Casio LK-120, Service Manual & Parts Manual, Page: 18 / 34

LK-120
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DIAGNOSTIC PROGRAM
INITIAL SETTING
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Connect the AC adaptor. (1(
Turn the volume to the maximum. (((
HOW TO START THE DIAGNOSTIC PROGRAM
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Hold down the “0” and “START/STOP” buttons at the same time, to turn the power ON. (1(
Set the mode switch to the “NORMAL”.
NOTEN
Be sure to turn off the power when the test is finished. NOTEN
Release the “0” and “START/STOP” ((( buttons.
After the diagnostic program is launched, the test menu appears. (((
TEST ITEMS
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Pushing a test button enables the corresponding test item to be tested.
Test Items Buttons Note
Mode Switch Check ―
Button Check 0
ROM Version Check 1
Keyboard LED Check TONE
LCD Check STEP 1
Auto Power Off Check PART SELECT
This diagnostic program does not test the following items.
Check the functions with regular power-on state.
Test Items Buttons Note
Keyboard Check ―
Headphones Check ― Headphones