Casio LK-90TV Service Manual page 23

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. KEY LED check
10
1 Press "SCORING1" button.
* The key lights with pip sound in undermentioned the order.
* There must not be remarkable difference in the LED brightness of the adjacent key.
1) C1, D1, E1, F1, G1, A1, B1
2) C2, D2, E2, F2, G2, A2, B2
3) C3, D3, E3, F3, G3, A3, B3
4) C4, D4, E4, F4, G4, A4, B4
5) C5, D5, E5, F5, G5, A5, B5, C6
11. Console LED check
1 Press the "SPEAK" button.
* Keyboard LED must light in the undermentioned order.
1) DATA ACCESS
2) SONG CONTROLLER
3) RHYTHM CONTROLLER
12. CARD check
1 Press the "CARD" button.
13. APO check
1 Press the "PRACTICE PHRASE" button.
* Go out from TEST mode (Power off).
* The LCD turns off.
DIAGNOSTIC PROGRAM IS FINISHED.
6) C1#, D1#, F1#, G1#, A1
7) C2#, D2#, F2#, G2#, A2#
8) C3#, D3#, F3#, G3#, A3#
9) C4#, D4#, F4#, G4#, A4#
10) C5#, D5#, F5#, G5#, A5#
— 21 —
Message on LCD
UOK

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