KYE Systems Corp. Genius SW-5 1 1500

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Summary

Getting Started

Conventions Used in this Guide

Explains symbols and notation used throughout the guide for clarity and safety.

Safety Precautions

Lists essential safety measures to follow when handling the speaker system.

Chapter 1. How to Handle Defective Returns

1.1 Overview

Outlines the general workflow for receiving and processing defective speaker returns.

1.2.1 Power LED (indicator) unlight

Details steps to diagnose and fix issues where the power LED does not illuminate.

1.2.2 Does not work or one channel no sound

Provides solutions for the speaker system not functioning or having no sound on one channel.

1.2.3 Noise

Offers methods to identify and resolve audio noise issues in the speaker system.

1.2.4 Treble level too low or no effect

Guides on fixing problems related to low treble or lack of treble effect in the audio output.

1.2.5 Bass level too low or no effect

Provides solutions for issues with insufficient bass levels or lack of bass effect in the audio.

1.2.6 Headphone does not work

Explains how to troubleshoot and repair the headphone output functionality.

Chapter 8. Important Notes

8.1 Packing requirement for sending the PCB assembly by post

Details proper packaging procedures for shipping PCB assemblies to prevent damage.

8.2 Short of spare parts while repairing a speaker system

Provides guidance on managing spare parts when repairing multiple speaker systems.

This document serves as a comprehensive service guide for the KYE Systems Corp. SW-5.1 1500 speaker system, providing essential information for troubleshooting, repair, and maintenance.

Function Description:

The KYE Systems Corp. SW-5.1 1500 is a 5.1 channel speaker system designed to deliver immersive audio. It comprises a subwoofer, a center speaker, two front speakers, and two rear speakers, along with a wired remote control for managing various audio settings. The system is equipped with a power amplifier to drive the individual speaker units and includes a volume control section for adjusting overall sound levels, as well as specific controls for bass and treble. It also features a headphone output for private listening. The system processes 5.1 channel audio input, filters the incoming AC power, and incorporates a standby function for power efficiency.

Important Technical Specifications:

The SW-5.1 1500 system boasts several key technical specifications:

Input Sensitivity at 10% Distortion:
- Subwoofer: 242 mV
- Center: 427 mV
- Front: 427 mV
- Rear: 343 mV
Distortion:
- At 1 KHz: 0.1% (limit)
- At 100 Hz: 0.1% (limit)
Output Power at 10% Distortion:
- Subwoofer: 22.34 W
- Center: 6 W
- Front: 6 W
- Rear: 6 W
S/N Ratio:
- Subwoofer: 78 dB
- Center: 72 dB
- Front: 70 dB
- Rear: 72 dB
Frequency Response (Down 3dB):
- Subwoofer: 20~145 Hz
- Center: 100~50K Hz
- Front: 90~46K Hz
- Rear: 100~46K Hz
Hum Level (at Vol. Max.):
- Subwoofer: 1.1 mV
- Center: 0.9 mV
- Front: 0.7 mV
- Rear: 0.9 mV
Operating Voltage: Max. 255 VAC, Min. 205 VAC
Test Conditions:
- Load: Subwoofer / Front / Rear / Center 4 Ω
- Rated Power: 500 mW (Satellite), 5.0 W (Subwoofer)
- Volume at Max.
- AC 230 V / 50 Hz

The system's internal components include various integrated circuits (ICs) such as YD1519B, YG4558, TFA9842J, D2822A, and SJ3358, along with diodes (1N5401, 1N4148, BZX2C 12, 6.8V), inductances, heat sinks, and potentiometers (VR, RC09N-1V-18FO-B503-EP) for volume, bass, and treble control. It utilizes a transformer (230V/50Hz, 12V/1.8A & 14V/2A) for power supply. The speakers themselves consist of a 5.25" 4Ω 20-30W woofer for the subwoofer and 3" 4W 5-7W magnetically shielded speakers for the satellite units.

Usage Features:

The SW-5.1 1500 is designed for ease of use with a wired remote control that provides access to power, volume, bass, and treble adjustments. The system includes a power LED indicator to show its operational status. It supports 5.1 channel audio input, making it suitable for home theater setups or gaming. A headphone jack allows for personal listening without disturbing others. The system's block diagram illustrates the signal flow from the 5.1 channel input through volume control and power amplification stages to the respective speaker channels (Front Left, Front Right, Surround Left, Surround Right, Center, and Subwoofer). An AC input with a filter ensures clean power delivery.

Maintenance Features:

This service guide provides a structured approach to identifying and resolving common issues, making maintenance straightforward.

Troubleshooting Flowcharts: Detailed flowcharts are provided for various problems, including:
- Power LED (indicator) Unlight: Guides technicians to check the secondary wire of the transformer, diodes (D1-D4), and the power switch or LED.
- Does not work or one channel no sound: Directs checks of the audio cable, for broken or short circuits, and defective ICs (U1 or U2).
- Noise: Focuses on defective VR3 and ICs (U1 or U2).
- Treble level too low or no effect: Points to defective VR1 or specific resistors (R15, R20) and capacitor (C5).
- Bass level too low or no effect: Highlights defective VR2 or specific resistors (R6, R12, R22, R23) and capacitors (C20, C34, C35).
- Headphone does not work: Suggests checking the phone jack connection and resistors (R1 or R2).
Component Replacement: For each problem, the solutions typically involve resoldering or replacing defective components, such as audio cables, ICs, VRs, diodes, resistors, and capacitors.
Exploded View and Part List: An exploded view diagram (Chapter 4) and a comprehensive part list (Chapter 5) with Mfr's Part Numbers are included to facilitate easy identification and ordering of replacement parts. Key parts like AC power cords, speaker cables, audio cables, switches, and various ICs are also listed in Chapter 6.
Schematic Diagrams: Detailed schematic diagrams (Chapter 7) are provided, showing the interconnections and values of all resistors and capacitors, which are crucial for in-depth circuit analysis and repair. Notes specify that resistance values are in Ohms (Ω) and capacitance values are in microfarads (uF).
Safety Precautions: The guide emphasizes safety during maintenance, advising users to place speakers on stable surfaces, avoid hazardous environments (mist, smoke, vibration, dust, corrosive gases), prevent drops, ensure nothing falls into the subwoofer ventilator, provide good heat dissipation, disconnect AC power before maintenance, avoid wet hands, and prevent foreign substances from entering the speakers.
Packing Requirements for PCB Assembly: For sending PCB assemblies by post, it is crucial to pack each PCB with a separate static-protecting bag to prevent damage from static electricity. Reliable external packing is also recommended to avoid loss or physical damage during transit.
Spare Parts Management: In situations where spare parts are scarce for multiple speaker systems awaiting repair, the guide suggests cannibalizing necessary parts from one system to repair others, maximizing the number of functional units.

This service guide is an indispensable resource for technicians and service personnel, ensuring efficient and effective repair and maintenance of the KYE Systems Corp. SW-5.1 1500 speaker system.