Casio_PK-5_Service_Manual电路图.pdf

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1、ELECTRIONIC KEYBOARD PK-5 (without price) RadioFans.CN 收音机爱 好者资料库 INDEX CONTENTS Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Circuit Description

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 PCB View and Major Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Schematic Diagrams . . . . . . . . . . . . .

3、. . . . . . . . . . . . . . . . . . . . . . . 6 IC Lead Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Exploded Veiw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Parts List . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . 9 RadioFans.CN 收音机爱 好者资料库 1 SPECIFICATIONS General Number of Keys:32 Polyphonic:2-note Preset Tones:16 Auto-Rhythms:19;Rock 12, 16 Beat 12, Disco 13, Pops 13, Slow Rock, Swing March, Reggae, Tango, Samba, Bossa Nova, Beguine, Waltz Accompaniment Patterns:13;

5、Rock, Pops, Funk, Slow Rock, Latin, Jungle, Orient, Bagpiper, Fanfare, Childs Play, Classical, Computer, New Age Demonstration Tune:Classical Medley Built-In Speaker:6.5 cm dia. 0.5 W Input Rating: 1 pec. Power Source:4 AA size dry batteries Battery life: Approx. 3 hours (SUM-3/R6P) Approx. 6 hours

6、(AM-3/LR6) Power Consumption:0.7 W Dimentions:41 x 375 x 115 mm (HWD) (1-5/8 x 14-3/4 x 4-1/2 inches) (HWD) Weight:0.4 kg (0.9 lbs) excluding batteries Electrical Current Drain with 6V DC: No Sound Output 35 mA 20% Maximum Volume113 mA 20% with keys C4 and E4 pressed in Flute tone Volume: Maximum, A

7、ccmpaniment: Latin, Tempo: Maximum Minimum Operating Voltage: 5.0 V RadioFans.CN 收音机爱 好者资料库 BLOCK DIAGRAM Nomenclature of Keys F#3 G#3 A#3C#4 D#4F#4 G#4 A#4C#5 D#5F#5 G#5 A#5 F3G3A3B3C4D4E4F4G4A4B4C5D5E5F5G5A5B5C6 KO0KO6 KI0KI7 Keyboard Switches Oscillator X1 Amplifier AN8053N IC1 Speaker CPU MSM638

8、7-03 LSI1 2 CIRCUIT DESCRIPTION Key Matrix CPU (LSI1: MSM6387-03) Containing a sound data ROM and a DAC (Digital to Analog Convertor), the CPU provides sound wave- form in accordance with the pressed key and the selected tone. The following table shows the pin functions of LSI1. 3 KI0KI1KI2KI3KI4KI5

9、KI6KI7 KO0F3F#3G3G#3A3A#3B3C4 KO1C#4D4D#4E4F4F#4G4G#4 KO2A4A#4B4C5C#5D5D#5E5 KO3F5F#5G5G#5A5A#5B5C6 KO4Tone 0Tone 1Tone 2Tone 3Tone 4Select KO5Tone 5Tone 6Tone 7Tone 8Tone 9Stop KO6Demo Tempo Up Tempo Down Volume Up Volume Down Pin No.TerminalIn/ OutFunction 1, 2TEST1, TEST2Not used. Connected to gr

10、ound. 3RESETInPower ON reset input. On: +6 V Off: 0 V 4AVDDIn+5 V sorce for the built-in DAC 5OUTOutSound waveform output 6AGNDInGround (0 V) source for the built-in DAC 7GNDInGround (0 V) source 8, 9COSI, COSOIn/Out21.725 MHz clock pulse input/output 10VDDIn+5 V source 11 18KI0 KI7InInput terminal

11、from keys and switches 19 23KO11 KO7Not used. 24 30KO6 KO0OutKey and switch scan signal output Amplifier/Voltage Regulator (IC1: AN8053N) Consisting of an amplifier and a voltage regulator, AN8053N amplifies the sound signal from the CPU and also provides the CPU +5V source. The following figure sho

12、ws the internal block diagram of IC1. TROUBLESHOOTING 161514131211109 87654321 SP AMPVREF 5V REG POWER SPONCSP GNDPC-1PC-2SPISPMVREF VCCNCCONT 5V VREGNCNCNC PRE GND + - 4 Checkpoint Pin 13 should have +5 V. An amplified waveform should be observed at pin 1. Voltage at pin 3 of the CPU should be rais

13、ed from 0V to +5 V when the power switch is turned on. Switch contact. Pins 24 30 should provide pulses. Pin 5 should provide a sound waveform when a key is pressed. Pins 8 and 9 of the CPU should receive an oscil- lation signal. Nature of Trouble No sound at all Certain key(s) or switch(es) do(es)

14、not work. Faulty Block Power amp. (IC: AN8053N) Power Switch CPU (LSI1: MSM6387-03) Oscillator (X1) Key or Switch Contact Open Circuit on KO or KI Lines PCB VIEW and MAJOR WAVEFORMS M3205-MA1M PCB 5 2 1 3 45 Clock pulse COSO MSM6387-03 Pin 9 Key scan signal KO0 MSM6387-03 Pin 30 Key scan signal KO1

15、MSM6387-03 Pin 29 Sound output MSM6387-03 Pin 5 Tone : Piano Key : G4 Power Amp. output AN8053N Pin 1 Tone : Piano Key : G4 Volume : Max. 6 SCHEMATIC DIAGRAM 1 2 3 4 5 6.0 0.5 0.5 0.5 0.5 0.5 0.5 0.5 5.2 4.8 2.5 2.2 2.2 4.9 0.0 0.0 0.0 0.0 5.2 0.0 0.0 3.9 3.1 4.0 4.0 M3210-MA1M PCB LSI1: MSM6387-03

16、30 29 28 24 27 26 25 23 22 21 20 19 18 17 16 TEST2 TEST1 RESET GND AVDD OUT AGND COSI COSO VDD KI0 KI1 KI2 KI3 KI4 1 2 3 7 4 5 6 8 9 10 11 12 13 14 15 KO0 KO1 KO2 KO6 KO3 KO4 KO5 KO7 KO8 KO9 KO10 KO11 KI7 KI6 KI5 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 SPO NC SPG PC-1 PC-2 SPI SPM VREF VCC NC CONT VR

17、EG NC NC NC PR GND IC1: AN8053N IC LEAD IDENTIFICATION 7 EXPLODED VIEW 8 7 A 3 8 9 04 5 6 1 C 2 B D Notes: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 seperately. 3.The number

18、s in item column correspond to the same numbers in drawing. PARTS LIST PK-5 FOB Japan NItemCode No.Parts NameSpecificationQM N.R.YenR* Unit Price Electrical Parts C1/22807 1531 Electrolytic capacitor10RE3-470-T2-T2 20CA C3/42807 6392 Electrolytic capacitor10RE3-22-T2-T 2 20CA C52813 1771 Semiconduct

19、ive capacitorDD405SR393K16-T 1 10CA C62807 6378 Electrolytic capacitor50RE3-1-T2-T 1 20CA C72801 9100 Electrolytic capacitor6.3RE3-100-T2-T 1 20CA C82801 9660 Electrolytic capacitor6.3RE3-220-T2-T 1 20CA D12301 0241 Diode1SS254T-77-T 1 20CA FB1/23035 0266 Ferrite beadsBL02RN2-R62T4-T 2 10CA NIC12114

20、 3269 ICAN8053N 11AB LSI12010 8260 LSIMSM6387-03SS-10611AI R32606 1141 Carbon film resistorR-20-1K-J-T23-T 1 20CA R42606 1554 Carbon film resistorR-20-120K-J-T23-T 1 20CA R52606 1239 Carbon film resistorR-20-8.2K-J-T23-T 1 20CA R62606 1274 Carbon film resistorR-20-1.5K-J-T23-T 1 20CA R72606 1169 Car

21、bon film resistorR-20-100-J-T23-T 1 20CA X12590 0742 Ceramic oscillatorEFO-GC2175C3 11AB 4317 4031 Blank PCB M3205-MA1MM111705A-111CB 6917 1762 Battery spring (+)M410913B-11 20BA 6921 6211 Battery spring (-)M412171A-11 20BA 1PCB assy M3205-MA1MM211679*111B Mechanical Parts 23831 0525 SpeakerKUE-65RG

22、F02A 11BC 36909 7380 SL contact 09DCSB-09D1 20BA 46917 1571 White key set M210M210610A-1 15AB 56917 1580 Black key set M210M210609-1 1 10AA 66917 1591 Contact rubber M210M210605A-1 15BB 76917 1610 Slide knob 210M310807-11 20CA 86917 1630 Button 210AM310824-11 20BA 96917 1640 Button 210BM310825-11 10

23、BA N106917 1730 Button 210BM310825-215BB N11Top case 205BM111690-211C N12Bottom case 205BM111691-211C 13Screw2.2 x 63 20C 14Screw2.30 x 8 ZMC-36 20C The parts having a blank in their code No. column should be ordered from C.M.F.G. Notes: N New parts M Minimum order/supply quantity R Rank 9 8-11-10, Nishi-Shinjuku Shinjuku-ku, Tokyo 160, Japan Telephone: 03-3347-4926 May, 1994