(with price)
CTK-500
ELECTRONIC KEYBOARD
R
CTK-500
- 2 -
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Major Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PCB Views and Major Check Points . . . . . . . . . . . . . . . . . . . . . . . . 8
Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
IC and Transistor Lead Identification . . . . . . . . . . . . . . . . . . . . . 12
Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
CONTENTS
-- 1 --
General
Number of Keys:
61
Polyphonic:
16-note
Preset Tones:
120
Auto-Rhythms:
40
Auto-Accompaniment:
CASIO Chord/Fingered
Jukebox Tunes:
40
Chord Memory:
Real-Time Recording
Memory Capacity: 128 chords (maximum)
Built-In Speakers:
12 cm dia. 1.1W Input Rating: 2 pcs.
Terminals:
Output Jack [Output Impedance: 50
, Output Voltage: 1.4 V (rms)MAX],
AC Adapter Jack (DC 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:
6.7 W
Dimentions:
110 x 939 x 337 mm (HWD)
(4-5/16 x 36-15/16 x 13-1/4 inches) (HWD)
Weight:
4.5 kg (9.9 lbs) excluding batteries
Electrical
Current Drain with 9V DC:
No Sound Output
125 mA
± 30%
Maximum Volume
530 mA
± 30%
with keys C4 to D#5 pressed in Clarinet tone,
Volume; Maximum, Rhythm; Samba,
Tempo; Maximum
Output Level (Vrms with 8
load each channel):
107 mV
± 30%
with key C4 pressed in Clarinet tone,
Volume; Maximum
Sound Pressure Level:
107 dB
± 10 dB
at 10 cm away from the speaker with key G6
in Brass-1 tone
Minimum Operating Voltage:
6.0 V
SPECIFICATIONS
--
2
--
LEDs
LED Driver
IC3
KO0 ~ KO5, KO17
OE
CE
A0 ~ A16
D0 ~ D15
43.45 MHz Clock
Keys and Switches
KO0 ~ KO16
KI1 ~ KI7
CPU
MSM6626-01
LSI1
ROM
MN232000CUQ
LSI2
ROUT
LOUT
Reset IC
S8053ANO
IC4
KO18
(APO)
VCC
AVDD
VDD
Power Amp.
LA4127
IC2
Output
Power IC
CA5668
IC1
Filter (R)
T5
Filter (L)
T6
Speakers
Main Volume
Control
X1
BLOCK DIAGRAM
-- 3 --
CIRCUIT DESCRIPTION
Key and Switch Matrix
KI0
KI1
KI2
KI3
KI4
KI5
KI6
KI7
KO0
C2
C#2
D2
D#2
E2
F2
KO1
F#2
G2
G#2
A2
A#2
B2
KO2
C3
C#3
D3
D#3
E3
F3
KO3
F#3
G3
G#3
A3
A#3
B3
KO4
C4
C#4
D4
D#4
E4
F4
KO5
F#4
G4
G#4
A4
A#4
B4
KO6
C5
C#5
D5
D#5
E5
F5
KO7
F#5
G5
G#5
A5
A#5
B5
KO8
C6
C#6
D6
D#6
E6
F6
KO9
F#6
G6
G#6
A6
A#6
B6
KO10
C7
Tempo
Up
Tempo
Down
KO11
Power
Off
Normal
Fingered
CASIO
Chord
KO12
Accomp.
Volume 1
(Min)
Accomp.
Volume 2
Accomp.
Volume 3
Accomp.
Volume 4
Accomp.
Volume 5
(Max)
KO13 Reverb Off
Reverb 1
Reverb 2
KO14
Synchro
/ Fill-In
Start/Stop
Intro/
Ending
Chord
Memory
Record
Chord
Memory
Play
Ad-Lib
Musician
Jukebox
Start/Stop
Beat
(Jukebox)
KO15
Bank A
Bank B
Bank C
Bank D
Bank E
Bank F
Bank G
Bank H
KO16
Number 1
Number 2
Number 3
Number 4
Number 5
Solo
Sound
Duo
Sound
Ensenble
Sound