

PHOTO mode 

PHOTO

50

SCAN mode lamp

TS mode (TEXT)(600dpi)  

TSTXT

50

PRINT  mode  lamp
SCAN mode lamp

TS mode (AE)(600dpi)   

TSAE

50

COPY mode lamp
SCAN mode lamp

Mode

Display item

Remark

Limit value for AE

AE

Limit value for AE (toner save)

TSAE

Image quality 

Setting  No

Remark

Blurring

0

Standard

1

Default

Sharpening

2

Mode

Display item

Default setting

LED

AE mode 

AE

1

COPY mode lamp

TEXT mode 

TEXT

1

PRINT mode lamp

PHOTO mode 

PHOTO

1

SCAN mode lamp

TS mode  (TEXT) 

TSTXT

1

PRINT mode lamp
SCAN mode lamp

TS mode  (AE) 

TSAE

1

COPY mode lamp
SCAN mode lamp

AL-1556/1566  TEST COMMAND, FAX SOFT SWITCH, TROUBLE CODES  10 - 22

46

32

Copier color reproduction 
setting (COLOR 
REAPPEAR)

[Function]
Used to set color reproduction in each mode. Colors easy to be copied and colors difficult to be copied
can be switched.

∗

This setting has virtually no effect on black-and-white documents.

When this test command is executed, warm-up and shading are performed and the current set value
is displayed. (Default: 0)
Press [START] key to make a copy under the set conditions . At that time, color components are
changed for used in copying.
To change the mode, press [

←

/

→

] key. The code number of the selected mode is dip0slayed on the

LCD.

[Operation]
The operation is similar to test command 46-01.

39

FAX mode sharpness 
adjustment (AL-1566)

[Function]
When [START] key is pressed, scan is started with the entered sharpness adjustment value, and the
data of the selected mode stored on the FAX side is changed to the entered value.

Main 
code

Sub 

code

Contents

Details of function/operation

Set value

Colors easy to be copied

Colors difficult to be copied

0

Purple, Blue, Red

Yellow, Green, Water blue

1

Water blue, Green, Blue

Purple, Red, Yellow

2

Yellow, Red, Green

Blue, Water blue, Purple

Specification component

Setting No

Remark

Green

0

Default

Red

1

Blue

2

Mode

Display item

Default setting

LED

AE mode (including TS)

AE

0

COPY mode lamp

TEXT mode (including TS)

TEXT

0

PRINT mode lamp

PHOTO mode 

PHOTO

0

SCAN mode lamp

Sharpness adjustment value data table

When initializing each data: 1

Mode

Sharpness adjustment value

1: STD
2: FINE

3: S-FINE

4: FINE/PHOTO
5: S-FINE/PHOTO

1) Initial display

2) [

←

/

→

] or after 2sec

Every time when [

→

] key is pressed, the

second line is changed in the sequence of
No. 1 

→

 2 

→

 3 

→

 4 

→

 5 

→

 1.

When [

←

] key is pressed, the sequence is

reversed.

3) Select the arrow key 1-5, and the LED of

[START] key is lighted.

("ZZZZ" is the mode selected among STD,
FINE, S-FINE, FINE/PHOTO, and S-FINE/
PHOTO.)

("X" is the corresponding sharpness adjustment
value of the selected mode stored on the FAX
side.)

∗

[CLEAR] key: Returns to “2)” display.

4) Enter a one-digit value (0-2) as the sharp-

ness adjustment value with [10KEY].

("Y" is the entered sharpness adjustment value.)

∗

[CLEAR] key: Returns to “2)” display.

5) Scan start (self print)

6) Print start (self print)

After completion of printing, returns to “4)” 
display.

SHARPNESS SETTING

PRESS 

←

,

→

SHARPNESS SET (1-5)

1:STD

SHARPNESS SETTING

ZZZZ(0-2)       X

SHARPNESS SETTING

ZZZZ(0-2)       Y

SHARPNESS SETTING

 SCAN           Y

SHARPNESS SETTING

 PRINT          Y

AL-1556/1566  TEST COMMAND, FAX SOFT SWITCH, TROUBLE CODES  10 - 23

48

01

Main scan/sub scan 
direction magnification ratio 
(COPY MAG.)

[Function]
Used to adjust the magnification ratio in the main scan (front/rear) direction and sub scan direction.
Enter the adjustment value with [10KEY]. Press [START] key to save the set value and make a copy.
(When the adjustment value is increased by 1, the magnification ratio is increased by 0.1%.)
The adjustment mode can be changed by pressing [

←

/

→

] key. (Adjustment range: 1 – 99, Default: 50)

[Operation]
The operation is similar to test command 46-01.

05

SPF/RSPF mode sub scan 
direction magnification ratio 
in copying (SPF/RSPF 
MAG.)

[Function]
Used to display the current SPF/RSPF mode sub scan direction magnification ratio on the LCD. 
When [START] key is pressed, the entered data is acquired and saved into the EEPROM, and a copy
is made. (When the set value is increased by 1, the magnification ratio is increased by 0.1%.) 
(Adjustment range: 1 – 99, Default: 50)

When adjusting the RSPF, use [2-SIDED COPY] key to select single/duplex after entering the one
page print mode, performing 2-page single copy.

For printing, regardless of the density mode and the density level, 

Density mode = MANUAL
Density level = 3

∗

When there is no document in SPF, copy is inhibited.

*1: Only when RSPF is installed. If installed, skipped.

[Operation]
The operation is similar to test command 46-01.

Main 
code

Sub 

code

Contents

Details of function/operation

Mode

Display item

Default value

LED

Main scan direction magnification ratio

F-R

50

PRINT mode lamp

OC mode sub scan direction 
magnification ratio

SCAN

50

SCAN mode lamp

Mode

Display item

Default

LED

Sub scan magnification ratio adjustment on the 
surface of SPF/RSPF document 

SIDE1

50

COPY mode lamp

Sub scan magnification ratio adjustment on the 
surface of RSPF document *1

SIDE2

50

PRINT mode lamp

AL-1556/1566  TEST COMMAND, FAX SOFT SWITCH, TROUBLE CODES  10 - 24

49

01

Download mode 
(DOWNLOAD MODE)

[Function]
When this test command is executed, "DLOWNLOAD MODE" is displayed on the LCD and the
machine goes into the program writing mode from PC to Flash ROM.

Use the writing tool on the PC and write the program. 

During writing, the display shows as follows:

After completion of download, turn OFF/ON the power to reset.

In case of an error in download, the following message is displayed on the LCD.

To enter the download mode, there is a method to use key operations as well as to use a test com-
mand. With the power OFF, press and hold [CA] + [

←

], turn on the power.

Main 
code

Sub 

code

Contents

Details of function/operation

Status

Display item

Download data receiving

RECEIVING

Loader function transfer 

LOADER COPYING

Date delete start

FLASH ERASE

Data write (Boot section)

BOOT WRITING

Data write (Program section)

PROGRAM WRITING

Data write (EEPROM)

E2PROM WRITING

Data write (LCD)

LCD DATE WRITING

During SUM CHECK

FLASH ROM SUM CHECK

During BOOT SUM CHECK

BOOT SUM CHECK

During EEPROM SUM CHECK

EEPROM SUM CHECK

Download complete

DOWNLOAD COMPLETE!

Error status

Display item

PC data receiving

E-01 PC TRANS

Loader function transfer

E-02 LOADER COPY

FLASH ROM delete

E-03 FLASH ERASE

Boot section FLASH ROM write

E-04 BOOT WRITE

Program section FLASH ROM write

E-05 PROGRAM WRITE

Loader section SUM CHECK

E-06 LOADER SUM

Boot section SUM CHECK

E-07 BOOT SUM

Program section SUM CHECK

E-08 PROGRAM SUM

E2PROM SUM CHECK

E-09 E2PROM SUM

E2PROM write

E-10 E2PROM WRITE

E2PROM read Verify

E-11 E2PROM READ

E2PROM collating Verify

E-12 E2PROM COLLATE

Boot section lens check 

E-13 BOOT LENGTH

Program section lens check 

E-14 PROGRAM LENGTH

E2PROM lens check 

E-15 E2PROM LENGTH

Total data size check 

E-16 DATE SIZE

IMC communication error

E-17 IMC TRANS

IMC FRASH ROM write

E-18 IMC FLASH WRITE

LCD section lens check 

E-19 LCD DATE LENGTH

LCD section FLASH ROM write

E-20 LCD DATE WRITE

LCD section SUM CHECK

E-21 LCD DATE SUM

1) Initial display

DOWNLOAD MODE