Casio CTK-555L Manual do Utilizador descarregar pdf (Página 15)

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MAJOR WAVEFORMS

1 NMI signal

JD connector pin 1

2 APO signal

JH connector pin 6

5 Key scan signal KC0

JA connector pin 9

6 Key scan signal KC1

JA connector pin 10

3 Button scan signal PA0

JD connector pin 9

4 Button scan signal PA1

JD connector pin 8

9 DAC output (L-ch)

JH connector pin 9

0 DAC output (R-ch)

JH connector pin 8

A Sound signal (L-ch)

JK connector pin 4

B Sound signal (R-ch)

JK connector pin 5

7 RS signal PA4

JJ connector pin 4

8 R/W signal PA5

JJ connector pin 5

CH1

CH2

CH1

CH2

CH1

CH2

CH1

CH2

CH1

CH2

CH1

CH2

0.5 s

20 ms

50 µs

0.5 s

1 ms

CH1: 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 ON

Power ON

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 29 30

ELECTRONIC KEYBOARD 1
CONTENTS 2
SPECIFICATIONS 3
ELECTRICAL 4
About General MIDI 4
BLOCK DIAGRAM 5
CIRCUIT DESCRIPTION 6
POWER SUPPLY CIRCUIT 7
NOMENCLATURE OF KEYS 7
RESET CIRCUIT 7
CPU (LSI1: GT913F-(T)) 8
FILTER BLOCK 11
DAC (IC1: UPD6379GR) 11
ADJUSTMENT 13
Set Voltmeter 14
MAJOR WAVEFORMS 15
PRINTED CIRCUIT BOARDS 16
Sub PCB KDM454-MA2M 17
LCD PCB JCM454-LCD1M-A 18
SCHEMATIC DIAGRAMS 19
Display PCB JCM454-LCD1M 21
EXPLODED VIEW 26
PARTS LIST 27
PARTS PRICE LIST 28
Notes : Q-Quantity per unit 28
CASIO TECHNO CO.,LTD 30

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Casio CTK-555L Manual do Utilizador Página 15

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