KYE Systems Corp. Genius SP-i355 User manual

ServiceGuide SP-i355
Version : 1.0 Page 1 of 15
SERVICE GUIDE
KYESYSTEMS CORP.
SP-i355

ServiceGuide SP-i355
Version : 1.0 Page 2 of 15
Version : 1.0
RevisionHistory
Version Date Change
1.0 7/5/2009

ServiceGuide SP-i355
Version : 1.0 Page 3 of 15
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 (Line in jack no
function) ………………………………………..…7
1.2.2 Power LED (indicator) no light……...………....…8
1.2.3 Volume , Tone no function……….…….………….8
1.2.4 Earphone no function…………………………….9
Chapter 2. Specifications ………………………………………………………….10
Chapter 3. Block Diagram ……………………………………………………….11
Chapter 4. Exploded View ……………………………………………………….12
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

ServiceGuide SP-i355
Version : 1.0 Page 4 of 15
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 .

ServiceGuide SP-i355
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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
functionin
g
normall
y
Ret
urn the speakers with proper
repackaging to customers
Function NG
Function OK
Function OK
Function NG

ServiceGuide SP-i355
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1.2 Problems
Item Problem Description
1.2.1 One or more channels no sound (Line in jack no function)
1.2.2 PowerLED(indicator)nolight
1.2.3 Volume,Tonenofunction
1.2.4 Earphone no function

ServiceGuide SP-i355
Version : 1.0 Page 7 of 15
Attention
1.2.1 One or more channels no sound (Line in jack no function)
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,
U2 , U3 , VR1
Speaker cable
dis-connect , JACK1 or
JACK2 defective or
speaker damaged
Check solder points on
PCB
Check and Replace
defective IC , VR
Re-connect speaker
cable or replace
defective speaker(s)
Analyzer and
Identify the Causes

ServiceGuide SP-i355
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1.2.2 Power LED (indicator) no light
Problem
Solutions
1.2.3 Volume , Tone no function
Problem
Solutions
Power LED (indicator) no light
Power switch or LED
defective
Defective
D1~D2, D4~D7,
U4
Ac cord of transformer
disconnected or defective
Re-solder or replace
defective component(s)
Analyzer and
Identify the Causes
Volume , Tone no function
Broken or short circuit Defective U1, VR1, SW2, SW3
Check solder points on PCB
Analyzer and
Identify the Causes
Check and Replace defective
components
Check the
ac power

ServiceGuide SP-i355
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1.2.4 Earphone no function
Problem
Solutions
Broken or short circuit Defective JACK2 , R27 , R28
Check solder points on PCB
Analyzer and
Identify the Causes
Check and Replace defective
components
Earphone no function

ServiceGuide SP-i355
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Chapter 2. Specifications
NO. Description Unit Specifications
1 Out Power at THD 10% W ≧5
2 Sensitivity V 550 ±50
3 Freq. Response (1KHz -3dB) Hz 30~20K ± 10%
4 Separation dB ≧40
5 S/N ratio dB ≧70
6 Hum & Noise (Vol.: max) mV ≦ 2