Casio CTK-4000 User Manual download pdf (Page 13)

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2. AC adaptor check



Press "3" button.

Make sure that a value "XXX" shown in the illustration is in

the range of 000 to 3FF.



Press "3" button.

Make sure that a value "XXX" shown in the illustration is in

the range of 000 to 1FF.



Press "0" to end the AC adaptor Check.

3. Memory check



Press "5" button. (ROM check)



Press "1" button.

* Check for "OK" message and sound signal.



Press "0" to end the ROM Check.



Press "6" button. (RAM check)



Press "1" button.

* Check for "OK" message and sound signal.



Press "0" to end the RAM Check.

3:AD1

XXX

000 to 3FF

3:AD3

XXX

000 to 1FF

6:MEM

5:ROM

TEST

1-9

TEST

1-9

TEST

1-9

1 ... 12 13 14 ... 26

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Casio CTK-4000 User Manual Page 13