KYE Systems Corp. Genius SP-HF2.0 1250 Manuel utilisateur

ServiceGuide SP-HF2.0 1250

SERVICE GUIDE

KYESYSTEMS CORP.

SP-HF2.0 1250

Version : 1.0

Version : 1.0 Page 1 of 15

ServiceGuide SP-HF2.0 1250

RevisionHistory

Version Date Change

1.0 02/03/2005

Version : 1.0 Page 2 of 15

ServiceGuide SP-HF2.0 1250

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 , Treble, Bass no function……..…………..8

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

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

Chapter 4. Exploded View ……………………………………………………….11

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 SP-HF2.0 1250

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 SP-HF2.0 1250

Chapter 1. How to Handle Defective Returns

1.1 Overview

Version : 1.0 Page 5 of 15

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

Verif

if the s

eaker is

functionin

normall

etu

spea

ope

repackaging to customers

Function NG

Function OK

Function NG

ServiceGuide SP-HF2.0 1250

1.2 Problems

Item Problem Description

1.2.1 Oneormorechannelsnosound

1.2.2 PowerLED(indicator)nolight

Version : 1.0 Page 6 of 15

1.2.3 Volume,Treble,Bassnofunction

ServiceGuide SP-HF2.0 1250

Attention

1.2.1 One or more channels no sound

Problem

Solutions

Version : 1.0 Page 7 of 15

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~U4 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

ServiceGuide SP-HF2.0 1250

1.2.2 Power LED (indicator) no light

Problem

Solutions

1.2.3 Volume , Treble , Bass no function

Problem

Solutions

Version : 1.0 Page 8 of 15

Power LED (indicator) no light

Power switch or LED Defective,D1-4,

ZD1,ZD2,R37,R3

8,R47

AC cord of transformer

disconnected or

defective

Re-solder or replace

defective component(s)

Analyzer and

Identify the Causes

Volume , Treble ,Bass no

function

Broken or short circuit DefectiveU1,VR1,VR2,

VR3, R11-12,R1-2,

Check solder points on PCB

Analyzer and

Identify the Causes

Check and Replace defective

components

ServiceGuide SP-HF2.0 1250

Chapter 2. Specifications

NO. Description Unit Specifications

1 Out Power at THD 10% W ≧20

2 Sensitivity mV 300 ±70

3 Freq. Response (Ref:-3dB) Hz 20Hz~20KHz ±10%

4 Separation dB ≧40

5 S/N ratio dB ≧50

6 Hum & Noise Vol:max mV ≦10

Version : 1.0 Page 9 of 15

ServiceGuide SP-HF2.0 1250

Chapter 3. Block Diagram

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AUDIO IN

Bass

Control

Power

Amplifier

Host Speaker

AC IN

Satellite Speaker

Treble

Control

Volume

Control

Transformer Filter

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