KYE Systems Corp. Genius SW-5.1 1010

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

This document is a service guide for a speaker system, likely a 5.1 channel setup, manufactured by KYE SYSTEM CORP. The guide provides information for servicing and troubleshooting the device, including specifications, block diagrams, exploded views, part lists, and schematic diagrams.

Function Description

The device is a multi-channel speaker system, indicated by the 5.1 channel references in the part list and the presence of front, rear, center, and subwoofer components. It includes a main subwoofer unit, satellite speakers, and a remote control. The system is designed to produce audio output, likely for entertainment purposes such as home theater or gaming. The block diagram shows inputs for stereo, front, rear, and center/subwoofer audio, which are processed through a master volume control (BT2258) and an MCU control (MK6A11P). The audio signals are then amplified by TEA2025B for the woofer and BT2025B for the satellite speakers before being output to the respective speaker units. The remote control allows for wireless operation of the system.

Important Technical Specifications

The service guide provides detailed specifications for both the satellite speakers and the subwoofer.

Satellite Speakers:

Rated Output Power (@THD 10%): 3.2 W per channel (CEN, FR, FL, SR, SL).
Sensitivity (1kHz) @Rated O/P Power: 500 mV (CEN, FR, FL, SR, SL).
Sensitivity (1kHz) @1W O/P Power: 245 mV (CEN), 290 mV (FR), 290 mV (FL), 285 mV (SR), 285 mV (SL).
Max Input Level @1% THD: 330 mV (CEN, FR, FL, SR, SL), 380 mV (FR, FL, SR, SL).
Frequency Response (1kHz -3dB):
- LOW: 240 Hz.
- HI: 185 KHz.
S/N Ratio @Rated O/P Power: 74 dB.
Channel Unbalance @REF O/P Power: 0.6 dB.
Channel Separation (One Channel In, Other Channel Input Shorting): 34 dB.
Hum Noise (Volume Max, Input Shorting): 0.9 mV.
Hum Noise (Volume Min Input Shorting): 0.7 mV.

Subwoofer:

Rated Output Power (@100Hz(10%THD)): 6.3 W.
Sensitivity (100Hz) @Rated O/P Power: 130 mV.
Sensitivity (100Hz) @1W O/P Power: 40 mV.
Max Input Level @1% THD: 100 mV.
Distortion @100Hz REF O/P Power: 0.8 %.
Frequency Response (100Hz -3dB) LOW: 38 Hz.
Frequency Response (100Hz -3dB) HI: 260 Hz.
S/N Ratio @100Hz Rated O/P Power: 72.5 dB.
VR Min Noise (Input Shorting): 1.1 mV.
VR Max Noise & Hum (Input Shorting): 1.5 mV.

Usage Features

The device is a speaker system that requires proper setup and handling. The guide emphasizes safety precautions, such as placing speakers on a stable surface, avoiding extreme environments (mist, smoke, vibration, excessive dust, corrosive gases), preventing drops or jolts, and ensuring good heat dissipation. It also warns against allowing foreign substances into the subwoofer's ventilator to prevent electric shock or fire. Maintenance should not be performed with wet hands.

The system includes a remote control for operation, which is covered in the troubleshooting section. Issues like "No power, LED (indicator) no light," "No sound" from various channels (front, rear, woofer, center), "Noise," "LED indicators no light," and "Remote control not work, volume switch no use" are addressed with flowcharts for diagnosis and repair.

Maintenance Features

The service guide is primarily focused on maintenance and repair procedures. It outlines a systematic approach to handling defective returns, starting with verifying problems, analyzing malfunction causes, deciding on rectification methods, replacing necessary defective parts, and then verifying the repair.

Troubleshooting Flowcharts: The guide provides detailed flowcharts for common problems, including:

No power, LED unlighted: Diagnoses include defective power switch, transformer, AC cable, poor connections (JK2, JK4), dried-soldered PT1 in PCB, or damaged/loose IC7 in PCB. Solutions involve repair or replacement of these components.
No sound: Diagnoses include damaged/dry-soldered/short-circuited PCB, poor connection between JK2 and JK4, or damaged/defective ICs (IC1-IC6). Solutions involve repair, resoldering, or replacement.
Front/Rear/Woofer/Center channel no sound: Similar to "No sound," these sections diagnose issues with specific driver units, speaker cables, output jacks, and associated ICs (IC1, IC3, Q1, Q2 for front; IC1, IC4, Q3, Q4 for rear; IC1, IC6, Q6 for woofer; IC1, IC5, Q5 for center). Solutions involve replacement or repair of the affected components.
Noise: Diagnoses include filter capacitor issues (not working, dry-soldered, damaged), vibration from too long lead wire of driver units, damaged driver units, dried-soldered/short-circuited PCB, abnormal power supply, or damaged ICs (IC1-IC6). Solutions involve repair or replacement.
LED indicators no light: Diagnoses include damaged LED1, R11, defective connection between JK4 and JK2, or dried-soldered/broken PCB. Solution is to check and replace.
Remote control not work, volume switch no use: Diagnoses include low power supply to batteries, loose/broken spring inside the remote, non-functional keystrokes, poorly soldered IC foot, defective/dried-soldered remote PCB, damaged REM1, IC2, CC9 in AMP PCB, or defective connection between JK4 and JK2. Solutions involve checking and replacing.

Packing Requirements for PCB Assembly: The guide emphasizes the importance of proper packing for PCB assemblies when sending them by post. This includes using separate static-protecting bags for each PCB to prevent static electricity damage and ensuring reliable external packing to avoid loss or damage during transit.

Spare Parts Management: For situations where spare parts are scarce, the guide suggests taking necessary parts from one speaker system to repair others, maximizing the number of functional speaker systems.

The document also includes detailed exploded views and part lists for the subwoofer, satellite speakers, and remote control, which are crucial for identifying and ordering replacement parts during maintenance. Schematic diagrams for the input and MCU PCB, SATAMP PCB, and SWAMP PCB provide circuit-level details for advanced troubleshooting and repair.