AL-1566 (serv.man13). Test command, fax soft switch, trouble codes - Sharp Copying Equipment Service Manual (repair manual). Page 5

AL-1556/1566  TEST COMMAND, FAX SOFT SWITCH, TROUBLE CODES  10 - 5

5

01

Operation panel display 
check (LCD/LED CHK)

[Function]
<LED check mode (All ON/Individual ON)>
When [OK/START] key is pressed, all the LCD's on the operation panel are turned ON (all pixels ON).

After 5sec of ON, the machine goes into the sub code entry standby mode.

When [MODE SWITCH] key is pressed under the all ON state,  the mode is shifted to the individual
ON mode, where the LED's are turned on one by one from the left upper end to the left lower side
then from the right upper side to the right lower side. (All the pixels of LCD are lighted simultaneously.)
After lighting all the LCD's sequentially, all the LCD's are lighted simultaneously. After 5sec from light-
ing all the LCD's simultaneously, the machine goes into the sub code entry standby mode. (Cycle of
individual ON mode: ON 300ms, OFF 20ms)

When [C] key is pressed in the LED check mode, the machine goes into the sub code entry standby
mode.

When [START] key is pressed, the machine goes into the key input check mode.

<Key input check mode>
When the machine goes into the key input check mode, the LCD displays 0.

When any key is pressed after pressing a key on the operation panel, "+1" is added to the value.

Once a key is pressed, it is not recounted.

When [START] key is pressed, counting is made and the machine goes into the LED ON check mode
(LED all ON status) after 3sec.

When [C] key is pressed for the first time, it is counted. When it is pressed for the second time, the
machine goes into the sub code entry mode.

When [CA] key is pressed for the first time, it is counted. When it is pressed for the second time, the
machine goes out from the test command mode.

(Note in the key input check mode)
• Be sure to press [START] key at the last. (If it is pressed on the way, the machine goes into the LED

ON check mode.) (LED all ON status)

• Multi key input is ignored.

[Operation]
<LED check mode (All ON/Individual ON)>

<Key input check mode>

02

Fusing lamp, cooling fan 
operation check (HT LAMP 
CHK)

[Function]
When [OK/START] key is pressed, the fusing lamp repeats ON for 500ms and OFF for 500ms 5
times. During this period, the cooling fan motor rotates.

03

Copy lamp ON check 
(C-LAMP CHK)

[Function]
When [OK/START] key is pressed, the copy lamp turns ON for 5sec.

Main 
code

Sub 

code

Contents

Details of function/operation

1) Initial 

display

2) When [MODE SWITCH] key is pressed, the machine goes into the individual ON mode.

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1) Initial display

2) [OK/START]

05-01 LCD/LED CHK.

                     0

05-01 LCD/LED CHK.

                    **

1) Initial display

05-02 HT LAMP CHK

EXECUTING...

1) Initial display

05-03 C-LAMP CHK

EXECUTING...