Genius SW-Flat2.1 700 Manuel utilisateur

ServiceGuide SW-Flat2.1 700

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SERVICE GUIDE

KYESYSTEMS CORP.

SW-Flat2.1 700

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ServiceGuide SW-Flat2.1 700

Version : 1.0 Page 2 of 15

Version : 1.0

RevisionHistory

Version Date Change

1.0 08/09/2007

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ServiceGuide SW-Flat2.1 700

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Table of Contents

Revision History …………………………………………………………………….2

Table of Contents ……………………………………………………………………3

Getting Started ………………………………………………………………………4

Conventions Used in this Guide ……………………………………….4

Safety Precautions ……………………………………………………..4

Chapter 1. How to Handle Defective Returns……………………………………..5

1.1 Overview …………………………………………………………..5

1.2 Problems …………………………………………………………...6

1.2.1 One or more channels no sound ………………..…7

1.2.2 Power LED (indicator) no light………………....…8

1.2.3 Volume no function...…………………….………..8

Chapter 2. Specifications …………………………………………………………9

Chapter 3. Block Diagram ……………………………………………………….10

Chapter 4. Exploded View …………………………………………………….11-12

Chapter 5. Part List ………………………………………………………………13

Chapter 6. Schematic Diagram …………………………………………………..14

Chapter 7. Important Notes ………………………………………………………15

7.1 Packing Requirement for Sending the PCB Assembly by Post …..15

7.2 Short of Spare Parts while Repairing a Speaker System …………15

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ServiceGuide SW-Flat2.1 700

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Getting Started

Conventions Used in this Guide

Pay Special Attention : Instructions that are important to remember and

may prevent mistakes .

Caution : Information that, if not followed, may result in damage to the

product .

Safety Precautions

The following precautions should be observed in handling the speaker

Described in this guide :

Place the speakers on a flat, level and stable surface.

Do not place the speakers in environments subject to mist, smoke,

vibration, excessive dust, salty or greasy air, or other corrosive gases

and fumes.

Do not drop or jolt the speakers.

Do not allow anything to drop into the subwoofer case through its

ventilator, as it could result in fatal electric shock or fire .

Place the unit far enough from other equipments for good heat

dissipation .

Disconnect the AC power cord from the AC outlet before performing

any maintenance on the speakers .

Do not perform any maintenance with wet hand .

Prevent foreign substances, such as water, other liquids or chemicals ,

From entering the speakers while performing maintenance procedures

on the speakers .

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ServiceGuide SW-Flat2.1 700

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Chapter 1. How to Handle Defective Returns

1.1 Overview

Verifying problems

Proceeding necessary tests

Receiving Defective speakers from

Customers

Analyzing possible malfunction

causes

Deciding & proceeding the

rectification methods

Replace necessary defective parts

Proceeding tests to

Verify if the speaker is

functioning normally

Return the speakers with proper

repackaging to customers

Function NG

Function OK

Function NG

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ServiceGuide SW-Flat2.1 700

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1.2 Problems

Item Problem Description

1.2.1 Oneormorechannelsnosound

1.2.2 PowerLED(indicator)nolight

1.2.3 Volumenofunction

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Attention

1.2.1 One or more channels no sound

Problem

Solutions

Please follow the numbered sequence marked within parenthesis given in individual

Flow chat, in that this is the best-recommended sequence to rectify the problems.

One or more channels no sound

Broken or short circuit

Defective U1, U2, U3

Speaker cable dis-connect or

speaker damaged

Check solder points on

PCB

Check and Replace

defective IC

Re-connect speaker cable or

replace defective speaker(s)

Analyzer and

Identify the Causes

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ServiceGuide SW-Flat2.1 700

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1.2.2 Power LED (indicator) no light

Problem

Solutions

1.2.3 Volume no function

Problem

Solutions

Power LED (indicator) no light

Power switch or LED defective

Defective :D1~D4,

Jack6,C37~38,U4,R1

AC cord of transformer

disconnected or defective

Re-solder or replace

defective component(s)

Analyzer and

Identify the Causes

Volume no function

Broken or short circuit

Volume: Defective VR, Jack1, Jack4, Jack5, U1,

C10~16..

Bass: Defective VR, Jack1, Jack4, Jack5,

U2,,U3, Q1,Q2,R19,.

Check solder points on PCB

Analyzer and

Identify the Causes

Check and Replace defective

components

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ServiceGuide SW-Flat2.1 700

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Chapter 2. Specifications

Woofer

NO. Description Unit Specifications

1 Out Power at THD 10% W ≧9

2 Sensitivity mV 720 ±50

3 Freq. Response (Ref:-3dB) Hz 60Hz ~ 400Hz

4 S/N ratio dB

≧40

5 Hum & Noise (Vol.: max) mV ≦ 10

Satellite

NO. Description Unit Specifications

1 Out Power at THD 10% W ≧3

2 Sensitivity mV 560 ±50

3 Freq. Response (Ref:-3dB) Hz 80Hz ~ 20KHz

4 Separation dB

≧30

5 S/N ratio dB

≧45

6 Hum & Noise (Vol.: max) mV ≦ 10

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ServiceGuide SW-Flat2.1 700

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Chapter 3. Block Diagram

AUDIO IN Volume

Control

Power

Amplifier

R. Satellite

L. Satellite

Woofer

Woof. Volume

DC IN Transformer &

Rectifier

FILTER

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