Casio CTK-631 Service Manual
Also see for CTK-631: User guideUser guide
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— 13 —MAJOR WAVEFORMS1 NMI signalJD connector pin 12 APO signalJH connector pin 65 Key scan signal KC0JA connector pin 96 Key scan signal KC1JA connector pin 103 Button scan signal PA0JD connector pin 94 Button scan signal PA1JD connector pin 89 DAC output (L-ch)JH connector pin 90 DAC output (R-ch)JH connector pin 8A Sound signal (L-ch)JK connector pin 4B Sound signal (R-ch)JK connector pin 57 RS signal PA4JJ connector pin 48 R/W signal PA5JJ connector pin 512CH1CH234CH1CH256CH1CH278CH1CH290CH1CH2ABCH1CH20.5 s 20 ms50 μs 0.5 s1 ms 1 msCH1: 5 V– CH2: 5 V– CH1: 5 V– CH2: 5 V–CH1: 5 V– CH2: 5 V– CH1: 5 V– CH2: 5 V–CH1: 50 mV˜ CH2: 50 mV˜ CH1: 50 mV˜ CH2: 50 mV˜Power button ONPower ON |
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