Casio SK60 service manual
Contents
1. Number of keys 32 Polyphonic 12 note Preset tones 18 Human voice tones 12 Voice cycles 6 Song bank 24 tune Free sessions 12 Pads 4 Pad settings Sampled sounds effects voice percussion Sampling method 8 bit Differential Pulse Coded Modulation DPCM Sampling rate 13 021 kHz Sampling duration 2 4 seconds maximum Tuning control Approx 440 Hz Built in speakers 4 inch dia 2 W input rating 2 pcs Terminals 7 5 V DC Power source 2 way AC or DC source AC AC adapter DC 5 AA size dry batteries Power consumption 2 0 W Dimensions HWD 416 222 530 mm 16 3 8 8 6 8 20 7 8 inches Weight 1 0 kg 2 2 lbs excluding batteries ELECTRICAL Current drain with 7 5 V DC No sound output 50 mA 20 Maximum volume 200 mA 20 with white keys F4 to C6 pressed in Bah tone No 44 Power off 80 A maximum Speaker output level Vrms with 4 load with key C4 pressed in Accordion tone 480 mV 20 Volume maximum Minimum operating voltage 5 8 V 3 CPU LSI1 MSM6755B 10 Keyboard Buttons PG Q1 X1 Reset IC IC1 RE5VL40AA Q103 Voltage Regulator Q101 Q102 D102 Mic Amp Q105 Q106 Mic input VCC DVDD AVDD Power Supply Circuit APO MD0 MD7 MA0 MA14 RAM 256 Kbit LSI2 HM62256BLSP 8 KI0 KI3 KO0 KO7 KI4 KI7 Amp Voltage Regulator IC101 AN8053N BLOCK DIAGRAM 4 KI0 KI1 KI2 KI3 KI4 KI5 KI6 KI2. 3 1 B 12 6925 4620 Battery cover M311200 13 1 B Notes Q Used quantity R Rank 13 MA0700761A
3. 7 KO0 SO0 F3 C 4 A4 F5 A 1 1 Song KO1 SO1 F 3 D4 A 4 F 5 B 2 2 Start Stop KO2 SO2 G3 D 4 B4 G5 C 3 3 Melody On Off KO3 SO3 G 3 E4 C5 G 5 D 4 4 Tone KO4 SO4 A3 F4 C 5 A5 Volume Up Magical Singer 5 KO5 SO5 A 3 F 4 D5 A 5 Volume Down Sampling 6 KO6 SO6 B3 G4 D 5 B5 Tempo Up Edit Effect KO7 SO7 C4 G 4 E5 C6 Tempo Down CIRCUIT DESCRIPTION KEY MATRIX NOMENCLATURE OF KEYS F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5 C6 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 5 Pin No Terminal In Out Function 1 MA14 Out Address bus 2 MWEB Out Write enable signal output 3 NC0 Not used 4 19 MA0 MA13 Out Address bus 13 MRDB Out Read enable signal output 17 MCSB Out Chip select signal for the RAM 20 27 MD0 MD7 In Out Data bus 28 29 NC1 NC2 Not used 30 DGND In Ground source 31 DVCC In 5 V source 32 33 XTL0 XTL1 In Out 20 MHz clock input output 34 NC3 Not used 35 RSTB In Reset signal input 36 RXD Not used Connected to 5 V 37 TXD Not used 38 NMI In Power ON signal input 39 APO Out APO Auto Power Off signal output 40 NC4 Not used 41 REFH Out Terminal for the built in DAC ADC 42 43 NC5 NC6 Not used 44 DAOR Out Sound waveform output 45 NC7 Not used 46 AVdac In 5 V source for the buil
4. ELECTRIONIC KEYBOARD SK 60 SK 60 MELODY ON OFF TIME S M L 1 2 3 1 2 3 4 1 2 CYCLE REVERSE CLEAR RELEASE EFFECT LOOP TUNE RESET 36 TONES 12 FREE SESSIONS 11 12 13 14 15 16 21 22 23 24 25 26 31 52 53 54 55 56 61 62 63 64 65 66 32 33 34 35 36 41 42 43 44 45 46 51 11 12 13 14 15 16 21 22 23 24 25 26 31 32 33 34 35 36 41 42 43 44 45 46 51 52 53 54 55 56 61 62 63 64 65 66 POPS 1 BIG BAND SWING FOX TROT POPS 2 WALTZ 1 WALTZ 2 POLKA SKA TEX MEX COUNTRY BAROQUE MARY HAD A LITTLE LAMB AMAZING GRACE ACH DU LIEBER AUGUSTIN LONDON BRIDGE JOY TO THE WORLD GREENSLEEVES JINGLE BELLS SILENT NIGHT O CHRISTMAS TREE YANKEE DOODLE SANTA LUCIA MARCH FROM THE NUTCRACKER VOICES OF REASON ORIGINAL SONG TWINKLE TWINKLE LITTLE STAR DOOIN MY THING ORIGINAL SONG ODE TO JOY LITTLE BROWN JUG SPRING FROM THE FOUR SEASONS WHEN THE SAINTS GO MARCHING IN FR RE JACQUES OLD MacDONALD HAD A FARM AULD LANG SYNE LONDONDERRY AIR ROW ROW ROW YOUR BOAT DOO1 MALE DOO2 MALE BAH BASS BOM BASS VOICE PERCUSSION DOO BEE BOM BAH DOO BEE DEE DOO BEE BAH DOO BEE DEE BAH DOO BEE DOO BAH SIREN 2 TELEPHONE SPACE 1 SPACE 2 FUNNY DOO FEMALE BEE FEMALE DEE FEMALE BAH FEMALE AHH CHOIR OOH CHOIR LA CHILDREN PIANO ELEC PIANO ORGAN ACCORDION GUITAR VIBRAPHONE VIOLIN STRINGS TRUMPET CLAR
5. INET SAX FLUTE SIREN 1 HUMAN VOICE HUMAN VOICE CYCLE 36 SONG BANK 24 SONGS POWER ON OFF VOLUME TEMPO TONE SONG BANK START STOP MAGICAL SINGER PAD EFFECT SAMPLE EDIT SAMPLING PAD A C B D S A M P L I N G M I C 1 2 3 4 5 6 1 2 3 4 2 CONTENTS Specifications 2 Block Diagram 3 Circuit Description 4 Major Waveforms 7 Printed Circuit Board 8 Schematic Diagrams 9 Exploded View 11 Parts List 13 SPECIFICATIONS GENERAL
6. WER SUPPLY CIRCUIT The power supply circuit generates two voltages DVDD 5 V and AVDD 5 V DVDD 5 V is always generated but AVDD 5 V is controlled by APO signal output from the CPU OSCILLATOR 5 V source of the oscillator is controlled by transistor Q107 When selecting the power switch at on position transistor Q107 turns on to become 20 MHz oscillation on To keep the oscillation on the CPU provides H of APO signal 7 MAJOR WAVEFORMS 1 Clock pulse MSM6755B 10 pin 32 2 Key scan signal KO6 MSM6755B 10 pin 72 3 Key scan signal KO7 MSM6755B 10 pin 73 1 2 3 4 Sound waveform MSM6755B 10 pin 44 5 Mic amp input Terminal PM BL 6 Mic amp output MSM6755B 10 pin 51 4 5 6 Tone No 22 Key A4 8 2 1 4 6 3 5 PRINTED CIRCUIT BOARD Main PCB KDM415 MA1M 9 1 2 3 4 5 6 SCHEMATIC DIAGRAMS Main PCB KDM415 MA1M KY2M 10 Keyboard PCB KDM415 KY1M EXPLODED VIEW 11 3 4 7 8 10 11 12 9 1 2 5 6 R 1 R 3 R 2 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 1 Prices and specifications are subject to change with out prior notice 2 As for spare parts order and supply refer to the GUIDEBOOK for Spare parts Supply published
7. seperately 3 The numbers in item column correspond to the same numbers in drawing PARTS LIST SK 60 Item Code No Parts Name Specification Q R Main PCB 1 6925 4540 Main PCB ass y M415 MA1M M140426 1 1 B LSI1 2012 3738 LSI CPU MSM6755B 10 1 A LSI2 2012 3731 LSI RAM HM62256BLSP 8 1 A IC1 2105 5922 IC RE5VL40AA TZ 1 A IC101 2114 3269 IC AN8053N 1 A 2220 1387 Transistor 2SC1740SQ TP T 5 A Q102 2251 0469 Transistor 2SB1237Q R TV6 T 1 A Q107 2200 2449 Transistor 2SA933SQ TP T 1 A D1 2390 2828 Diode RB441Q 40T 77 1 B D101 2360 1554 Diode Zener MTZJ5 1B T77 T 1 B D102 2360 1085 Diode Zener HZS6B1LTD T 1 B D103 2390 1323 Diode RB100A T32 T 1 C D104 2390 0371 Diode DSK10B BT T 1 C 2390 1344 Diode 1SS133T 77 T 20 C LED101 2370 1106 LED MPR3338S B99 1 C X1 2590 1526 Creamic oscillator EFO EN2005C4 1 B J101 3501 3780 Jack Power HEC2305 01 250 1 B Keyboard PCBs 2 6925 4550 Keyboard PCB ass y M415KY1 2M M140427 1 1 B 2390 1344 Diode 1SS133T 77 T 32 C Mechanical Parts 3 3831 1064 Speaker S08JA32A 1 B 4 6909 5890 Slide contact CSB 12D 1 B 5 3830 9021 Microphone WM 034CY 1 B 6 6925 4560 Rubber button M240409 1 1 B 7 6925 4570 Rubber button M240410 1 1 B 8 6925 4580 Black key set LNM32 M110553 4 1 A 9 6925 4590 White key set NM32 B M140416 1 1 A 10 6925 4600 Key contact rubber M240448 1 1 A 11 6925 4610 Slide knob M311360
8. t in DAC ADC 47 DAOL Not used 48 REFL Out Terminal for the built in DAC ADC 49 AGdac Not used 50 AGadc In Ground source for the built in ADC 51 ANI In Analog signal input 52 AVadc In 5 V source for the built in ADC 53 NC8 Not used 54 MOD0 In Mode selection terminal 55 56 MOD1 MOD2 In Mode selection terminal 57 P40 In APO cancellation signal input 58 65 KI0 KI7 In Terminals for key button input signal 66 73 KO1 KO8 Out Terminals for key scan signal 74 78 Not used 79 LVCC In 5 V source 80 95 Not used 96 LGND In Ground source 97 100 Not used CPU LSI1 MSM6755B 10 Containing a sound data ROM and a DAC Digital to Analog Convertor the CPU provides sound waveform in accordance with the pressed key and the selected tone The CPU also records the voice picked up the microphone using the built in ADC Analog to Digital Convertor and the RAM The following table shows the pin functions of LSI1 6 Oscillator 20 MHz CPU APO DVDD DVDD From power switch SWITCH OFF ON 5 V 5 V 0 V APO L H 7 5 V 0 V AMPLIFIER VOLTAGE REGULATOR IC101 AN8053N The right figure shows the internal block of IC 101 16 9 SP AMP VREF 5V REG POWER 1 3 4 5 6 7 8 2 15 14 13 12 11 10 VCC NC CONT 5 V VREG NC NC NC PRE GND SPO NC SP GND PC 1 PC 2 SPI SPM VREF PO
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