Casio CTK-630 User Manual
(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
ELECTRONIC KEYBOARD
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/Off, 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/Variation
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, 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 speakers: 12 cm dia. 2 W input rating: 2 pcs.
MIDI: 16 multi-channel reception
Terminals: Phone Jack [Output impedance: 90 Ω, 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 source
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
ELECTRICAL Nominal Limit
Current drain with 9 V DC:
No sound output 220 mA 220 mA ± 30 %
Maximum volume 900 mA 900 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 Ω load each channel):
with key C4 pressed in Recorder tone 125 mV 125 mV ± 30 %
Sound pressure (at 10 cm away from speaker):
with key A3 pressed in Recorder tone 98 dB 98 dB ± 10 dB
Minimum operating voltage: 5.8 V 6.0 V
— 2 —
BLOCK DIAGRAM
Working Storage
RAM (64K-bit)
LSI103
SRM2264LM90
MIDI
Power Switch
VDD
Buttons
INOUT
Reset IC
IC105
RE5VA35AA
Sound Source ROM
(16M-bit)
LSI104
MX23C1610MC-
12CA20
Effect RAM
(64K-bit)
LSI102
SRM2264LM90
RESET
MA0 ~ MA19
MA0, MA1
EA0 ~
EA12
EIO0 ~
EIO7
MA0
~
MA12
MD0 ~ MD15
MD0
~
MD7
LSI101
HG51B227FB
LRCK SO BCK
DSP
KI0 ~ KI2
CPU
LSI105
UPD912GF-3BA
BCK, SO, LRCK
PA0 ~ PA7
PB0 ~ PB4
FI0 ~ FI10
SI0 ~ SI19
KC0 ~ KC7
LED driver
Q110 ~ Q117
LED driver
IC103
BA612
FI8 ~ FI10, SI8
Keyboard
La ~ Lg, Lp
LEDs /
7Seg. LED
LC0 ~ LC4
Speakers
Output
D/A Converter
IC102
UPD6379GR
Filter
Q108, Q109
Q119, Q120
Main
Volume
Power Amplifier
IC101
LA4598
— 3 —
APO
LVDD
VCC
AVDD
Power Supply Circuit
Q101 ~ Q106
D101, D103, D104
DVDD
VC
VDD
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 (1) C#4 (1) D4 (1) D#4 (1) E4 (1) F4 (1) F#4 (1) G4 (1)
SI3 C4 (2) C#4 (2) D4 (2) D#4 (2) E4 (2) F4 (2) F#4 (2) G4 (2)
FI4 G#4 (1) A4 (1) A#4 (1) B4 (1) C5 (1) C#5 (1) D5 (1) D#5 (1)
SI4 G#4 (2) A4 (2) A#4 (2) B4 (2) C5 (2) C#5 (2) D5 (2) D#5 (2)
FI5 E5 (1) F5 (1) F#5 (1) G5 (1) G#5 (1) A5 (1) A#5 (1) B5 (1)
SI5 E5 (2) F5 (2) F#5 (2) G5 (2) G#5 (2) A5 (2) A#5 (2) B5 (2)
FI6 C6 (1) C#6 (1) D6 (1) D#6 (1) E6 (1) F6 (1) F#6 (1) G6 (1)
SI6 C6 (2) C#6 (2) D6 (2) D#6 (2) E6 (2) F6 (2) F#6 (2) G6 (2)
FI7 G#6 (1) A6 (1) A#6 (1) B6 (1) C7 (1)
SI7 G#6 (2) A6 (2) A#6 (2) B6 (2) C7 (2)
FI8 Pad A (1) Pad B (1) Pad C (1) Pad D (1) Pad E (1) Pad F (1) Pad G (1) Pad H (1)
SI8 Pad A (2) Pad B (2) Pad C (2) Pad D (2) Pad E (2) Pad F (2) Pad G (2) Pad H (2)
FI9
FI10
Intro/
Fill-In
Bend
Up
Synchro/
Ending
Bend
Down
Start/
Stop
Normal/
Variation
Tempo
Up
Tempo
Down
Accomp.
Volume
Up
Accomp.
Volume
Down
KI0 Mode Reverb 0 1 4 7 Layer Split
KI1 Rhythm Tone – 2 5 8
KI2
Easy
Preset
Pad + 3 6 9 Memory
Transpose
Tune/MIDI
Demo
Touch
Response
— 4 —
Note: Each key has two contacts,
the first conatct (1) and second contact (2).
NOMENCLATURE OF KEYS
Second contact (2)
Key
First contact (1)
FI
KC
SI
C#2
C2 D2E2F2G2A2 B2 C3 D3
F#2D#2
C#3A#2G#2
F#3 G#3
D#3
E3
F3 G3 A3 B3 C4 D4 E4 F4 G4 A4 B4 C5 D5 E5 F5 G5 A5 B5
A#3 C#4 D#4
F#4 G#4
A#4
C#5
D#5
F#5 G#5
A#5
C#6
C6
G#6F#6D#6
A#6
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 by APO signal from the CPU.
Name Voltage For operation of
VDD +5 V CPU, Reset IC, DSP, Sound source ROM, Working storage RAM, Effect RAM
DVDD +5 V Power jack, Sustain jack, MIDI jack
AVDD +5V DAC, Filter
LVDD +4.5 V LED Driver
VCC +9 V Power amplifier, Pilot lamp
VC +9 V Power amplifier
B6A6G6F6E6D6
C7
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 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.
Battery set
VDD
Reset IC
IC105
RE5VA35AA
POWER
From power switch
RESET
VDD
CPU
LSI105
UPD912GF-3BA
SCKO
NMI
— 5 —
Reset signal
PLE
HG51B227FB
APO
VDD
DSP
LSI101
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. 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. Terminal In/Out Function
1 TXD0 Out MIDI signal input
2 RXD0 In MIDI signal output
3 SCK0 Out APO (Auto Power Off) signal output
4, 5 TXD1, RXD2 — Not used. Connected to ground.
6 SCK1 Out 1 MHZ synchronizing pulse output
7 AVCC In Ground (0 V) source
8, 9 AN0, AN1 — Not used. Connected to ground.
10 AGND In Ground (0 V) source
11 BCK Out Bit clock output
12 SO Out Serial sound data output
13 LRCK Out Word clock output
14 GND In Ground (0 V) source
15, 16 XLT0, XLT1 In/Out 20 MHz clock input/output
17 VCC In +5 V source
18, 19 MD0, MD1 In Mode selection terminal
20 RSTB In Reset signal input
21 NMI In Power ON signal input
22 INT — Not used. Connected to ground.
23 ~ 30
31 ~ 38 KC0 ~ KC7 Out Terminal for key scan signal
FI0 ~ FI3
SI0 ~ SI3
In Terminal for key input signal
39 ~ 46
47, 48 FI8, SI8 In Terminal for pad input signal
49 FI9 In Terminal for button input signal
50 SI9 In Sustain signal input
51 FI10 In Terminal for button input signal
52 SI10 In Not used
53 ~ 55 KI0 ~ KI2 In Terminal for button input signal
56 MWNB Out Write enable signal output
57 ~ 76 MA0 ~ MA17 Out Address bus
77 MCSB0 Out Chip enable signal output for the sound source ROM
78 MCSB1 Out Not used
79 MCSB2 Out Chip enable signal output for the DSP
FI4 ~ FI7
SI4 ~ SI7
In Terminal for key input signal
— 6 —
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