Casio_CTK-401_Service_Manual电路图.pdf

ELECTRONIC KEYBOARD CTK-401 CTK-401 POWER/MODE FINGERED MAIN VOLUME SYNCHRO/ FILL-IN START/ STOPTEMPO CHORD BOOK M 01234 56789 m7M7dim augsus4-5add9CLEAR ACCOMP VOLUME CASIO CHORD ON OFF NORMAL 100 RHYTHMS 100 SONG BANK (00-49) TONESONG BANK REWSTOPFF 100 SONG BANK KEYBOARD MUSICAL INFORMATION SYSTEM SONG BANK CONTROLLER LEFT ON/OFF RIGHT ON/OFF PLAY/ PAUSETRANSPOSE/ TUNE RHYTHM S O N G B A N K C O N T R O L L E R 100 TONES 100 SONG BANK (50-99) TONE RHYTHM SONG BANK MUSICAL INFORMATION SYSTEM STATUS TEMPO VOLUME RadioFans.CN 收音机爱 好者资料库 CONTENTS Specifications. 1 Block Diagram. 2 Circuit Description. 3 Adjustment . 7 Major Waveforms . 8 Printed Circuit Boards . 9 Schematic Diagrams . 11 Exploded View . 15 Parts List . 17 RadioFans.CN 收音机爱 好者资料库 1 SPECIFICATIONS GENERAL Keyboard:49 standard-size keys, 4 octaves Tones:100 Polyphony:12 notes maximum (6 for certain tones) Auto accompaniment Rhythm patterns:100 Tempo:Variable (236 steps, = 20 to 255) Chords:2 fingering methods (CASIO CHORD, FINGERED) Rhythm controller:START/STOP, SYNCHRO/FILL-IN Accomp volume:0 to 9 (10 steps) Song bank Tunes:100 Controllers:PLAY/PAUSE, STOP, REW, FF, LEFT ON/OFF, RIGHT ON/OFF Musical dictionary Name display:TONE, RHYTHM, SONG BANK name/number Tempo:Tempo value, metronome, synchro standby, beat indicator Chord:Chord name, Chord form Fingering:Fingering indcators, parts Song bank status:PLAY, PAUSE, REW, FF, playing Staff:Four octaves with sharp and flat indications Keyboard:Four octaves Other functions Transpose:12 steps (6 semitones to +5 semitones) Tuning:Variable (A4 = approximately 440 Hz 50 cents) Volume:0 to 9 (10 steps) Terminals Phones/Output terminal:Stereo standard jack Output Impedance: 100 Output Voltage: 3.0 V (RMS) MAX Power supply terminal:9 V DC Power supplyDual power supply system Batteries:Six AA-size batteries Battery life:Approximately 2 hours (SUM-3/R6P)/6 hours (AM3/LR6) AC adaptor:AD-5 Auto power off:Turns power off approximately six minutes after last key operation. Enabled under battery power only, can be disabled manually. Speaker output:2.0 W + 2.0 W Power consumption:9 V - 7.0 W Dimensions (HWD):988 332 124 mm (38-15/16 13-1/16 4-7/8 inches) Weight:Approximately 3.5 kg (7.7 lbs) (without batteries) ELECTRICAL Current drain with 9 V DC: No sound output100 mA 20 % Maximum volume625 mA 20 % with 12 keys C4 to B4 pressed in Synth-Lead 1 Volume: 9 (Max.) Phone output level (Vrms with 8 load each channel): with key A4 pressed in Synth-Lead 167 mV 20 % Speaker output level (Vrms with 4 load each channel): with key A4 pressed in Synth-Lead 1900 mV 20 % Minimum operating voltage:5.7 V RadioFans.CN 收音机爱 好者资料库 2 BLOCK DIAGRAM CPU MSM 6755B-17 LSI1 KeyboardButtons LCD LCD Driver SED1278F0A LSI3 Reset IC IC1 Oscillator X1, Q1 Power Supply Circuit Q101 Q103, D104 Power Amp. TA8248K IC101 Filter (L) Q104 Filter (R) Q105 Output VCVCCDVDD APO MD0 MD7 MA0 MA17DC + 9 V IN DB4 DB7 COM1 COM16 SEG1 SEG40 RS R/W E KO8 KO12 KI0 KI6 KO0 KO7 ROM(2M-bit) UM23C2101M 7384/Q LSI2 3 CIRCUIT DESCRIPTION KEY MATRIX NOMENCLATURE OF KEYS KI0KI1KI2KI3KI4KI5KI6 KO0C2G#2E3C4G#4E5C6 KO1C#2A2F3C#4A4F5 KO2D2A#2F#3D4A#4F#5 KO3D#2B2G3D#4B4G5 KO4E2C3G#3E4C5G#5 KO5F2C#3A3F4C#5A5 KO6F#2D3A#3F#4D5A#5 KO7G2D#3B3G4D#5B5 KO8+0 Tempo Down Tempo Up Volume Down Volume Up KO9321 Start/ Stop Synchro/ Fill-in Chord Book Accomp Volume KO10654 Transpose/ Tune Song Bank RhythmTone KO11987Fingered CASIO Chord NormalPower Off KO12FFRight Play/ Pause StopLeftRewind C2 C#2D#2F#2 G#2A#2C#3D#3F#3 G#3A#3C#4D#4F#4 G#4A#4C#5D#5F#5 G#5A#5 D2E2F2G2A2B2C3D3E3F3G3A3B3C4D4E4F4G4A4B4C5D5E5F5G5A5B5C6 4 CPU (LSI1: MSM6755B-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.TerminalIn/OutFunction 1MA14OutAddress bus 2, 3NCONot used 4 19MA0 MA13OutAddress bus 13MRDBOutRead enable signal 17MCSBNot used 20 27MD0 MD7In/OutData bus 28, 29NC1, NC2Not used 30DGNDInGround (0 V) source 31DVCCIn +5 V source 32, 33XTLO, XTLIIn/Out20 MHz clock input/output 34NC3Not used 35RSTBInReset signal input 36P24/RXDNot used. Connected to +5 V. 37P25/TXDNot used 38NMIInPower ON signal input. Connected to +5 V. 39APOOutAPO (Auto Power Off) signal output 40NC4Not used 41REFHOutTerminal for the internal DAC 42, 43NC5, NC6Not used 44DAOROutRight channel sound waveform output 45NC7Not used 46AVdacIn+5 V source for the internal DAC 47DAOLOutLeft channel sound waveform output 48REFLOutTerminal for the internal DAC and ADC 49AGdacInGround source for internal DAC 50AGadcInGround source for internal ADC 51ANIInAPO cancellation signal 52AVadcIn+5 V source for the internal ADC 53NC8Not used 54MOD0InMode selection terminal. Connected to +5 V. 55, 56MOD1, MOD2InMode selection terminal. Connected to ground. 57P40Not used 58 64KI0/P30 KI7/P36InTerminals for key/button input signal 65KI7/P37Not used 66 73KO0/P50 KO7/P57OutTerminals for key scan signal 5 LCD DRIVER (LSI3: SED1278F0A) 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.TerminalIn/OutFunction 74 77DB4 DB7OutData bus for the LCD driver 78NC9Not used 79LVCCIn+5 V source 80 84KO8 KO12OutTerminals for button scan signal 85 87P65 P67Not used 88RSOutControl signal for the LCD driver 89R/WOutRead/Write signal for the LCD driver 90EOutChip enable signal for the LCD driver 91 95P73 P77Not used 96LGNDInGround source 97, 100MA18, MA15OutAddress bus Pin No.TerminalIn/OutFunction 1 22, 63 80 23VSSGND (0 V) source Terminals for the built-in clock pulse generator. The external resistor connected determines the oscillation frequency. LCD drive voltage input. 26 30V1 V5InThose voltages are used for generating the stepped pulse of the LCD drive signals. 31, 32LP, XCLSNot used 33VDDInDVDD (+5 V) source 34, 35FR, DONot used Data/command determination terminal. High: data, Low: command 37R/WInRead/Write terminal. High: read, Low: write Chip enable signal. 38EInHigh: enable, the writing is done at fall edge. Low: disenable 39 42DB0 DB3Not used. Connected to GND (0 V) 43 46DB4 DB7In/OutData bus 47 62COM1 COM16OutCommon signal/output SEG1 SEG40OutSegment signal output 24, 25OSC1, OSC2In/Out 36RSIn 6 FILTER BLOCK Since the sound signals from the CPU is stepped waveforms, the filter block is added to smooth the waveforms. POWER AMPLIFIER (IC101: TA8248K) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC101. Pin No.TerminalIn/OutFunction 1NCNot used 2B.S.2Terminal for a bootstrap capacitor 3OUT2OutChannel 2 output 4VCCIn+9 V source 5OUT1OutChannel 1 output 6B.S.1Terminal for a bootstrap capacitor 7Power GNDInGround (0 V) source 8Stand byInPower control signal input. 0 V: Off, +9 V: On 9DCTerminal for a decoupling capacitor 10NF1InNegative feedback input 11IN1InChannel 1 input 12IN2InChannel 2 input 13NF2InNegative feedback input 14, 15Pre GNDInGround (0 V) source Amp. TA8248K Filter Block CPU MSM6755B-17 7 3) Equipment connection/Procedure Vop voltage setting Input Connection Input Point Input Signal Adjust Output Connection Output Point Adjust for VR1VoltmeterV5Adjust for 4.3 0.1 V reading on voltmeter. Make fine adjustment accord- ing to the next instruction. 53.5 LCD Eye Watching the LCD at a 53.5 angle to the horizontal, adjust Vop voltage so that unenergized segments are seen dimly. ADJUSTMENT MAIN PCB 1) Items to be adjusted: 2) Adjustment and Test Point Locations (TOP VIEW) ItemMeasuring Instrument Vop voltage settingVoltmeter Test point Output SetVoltmeter V5 8 MAJOR WAVEFORMS 1 Clock pulse MSM6755B-17 pin 32 1 2 +5 V source DVDD JC connector pin 6 3 APO signal JC connector pin 5 2 3 4 Sound waveform (R-ch) Tone:Whistle JC connector pin 4Key:A4 5 Sound waveform (L-ch) Volume: JC connector pin 3 4 5 6 Button scan signal KO6 JA connector pin 14 7 Button scan signal KO7 JA connector pin 15 6 7 8 LCD common signal COM9 SED1278F0A pin 55 9 LCD common signal COM10 SED1278F0A pin 56 8 9 9 PRINTED CIRCUIT BOARDS Main PCB JCM442-MA1M Top View Bottom View 1 2 3 4 5 89 6 7 11 SCHEMATIC DIAGRAMS Main PCB JCM442-MA1M 6 7 1 98 5432 12 Sub PCB JCM442-MA2M 13 Keyboard PCBs KDM4910K-KY1M/KY2M 14 LCD Segment COM7 COM6 COM5 COM4 COM3 COM2 COM1 SEG2 COM11 COM12 SEG39 SEG40 COM10 COM9 COM14 COM15 COM16 SEG11 NC NC NC COM16 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 SEG1 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 COM15 COM14 COM13 COM12 COM11 COM10 COM9 COM16 COM15 COM14 COM13 COM7 COM6 COM5 COM4 COM3 COM2 COM1 SEG2 COM11 COM12 SEG39 SEG40 COM10 COM9 COM14 COM15 COM16 SEG11 NC NC NC COM16 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 SEG1 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 COM15 COM14 COM13 COM12 COM11 COM10 COM9 COM16 COM15 COM14 COM13 Common 15 EXPLODED VIEW 18 14 13 15 12 11 19 17 16 10 R-1 R-2 R-3 5 6 8 79 4 R-4 R-6 R-5 4 3 1 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 seperately. 3.The numbers in item column correspond to the same numbers in drawing. PARTS LIST CTK-401 ItemCode No.Parts NameSpecificationQR Main PCB 16926 0200PCB/ASSY (MA1M)M240592*11 B LSI12012 5603LSI/MC (CPU)MSM6755B-171 A LSI22012 5611LSI/MASK-ROMUM23C2101M-7384/Q1 A LSI32012 5569LSI/LCD DRIVERSED1278F0A1 A IC12012 1883IC/MOS (RESET IC)RN5VD40AA-TR1 B Q12252 1239TRANSISTOR2SC4081T106Q1 B VR12775 3286POTENTIOMETEREVM3SSX50B531 B X12590 2100OSCILLATOR/CERAMICCSACS20.00MX040-TC1 B Sub PCB 26926 0190PCB/ASSY (MA2, 3M)M140548*11 B IC1012114 5775IC/LINEAR (POWER AMP.)TA8248K1 A Q1012250 0168TRANSISTOR2SA854SR-TP-T1 A Q102, Q104/1052220 1409TRANSISTOR2SC1740SR-TP-T3 A Q1032250 1585TRANSISTOR2SD1858TV2Q1 A D1012390 1323DIODE/SHOTTKYRB100A-T32-T1 C D1022390 3018DIODE1T21 C D1032390 1344DIODE1SS133T-77-T11 C D1042360 2044DIODE/ZENERMTZJ6.2A-T77-T1 A D1052360 1799DIODE/ZENERMTZJ5.1A-T77-T1 A LED1012370 0112LEDLN28RPX-(TT8)1 C J1013501 7049JACK (POWER)HEC2305-01-3301 B J1023612 0665JACK (PHONE)YKB21-50061 B Keyboard PCBs 36926 0180PCB/ASSYM140449*31 C D701 - D7492301 0101DIODE1S2473T-77-T49 B Mechanical Parts 43831 0770SPEAKERS10JA13A1 B 53335 6556LCDLD-B10023A1 B 66926 0270RUBBER/INTERCONNECTORM440435-22 C 76909 5890SWITCH/SLIDE KONBCSB-12D1 B 86921 5031KNOBM311859-11 B 96926 0280RUBBER/BUTTONM240587-11 B 106926 0290RUBBER/BUTTONM240588-11 B 116926 0300RUBBER/BUTTONM240589-11 B 126926 0310RUBBER/BUTTONM240590-11 B 136922 2720KEY SET/LT WHITEM312118*13 A 146922 2730KEY SET/LT WHITEM312118*21 A 156922 2740KEY SET/LT BLACK 10PM111726-12 A 166922 4000RUBBER/CONTACTM111765-11 A 176923 2390RUBBER/CONTACTM240025-11 A 186926 0320PANEL/DISPLAYM340608-11 C 196926 0020COVER/BATTERYM340528*21 B Accessory 6906 8752STAND/NOTEM340629B*21 B Notes: Q Quantity per unit R Rank 17 MA0600571A