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Casio CTK-680 User Manual

Casio CTK-680
25 pages
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GM SOUND KEYBOARD
CTK-680
CTK-680
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Casio CTK-680 Specifications

General IconGeneral
Number of Keys61
Voices/Tones100
Rhythms100
DisplayLCD
Sound SourceAHL
Auto AccompanimentYes
Lesson FunctionYes
Power SupplyAC Adaptor or Batteries
KeyboardStandard
Speakers2
TerminalsHeadphone
Polyphony12 notes

Summary

Specifications

General Specifications

Key features, tones, polyphony, effects, musical pads, demo tunes, auto-accompaniment, and registration memory.

Electrical Specifications

Power supply, current drain, output levels, and minimum operating voltage.

Block Diagram

Circuit Description

Key Matrix and Button Matrix

Mapping of keyboard keys and control buttons to electrical signals.

Power Supply Circuit

Generation and distribution of internal power voltages.

Integrated Circuits

CPU, DSP, DAC, and Key Controller Details

Pin functions and roles of CPU, DSP, DAC, and Key Controller ICs.

Gate Array, Filter, and Amplifier Details

Details for Gate Array, Filter Block, and Power Amplifier ICs.

System Signals and Waveforms

LED Driving and Reset Circuit

Circuitry for LED indicators and system initialization sequence.

Major Waveforms

Visual representation of key electrical signals and their timing.

PCB Layouts and Schematics

Printed Circuit Boards Layouts

Layout diagrams for the main and sub PCBs.

Schematic Diagrams

Detailed electrical schematics for the main PCB.

Auxiliary Schematics

Sub, Console, and Keyboard PCB Schematics

Schematics for auxiliary PCBs including sub, console, and keyboard.

Assembly and Parts

Exploded View

Visual breakdown of the instrument's physical components.

Parts List

Comprehensive list of all replaceable parts with codes.

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