Casio SA-65 Service Manual
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SA-65
ON
OFF
TEMPO
VOLUME
POWER
START/STOP
MELODY OFF
ELECTRONIC KEYBOARD
MUSICAL INFORMATION SYSTEM
7
8
9
VOLUME
TONE
TEMPO
4
5
6
TONE
PATTERN
1
2
3
PATTERN
SONG BANK
SONG
0
BANK
10 SONG BANK
SA-65

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Summary of Contents for Casio SA-65

  • Page 1 SA-65 MUSICAL INFORMATION SYSTEM VOLUME TONE TEMPO TONE PATTERN 10 SONG BANK PATTERN SONG BANK SONG BANK TEMPO VOLUME POWER START/STOP MELODY OFF SA-65 ELECTRONIC KEYBOARD...
  • Page 2: Table Of Contents

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

    SPECIFICATIONS GENERAL Keyboard: 37 keys, 3 octaves (mini-size) Polyphony: 4 notes maximum Tones: Patterns: 30 (RHYTHM, FREE SESSION, FUNNY) Song band: 10 tunes; melody off Tuning: Fixed; A4 = approx. 442 Hz Speakers: Two; 8.0cm (output: 0.5 W + 0.5 W) Input terminals: AC adaptor (7.5 V DC) Power supply:...
  • Page 4: Block Diagram

    BLOCK DIAGRAM KO0 ~ KO7 S1 ~ S14 COM1, COM2 S18 ~ S20 S31 ~ S46 LCD Driver KS0035 KO8 ~ KO11 MSM6387B-A28 IC102 KI0 ~ KI7 LSI101 Filter Amplifier Keyboard Q101 AN8053N IC101 Speaker Switches Oscillator Q102, X101 CIRCUIT DESCRIPTION Key Matrix Tempo Melody...
  • Page 5 CPU (LSI101: MSM6387B-A28) Containing a sound data ROM and a DAC (Digital to Analog Convertor), the CPU provides sound waveform in accodance with the pressed key and the selected tone. The following table shows the pin functions of LSI101. Pin No. Terminal In/Out Function...
  • Page 6: Filter Block

    Filter Block Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform. AVDD Q101 2SC1740SR R106 From CPU C106 R105 To power amp. Amplifier/Voltage Regulator (IC101: AN8053N) CONT VREG NC PRE GND The right figure shows the internal block of IC101.
  • Page 7: Waveforms

    WAVEFORMS 1 Main clock COSI 2 Key scan signal KO0 4 Sound waveform 5 Clock for LCD driver MSM6387B-A28 pin 8 MSM6387B-A28 pin 30 MSM6387B-A28 pin 5 KS0035 pin 55 3 Key scan signal KO1 MSM6387B-A28 pin 29 Tone : Flute (No. 23) Volume : 5 (Max.) 6 Chip enable signal KO9 (CE) 8 Display data KO11 (DATA)
  • Page 8: Printed Circuit Board

    PRINTED CIRCUIT BOARD Main PCB JCM548-MA1M — 6 —...
  • Page 9: Schematic Diagrams

    SCHEMATIC DIAGRAMS Main PCB JCM548-MA1M — 7 —...
  • Page 10 Keyboard PCB JCM548-KY1M — 8 —...
  • Page 11: Exploded View

    EXPLODED VIEW — 9 —...
  • Page 12: Parts List

    PARTS LIST SA-65 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 13 Item Code No. Parts Name Specification Electrical Parts 6926 1200 PCB/ASSY (MA1M) M140578*1 LSI1 2012 5610 LSI/MC (CPU) MSM6387B-A28 IC101 2114 3269 IC/LINEAR (AMP) AN8053N IC102 2114 5793 IC/MOS (LCD DRIVER) KS0035 Q101 2220 1409 TRANSISTOR 2SC1740SR-TP-T Q102 2220 1387 TRANSISTOR 2SC1740SQ-TP-T D101 2390 3018 DIODE...
  • Page 14 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160, Japan Telephone: 03-3347-4926 MA0600571A...

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