KYE Systems Corp. SW-Flat 2.1 500 Manual de usuario

Service Guide SW-Flat 2.1 500

Version : 1.0 Page 1of 16

SERVICE GUIDE

KYESYSTEMS CORP.

SW-Flat 2.1 500

Version : 1.0

jomi

Service Guide SW-Flat 2.1 500

Version : 1.0 Page 2of 16

Revision History

Version Date Change

1.0 07/27/2004

jomi

Service Guide SW-Flat 2.1 500

Version : 1.0 Page 3of 16

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 Volume , Bass no function .……….……………...8

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

1.2.4 Head-sets no sound ……………………………….9

Chapter 2. Specifications …………………………………………………………10

Chapter 3. Block Diagram ……………………………………………………….11

Chapter 4. Exploded View ……………………………………………………….12

Chapter 5. Part List ………………………………………………………………14

Chapter 6. Schematic Diagram …………………………………………………..15

Chapter 7. Important Notes ………………………………………………………16

7.1 Packing Requirement for Sending the PCB Assembly by Post …..16

7.2 Short of Spare Parts while Repairing a Speaker System …………16

jomi

Service Guide SW-Flat 2.1 500

Version : 1.0 Page 4of 16

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 .

jomi

Service Guide SW-Flat 2.1 500

Version : 1.0 Page 5of 16

Chapter 1. How to Handle Defective Returns

1.1 Overview

Verifying problems &

Proceeding necessary tests

Receiving Defective speakers form

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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Service Guide SW-Flat 2.1 500

Version : 1.0 Page 6of 16

1.2 Problems

Item Problem Description

1.2.1 One or more channels no sound

1.2.2 Volume , Bass no function

1.2.3 Power LED (indicator) no light

1.2.4 Head-sets no sound

jomi

Service Guide SW-Flat 2.1 500

Version : 1.0 Page 7of 16

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-U3

Speaker cable dis-connect or

speaker damaged

Check solder points on

PCB Check and

Replace defective

Re-connect speaker cable

or replace defective

speaker(s)

Analyzer and

Identify the Causes

jomi

Service Guide SW-Flat 2.1 500

Version : 1.0 Page 8of 16

1.2.2 Volume , Bass no function

Problem

Solutions

1.2.3 Power LED (indicator) no light

Problem

Solutions

Volume , Bass no function

Broken or short circuit

Defective VR1 , VR2

Check solder points on PCB

Analyzer and

Identify the Causes

Power LED (indicator) no light

Power switch or LED

defective

DefectiveD1-D2,

D5-D6

DC cord of adaptor

disconnected or defective

Resolder or replace

defective component(s)

Analyzer and

Identify the Causes

Check and Replace defective

components

jomi

Service Guide SW-Flat 2.1 500

Version : 1.0 Page 9of 16

1.2.4 Head-sets no sound

Problem

Solutions

Head-sets no sound

Broken or short circuit

Defective T1 , R11 , R12

Check solder points on PCB

Analyzer and

Identify the Causes

Check and Replace defective

components

jomi

Service Guide SW-Flat 2.1 500

Version : 1.0 Page 10 of 16

Chapter 2. Specifications

SATELLITE(AT 1KHz)：

NO.

Description Unit

Specifications

1Out Power at THD 10% W≧2.3

2Sensitivity mV

350 ±50

3Freq. Response (Ref:-3dB) Hz 400Hz ~ 20KHz

4Separation dB ≧-30

5S/N ratio dB ≧-45

6Hum & Noise Vol:max mV

10 ~ 15

7Hum & Noise Vol:min mV

5 ~ 10

HOST(WOOFER)(AT 100Hz)：

NO.

Description Unit

Specifications

1Out Power at THD 10% W≧8.7

2Sensitivity mV 320 ±50

3Freq. Response (Ref:-3dB)

Hz 60Hz ~ 300Hz

4S/N ratio dB ≧-40

5Hum & Noise Vol:max mV 15 ~ 20

6Hum & Noise Vol:min mV 10 ~ 15

jomi

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