Korg Wavestation User Manual

SERVICE
MANUAL
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CONTENTS
1.
SPECIFICATIONS
1
2.
STRUCTURAL
DIAGRAM 2
3.
HOW
TO
DISASSEMBLE 5
4. HOW
TO
CHANGE
VR
OF
CONTROL
WHEEL
8
5.
BLOCK
DIAGRAM 9
6.
CIRCUIT
DIAGRAM
10
7. P.C.
BOARDS
23
8.
DIAGNOSTIC
TEST
31
9. IC
CHECK
POINT
40
10.
REFERENCE
DATA
45
11. PARTS
LIST 56

Korg Wavestation Specifications

General

Polyphony	32 voices
Release Year	1990
Synthesis Type	Vector synthesis
Oscillators	4 per voice
Effects	Digital effects including reverb, chorus, delay
Keyboard	61 keys (velocity and aftertouch sensitive)
Filter	Digital Filter
LFO	2 LFOs
MIDI	In, Out, Thru
Outputs	Stereo Output

Summary

Specifications

Structural Diagram

How to Disassemble

How to Change VR of Control Wheel

MG Wheel VR Replacement

Procedure for replacing the Variable Resistor (VR) on the MG Wheel.

Pitch Wheel VR Replacement

Procedure for replacing the Variable Resistor (VR) on the Pitch Wheel.

Block Diagram

Circuit Diagram

P.C. Boards

Diagnostic Test

Panel Switch and LED Check

Verifies the correct operation of panel switches and LEDs during diagnostics.

LCD Pixel Test

Confirms the functionality of all pixels on the Liquid Crystal Display.

MDE, DF88, TG88 Component Tests

Tests the MDE, DF88, and TG88 integrated circuits and associated circuitry.

Output Noise Level Test

Measures the noise floor of the audio output channels.

Output Distortion Test

Evaluates the distortion levels of the audio output signals.

Keyboard and Aftertouch Test

Checks the responsiveness and functionality of the keyboard and aftertouch.

A/D Converter Test

Verifies the performance of the Analog-to-Digital converter.

IC Check Point

Reference Data

Parts List