Casio CTK-731

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BACK LIGHT LCD
INTRO
RECORD SONG PATTERN
DSP
CONTRAST
FREE SESSION
ONE TOUCH PRESET
TONE
RHYTHM
LAYER/AUTO HARMONIZE
SPLIT
MIN
MAX
FULL RANGE
CHORD
000-009
010-019
020-029
030-039
040-049
050-059
060-069
070-079
080-089
090-099
100-109
8 BEAT
0 REVERB 1
LAYER
AUTO
HARMONIZE
TOUCH
RESPONSE
SPLIT
GM
1 REVERB 2
2 REVERB 3
3 CHORUS
4 TREMOLO
5 PHASE SHIFTER
6 ORGAN SPEAKER
7 ENHANCER
8 FLANGER
9 EQ LOUDNESS
000-007 PIANO
008-015 CHROMATIC PERC
016-023 ORGAN
024-031 GUITAR
032-039 BASS
040-047 STR/ORCHESTRA
048-055 ENSEMBLE
056-063 BRASS
064-071 REED
072-079 PIPE
080-087 SYNTH-LEAD
088-095 SYNTH-PAD
096-103 SYNTH-SFX
104-111 ETHNIC
112-119 PERCUSSIVE
120-127 SOUND EFFECTS
128-191 VARIATION TONE
192-199 DRUM SET
200-231 USER TONE
16 BEAT
ROCK
POPS I
POPS II
JAZZ
EUROPEAN
LATIN I
LATIN II/VARIOUS I
VARIOUS II
USER RHYTHM
FINGERED
CASIO CHORD
FILL-IN
NORMAL/
FILL-IN
VARIATION/
ENDING
SYNCHRO/
MUSICAL INFOMATION SYSTEM
10 DSP
2HD/DD FLOPPY DISK DRIVE
2HD/2DD FLOPPY DISK DRIVE
BASS REFLEX SPEAKER SYSTEM
789
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123
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SYNTH
DELETE
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TRANSPOSE/TUNE/MIDI
TOUCH RESPONSE
DISK
/YES
GENERAL
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GM SOUND KEYBOARD
CTK-731
JULY.1999
CTK-731
Ver.3: Dec. 2007
INDEX

Casio CTK-731 Specifications

General

Number of Keys	61
Polyphony	32
Display	LCD
Touch Response	Yes
Lesson Function	Yes
Song Bank	50
Built-in Songs	50
MIDI	Yes
USB	Yes
Effects	Reverb, Chorus
Terminals	Headphone, Sustain, AUX IN
Power Supply	AC Adapter or Batteries

Summary

Specifications

General Specifications

Details keyboard, tones, polyphony, effects, and accompaniment features.

Block Diagram

Circuit Description

Keyboard Input and Control Circuits

Memory, Reset, and Power Circuits

Covers memory devices, reset logic, and power supply circuits.

DSP and DAC Circuits

Explains the Digital Signal Processor and Digital Analog Converter circuits.

CPU Details

Details CPU pin functions, I/O, and interface signals.

Audio Output Circuits

Details the DAC and power amplifier circuits.

Diagnostic Program

Diagnostic Mode Entry and Button Check

How to enter diagnostic mode and check button functionality.

Bender and AC Adaptor Checks

Keyboard, ROM, and RAM Tests

Parts List

MA1 M and MA2 M PCB Components

Schematic Diagrams

Main and Sub PCB Schematics