(with price) CTK-630 CONTENTS Page Specifications ................................................................................................................................... 2 Block Diagram .................................................................................................................................. 3 Circuit Description ............................................................................................................................ 4 Troubleshooting .................
SPECIFICATIONS GENERAL Number of keys: Polyphonic: Preset tones: Keyboard controls: Auto-rhythms: Auto-accompaniment: Easy presets: Reverb effects: Musical pads: Pad variations: Song memory: Demo tunes: Demo tune program: Tuning control: Built-in speakers: MIDI: Terminals: Auto power off: Power source: Power consumption: Dimensions (HWD): Weight: 61 24-note 100, Tone expander: Layer On/Off, Split On/Off Touch response: On/Off, Key transpose: Range from F# to F by a semitone increment, Pitch bend: 12 st
BLOCK DIAGRAM Power Switch VDD Working Storage RAM (64K-bit) LSI103 SRM2264LM90 Buttons MIDI OUT IN FI8 ~ FI10, SI8 Reset IC IC105 RE5VA35AA RESET MD0 ~ MD7 MA0 ~ MA12 KI0 ~ KI2 CPU Sound Source ROM (16M-bit) LSI104 MX23C1610MC12CA20 MD0 ~ MD15 LSI105 Keyboard UPD912GF-3BA MA0 ~ MA19 KC0 ~ KC7 MA0, MA1 Effect RAM (64K-bit) LSI102 SRM2264LM90 FI0 ~ FI10 SI0 ~ SI19 BCK, SO, LRCK EA0 ~ EA12 PA0 ~ PA7 DSP LED driver La ~ Lg, Lp Q110 ~ Q117 LEDs / 7Seg.
CIRCUIT DESCRIPTION KEY MATRIX KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7 FI0 C2 (1) C#2 (1) D2 (1) D#2 (1) E2 (1) F2 (1) F#2 (1) G2 (1) SI0 C2 (2) C#2 (2) D2 (2) D#2 (2) E2 (2) F2 (2) F#2 (2) G2 (2) FI1 G#2 (1) A2 (1) A#2 (1) B2 (1) C3 (1) C#3 (1) D3 (1) D#3 (1) SI1 G#2 (2) A2 (2) A#2 (2) B2 (2) C3 (2) C#3 (2) D3 (2) D#3 (2) FI2 E3 (1) F3 (1) F#3 (1) G3 (1) G#3 (1) A3 (1) A#3 (1) B3 (1) SI2 E3 (2) F3 (2) F#3 (2) G3 (2) G#3 (2) A3 (2) A#3 (2) B3 (2) FI3 C4
Key Note: Each key has two contacts, the first conatct (1) and second contact (2). FI First contact (1) Second contact (2) KC SI NOMENCLATURE OF KEYS C#2 D#2 C2 D2 E2 F#2 G#2 A#2 F2 G2 A2 B2 C#3 D#3 C3 D3 F#3 G#3 A#3 E3 F3 G3 A3 B3 F#4 G#4 A#4 C#4 D#4 C4 D4 E4 F4 G4 A4 C#5 D#5 B4 C5 D5 E5 F#5 G#5 A#5 F5 G5 A5 B5 C#6 D#6 C6 D6 E6 F#6 G#6 A#6 F6 G6 A6 B6 C7 POWER SUPPLY CIRCUIT The power supply circuit generates six voltages as shown in the following table.
CPU (LSI105: 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 reads sound data and velocity data from the sound source ROM in accordance with the selected tone; 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.
Pin No. Terminal In/Out 80 VCC In 81 82 GND MRDB In Out 83 ~ 98 MD0 ~ MD15 In/Out 99 PLE Out 100 P17 In Function +5 V source Ground (0 V) source Read enable signal output for the sound source ROM Data bus Reset signal output for the DSP APO cancellation signal input 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.
Pin No. Terminal In/Out Function 50 VSS3 In 58 60 EA13 EWEB Out Out Not used Write enable signal output for the effect RAM 61 EA14 Out Not used 62, 66, 70, 74, 78 VSS2 In Ground source 63, 67, 71, 75, 79 VDD2 In +5 V source 64, 65, 68, 69, 72, 73, 76, 77 PA0 ~ PA7 Out Ground (0 V) source LED segment signal output DAC (IC102: UPD6379GR) The DAC receives 16-bit serial data output from the DSP.
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 (0V) source 2 Ch1 B.S. — Terminal for a bootstrap capacitor 3 Ch1 OUT Out Channel 1 output 4 VCC In +9V source 5 Ch1 N.F. In Negative feedback input 6 Ch1 IN In Channel 1 input 7 D.C.
TROUBLESHOOTING Nature of Trouble No power Faulty Block Power supply circuit Cause/Remedy Faulty Q101 ~ Q106. Replace Q101 ~ Q105. Faulty D101 ~ D105. 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. Power amp (IC101) Open or shorted IC101. Replace IC101. CPU (LSI105) Faulty LSI105. Replace LSI105.
MAJOR WAVEFORMS 1 2 µs 20 µs 0.
LED416 LED413 5 5 Top View — 12 — D417 D416 LSI102 R296 R300 5 1 5 D415 D414 5 5 5 5 LED401 LED412 LN882RPX - (TT) 497 D407 D406 D409 D408 D410 D413 D412 D411 JB R304 16 JC 16 JC NO.
SCHEMATIC DIAGRAMS Main PCB JCM461-MA1M Notes: 1. All capacitance values are indicated in "µF" (p=10-6 µF). 2. All resistance values are indicated in "Ω" (k=103 Ω, M=106 Ω).
Console PCB JCM461-CN1M — 14 —
Keyboard PCBs JCM617T-KY1M/KY2M — 15 —
EXPLODED VIEW 15 14 12 13 3 1 4 5 2 16 8 12 6 9 7 10 17 18 19 — 16 — 11 20 21 21-2 22 23 21-1 24 25 27 26
PARTS LIST CTK-630 Notes: 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.
N Item N N N N 11 LSI101 LSI102/103 LSI104 LSI105 IC101 IC102 IC103 IC104 IC105 IC106 Q101, Q103 Q102, Q104, Q106, Q108/109, Q118~123 Q105 Q107 Q110~117 Q124 D101, D104 D102 D103 D105, D108~111 D106 D107 C194~196 J101 J102 J103 J104/105 VR101 X101 X102 Code No.
N Item Code No.
MA0800951A
