Casio_CTK-630_Service_Manual电路图.pdf

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1、ELECTRONIC KEYBOARD (with price) CTK-630 CONTENTS Page Specifications . 2 Block Diagram. 3 Circuit Description . 4 Troubleshooting . 10 Major Waveforms . 11 Printed Circuit Boards . 12 Schematic Diagrams . 13 Exploded View . 16 Parts List . 17 RadioFans.CN 收音机爱 好者资料库 2 ELECTRICALNominalLimit Current

2、 drain with 9 V DC: No sound output220 mA220 mA 30 % Maximum volume900 mA900 mA 30 % with white keys C4 to G5 pressed in Recorder tone Volume: maximum, Touch response: maximum Layer: On, Reberv: Off Phone output level (Vrms with 8 load each channel): with key C4 pressed in Recorder tone125 mV125 mV

3、30 % Sound pressure (at 10 cm away from speaker): with key A3 pressed in Recorder tone 98 dB98 dB 10 dB Minimum operating voltage: 5.8 V6.0 V SPECIFICATIONS GENERAL Number of keys:61 Polyphonic:24-note Preset tones:100, Tone expander: Layer On/Off, Split On/Off Keyboard controls:Touch response: On/O

4、ff, Key transpose: Range from F# to F by a semitone increment, Pitch bend: 12 steps up and down (a seminote at muximum) Auto-rhythms:100, Tempo control: 40 to 255 Auto-accompaniment:Mode: CASIO Chord/Fingered/Full-Range Chord 1/ Full-Range Chord 2 Controller: Intro/Fill-In, Synchro/Ending, Normal/Va

5、riation Easy presets:50, including Free Session (Chord): 30, Free Session (Song): 10, Melody Composition: 10 Reverb effects:Hall/Stage/Room Musical pads:8 Pad variations:50, including Pops: 10, Rock: 10, Jazz/Fusion: 10, Dance/Funk: 10 European: 2, Latin/Various: 5, Drums/Percussion: 5 Song memory:3

6、, Real-time recording, Memory capacity: Approx. 1200 notes in total Demo tunes:3, including A Night has 9000 Bars (arranged and programmed by Thomas Hirsch), Wanting This (Edward Alstrom), Supersonic Remorse (Edward Alstrom) Demo tune program:Repeat/Skip Tuning control:440Hz 50 cents Built-in speake

7、rs:12 cm dia. 2 W input rating: 2 pcs. MIDI:16 multi-channel reception Terminals:Phone Jack Output impedance: 90 , Output voltage: 4.6 V(rms) MAX, Sustain Jack, MIDI Jacks (IN, OUT), AC Adapter Jack (9 V) Auto power off:Approximately 6 minutes after the last operation Power source:2-way AC or DC sou

8、rce AC: AC adapter DC: 6 D size dry batteries Power consumption:7.7 W Dimensions (HWD):104 x 931 x 353 mm (4-1/16 x 36-5/8 x 13-7/8 inches) Weight:4.7 kg (10.4 lbs) including batteries RadioFans.CN 收音机爱 好者资料库 3 BLOCK DIAGRAM KC0 KC7 FI0 FI10 SI0 SI19 Working Storage RAM (64K-bit) LSI103 SRM2264LM90

9、MIDI EA0 EA12 EIO0 EIO7 Sound Source ROM (16M-bit) LSI104 MX23C1610MC- 12CA20 LRCK SO BCK D/A Converter IC102 UPD6379GR Filter Q108, Q109 Q119, Q120 Main Volume Power Amplifier IC101 LA4598 LED driver IC103 BA612 Keyboard MA0 MA19 Power Supply Circuit Q101 Q106 D101, D103, D104 VCCAVDDVDD LVDD DVDD

10、VC APO Effect RAM (64K-bit) LSI102 SRM2264LM90 MD0 MD7 Speakers Output MA0 MA12 MA0, MA1 LEDs / 7Seg. LED LED driver Q110 Q117 La Lg, Lp INOUT Reset IC IC105 RE5VA35AA RESET LC0 LC4 Buttons VDD Power Switch PA0 PA7 PB0 PB4 CPU LSI105 UPD912GF-3BA BCK, SO, LRCK DSP LSI101 HG51B227FB FI8 FI10, SI8 KI0

11、 KI2 MD0 MD15 RadioFans.CN 收音机爱 好者资料库 4 KC0KC1KC2KC3KC4KC5KC6KC7 FI0C2 (1)C#2 (1)D2 (1)D#2 (1)E2 (1)F2 (1)F#2 (1)G2 (1) SI0C2 (2)C#2 (2)D2 (2)D#2 (2)E2 (2)F2 (2)F#2 (2)G2 (2) FI1G#2 (1)A2 (1)A#2 (1)B2 (1)C3 (1)C#3 (1)D3 (1)D#3 (1) SI1G#2 (2)A2 (2)A#2 (2)B2 (2)C3 (2)C#3 (2)D3 (2)D#3 (2) FI2E3 (1)F3 (

12、1)F#3 (1)G3 (1)G#3 (1)A3 (1)A#3 (1)B3 (1) SI2E3 (2)F3 (2)F#3 (2)G3 (2)G#3 (2)A3 (2)A#3 (2)B3 (2) FI3C4 (1)C#4 (1)D4 (1)D#4 (1)E4 (1)F4 (1)F#4 (1)G4 (1) SI3C4 (2)C#4 (2)D4 (2)D#4 (2)E4 (2)F4 (2)F#4 (2)G4 (2) FI4G#4 (1)A4 (1)A#4 (1)B4 (1)C5 (1)C#5 (1)D5 (1)D#5 (1) SI4G#4 (2)A4 (2)A#4 (2)B4 (2)C5 (2)C#

13、5 (2)D5 (2)D#5 (2) FI5E5 (1)F5 (1)F#5 (1)G5 (1)G#5 (1)A5 (1)A#5 (1)B5 (1) SI5E5 (2)F5 (2)F#5 (2)G5 (2)G#5 (2)A5 (2)A#5 (2)B5 (2) FI6C6 (1)C#6 (1)D6 (1)D#6 (1)E6 (1)F6 (1)F#6 (1)G6 (1) SI6C6 (2)C#6 (2)D6 (2)D#6 (2)E6 (2)F6 (2)F#6 (2)G6 (2) FI7G#6 (1)A6 (1)A#6 (1)B6 (1)C7 (1) SI7G#6 (2)A6 (2)A#6 (2)B6

14、 (2)C7 (2) FI8Pad A (1)Pad B (1)Pad C (1)Pad D (1)Pad E (1)Pad F (1)Pad G (1)Pad H (1) SI8Pad A (2)Pad B (2)Pad C (2)Pad D (2)Pad E (2)Pad F (2)Pad G (2)Pad H (2) FI9 Intro/ Fill-In Synchro/ Ending Start/ Stop FI10 Bend Up Bend Down Normal/ Variation Tempo Up Tempo Down Accomp. Volume Up Accomp. Vol

15、ume Down KI0ModeReverb0147LayerSplit KI1RhythmTone258 Transpose Tune/MIDI Demo KI2 Easy Preset Pad+369Memory Touch Response CIRCUIT DESCRIPTION KEY MATRIX 5 Key Second contact (2)First contact (1) FI KC SI Reset IC IC105 RE5VA35AA DSP LSI101 HG51B227FB VDD Reset signal VDD Battery set RESET VDD POWE

16、R From power switch NMI APO PLE CPU LSI105 UPD912GF-3BA SCKO Note: Each key has two contacts, the first conatct (1) and second contact (2). POWER SUPPLY CIRCUIT The power supply circuit generates six voltages as shown in the following table. VDD voltage is always generated. The others are controlled

17、 by APO signal from the CPU. NOMENCLATURE OF KEYS RESET CIRCUIT When batteries are set or an AC adapter is connected, the reset IC provides a low pulse to the CPU. The CPU then initializes its internal circuit, and clears the working storage RAM. When the power switch is pressed, the CPU receives a

18、low pulse of POWER signal. The CPU sends APO signal to supply ground source for the DSP, also sends a reset signal to the DSP. NameVoltageFor operation of VDD+5 VCPU, Reset IC, DSP, Sound source ROM, Working storage RAM, Effect RAM DVDD+5 VPower jack, Sustain jack, MIDI jack AVDD+5VDAC, Filter LVDD+

19、4.5 VLED Driver VCC+9 VPower amplifier, Pilot lamp VC+9 VPower amplifier F#3 G#3 A#3C#4 D#4F#4 G#4 A#4 C#5 D#5F#5G#5 A#5 F3G3A3B3C4D4E4F4G4A4B4C5D5E5F5G5A5B5C6 D#3 C2D2E2F2G2A2B2C3D3E3B6A6G6F6E6D6C7 C#3A#2G#2F#2D#2C#2A#6G#6F#6D#6C#6 6 CPU (LSI105: UPD912GF-3BA) The 16-bit CPU contains a 1k-byte RAM,

20、 three 8-bit I/O ports, two timers, a keycontroller and serial interfaces. The CPU detects key velocity by counting the time between first-key input signal FI and second-key SI from the keyboard. The CPU reads sound data and velocity data from the sound source ROM in accordance with the selected ton

21、e; the CPU can read rhythm data simultaneously when a rhythm pattern is selected. Then the CPU provides 16-bit serial sound data to the DSP. The CPU also controls MIDI input/output and stores sequencer data into the working storage RAM. The following table shows the pin functions of LSI105. Pin No.T

22、erminalIn/OutFunction 1TXD0Out MIDI signal input 2RXD0In MIDI signal output 3SCK0Out APO (Auto Power Off) signal output 4, 5TXD1, RXD2 Not used. Connected to ground. 6SCK1Out 1 MHZ synchronizing pulse output 7AVCCIn Ground (0 V) source 8, 9AN0, AN1 Not used. Connected to ground. 10AGNDIn Ground (0 V

23、) source 11BCKOut Bit clock output 12SOOut Serial sound data output 13LRCKOut Word clock output 14GNDIn Ground (0 V) source 15, 16XLT0, XLT1In/Out 20 MHz clock input/output 17VCCIn +5 V source 18, 19MD0, MD1In Mode selection terminal 20RSTBIn Reset signal input 21NMIIn Power ON signal input 22INT No

24、t used. Connected to ground. 23 30 FI0 FI3 SI0 SI3 In Terminal for key input signal 31 38KC0 KC7Out Terminal for key scan signal 39 46 FI4 FI7 SI4 SI7 In Terminal for key input signal 47, 48FI8, SI8In Terminal for pad input signal 49FI9In Terminal for button input signal 50SI9In Sustain signal input

25、 51FI10In Terminal for button input signal 52SI10In Not used 53 55KI0 KI2In Terminal for button input signal 56MWNBOut Write enable signal output 57 76MA0 MA17Out Address bus 77MCSB0Out Chip enable signal output for the sound source ROM 78MCSB1Out Not used 79MCSB2Out Chip enable signal output for th

26、e DSP 7 DIGITAL SIGNAL PROCESSOR (LSI101: HG51B227FB) The DSP receives 16-bit serial sound data output from the CPU and adds the selected effect to the sound data using the effect RAM. Then the DSP provides the sound data to the DAC. The DSP contains two I/O ports, which controls LEDs. The following

27、 table shows the pin functions of LSI101. Pin No.TerminalIn/OutFunction 80VCCIn +5 V source 81GNDIn Ground (0 V) source 82MRDBOut Read enable signal output for the sound source ROM 83 98MD0 MD15In/Out Data bus 99PLEOut Reset signal output for the DSP 100P17In APO cancellation signal input Pin No.Ter

28、minalIn/OutFunction 1 4, 80PB0 PB4Out LED drive signal output 5SOOut Serial sound data output for the DAC 6WCKOOut Word clock output for the DAC 7VDD3In +5 V source 8TEST Not used. 9RESBIn Reset signal input 10VSS2In Ground (0 V) source 11, 12XIN, XOUTIn/Out 16 MHz clock input/output 13WCKIIn Word c

29、lock input from the CPU 14SIIn Serial sound data input from the CPU 15BCKIIn Bit clock input from the CPU 16SINCIn 1 MHz synchronizing pulse input 17VDD2In +5 V source 18 25IO0 IO7In/Out Data bus 26RCEBOut Chip enable signal output for the working storage RAM 27VSS3In Ground (0 V) source 28AD1In Add

30、ress bus 29OEBIn Not used. Connected to +5 V source. 30WEBIn Write enable signal input 31VDD3In +5 V source 32CE2In Chip enable signal input. High active. 33AD0In Address bus 34CE1BIn Chip enable signal input. Low active. 35 41, 43EIO0 EIO7In/Out Data bus for the effect RAM 42 , 44, 46 48, 51 57, 59

31、 EA0 EA12Out Address bus for the effect RAM 45ECEBOut Chip enable signal output for the effect RAM 49EOEBOut Read enable signal output for the effect RAM 8 AVDD 470 AGAG 1K 1K1K C333(H) C332(H) 2SC1740SQ 1K AGAG 2SC1740SQ AVDD 47K22K 50V0.22 10V22 From the DAC To main volume Synch signal Data Word c

32、lock Bit clock Data Word clock Bit clock DSP LSI101 HG51B227FB DAC IC102 UPD6379GR CPU LSI105 UPD912GF-3BA L OUT R OUT SI LRCK CLK SO WCKO SCK1 SO LRCK BCK SINC SI WCKI BCKI DAC (IC102: UPD6379GR) The DAC receives 16-bit serial data output from the DSP. The data contains digital sound data of the me

33、lody, chord, bass, and percussion for the right and left channels. The DAC converts the data into analog waveforms and output them to each channel separately. Pin No.TerminalIn/OutFunction 50VSS3In Ground (0 V) source 58EA13Out Not used 60EWEBOut Write enable signal output for the effect RAM 61EA14O

34、ut Not used 62, 66, 70, 74, 78VSS2In Ground source 63, 67, 71, 75, 79VDD2In +5 V source 64, 65, 68, 69, 72, 73, 76, 77 PA0 PA7Out LED segment signal output FILTER BLOCK Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms. 9 LG DSP LSI101 HG51

35、B227FB LVDD PB0 PB4 IC103 BA612 LED Driver LC0 LC4 Q110 Q117 LED Driver PA0 PA7 La Lg, Lp POWER AMPLIFIER (IC101: LA4598) The power amplifier is a two-channel amplifier with standby switch. The following table shows the pin function of IC101. LED DRIVING Pin No.TerminalIn/OutFunction 1Power GNDIn Gr

36、ound (0V) source 2Ch1 B.S. Terminal for a bootstrap capacitor 3Ch1 OUTOut Channel 1 output 4VCCIn +9V source 5Ch1 N.F.In Negative feedback input 6Ch1 INIn Channel 1 input 7D.C. Terminal for a decoupling capacitor 8Pre GNDIn Ground (0V) source 9Stand byIn Power control signal input. 0 V: Off, +9 V: O

37、n 10Ch2 INIn Channel 2 input 11Ch2 N.F.In Negative feedback input 12Ch2 OUTOut Channel 2 output 13Ch2 B.S. Terminal for a bootstrap capacitor 14NC Not used 10 TROUBLESHOOTING Nature of TroubleFaulty BlockCause/Remedy No powerPower supply circuitFaulty Q101 Q106. Replace Q101 Q105. Faulty D101 D105.

38、Replace D101 D105. Power jack (J101)Open J101 or poor soldering. Replace J101 or resolder. Reset IC (IC105)Faulty IC105. Replace IC105. CPU (LSI105)Faulty LSI105. Replace LSI105. Oscillator (X102)Open X102. Replace X102. No sound at allPower amp (IC101)Open or shorted IC101. Replace IC101. CPU (LSI1

39、05)Faulty LSI105. Replace LSI105. Sound source ROM (LSI104)Faulty LSI104. Replace LSI104. DSP (LSI101)Faulty LSI101. Replace LSI101. Oscillator (X101)Open X101. Replace X101. DAC (IC102)Faulty IC102. Replace IC102. Working storage RAM (LSI103) Faulty LSI103. Replace LSI103. Distorted soundSound sour

40、ce ROM (LSI104)Faulty LSI104. Replace LSI104. DSP (LSI101)Faulty LSI101. Replace LSI101. Effect RAM (LSI102)Faulty LSI102. Replace LSI102. Power amp (IC101)Open or shorted IC101. Replace IC101. Certain keys do not function Key matrixOpen circuit on KC, FI or SI line. Replace keyboard PCB assembly. C

41、ertain buttons do not function Button matrixOpen circuit on KC, FI, SI or KI line. Replace console PCB assembly. A certain button or key does not function Key or button matrixDust on the contact. Clean the contact. 11 MAJOR WAVEFORMS 1POWER ON signal UPD912GF-3BA pin 21 2APO signal UPD912GF-3BA pin

42、3 3Reset signal for the DSP UPD912G-3BA pin 99 5Key scan signal KC0 UPD912GF-3BA pin 31 6Key scan signal KC1 UPD912GF-3BA pin 32 7Key scan signal KC2 UPD912GF-3BA pin 33 4Synchronizing pulse UPD912GF-3BA pin 6 AWord clock LRCK UPD912GF-3BA pin 13 BData signal SO UPD912GF-3BA pin 12 CBit clock BCK UP

43、D912GF-3BA pin 11 DWord clock LRCK UPD6379GR pin 1 EData signal SI UPD6379GR pin 2 FBit clock CLK UPD6379GR pin 3 8LED drive signal PB0 HG51B227FB pin 80 9LED drive signal PB1 HG51B227B pin 1 0LED drive signal PB2 HG51B227FB pin 2 GDAC output (R-ch) UPD6379GR pin 5 HDAC output (L-ch) UPD6379GR pin 8

44、 IAmp. input (R-ch) LA4598 pin 6 JAmp. input (L-ch) LA4598 pin 10 Note: On Tone : Whistle (70) Key :A4 Touch response : Off Reverb :Off Volume : Maximum 1 2 3 0.1 s CH1 CH2 CH1:CH2: 5 V5 V 4 20 s CH1 5 VCH1: 5 6 7 CH1 CH2 CH3 50 s 5 VCH1:5 VCH2:5 VCH3: 8 9 0 CH1 CH2 CH3 5 VCH1:5 VCH2:5 VCH3: 5 ms A

45、B C CH1 CH2 CH3 2 s 5 VCH1:5 VCH2:5 VCH3: D E F CH1 CH2 CH3 2 s 5 VCH1:5 VCH2:5 VCH3: G H CH1: . 1 V CH1 CH2 CH2: . 1 V 1 ms I J CH1 CH2 CH1: . 1 V CH2: . 1 V 1 ms 12 PRINTED CIRCUIT BOARDS Main PCB JCM461-MA1M Console PCB JCM461-CN1M Top View Top View BL R110 R109 75 250 E 5 R137 C116 300 PR Y L105 C208 C167 IC105 X102 3 C174 C173 D110 R182 R180 R302 C164 R179 R178 75 1 1 C207 200 150 250 R309 R181 R272 R273 R274 R275 5 R292 75 C206 R276 R277 R278 R279 200 250 175 75 C20