Casio WK-240 Service Manual & Parts Catalogue page 27

WK-240
C-3. Check that the following screen appears.
C-4. Press the [0] button to return to the main screen.
D. RAM Check
D-1. Press the [6] button to select the "RAM Check".
D-2. Press the [1] button to start the check.
D-3. Check that the following screen appears.
D-4. Press the [0] button to return to the main screen.
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