Casio Electronic Keyboard Users Manual S/M CTK 431
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2015-01-21
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CTK-431 PHONES/ OUTPUT DC 9V IN MIDI OUT TONE RHYTHM SONG BANK STATUS TEMPO MAIN VOLUME MUSICAL INFORMATION SYSTEM POWER/MODE ON 100 SONG BANK KEYBOARD MUSICAL INFORMATION SYSTEM SONG BANK CONTROLLER MAIN SYNCHRO/ START/ VOLUME FILL-IN STOP SONG BANK CONTROLLER TEMPO CHORD BOOK FINGERED CASIO CHORD NORMAL OFF ACCOMP VOLUME M m 7 M7 dim 0 1 2 3 4 5 6 7 8 9 aug sus4 -5 add9 CLEAR TONE SONG BANK REW STOP LEFT ON/OFF RHYTHM TRANSPOSE/ TUNE/MIDI FF RIGHT ON/OFF PLAY/PAUSE CTK-431 INDEX ELECTRONIC KEYBOARD CONTENTS Specifications ................................................................................................................................... 1 Block Diagram .................................................................................................................................. 2 Circuit Description ............................................................................................................................ 3 Adjustment ....................................................................................................................................... 7 Major Waveforms ............................................................................................................................. 8 Printed Circuit Boards ...................................................................................................................... 9 Schematic Diagrams ...................................................................................................................... 10 Exploded View ............................................................................................................................... 14 Parts List ........................................................................................................................................ 15 SPECIFICATIONS GENERAL Keyboard: Tones: Polyphony: Auto accompaniment Rhythm patterns: Tempo: Chords: Rhythm controller: Accomp volume: Song bank Tunes: Controllers: Musical dictionary Name display: Tempo: Chord: Fingering: Song bank status: Staff: Keyboard: MIDI: Other functions Transpose: Tuning: Volume: Terminals MIDI terminals: Phones/Output terminal: Power supply terminal: Power supply Batteries: Battery life: AC adaptor: Auto power off: Speaker output: Power consumption: Dimensions (HWD): Weight: 49 standard-size keys, 4 octaves 100 12 notes maximum (6 for certain tones) 100 Variable (236 steps, = 20 to 255) 2 fingering methods (CASIO CHORD, FINGERED) START/STOP, SYNCHRO/FILL-IN 0 to 9 (10 steps) 100 PLAY/PAUSE, STOP, REW, FF, LEFT ON/OFF, RIGHT ON/OFF TONE, RHYTHM, SONG BANK name/number, keyboard settings name/value Tempo value, metronome, synchro standby, beat indicator Chord name, Chord form Fingering indicators, parts, pedal (The pedal indicator is for received MIDI data only.) PLAY, PAUSE, REW, FF 4 octaves with sharp and flat indications 4 octaves 5 multi-timbre receive 12 steps (–6 semitones to +5 semitones) Variable (A4 = approximately 440 Hz ± 50 cents) 0 to 9 (10 steps) IN, OUT Stereo standard jack (Output is monaural.) Output Impedance: 60 Ω Output Voltage: 5 V (RMS) MAX 9 V DC Dual power supply system 6 AA-size batteries Approximately 2 hours (SUM-3/R6P)/4 hours (AM3/LR6) AD-5 Turns power off approximately six minutes after last key operation. Can be disabled manually. 3.0 W (Output is monaural.) 9 V --- 7.5 W 958 × 310 × 132 mm (37-3/4 × 12-3/16 × 5-3/16 inches) Approximately 3.5 kg (7.7 lbs) (without batteries) ELECTRICAL Current drain with 9 V DC: No sound output Maximum volume with 12 keys C1 to B1 pressed in Synth-Lead 1 Volume: 9 (Max.) Phone output level (Vrms with 8 Ω load each channel): with key A4 pressed in Synth-Lead 1 Speaker output level (Vrms with 4 Ω load each channel): with key C4 pressed in Synth-Lead 1 Output level (Vrms with 47 KΩ load each channel): with key C1 pressed in Synth-Lead 1 Minimum operating voltage: —1— 200 mA ± 20 % 750 mA ± 20 % 95 mV ± 20 % 1050 mV ± 20 % 1100 mV ± 20 % 5.7 V BLOCK DIAGRAM COM1 ~ COM16 LCD Driver KS0066U-10B LSI3 LCD Buttons Keyboard SEG1 ~ SEG40 DB4 ~ DB7 Phones/Output Speaker (L) RS R/W E KO8 ~ KO12 KI0 ~ KI6 —2— Power Amp. LA4598 IC101 Speaker (R) KO0 ~ KO7 Filter Q105 VC VCC DVDD AVDD CPU MSM 6755C-17 LSI1 MD0 ~ MD7 APO DC + 9 V IN MA0 ~ MA17 Power Supply Circuit Q101 ~ Q103, D104 Power Switch Reset IC IC1 Oscillator X1, Q1 ROM(2M-bit) UM23C2101M 7384/Q LSI2 CIRCUIT DESCRIPTION KEY MATRIX KI0 KI1 KI2 KI3 KI4 KI5 KI6 KO0 C2 G#2 E3 C4 G#4 E5 C6 KO1 C#2 A2 F3 C#4 A4 F5 KO2 D2 A#2 F#3 D4 A#4 F#5 KO3 D#2 B2 G3 D#4 B4 G5 KO4 E2 C3 G#3 E4 C5 G#5 KO5 F2 C#3 A3 F4 C#5 A5 KO6 F#2 D3 A#3 F#4 D5 A#5 KO7 G2 D#3 B3 G4 D#5 B5 KO8 — + 0 Tempo Down Tempo Up Volume Down Volume Up KO9 3 2 1 Start/ Stop Synchro/ Fill-in Chord Book Accomp Volume KO10 6 5 4 Transpose/ Tune Song Bank Rhythm Tone KO11 9 8 7 Chord Fingered CASIO Normal Power Off KO12 FF Right Play/ Pause Stop Left Rewind NOMENCLATURE OF KEYS C#2 D#2 C2 D2 E2 F#2 G#2 F2 G2 A#2 A2 B2 C#3 D#3 C3 D3 E3 F#3 G#3 F3 G3 A#3 A3 C#4 D#4 B3 C4 D4 —3— F#4 G#4 E4 F4 G4 A#4 A4 C#5 D#5 B4 C5 D5 F#5 G#5 E5 F5 G5 A#5 A5 B5 C6 CPU (LSI1: MSM6755C-17) The CPU reads sound data from the ROM in accordance with the pressed key and the selected tone; the CPU can read rhythm data simultaneously when a rhythm pattern is selected. Then it provides the left and the right channels’ waveforms separately, by converting the data into the waveforms with two built-in DACs. The CPU also controls key and button input. The following table shows the pin functions of LSI1. Pin No. Terminal In/Out Function 1 MA14 Out Address bus 2, 3 NCO — Not used 4 ~ 19 MA0 ~ MA13 Out Address bus 13 MRDB Out Read enable signal 17 MCSB — Not used 20 ~ 27 MD0 ~ MD7 In/Out Data bus 28, 29 NC1, NC2 — Not used 30 DGND In Ground (0 V) source 31 DVCC In +5 V source 32, 33 XTLO, XTLI In/Out 34 NC3 — Not used 35 RSTB In Reset signal input 36 P24/RXD — MIDI signal input 37 P25/TXD — MIDI signal output 38 NMI In Power ON signal input. Connected to +5 V. 39 APO Out APO (Auto Power Off) signal output 40 NC4 — Not used 41 REFH Out Terminal for the internal DAC 42, 43 NC5, NC6 — Not used 44 DAOR Out 45 NC7 — Not used 46 AVdac In +5 V source for the internal DAC 47 DAOL Out Left channel sound waveform output 48 REFL Out Terminal for the internal DAC and ADC 49 AGdac In Ground source for internal DAC 50 AGadc In Ground source for internal ADC 51 ANI In Not used 52 AVadc In +5 V source for the internal ADC 53 NC8 — Not used 54 MOD0 In Mode selection terminal. Connected to +5 V. 55, 56 MOD1, MOD2 In Mode selection terminal. Connected to ground. 57 P40 — Not used 58 ~ 64 KI0/P30 ~ KI7/P36 In Terminals for key/button input signal 65 KI7/P37 — Not used 66 ~ 73 KO0/P50 ~ KO7/P57 Out Terminals for key scan signal 20 MHz clock input/output Sound waveform signal output —4— Pin No. Terminal In/Out Function 74 ~ 77 DB4 ~ DB7 Out 78 NC9 — Not used 79 LVCC In +5 V source 80 ~ 84 KO8 ~ KO12 Out Terminals for button scan signal 85 ~ 87 P65 ~ P67 — Not used 88 RS Out Control signal for the LCD driver 89 R/W Out Read/Write signal for the LCD driver 90 E Out Chip enable signal for the LCD driver 91 ~ 95 P73 ~ P77 — Not used 96 LGND In Ground source 97, 100 MA18, MA15 Out Data bus for the LCD driver Address bus LCD DRIVER (LSI3: KS0066U-10B) The LCD driver can drive a dot matrix LCD having 40 segment and 16 common lines. The LSI contains 240 graphic symbols in the built-in character generator ROM, and stores 80 characters in the built-in display data RAM. In accordance with command from the CPU, the LSI is capable of displaying up to 16 characters simultaneously. The following table shows the pin functions of LSI3. Pin No. Terminal In/Out Function 1 ~ 22, 63 ~ 80 SEG1 ~ SEG40 Out 23 VSS — 24, 25 OSC1, OSC2 In/Out 26 ~ 30 V1 ~ V5 In LCD drive voltage input. Those voltages are used for generating the stepped pulse of the LCD drive signals. 31, 32 LP, XCLS — Not used 33 VDD In DVDD (+5 V) source 34, 35 FR, DO — Not used 36 RS In Data/command determination terminal. High: data, Low: command 37 R/W In Read/Write terminal. High: read, Low: write 38 E In Chip enable signal. High: enable, the writing is done at fall edge. Low: disenable 39 ~ 42 DB0 ~ DB3 — Not used. Connected to GND (0 V) 43 ~ 46 DB4 ~ DB7 In/Out 47 ~ 62 COM1 ~ COM16 Out Segment signal output GND (0 V) source Terminals for the built-in clock pulse generator. The external resistor connected determines the oscillation frequency. Data bus Common signal/output —5— FILTER BLOCK Since the sound signals from the CPU is stepped waveforms, the filter block is added to smooth the waveforms. Amp. LA4598 Filter Block CPU MSM6755C-17 POWER AMPLIFIER (IC101: LA4598) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC101. Pin No. Terminal In/Out Function 1 Power GND In Ground (0 V) source 2 Ch1 B.S. — Terminal for a bootstrap capacitor 3 Ch1 OUT Out 4 VCC In +9 V source 5 Ch1 N.F. In Negative feedback input 6 Ch1 IN In Channel 1 output 7 D.C — Terminal for a bootstrap capacitor 8 Pre GND In Ground (0 V) source 9 Stand by In Power control signal input. 0 V:Off, +9 V: On 10 Ch2 IN In Not used. Connected to ground (0 V) 11 Ch2 N.F. In Negative feedback input 12 Ch2 OUT Out 13 Ch2 B.S. — Terminal for a bootstrap capacitor 14 NC — Not used Channel 1 output Channel 2 output —6— ADJUSTMENT MAIN PCB 1) Items to be adjusted: Item Measuring Instrument Vop voltage setting Voltmeter 2) Adjustment and Test Point Locations (TOP VIEW) (BOTTOM VIEW) VR1 TP1 3) Equipment connection/Procedure Vop voltage setting Set Voltmeter Output TP1 Input Connection Input Point Input Signal Adjust VR1 Output Connection Output Point Voltmeter TP1 Adjust for Adjust for 4.1 ~ 4.0 V reading on voltmeter under the temparature 20 ~ 25 °C. Make fine adjustment according to the following instruction. Eye Watching the LCD at a 36.6° angle to the horizontal, adjust Vop voltage so that unenergized segments are seen dimly. 36.6° LCD —7— MAJOR WAVEFORMS 1 2 3 1 Clock pulse MSM6755C-17 pin 32 4 2 +5 V source DVDD JB connector pin 4 3 APO signal JB connector pin 8 6 5 7 6 LCD common signal COM9 KS0066U-10B pin 55 7 LCD common signal COM10 KS0066U-10B pin 56 4 Button scan signal KO6 JA connector pin 14 5 Button scan signal KO7 JA connector pin 15 —8— PRINTED CIRCUIT BOARDS Main PCB JCM444-MA1M 1 2 4 3 5 6 7 Top View Bottom View —9— SCHEMATIC DIAGRAMS Main PCB JCM444-MA1M 2 3 4 6 1 7 — 10 — 5 Sub PCBs JCM444-MA2M/MA3M — 11 — Keyboard PCBs JCM4911K-KY1M/KY2M — 12 — COM7 COM6 COM5 COM4 COM3 COM2 COM1 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG35 SEG36 SEG37 SEG38 SEG39 SEG40 COM7 COM6 COM5 COM4 COM3 COM2 COM1 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG35 SEG36 SEG37 SEG38 SEG39 SEG40 Common COM11 COM12 SEG39 SEG40 COM10 COM9 COM14 COM15 COM16 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 NC NC NC COM16 COM15 COM14 COM13 COM12 COM11 COM10 COM9 COM16 COM15 COM14 COM13 COM11 COM12 SEG39 SEG40 COM10 COM9 COM14 COM15 COM16 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 NC NC NC COM16 COM15 COM14 COM13 COM12 COM11 COM10 COM9 COM16 COM15 COM14 COM13 LCD Segment — 13 — EXPLODED VIEW 22 R-1 5 8 6 9 16 10 18 7 17 12 14 11 15 13 1 19 2 R-2 23 4 R-3 20 4 21 R-4 R-5 3 — 14 — PARTS LIST CTK-431 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 without prior notice. 2. As for spare parts order and supply, refer to the "GUIDEBOOK for Spare parts Supply", published seperately. 3. The numbers in item column correspond to the same numbers in drawing. — 15 — Item Code No. Part Name Main PCB 6926 7070 PCB/ASSY (MA1M) 2012 5603 LSI/MC (CPU) 2012 5611 LSI/MASK-ROM 2012 5935 LSI/LCD DRIVER 2012 1883 IC/MOS (RESET IC) 2252 1239 TRANSISTOR 2250 1162 TRANSISTOR 2775 0994 POTENTIOMETER 2590 2100 OSCILLATOR/CERAMIC Sub PCB 2 6927 5070 PCB/ASSY (MA2,3M) IC101 2114 2891 IC/LINEAR (POWER AMP) IC102 2252 1248 IC/POTOCUPPLER Q102 2250 1591 TRANSISTOR Q103~Q105 2250 1592 TRANSISTOR Q101 2250 1593 TRANSISTOR D101 2390 3021 DIODE/SHOTTKY D102 2390 3018 DIODE D104~D113 2390 1344 DIODE D103 2360 2044 DIODE/ZENER J101 3612 0665 JACK (PHONE) J102 3501 7049 JACK (POWER) J103 3501 4816 JACK (MIDI) Keyboard PCBs 3 6926 7050 PCB/ASSY D701 - D749 2301 0101 DIODE Mechanical Parts 4 3831 0665 SPEAKER 5 3335 6823 LCD 6 6926 7200 RUBBER/INTERCONNECTOR 7 6927 6040 SPACER/455A 8 6927 6050 SPACER/455B 9 6927 6060 FILM/LEXAN 10 6927 5060 EL 11 6909 5890 SWITCH/SLIDE KONB 12 6921 5031 KNOB 13 6927 6070 RUBBER/BUTTON 14 6927 6080 RUBBER/BUTTON 15 6927 6090 RUBBER/BUTTON 16 6927 6100 RUBBER/BUTTON 17 6922 2720 KEY SET/LT WHITE 18 6922 2730 KEY SET/LT WHITE 19 6922 2740 KEY SET/LT BLACK 10P 20 6926 0670 RUBBER/CONTACT 21 6926 0680 RUBBER/CONTACT 22 6906 9611 PANEL/DISPLAY 23 6925 4500 COVER/BATTERY Accessory 6906 8752 STAND/NOTE 1 LSI1 LSI2 LSI3 IC1 Q1,Q2 Q3 VR1 X1 Notes: Q – Quantity per unit R – Rank — 16 — Specification Q R M240832*1 MSM6755B-17 UM23C2101M-7384/Q KS0066U-10B RN5VD40AA-TR 2SC4081T106Q 2SA1576AT106R EVN-D8AA03B53 CSACS20.00MX040-TC 1 1 1 1 2 1 1 1 1 B A A A B B B B B M241005*1 LA4598 HCPL-261A 2SB1237TV2R 2SC1740STPR 2SD1858TV2R SRT14 1T2 1SS133T-77-T MTZJ6.2A-T77-T YKB21-5006 HEC2305-01-330 YKF51-5051 1 1 1 1 3 1 1 1 10 1 1 1 1 B A A A A A C C C A B B B M140749*1 1S2473T-77-T 1 C 49 B 10G42AFA LD-B10272E M440584-2 M440810-1 M440811-1 M440812-1 M340996*1 CSB-12D M311859-1 M240796-2 M240797-2 M240798-2 M240799-2 M312118*1 M312118*2 M111726-1 M240549-1 M240550-1 M340789-2 M340528*1 1 1 2 1 1 1 1 1 1 1 1 1 1 3 1 2 3 1 1 1 B B C C C C B B B B B B B A A A A A C B M340629B*2 1 B CASIO TECHNO CO.,LTD. Overseas Service Division Nishi-Shinjuku Kimuraya Bldg. 1F 5-25, Nishi-Shinjuku 7-Chome Shinjuku-ku, Tokyo 160-0023, Japan
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