Casio Cosmo CZ-1 Guide

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
3-A5
23-A7
3-A9
43-A11
53-A13
3-B1
73-B3
83-B5
91-117
10
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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