KYE Systems Corp. Genius SP-U115 User manual

Service Manual SP-U115

Service Manual

KEY SYSTEM CORP

Version No.：1.0 Page:1 of 17

2011-8-18

Version No.：1.0 Page:2 of 17

Service Manual SP-U115

Revision

Change History：

Version Date

1.0

Chapter II: Product specifications……………………………………..12

Main/sub-speaker……………………………………………………………12

Chapter III: Flowchart …………………………………………………….13

Chapter IV: Assembly drawing………………………………………….14-15

Main speaker…………………………………………………………………16

Satellite speaker………………………………………………………….14

Main speaker…………………………………………………………………15

Chapter V: Parts list……………………………………………………….16

Satellite speaker………………………………………………………….16

Chapter VI: Schematic circuit diagram………………………………….17

Version No.：1.0 Page:3 of 17

1.2.4 Hum and current noise…………………………………………….10

1.2.5 Power light is off………………………………………………..11

1.2 Errors…………………………………………………………………….6

1.2.1 No power and indicator is off…………………………………..7

1.2.2 No sound …………………………………………………………..8

1.2.3 Left or right channel error…………………………………….9

Starting to use…………………………………………………………………4

User guide………………………………………………………………………4

Safety instruction……………………………………………………………4

Chapter I: How to dispose the rejected products……………………..5

Service Manual SP-U115

Table of Contents：

File version ……………………………………………………………………2

Contents………………………………………………………………………….3

Put the speaker far away from other electric appliances, so as to realize

heat dissipation better;

Do not use wet hands and prevent foreign objects entering the speaker

during maintenance, such as water or other chemical fluids.

atmosphere (with smoke, vibration, salt or oil), as well as smog;

Never throw or strike the speaker;

Prevent foreign objects going into the subwoofer via the inverted tube;

otherwise, it may cause electric shock or fire;

Please strictly follow the rules below when working with the speaker:

User guide：

Important: This instruction is intended to keep in mind and prevent

errors.

Warning: The information prohibited may damage the product.

Safety instruction：

Service Manual SP-U115

Place the speaker levelly and do not expose to harmful and corrosive

Version No.：1.0 Page:4 of 17

Starting to use

Version No.：1.0 Page:5 of 17

Service Manual SP-U115

Test NG Test is OK

Chapter I. How to dispose the rejected products

1.1 Overview

Functional test with error

Receive the rejected speaker

from customer

Replace some parts of the rejected

if necessary

Figure out practicable

maintenance

Analyze potential

causes

Repack the qualified product

and send to the customer

Verify and implement

test if necessary

Test again

1.2.1

1.2.2

1.2.3

1.2.4

1.2.5

Version No.：1.0 Page:6 of 17

Service Manual SP-U115

Description

1.2 Errors

NO power and indicator is off

NO sound

Left or right channel error

Hum and current noise

LED indicator is off

Version No.：1.0 Page:7 of 17

*Notice

For maintenance, please take the sequence of single flow chart

below.

Service Manual SP-U115

It is the optimal sequence recommended for solution.

1.2.1 No power and LED indicator is off

1.Welding of power cord is bad;

2.The power plug is out of

contact;

3.CON4 plug becomes loose and

copper foil is broken;

4. The lines of power are bad;

5.Connecting wire of CON4 is

open circuit;

6.LED indicator is bad or

damaged;

No power/LED

indicator is off

The power plug is out

of contact

Inspect/repair Inspect/repair/repl

ace

Version No.：1.0 Page:8 of 17

Service Manual SP-U115

1.2.2 No sound

无声

1.PCB板短路/断路/无

电引起；

2.连接线损坏或本身不

良，短路/开路

CON1/CON2/CON3

1.J2/J3/D10/Q2本身不

良或损坏；

2.电位器VR1损坏；

3.线路板插头与插座松

脱，接触不良；

4.耳机插座JK1损坏或者

本身不良。

1.PCB板声音通道单元元

件损坏,U1，

JK1,C11,VR1,J2,J3，

Q1,Q2,Q3,D10喇叭引

线，喇叭坏；

No sound

1.It is due to PCB

short circuit /open

circuit/no

electricity;

2.The connecting

wire is inferior or

damaged, short

circuit/open circuit

CON1/CON2/CON3

1.J2/J3/D10/Q2 is bad

or damaged;

2.Potentiometer

VR1 is damaged;

3.PCB plug becomes

loose, or in poor

contact.

Inspect/repair Inspect/repair/replace

1.PCB sound channel

unit elements are

damaged. Speaker and

lead of U1，U2，VR1

are damaged.

Inspect/repair

Version No.：1.0 Page:9 of 17

1.2.3 Left or right channel error

Service Manual SP-U115

Left/right channel error

1.PCB is short

circuit/open circuit,

or damaged;

2.Signal input line of

left/right channel is

bad or damaged;

3.Signal output line

of left/right channel

is bad or damaged.

1.Speaker of

left/right channel

is bad or damaged;

2.Signal output

line of left/right

channel is not set

properly.

Inspect/repair/repl

ace Inspect/repair

1.PCB sound channel

unit elements are

damaged.Speaker and

lead of U1，

U2,JK1,C11,VR1,J2,J

3,Q1,Q2,Q3 and D10

are damaged.

Replace/repair

1.2.4 Hum and current noise

Version No.：1.0 Page:10 of 17

Service Manual SP-U115

Hum and current

noise

Power supply is

poor; filter

capacitor C22 is

damaged to cause

abnormal

interference of

voltage ripple by

power supply IC; PCB

is affected with

damp, polluted or

broken.

Signal earth line

of CON2 is bad

contact.

Inspect/repair/replace Inspect/repair/replace

Potentiometer is

in use for long

time; spring is

bad contact when

turning knob.

Replace/repair

Table of contents

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