PCB VIEW AND MAJOR WAVEFORMS
6 7
2 | 3 | 1 | 4 | 5 |
MC101
R125
R126
R127
R115
R114
R113
R112
R111
75 | 75 | 75 | 75 | 5 | C114 | R128 | X101 |
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| R129 |
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| E | C115 |
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R117 |
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R123 |
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R119 |
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| C116 |
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R118 |
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R116 |
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R120 |
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| R110 | 75 | |||
R121 |
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R122 |
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| C111 |
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R124 |
| LSI101 |
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R108 | C109 | R107 | C108 |
| C107 | C105 |
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R106 |
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B |
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E | Q101 |
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D102
R104 | C104 | 125 | C102 |
C106 |
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75
IC101
J101
L101
R101
D101
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L102 | LED101 |
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C103 |
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JA |
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No. 3
No.
13 | JA | 1 | 1 | D105 | D106 | D107 |
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D108 D109 D110 D111 D112
A 50ns
1
Px10
CH1 ˜ 1V
1Clock pulse COSI
13 | R102 |
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195 
A 2ms | A 2ms | A 2ms |
2
CH1 4 | CH1 6 | CH1 |
CH1
3 |
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| CH2 5 |
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| CH2 |
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Px10 | Px10 |
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| Px10 | Px10 | ||||
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| ˜ | ˜ |
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CH1 5V | CH2 5V |
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| CH1 . 1V | CH2 . 1V |
| CH1 . 1V CH2 . 5V | |||||||
2 Key scan signal KO0 | 4 | Sound signal output | 6 | Power amp input |
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| AN8053N pin 6 |
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3 Key scan signal KO1 | 5 | Filter output |
| 7 | Power amp output | ||||||
| Emitter of Q101 |
| AN8053N pin 1 |
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Tone: Flute
Key: A4
Volume: Maximum
— 5 —
