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25 TONES
11 PIANO
12 ELEC PIANO
13 PIPE ORGAN
14 JAZZ ORGAN
15 ACCORDION
21 FLUTE
22 CLARINET
23 TRUMPET
24 HARMONICA
ANY-KEY PLAY
MODE
POWER OFF
PLAY
POPS
ROCK
8 BEAT
16 BEAT DISCO
SLOW ROCK
1
2
3
4
5
6
ELECTRONIC KEYBOARD
ML-3
SONG BANK
25 VIOLIN
44 CHURCH BELLS
1 FRÈRE JACQUES
31 BRASS ENS
45 BELLS
2 JOY TO THE WORLD
32 SYNTH-BRASS
51 SYNTH-REED
3 OLD MacDONALD HAD A FARM
33 STRINGS
52 WAW VOICE
4 TWINKLE TWINKLE LITTLE STAR
34 SYNTH-STRINGS
53 METAL LEAD
5 MINUET(J.S.BACH )
35 CHORUS
54 ROCK DRUM
6 LONDON BRIDGE
41 ELEC GUITAR
55 S.E.
7 MICHAEL
42 JAZZ GUITAR
8 MARY HAD A LITTLE LAMB
43 VIBRAPHONE
9 THE CAMPTOWN RACES
10 ODE TO JOY
DEMO
RHYTHM
TEMPO
SEL.
VOLUME
MELODY GUIDE
FUNK
SWING BOSSA NOVA
SAMBA
MARCH
WALTZ
7
10
8
9
1
2
3
4
5
TONE
STOP
LIGHT ON/OFF
1
10
RHYTHM
SONG
ML-3

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Summary of Contents for Casio ML-3

  • Page 1 ML-3 25 TONES SONG BANK 11 PIANO 25 VIOLIN 44 CHURCH BELLS 1 FRÈRE JACQUES 12 ELEC PIANO 31 BRASS ENS 45 BELLS 2 JOY TO THE WORLD 13 PIPE ORGAN 32 SYNTH-BRASS 51 SYNTH-REED 3 OLD MacDONALD HAD A FARM...
  • Page 2: Table Of Contents

    CONTENTS Specifications ........1 Block Diagram .
  • Page 3: Specifications

    SPECIFICATIONS General Number of Keys: Illuminated Keys: White and Black keys Polyphonic: 2-note Preset Tones: Auto-Rhythms: Demonstration Tunes: Lesson Functions: 3 modes; Demo, Any-Key Play, Melody Guide Built-In Speaker: 8.0 cm dia. 1.0 W Input Rating: 1 pce. Terminals: Mic. Jack [Input Impedance: 20 kΩ AC Adapter Jack (DC 7.5 V) Power Source: DC: 5 AA size dry batteries...
  • Page 4: Block Diagram

    BLOCK DIAGRAM Mic. input Illuminated Keyboard LX0~LX3 Mic. amp. LY0~LY7 T4, T5 LEDs KO0~KO11 Amplifier MSM6521-13 Filter AN8053N LSI1 Speaker KI0~KI7 VDD 5.6V AVDD 5.6V Oscillator Power Supply Circuit T1, D3 Switches Nomenclature of Keys F#3 G#3 A#3 C#4 D#4 F#4 G#4 A#4 C#5 D#5 F#5 G#5 A#5...
  • Page 5: Circuit Description

    CIRCUIT DESCRIPTION Key Matrix Volume Volume Light Down On/Off Rhythm Tempo Tone 1 Stop Down Rhythm Tempo Tone 2 Tone 3 Tone 4 Tone 5 Select Melody Any Key Demo Play Guide Play Keyboard LED Matrix — 3 —...
  • Page 6 CPU (LSI1: MSM6521-13) Containing a sound data ROM and a DAC (Digital to Analog Converter), the CPU provides sound waveform in accordance with the pressed key and selected tone. The CPU also drives LEDs in the illuminated keyboard directly. The following table shows the pin functions of LSI1. Pin No.
  • Page 7: Troubleshooting

    Power Supply Circuit The power supply circuit regulates a constant output voltage +5.6V by T1 and D4. VDD +5.6V 2SD1858Q,R Power Switch DC +7.5 V Input AVDD +5.6V TROUBLESHOOTING Nature of Trouble Faulty Block Checkpoint No power Power Supply Circuit Base of T1 should receive +6 V.
  • Page 8: Schematic Diagrams

    SCHEMATIC DIAGRAMS JCM605-KY1M — 6 —...
  • Page 9 JCM605-LD1M JCM605-LD2M — 7 —...
  • Page 10 JCM607-MA1M/MA2M — 8 —...
  • Page 11: Pcb View And Major Waveforms

    PCB VIEW AND MAJOR WAVEFORMS Key scan signal KO0 Sound signal output 5 Mic, amp. input MSM6521-13 pin39 MSM6521-13 pin29 Key scan signal KO7 Power amp output 6 Mic. amp. output MSM6521-13 pin46 AN8053N pin 1 T4 Emitter — 9 —...
  • Page 12: Exploded View

    EXPLODED VIEW — 10 —...
  • Page 13: Parts List

    PARTS LIST ML-3 Notes: This parts list does not include the cosmetic parts, which parts are marked with item No. "R-X" in the exploded view. Contact our spare parts department if you need these parts for refurbish. Prices and specifications are subject to change with- out prior notice.
  • Page 14 Item Code No. Parts Name Specification Main PCB 6922 8720 Main PCB ass'y M607MA1,2M M111832*1 LSI1 2011 8057 MSM6521-13 2114 3269 AN8053N 2253 0448 Transistor 2SD1858Q,R-TV6-T T2 - T5 2220 1387 Transistor 2SC1740SQ-TP-T 2390 0371 Diode DSK10B-BT-T 2390 1323 Diode RB100A-T32-T 2360 1519 Zener diode...
  • Page 15 MA0700361A...