KYE Systems Corp. Genius SP-i202u User manual

Service Guide SP-i202u
Version 1.0 Page 1 of 19
SERVICE GUIDE
KYE SYSTEMS CORP
SP-i202u
Version:1.0

Service Guide SP-i202u
Version 1.0 Page 2 of 19
Revision History
Version Date Change
1.0 10/01/2007

Service Guide SP-i202u
Version 1.0 Page 3 of 19
Table of Contents
RevisionHistory 2
TableofContents 3
GettingStarted 4
Conventions Used in this Guide 4
SafetyPrecautions 4
Chapter 1. How to Handle Defective Returns 5
1.1Overview 5
1.2Problems 6
1.2.1 L/R channels no sound(LED bright) 7
1.2.2 NO power 8
1.2.3 L channels no sound 9
1.2.4 R channels no sound 10
1.2.5 USB input no sound 11
1.2.6 LINE input no sound 12
Chapter 2. Specifications 13
Chapter 3. Block Diagram 14
Chapter 4. Exploded View 15-16
Chapter 5. Part List 17
Chapter 6. Schematic Diagram 18
Chapter 7. Important Notes 19
7.1 Packing Requirement for Sending the PCB Assembly by post 19
7.2 Short of Spare Parts while Repairing a Speaker system 19

Service Guide SP-i202u
Version 1.0 Page 4 of 19
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.
Do not perform any maintenance with wet hand.
Prevent foreign substances, such as water, other liquids or chemical, from
entering the speakers while performing maintenance procedures on the
speakers.

Service Guide SP-i202u
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Chapter 1. How to Handle Defective Returns
1.1 Overview
Receiving Defective speaker form customers
Analyzing possible
malfunction causes
Deciding & proceeding the
rectification methods
Replace necessary
defective
p
arts
Return the speakers with proper
re
p
acka
g
in
g
to customers
Verifying problems
proceeding
necessar
y
tests
Proceeding tests to
verify if the speaker is
functionin
g
normall
y
Function OK
Function NG
Function OKFunction NG

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1.2 Problems
Item Problem Description
1.2.1 L/R channels no sound(LED bright)
1.2.2 NO power
1.2.3 L channels no sound
1.2.4 R channels no sound
1.2.5 USB input no sound
1.2.6 LINE input no sound

Service Guide SP-i202u
Version 1.0 Page 7 of 19
* Attention
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.
1.2.1 L/R channels no sound(LED bright)
Problem
Analyze and
Identify the Causes
Solutions
L/R channels no sound(LED bright)
Broken or short circuit
Check solder points on
PCB
Defective
U1,L11,C52,U10,L16,
U4,R71,R22,
Speaker cable dis-connect or
speaker damaged
Re-connected speaker cable
or replace defective speakers
Check and replace
defective IC or
components

Service Guide SP-i202u
Version 1.0 Page 8 of 19
1.2.2 No power
Problem
Analyze and
Identify the Causes
Solutions
No power
Broken or short circuit
Check solder points on
PCB
Defective
D10,D11,Q1,U5A,C14,
R10,C13,R4,Q3,Q4,
Y1,
Speaker cable dis-connect or
speaker damaged
Re-connected speaker cable
or replace defective speakers
Check and replace
defective IC or
components

Service Guide SP-i202u
Version 1.0 Page 9 of 19
1.2.3 L channels no sound
Problem
Analyze and
Identify the Causes
Solutions
L channels no sound
Broken or short circuit
Check solder points on
PCB
Defective
L Channels Speaker,
L Channels 3.5MM
Jack, Mono cable,
L1,L5,U1,U4,
Speaker cable dis-connect or
speaker damaged
Re-connected speaker cable
or replace defective speakers
Check and replace
defective IC or
components

Service Guide SP-i202u
Version 1.0 Page 10 of 19
1.2.4 R channels no sound
Problem
Analyze and
Identify the Causes
Solutions
R channels no sound
Broken or short circuit
Check solder points on
PCB
Defective
R Channels Speaker,
L7,L9,U1,U4,
Speaker cable dis-connect or
speaker damaged
Re-connected speaker cable
or replace defective speakers
Check and replace
defective IC or
components