KYE Systems Corp. Genius SP-i175 User manual

ServiceGuide SP-i175
Version : 1.0 Page 1 of 14
SERVICE GUIDE
KYESYSTEMS CORP.
SP-i175
Version : 1.0

ServiceGuide SP-i175
Version : 1.0 Page 2 of 14
RevisionHistory
Version Date Change
1.0 16/11/2011

ServiceGuide SP-i175
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 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-i175
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-i175
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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 No sound
1.2.2 PowerLED(indicator)nolight
1.2.3 Volume no function

ServiceGuide SP-i175
Version : 1.0 Page 7 of 14
Attention
1.2.1 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.
No sound
Broken or short circuit Defective IC2 ,
VR1
Speaker damaged
Check solder points on
PCB
Check and Replace
defective IC , VR
Replace defective
speaker
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
USB Jack , Battery
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 VR1
Check solder points on PCB
Analyzer and
Identify the Causes
Check and Replace defective
components
Check the
USB cable

ServiceGuide SP-i175
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Chapter 2. Specifications
NO. Description Unit Specifications
1 Out Power at THD 10% W 2
2 Freq. Response (1KHz -3dB) Hz 170~20K ± 10%
3 Separation dB ≧40
4 S/N ratio dB ≧70
5 Hum & Noise (Vol.: max) mV ≦ 2

ServiceGuide SP-i175
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Chapter 3. Block Diagram
AUDIO IN
Volume
Increase
/
Decrease
Power
Amplifier
Speaker
USB POWER IN Battery
AUDIO OUT