LK-127
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F. Auto Power OFF Check
F-1. Press the “PART SELECT” button to perform the “Auto Power OFF Check”.
F-2. Check that the power supply is turned OFF and no screen appears.
NOTE:
After checking, be sure to turn the mode switch to “OFF”.
G. Key Check
NOTE:
Perform the tests with regular power-on state.
G-1. Check the following points by pressing all keys.
•
The tones sound correctly by hitting keys.
•
The pitch of the sound corresponding to a key is correct.
•
Hitting a key does not produce two tones or make sounds twice.
•
The stroke and the load of keys are normal.
•
The difference in height and the gap between keys are even.
NOTE:
Press the keys in the order shown in the figure below.
H. Headphones check
NOTE:
Perform the tests with regular power-on state.
H-1. Connect the headphones to the PHONES/OUTPUT jack.
H-2. Press any key and then check that you can hear the sound through the headphones.
H-3. Remove the headphones.
H-4. Press any key and then check that sounds come out from the speakers.
Summary of Contents for LK-127
Page 1: ...LK 127 MAR 2013...
Page 7: ...LK 127 5 PRINTED CIRCUIT BOARDS MAIN PCB M821 MDA1 POWER AMP PCB M820 PSA1...
Page 32: ...LK 127 30 KEYBOARD LED PCB M821 LDA1 to LDA2 CN503 to LD3M JG...
Page 33: ...LK 127 31 KEYBOARD LED PCB M821 LDA2 to MDA1 CN2 to LD5M JE to LD4M JF to LDA1 CN501...
Page 34: ...LK 127 32 KEYBOARD LED PCB CSM446 LD3M LD4M LD5M to LDA1 CN502 to LDA2 CN504 to LDA2 CN505...
Page 35: ...CASIO COMPUTER CO LTD CS Technical Department TOKYO JAPAN...
