Casio CTK-680, Руководство по обслуживанию

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MAJOR WAVEFORMS
1
3
B
E
F
C
D
4
5
9
0
A
2
6
7
8
CH1
CH1
CH1
CH2
CH2
CH3
CH2
CH1
CH3
CH1
CH2
CH3
CH2
CH1
CH2
CH3
CH1: 5 V CH1: 5 V CH2: 5 V CH3: 5 V CH2: 5 V CH3: 5 V
CH1: 5 V CH1: 5 V CH2: 5 V CH3: 5 V
CH1: 5 V CH2: 5 V CH1: 20 mV CH2: 20 mV
˜ ˜
1
µ
s 0.5 s
5 ms 20
µ
s
0.5 s 1
µ
s
1 Voltage VDD
JG connector pin 8
2 Initial reset signal
RH5VL36A pin 1
3 Power ON signal NMI
JF connector pin 4
4 APO signal
JG connector pin 5
5
Reset signal
UPD65611GB-019-38A pin 9
6 Key scan signal KC0
HG52E35P pin 44
7 Key scan signal KC1
HG52E35P pin 45
8 Key scan signal KC2
HG52E35P pin 46
9 Button scan signal KO0
JF connector pin 6
0 Button scan signal KO1
JF connector pin 7
A Button scan signal KO2
JF connector pin 8
B Word clock WOK1
UPD6376GS pin 13
C Data S1 (Note OFF)
UPD6376GS pin 15
D
Bit clock BOK
UPD6376GS pin 16
E Sound waveform (L)
JG connector pin 14
F Sound waveform (R)
JG connector pin 13
Tone: Whistle (No. 078)
Key: A4
Touch response: OFF
CH3: 5 V CH2: 5 V