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Gakken SX-150 - User Manual

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Phillips screwdriver (No. 1)
AA alkaline batteries
(4 new)
Cellophane tape
● Take necessary caution when handling parts with pointed edges. There is a risk of injury.
There are many parts with pointed edges on the back side of the circuit board, so please take care that you do not get injured by getting a nger or
other body part caught on one of the sharp edges.
This kit includes screws and other small parts. Be careful not to swallow them. There is a risk of suocation.
This supplement uses AA alkaline batteries. Incorrect use of the batteries may cause the generation of heat, explosions or liquid leakage.
The following precautions should be taken.
● Please note that rechargeable NiCd batteries and non-rechargeable Oxyride and nickel-based batteries should not be used.
● Ensure that the positive and negative terminals of the batteries are aligned correctly.
● If liquid that leaked from the batteries gets into your eyes, rinse them well with plenty of water and consult a doctor immediately.
If liquid leaks onto your skin or clothes, wash it o immediately.
● Always remove the batteries after use.
● Please read the instructions and cautions thoroughly before trying it out.
● For your safety, be sure to follow the instructions in this manual. In addition, do not use any parts that have become damaged or deformed during
use.
● Always remove the batteries after use and place them in a location out of the reach of small children.
Notes for tightening
screws
The types of screws used for the
supplement are those that carve grooves
into the plastic as they are inserted
(self-threading). The screwdriver most
suited to tightening the screws is the #1 JIS
screwdriver. When tightening screws,
rmly press the provided screwdriver
straight against the screws and turn.
It is said that 70 percent of the force
applied is used for pushing against the
screw and 30 percent for turning it.
Precision screwdrivers are hard to turn, so
use a small screwdriver with a grip
diameter of about 2 cm.
Full-scale image
of a #1
screwdriver
Assembly time: Approximately 20 minutes
(The electric circuit comes pre-assembled,
so there is no need for soldering.)
* Please note that rechargeable NiCd
batteries and non-rechargeable Oxyride
and nickel-based batteries should not be
used due to a high risk of components
melting or re breaking out with these
batteries because of accidental
short-circuiting or the like. Additionally,
because this supplement was designed
based on operation at 6 V, it may not
operate in the desired way due to an
excess of or a deciency in voltage with
the above batteries. Incidentally, most
rechargeable batteries provide 1.2 V and
Oxyride batteries, 1.7 V.
Plastic materials used in this kit
Main unit/knobs: HIPS
Electrode handles: PE
Printed circuit boards/slider panel: Phenolic
resin
Metallic materials used in this kit
Electrodes: Iron (nickel plating)
Screws: Iron
1
How to Assemble and Use the Supplement
Things you will need
Parts in the Kit
Analog Synthesizer
Knobs (5)
Washer head screws (7)
Screws (3)
Main unit
Circuit
board
Slider panel
Speaker
(Wrapped in cardboard.)
Electrode
Cut out the cardboard
case to use as a back
cover.
Please be sure to read the following instructions before assembling this kit.
CAUTION
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Summary

Synthesizer Kit Contents and Preparation

Required Tools and Parts

Lists necessary tools like a screwdriver and components like batteries.

Battery Usage Guidelines

Important notes and warnings regarding the use of AA alkaline batteries.

Screw Tightening Technique

Guidance on using the correct screwdriver and applying force for proper screw tightening.

General Safety Precautions

Crucial safety advice concerning sharp edges, small parts, and battery handling.

Synthesizer Assembly and Basic Operation

Step-by-Step Main Unit Assembly

Detailed instructions for assembling the main unit of the analog synthesizer.

Initial Control Settings

Recommended knob and switch positions for producing initial sounds.

Troubleshooting Common Issues

Solutions for problems like no sound output or pitch control issues.

Understanding Synthesizer Functions

Key Component Descriptions

Explanations of LFO, PITCH ENV, CUTOFF, RESONANCE, ATTACK/DECAY, and OUTPUT controls.

Creating Sound Effects

Guidance on using controls to produce various sound effects and musical instrument sounds.

Synthesizer Operating Principles

Circuit Architecture and Signals

Overview of the synthesizer's circuit blocks and the types of sound and control signals used.

Core Component Mechanics

Detailed explanation of how VCO, VCF, EG, and LFO components function.

Gakken SX-150 Specifications

General IconGeneral
PolyphonyMonophonic
Oscillators1
WaveformsSawtooth, Square
FilterLow-pass
EnvelopesADSR
TypeAnalog
LFO1
KeyboardMini Keyboard
Power Supply6 AA batteries or AC adapter