KYE Systems Corp. Genius SP-i205U Manuale utente

ServiceGuide SP-i205U

Version : 1.0 Page 1 of 14

SERVICE GUIDE

KYESYSTEMS CORP.

SP-i205U

Version : 1.0

ServiceGuide SP-i205U

Version : 1.0 Page 2 of 14

RevisionHistory

Version Date Change

1.0 21/5/2009

ServiceGuide SP-i205U

Version : 1.0 Page 3 of 14

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

Chapter 5. Part List ………………………………………………………………12

Chapter 6. Schematic Diagram …………………………………………………..13

Chapter 7. Important Notes ………………………………………………………14

7.1 Packing Requirement for Sending the PCB Assembly by Post …..14

7.2 Short of Spare Parts while Repairing a Speaker System …………14

ServiceGuide SP-i205U

Version : 1.0 Page 4 of 14

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 USB cable from USB jack 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 .

ServiceGuide SP-i205U

Version : 1.0 Page 5 of 14

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

Verif

if the s

eaker is

functioning normally

Return the speakers with proper

repackaging to customer

Function NG

Function OK

Function NG

ServiceGuide SP-i205U

Version : 1.0 Page 6 of 14

1.2 Problems

Item Problem Description

1.2.1 Oneormorechannelsnosound

1.2.2 PowerLED(indicator)nolight

1.2.3 Volume no function

ServiceGuide SP-i205U

Version : 1.0 Page 7 of 14

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 Speaker damaged

Check solder points on

PCB

Check and Replace

defective IC , VR

Replace defective

speaker(s)

Analyzer and

Identify the Causes

ServiceGuide SP-i205U

Version : 1.0 Page 8 of 14

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

U1, Q1, Q2

USB cable disconnected

or defective

Re-solder or replace

defective component(s)

Analyzer and

Identify the Causes

Volume no function

Broken or short circuit Defective U1, SW1, SW3

Check solder points on PCB

Analyzer and

Identify the Causes

Check and Replace defective

components

Check the

USB cable

ServiceGuide SP-i205U

Version : 1.0 Page 9 of 14

Chapter 2. Specifications

NO. Description Unit Specifications

1 Out Power at THD 10% W 1

(Actual ≧0.6)

2 Freq. Response (1KHz -3dB) Hz 20~20K ± 10%

3 Separation dB ≧40

4 S/N ratio dB ≧70

5 Hum & Noise (Vol.: max) mV ≦ 2

ServiceGuide SP-i205U

Version : 1.0 Page 10 of 14

Chapter 3. Block Diagram

USB

speaker

chip

R.CH Speaker

L.CH Speaker

USB port

Keys

( Power , Volume + , Volume - )

Indice

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