KYE Systems Corp. Genius SW-S2.1 900

Need help?

Do you have a question about the KYE Systems Corp. Genius SW-S2.1 900 and is the answer not in the manual?

Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

This document is a service guide for the KYE Systems Corp. SW-S2.1 900 speaker system. It provides detailed information for handling defective returns, technical specifications, block diagrams, exploded views, part lists, and schematic diagrams, along with important notes for maintenance and repair.

Function Description

The SW-S2.1 900 is a 2.1 channel speaker system designed for audio playback. It consists of a woofer unit and two satellite speakers (left and right). The system includes volume and bass controls, and an audio input. The woofer unit houses the main power amplifier, transformer, rectifier, and filtering components, while the satellite speakers handle the higher frequency audio output. The system is designed to provide amplified sound from an audio input source.

Important Technical Specifications

The speaker system comprises a woofer and two satellite speakers, each with distinct specifications:

Woofer:

Out Power at THD 10%: ≥ 16 Watts
Sensitivity: 170 ± 50 mV
Freq. Response (Top -3dB): 23 ~ 210 ± 10% Hz
S/N ratio: ≥ 60 dB
Hum & Noise (Vol.: max): ≤ 2 mV

Satellite:

Out Power at THD 10%: 3 ± 0.5 Watts
Sensitivity: 430 ± 50 mV
Freq. Response (Top -3dB): 145 ~ 20K ± 10% Hz
Separation: ≥ 40 dB
S/N ratio: ≥ 70 dB
Hum & Noise (Vol.: max): ≤ 2 mV

The system includes various integrated circuits (ICs) such as SJ4558, LM7812CV, TEA2025B, and TDA2007A, which are crucial for audio processing and amplification. Different transformer configurations are available for various voltage standards (120V, 230V, 240V).

Usage Features

The SW-S2.1 900 speaker system is designed for straightforward audio playback. Users connect an audio source to the "AUDIO IN" port, and the system amplifies and outputs the sound through the woofer and satellite speakers. The system features dedicated controls for volume and bass, allowing users to adjust the audio output to their preference. A power LED indicator provides visual feedback on the system's operational status. The design emphasizes ease of use with basic audio input and output functionalities.

Maintenance Features

The service guide provides comprehensive information for troubleshooting and repairing the SW-S2.1 900 speaker system.

Troubleshooting Flowcharts:

"One or more channels no sound": This problem can be addressed by checking for broken or short circuits, defective ICs (IC1, IC2, IC3, U6, U7), remote control cable issues, disconnected speaker cables, or damaged speakers. Solutions involve checking solder points on the PCB, replacing defective ICs, or reconnecting/replacing speaker components.
"Power LED (indicator) no light": This issue points to a defective power switch or LED, defective diodes (D1-D4), switch (SW1), IC (IC1), resistor (RL), remote control cable, or a disconnected/defective AC cord of the transformer. Solutions include re-soldering or replacing defective components.
"Volume, Bass no function": This problem suggests a broken or short circuit, or defective potentiometers (VR1 for Volume, VR2 for Bass). Solutions involve checking solder points on the PCB or replacing defective components.

Exploded Views and Part List: Detailed exploded views for the woofer, R. Satellite (Control), and L. Satellite are provided, showing the assembly of various components. A comprehensive part list includes descriptions, quantities, units, and part numbers for all major components, such as speakers, EVA pads, rubber pads, various ICs (SJ4558, LM7812CV, TEA2025B, TDA2007A), transformers, and packaging materials. This information is critical for identifying and ordering replacement parts.

Schematic Diagram: A full schematic diagram of the SW-S2.1 900 is included, illustrating the electrical connections and components, which is essential for advanced troubleshooting and repair by technicians.

Important Notes for Maintenance:

Packing Requirement for Sending the PCB Assembly by Post: Emphasizes the need for careful packing of PCB assemblies due to their sophisticated electronic components. Each PCB assembly should be placed in a separate static-protecting bag to prevent damage from static electricity. Reliable external packing is also crucial to avoid loss or damage during transit.
Short of Spare Parts while Repairing a Speaker System: Recommends cannibalizing necessary parts from one speaker system to repair others if spare parts are scarce, to maximize the number of functional speaker systems.

Safety Precautions: The guide outlines several safety precautions to be observed during handling and maintenance:

Place speakers on a flat, level, and stable surface.
Avoid environments with mist, smoke, vibration, excessive dust, salty/greasy air, or corrosive gases.
Do not drop or jolt the speakers.
Prevent objects from falling into the subwoofer's ventilator to avoid electric shock or fire.
Ensure adequate heat dissipation by placing the unit away from other equipment.
Disconnect the AC power cord before any maintenance.
Do not perform maintenance with wet hands.
Prevent foreign substances (water, liquids, chemicals) from entering the speakers during maintenance.