Casio Cosmo CZ-1 Guida

irvice Manual

IFARTS LIST

ELECTRONIC KEYBOARD

CZ-1

CAUTION:

When the connector o(from the lithium battery) it disconnected, all the sound data in tha

Mamory Bank ara claarad. Whan this happens, initialize tha unit by tha following procedures.

1. Turn the power switch off and press INITIALIZE button.

2. Turn the power switch on, then the display indicates;

SYSTEM ALL

INITIflLIZE<Y/N>?

3. Whila pushing INITIALIZE button, prat* YES button on tha data antry taction of tha panal.

All tha Mamory Bank data ara initialized, than tha display show*:

SYSTEM

INITIALIZED !

CONTENTS

CZ-1 Servica Manual

1. SCHEMATIC DIAGRAM

M. Main PCB (A) M5154-MA1M, IF

1-2. Main PCB 'i) M5154-MA1M

1-3. Starao Chorus Circuit PCB M6154-MA2M

14. MIDI Control 8t Amp. Block PCB M5154-MA3M. AS1M

1-6. LEO Driva Circuit PCB M5154-MA4M

1-6. Powar Supply Circuit PCB M5154-PS1, P&2M

1-7. Par*IBIockPCB(A)M5154^N1M,CN3M

14. Panal Block PCB (B) M5154-CN2M

19. Kayboard PCB M571KY1M, KY3M. M5177KY2M

2. WIRING DIAGRAM

3. PCB VIEW &MAJOR CHECKPOINTS

3-1. PCBMS154-MA1M

32. PCB M5154-MA2M

4. MAJOR WAVEFORMS

5. BLOCK DIAGRAM

6. DIGITAL CIRCUIT BLOCK DIAGRAM

7. CPU GiPD7810H)

7-1. Pin Functions of Main CPU

7-2. Pin Functions of Sub CPU

8. MAIN RAM &ROM ACCESSES

9. SUB RAMs Si ROM ACCESSES

10. CPU INTERFACE LSI (MB64H173)

10-1. Function of Each Block 24 3-C13

10-2. Data Transfar Procedures 25 3-C14

10-3. Switch Matrix 29 3-D4

11. KEYBOARD

11-1. Kay Touch Spaed Detection 30 3-D5

11-2. Key Matrix 31 3-D6

11*3. Pin Functions of Key Touch Control LSI (MSM6200) 32 3-D7

11-4. Pin Functions of Key ln;wface LSI (jiPD8049HC) 32 3-D7

11-5. Key Touch Data Communication 33 3-D8

11-6. After Touch Control Circuit 35 3-D10

12. DATA CLOCK PULSE GENERATOR 36 3-D11

13. LED DRIVING CIRCUITS 37 3-D12

14. ANALOG CIRCUIT BLOCK DIAGRAM 39 3-D14

18. MUSIC LSIs ACCESSES 41 3-E2

16. PIN FUNCTION OF MUSIC LSI 0iPD933AC) 42 3-E3

3-A5

23-A7

3-A9

43-A11

53-A13

3-B1

73-B3

83-B5

91-117

3-B11

3-B13

3-C1

3-C4

..17 3-C6

..18 3-C7

3-C8

3-C10

3-C11

(2-1 Service Manual

17. DAC (Jigital to Analog Converter) CIRCUIT 43 3-E4

18. EXPANDER CIRCUIT 44 3-E5

19. SAMPLF &HOLD CIRCUIT 46 3-E7

20. STEREO CHORUS CONTROL CIRCUITS

20-1. Block Diagram 47 3-E8

20-2. Signal Function 47 3-E8

20-3. Circuit Function. 48 3-E9

204. Line-out Circuit 48 3-E9

21. STEREO CHORUS CIRCUIT

2M. Block Diagram 53 3-E11

21 -2. Function of Each Block 51 3-E13

21 -3. Three-Phase LFO (Low Frequency Oscillator) 52 3-E14

21 4. VCO (Voltage Controlled Oscillator) 53 3-F1

2V5. BBD (Buckat Brigadt Device) 54 3-F2

21-6. Compressor and Expander Circuits 55 3-r"J

22. OUTPUT VOLUME CONTROL CIRCUIT 56 3-F4

23. RESET CIRCUIT 57 3-F5

24. MIDI INTERFACE CIRCUIT 58 3-F6

25. ADJUSTMENT

25-1. DAC Offset Voltage Adjustment 59 3-F7

25 2. VSS1 Voltage Adjustment (Power Source for MSM6200) 59 3-F7

25*3. LCD Brightness Adjustment 59 3-F7

254. After Touch Adjustment 59 3-F7

25-5. VCA Offset Voltage Adjustment 60 3-F8

25-6. BBD Adjustment 60 3-F8

25-7. Volume Adjustment 61 3-F9

Perte List 62 3-F10

Perte Diagrams 66 3-C11/13

Enlarge Schematics of H5154-MAIM, MA2M, MA3M, AS1M on Flche 4B1.B4.B7.B10

Operation Manual 4_Ci

Technical News Bulletin I85 V-A13

Preset Tone Data Fiche 5

System MIDI Exclusive Fiche 6

CZ-1

1. SCHEMATIC DIAGRAM

11. Main PCB (A) M5154 MA1M, IF

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CZ-1

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