KYE Systems Corp. Genius SP-i205U User manual

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

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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

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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 .

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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
y
if the s
p
eaker is
functioning normally
Return the speakers with proper
repackaging to customer
Function NG
Function OK
Function OK
Function NG

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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
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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

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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

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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

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Chapter 3. Block Diagram
USB
speaker
chip
R.CH Speaker
L.CH Speaker
PC
NB
USB port
Keys
( Power , Volume + , Volume - )

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Chapter 4. Exploded View

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Chapter 5. Part List
No. DESCRIPTION Qty UNIT Part No.
1 SP-i205U/Body 1 PC 28-101-01
2 Loud Speaker 48mm 4ohm 2W 2 PC E1049-42
3 Rubber Pad (32x3.4 mm), SP-i205U 2 PC 28-100-01
4 PCBA, SP-i205U 1 PC 28-101-02
5 IC, BU20360 1 PC E1065-47
6 S/N Label (on Body / Gift box) 2 PC 28-102-01
7 Gift Box, SP-i205U 1 PC 12000448100-A
8 Round Yellow Type Label (on Gift Box) 1 PC 28-102-02
9 Carton, SP-i205U 1/20 PC 12100280100-A

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Chapter 6. Schematic Diagram

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Chapter 7. Important Notes
7.1 Packing Requirement for Sending the PCB Assembly by Post
PCB assembly is a kind of sophisticated electronic circuit board. Well
packing will be required when sending them by post.
* Some sophisticated IC components are mounted on the PCB assembly,
hence it is necessary to pack each PCB assembly with a separate static
protecting bag, in order to avoid static electricity.
* Reliable external packing is also very important when sending PCB
assembly by post, in that it would avoid unnecessarily lost or damage.
7.2 Short of Spare Parts while Repairing a Speaker System
If you are short of spare parts when you have some speaker systems waiting
to be repaired, it would be recommended to take the necessary parts form
one speaker system, so that you may have the as many speaker systems.