Casio CTK-4000 - 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
OK
OK
TEST 1-9
TEST 1-9
TEST 1-9