Casio_CPS-7_Service_Manual电路图.pdf

ELECTRONIC KEYBOARD (without price) CPS-7 CPS-7 RadioFans.CN 收音机爱 好者资料库 2 CONTENTS ELECTRICAL Current Drain with 12 V DC: No Sound Output145 mA 20% Maximum Volume1470 mA 20% with keys C2 to B3 (24 polyphonic) pressed in Strings tone Volume: maximum, Touch response: maximum Headphone Output Level (Vrms with 8 load each channel): with key F3 pressed in Strings toneLeft channel100 mV 20% Speaker Output Level (Vrms with 8 load each channel): with key F2 pressed in Strings toneLeft channel2800 mV 20% Minimum Operating Voltage:5.8 V SPECIFICATIONS GENERAL Number of keys:76 Polyphonic:24-note Preset tones:5, Piano-1, Piano-2, Electric Piano, Pipe Organ, Strings Layer Touch response:On/Off Key transpose:Range of 1 octave by a semitone increment Demo tunes:5,1. Petit Chien 2. Cozys Castle 3. Red Leaves 4. Toccata & Chorus 5. Rainbow Tuning control:440Hz 50 cents Built-In speakers:12 cm dia. 5 W input rating: 2 pcs. MIDI:8-channel, multi-timbral reception Terminals:Phone Jack Output impedance: 47 , Output voltage: 2.6 V(rms) MAX, MIDI Jacks (IN, OUT), Sustain Jack, AC Adaptor Jack (12 V) Auto power off:Approximately 6 minutes after the last operation Power source:2-way AC or DC source AC: AC adaptor AD-12 DC: 6 D size dry batteries Battery life: approx. 4 hours by manganese batteries R20P/SUM-1 Power consumption:18 W Dimensions (HWD):96 x 1161 x 303 mm (3-3/4 x 45-11/16 x 11-15/16 inches) Weight:6.3 kg (13.9 lbs) excluding batteries Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Major Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 PCB View and Check Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Schematic Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Exploded View. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 RadioFans.CN 收音机爱 好者资料库 3 BLOCK DIAGRAM KC0 KC7 FI0 FI9 SI0 SI9 Sound Source ROM (2M-bit) LSI102 TC534200CF-C116 LRCK, SO, BCK D/A Converter IC105 UPD6379GR Filter IC104 M5218APR Power Amplifier IC101 LA4620 Keyboard MA0 MA17 Power Supply Circuit Q102 Q107, D105, D106 VCC AVDDVDDVC APO Speakers Output MIDI IN OUT ButtonsVDD Power Switch Reset IC IC106 RE5VA35AA RESET CPU LSI101 UPD912GF-3BA KI0 MD0 MD15 NMI Main Volume Equalizer IC103 M5218APR NOMENCLATURE OF KEYS 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 E1F1G1A1B1 F#1 G#1 A#1 D7E7F7G7 C#7D#7F#7 RadioFans.CN 收音机爱 好者资料库 4 CIRCUIT DESCRIPTION KEY MATRIX Note: Each key has two contacts, the first conatct (1) and second contact (2). Key Second contact (2)First contact (1) FI KC SI KC0KC1KC2KC3KC4KC5KC6KC7 FI0E1 (1)F1 (1)F#1 (1)G1 (1)G#1 (1)A1 (1)A#1 (1) SI0E1 (2)F1 (2)F#1 (2)G1 (2)G#1 (2)A1 (2)A#1 (2) FI1B1 (1)C2 (1)C#2 (1)D2 (1)D#2 (1)E2 (1)F2 (1)F#2 (1) SI1B1 (2)C2 (2)C#2 (2)D2 (2)D#2 (2)E2 (2)F2 (2)F#2 (2) FI2G2 (1)G#2 (1)A2 (1)A#2 (1)B2 (1)C3 (1)C#3 (1)D3 (1) SI2G2 (2)G#2 (2)A2 (2)A#2 (2)B2 (2)C3 (2)C#3 (2)D3 (2) FI3D#3 (1)E3 (1)F3 (1)F#3 (1)G3 (1)G#3 (1)A3 (1)A#3 (1) SI3D#3 (2)E3 (2)F3 (2)F#3 (2)G3 (2)G#3 (2)A3 (2)A#3 (2) FI4B3 (1)C4 (1)C#4 (1)D4 (1)D#4 (1)E4 (1)F4 (1)F#4 (1) SI4B3 (2)C4 (2)C#4 (2)D4 (2)D#4 (2)E4 (2)F4 (2)F#4 (2) FI5G4 (1)G#4 (1)A4 (1)A#4 (1)B4 (1)C5 (1)C#5 (1)D5 (1) SI5G4 (2)G#4 (2)A4 (2)A#4 (2)B4 (2)C5 (2)C#5 (2)D5 (2) FI6D#5 (1)E5 (1)F5 (1)F#5 (1)G5 (1)G#5 (1)A5 (1)A#5 (1) SI6D#5 (2)E5 (2)F5 (2)F#5 (2)G5 (2)G#5 (2)A5 (2)A#5 (2) FI7B5 (1)C6 (1)C#6 (1)D6 (1)D#6 (1)E6 (1)F6 (1)F#6 (1) SI7B5 (2)C6 (2)C#6 (2)D6 (2)D#6 (2)E6 (2)F6 (2)F#6 (2) FI8G6 (1)G#6 (1)A6 (1)A#6 (1)B6 (1)C7 (1)C#7 (1)D7 (1) SI8G6 (2)G#6 (2)A6 (2)A#6 (2)B6 (2)C7 (2)C#7 (2)D7 (2) FI9D#7 (1)E7 (1)F7 (1)F#7 (1)G7 (1) SI9D#7 (2)E7 (2)F7 (2)F#7 (2)G7 (2) KI1 Touch Response Transpose /Tune/MIDI Piano-1Piano-2E.Piano Pipe Organ StringsDemo 5 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. When the power switch is pressed, the CPU receives a low pulse of POWER signal.The CPU raises APO signal to +5 V to turn power on. Reset IC IC106 RE5VA35AA Power Supply Circuit VDD Battery set RESET VDD POWER From power switchNMI APO CPU LSI101 UPD912GF-3BA SCKO RSTB POWER SUPPLY CIRCUIT The power supply circuit generates four voltages as shown in the following table. VDD voltage is always generated. The others are controlled by APO signal from the CPU. NameVoltageFor operation of VDD+5 VCPU, Reset IC, Sound source ROM AVDD+5.3 VDAC AVCC+12 VFilter block, Equalizer block VC+12 VPower amplifier CPU (LSI101: UPD912GF-3BA) The 16-bit CPU contains a 1k-byte RAM, 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 read sound data and velocity data from the sound source ROM in accordance with the selected tone. Then the CPU provides 16-bit serial sound data to the DAC.The CPU also controls MIDI input/output and LED driving. The following table shows the pin functions of LSI101. Pin No.TerminalIn/OutFunction 1TXD0Out MIDI signal input 2RXD0In MIDI signal output 3SCK0Out APO (Auto Power Off) signal output 4 6 Not used. Connected to ground. 7AVCCIn Ground (0 V) source 8, 9AN0, AN1 Not used. Connected to ground. 10AGNDIn Ground (0 V) source 11BCKOut Bit clock output 12SOOut Serial sound data output 13LRCKOut Word clock output 14GNDIn Ground (0 V) source 6 CPU LSI101 UPD912GF-3BA Sound Source ROM LSI102 TC534200CF-C116 CEA0 A17D0 D15 MA1 MA18 MD0 MD15 MSB0 FI0 FI9 SI0 SI9 SO BOK LRCK PG X101 20 MHz DAC IC105 UPD6379GR LOUT ROUT SO: Sound data BOK: Bit clock LRCK: Word clock SI CLK LRCK From keyboard Pin No.TerminalIn/OutFunction 15, 16XLT0, XLT1In/Out 20 MHz clock input/output 17VCCIn +5 V source 18, 19MD0, MD1In Mode selection terminal. Connected to ground. 20RSTBIn Reset signal input 21NMIIn Power ON signal input 22INT Not used. Connected to ground. 23 30 FI0 FI3 SI0 SI3 In Key input signal 31 38KC0 KC7Out Key scan signal output 39 50 FI4 FI9 SI4 SI9 In Key input signal 51FI10In Not used 52SI10In Not used 53 KI0In Button input signal input 54KI1 Not used 55KI2Out LED drive signal 56 58 Not used 59 76MA1 MA18Out Address bus 77MCSB0Out Chip enable signal output for the sound source ROM 78, 79 Not used 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 99PLEIn Sustain signal input 100P17In APO cancellation signal input Block diagram of digital circuits 7 FILTER BLOCK Since the sound signals from the DAC are stepped waveforms, the filter block is added to smooth the waveforms. Filter Block IC104 From DACTo main volume EQUALIZER BLOCK The equalizer block boots low frequencies to compensate for the reduced response of the built-in speakers. From main volumeTo power amplifier Equalizer Block IC103 DAC (IC105: UPD6379GR) The DAC receives 16-bit serial data output from the CPU. The data contains digital sound data of the melody, 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. POWER AMPLIFIER (IC102: LA4598) The power amplifier is a two-channel amplifier with standby switch. Input Amp. Pre-drive Amp. Power Amp. RL Short Protector Input Amp. Pre-drive Amp. Power Amp. Terminal Protection Circuit Ripple Filter Pop Noise Prevention Circuit Input Amp. Pre-drive Amp. Power Amp. RL Short Protector Input Amp. Pre-drive Amp. Power Amp. 161011132 12 14 15 17 18 1 23 22 21 20 19 3 5 4 9 7 8 6 IN11+ IN11- IN12- PriGND IN21+ IN21- IN22- NCDCMUTEVCC2ADJ Boot22 OUT22 PoGND2 OUT21 Boot21 VCC1 Boot21 OUT12 PoGND1 OUT11 Boot11 + - - + + - - + 8 1 2 CH1 CH2 3 4 5 CH1 CH2 CH3 6 7 8 CH1: 5 V CH2: 5 V CH3: 5 V A 2 s 0.1 s CH1:CH2: 5 V5 V 50 s CH1 CH2 CH3 CH1:CH2: 5 V5 VCH3: 5 V MAJOR WAVEFORMS 3 Key scan signal KC0 UPD912GF-3BA pin 31 4 Key scan signal KC1 UPD912GF-3BA pin 32 5 Key scan signal KC2 UPD912GF-3BA pin 33 1 POWER ON signal UPD912GF-3BA pin 21 2 APO signal UPD912GF-3BA pin 3 6 Word clock LRCK UPD912GF-3BA pin 13 7 Data signal SO UPD912GF-3BA pin 12 8 Bit clock BCK UPD912GF-3BA pin 11 9 A B CH1 CH2 CH1: 50 mV CH2: 50 mV A 1 ms A 1 ms CH1 CH2 CH1: 0.1 V CH2: 0.1 V 9 0 PCB VIEW AND CHECK PRINTS Tone: Piano-1 Key:A4 Touch response:Off Volume: Maximum 9 DAC output (R-ch) UPD6379GR pin 5 0 DAC output (L-ch) UPD6379GR pin 8 A Equalizer output (R-ch) B Equalizer output (L-ch) 121191016823457 10 SCHEMATIC DIAGRAMS MAIN PCB JCM422-MA1M 1 435 768 2 10 9 12 11 0.0 5.111.1 5.7 11.7 11.7 5.36.0 11.0 11.6 0.7 11.0 0.0 5.1 4.5 5.1 11 KEYBOARD PCBs JCM762T-KY1M/KY2M 12 EXPLODED VIEW 8 7 3 1 4 5 6 6 9 10 12 13 15 11 14 15-1 15-2 20 18 17 16 2 19 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 numbers in item column correspond to the same numbers in drawing. PARTS LIST CPS-7 NItemCode No.Part NameSpecificationQR Main PCB N16923 7620PCB assy JCM422-MA1MM140249*11B LSI1012012 0168LSIUPD912GF-3BA1A NLSI1022012 1085LSITC534200CF-C1161A IC1052105 4249LSIUPD6379GR1A IC1012114 1883ICLA46201A IC1022114 1421IC, PhotocouplerPC900V1B IC103/1042114 1799ICM5218APR2B IC1062105 3941ICRE5VA35AA-TZ1B Q1012200 4409Transistor2SA933-SQ-TP-T1A Q1022250 0168Transistor2SA854-SR-TP-T1A Q1032251 0672Transistor2SB1548-P.CS1A Q104/105, Q108/109 2220 1387Transistor2SC1740SQ-TP-T4B Q106/1072253 0448Transistor2SD1858Q,R-TV6-T2A Q110/1112252 0168Transistor2SC3112B-TPE2-T2B D101/1022390 1463SchottkySB20-03B2B D103/104, D108117 2390 1344Diode1SS133T-77-T12 C D1052360 1085Zener diodeHZS6B1LTD-T1A D1062360 1694Zener diodeRD6.2ESB1-T1-T1A D1072310 7996Zener diodeRD4.7ESB2-T1-T1B LED101/1022370 0616LEDLN28RPX-(TT2)2B X1012590 2009Crystal oscillatorHC-49/US20A1B J1013501 5012Jack, PowerHEC2305-01-9201A J1023612 0665Jack, PhoneYKB21-50061A J1033612 0789JackYKB21-50101B J1043501 4816Jack, DINYKF51-50511B MC101/1022845 0168Module capacitorCNB8X101K2C MC103/1042845 0056Module capacitorCNB6X221K2C MC1052845 0049Module capacitorCNB8X221K1C Keyboard PCBs N26923 7630PCB assy M762T-KY123MM140251*11B D5016522301 0101Diode1S2473-T-77-T152C Mechanical Parts N36923 7680Rubber button, 8-contactM240177-11B 46909 5890Slide contactCSB-12D1B N56923 7670Rubber button, 1-contactM340202-11B 63831 0672Speaker12G30BFB2B N76923 7650Switch knobM340203-11B N86923 7660Panel, TopM240225*11C N96923 7900White key set, CDEFGM340231*11A 106922 2720White key set, 1-octaveM312118*15A N116923 7910White key set, SFGABM340230*11A N126923 7940Black key set, 8-keyM111726-41A 136922 2740Black key set, 10-keyM111726-12A N146923 7930Black key set, 3-keyM111726-31A N156923 7862CaseM140239B*11C 15-16903 2150Battery spring, (+)M41330-11B 15-26902 6140Battery spring, (-)M41226-11B N166923 8000Key contact rubber, C-GM240182-11B Notes: N New parts M Minimum order/supply quantity R Rank 13 NItemCode No.Part NameSpecificationQR 15-16903 2150Battery spring, (+)M41330-11B 15-26902 6140Battery spring, (-)M41226-11B N166923 8000Key contact rubber, C-GM240182-11B 176922 2761Key conatct rubber, 1-octaveM211704A-15B N186923 7970Key contact rubber, E-BM240181-11B N196923 7640Bottom caseM240223*11C 206918 1636Battery coverM311164F*11B Accessories N6924 1840Music standM340328*11C N6924 1870StandCS-40P1C N1909 9792Screw set for CS-40PCS-40P-S1B Notes: N New parts M Minimum order/supply quantity R Rank 14 MA0900951A