KYE Systems Corp. Genius SP-i220 User manual

ServiceGuide SP-i220

Version : 1.0 Page 1 of 15

SERVICE GUIDE

KYESYSTEMS CORP.

SP-i220

ServiceGuide SP-i220

Version : 1.0 Page 2 of 15

Version : 1.0

RevisionHistory

Version Date Change

1.0 22/10/2008

ServiceGuide SP-i220

Version : 1.0 Page 3 of 15

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 (Line in jack no

function) ………………………………………..…7

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

1.2.3 Volume , 3D no function...……….…….………….8

1.2.4 Headphone no function…………………………….9

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

ServiceGuide SP-i220

Version : 1.0 Page 4 of 15

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 adaptor 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 .

ServiceGuide SP-i220

Version : 1.0 Page 5 of 15

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

functionin

normall

Return the speakers with proper

repackaging to customers

Function NG

Function OK

Function NG

ServiceGuide SP-i220

Version : 1.0 Page 6 of 15

1.2 Problems

Item Problem Description

1.2.1 One or more channels no sound (Line in jack no function)

1.2.2 Power LED (indicator) no light

1.2.3 Volume , 3D no function

1.2.4 Headphone no function

ServiceGuide SP-i220

Version : 1.0 Page 7 of 15

Attention

1.2.1 One or more channels no sound (Line in jack no function)

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, VR Speaker cable

dis-connect , JACK1 or

JACK2 defective or

speaker damaged

Check solder joints on

PCB

Check and Replace

defective IC , VR

Re-connect speaker

cable or replace

defective speaker(s)

Analyzer and

Identify the Causes

ServiceGuide SP-i220

Version : 1.0 Page 8 of 15

1.2.2 Power LED (indicator) no light

Problem

Solutions

1.2.3 Volume , 3D no function

Problem

Solutions

Power LED (indicator) no light

Power switch or LED

defective

Defective

D1~D4, R14,

C14, C15, SW1

Ac adaptor disconnected

or defective

Re-solder or replace

defective component(s)

Analyzer and

Identify the Causes

Volume , Tone no function

Broken or short circuit Defective U1, VR, SW2, R8

Check solder joints on PCB

Analyzer and

Identify the Causes

Check and Replace defective

components

Check the

ac adaptor

ServiceGuide SP-i220

Version : 1.0 Page 9 of 15

1.2.4 Headphone no function

Problem

Solutions

Chapter 2. Specifications

NO. Description Unit Specifications

1 Out Power at THD 10% W ≧3

2 Sensitivity V 520 ±50

3 Freq. Response (Top -3dB) Hz 40~20K ± 10%

4 Separation dB ≧40

5 S/N ratio dB ≧70

6 Hum & Noise (Vol.: max) mV ≦ 2

Broken or short circuit Defective JACK2 , R12 , R13

Check solder joints on PCB

Analyzer and

Identify the Causes

Check and Replace defective

components

Headphone no function

ServiceGuide SP-i220

Version : 1.0 Page 10 of 15

Chapter 3. Block Diagram

Audio

Function

Power

Amplifier

R.CH Speaker

Ac in

L.CH Speaker

Power

Conditioner

Volume

ontrol

Table of contents

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