KYE Systems Corp. Genius SP-U110 User manual

Service Guide SP-U110
SERVICE GUIDE
KEY SYSTEM CORP
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Service Guide SP-U110
Revision History
Version Date Change
1.0 2010-09-06
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Service Guide SP-U110
Table of Contents
Revision History………………………………………………………………….2
Table of contents……………………………………………………………....…3
Getting Start…………………………………………………….………………..4
Conventions Used in this Guide…………………………………………….…...4
Safety Precautions………………………………………………………….……4
Chapter 1. How to Handle Defective Returns………………………………..….5
1.2 Problem………………………………………………………………………6
1.2.1 No power，LED （indicator）unlighted………………………………...7
1.2.2 No sound…………………………………………………………….…….8
1.2.3 Right or left channel no sound….……….……….……….……..….…...…9
1.2.4 Noise………………………………….…………………………....…..…10
Chapter 2. Specification……………………………………………….….……11
Satellite……………………………………………………..…………….……11
Chapter 3. Block diagram…………………………………………..……...…..12
Chapter 4. Part list…………………………………… …………….………….13
Chapter 5 Important notes……………………………………………………...14
Chapter 6. Exploded view………………………………………………...……15
Right Satellite…………………………………………………..…….…...……15
Left Satellite…………………………………………………………………….16
Chapter 7 Schematic diagram……………………………………..…….………17
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Service Guide SP-U110
Getting Started
Conventions Used in the 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 handing 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 substance, such as water, other liquids or chemical, from entering the speakers while
performing maintenance procedures on the speakers.
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Service Guide SP-U110
Chapter 1 How to Handle Defective Returns
1.1 Overview
FUNCTION NG
Receiving Defective speaker from customers
Verifying problems
proceeding necessary
tests
FUNCTION NG FUNCTION OK
Analyzing possible, Main function cause
Deciding & Proceeding the Rectification
methods
Verifying problems
Proceeding Necessary
tests
Replace Necessary defective parts
FUNCTION OK
Return the speakers with proper repacking to
customers
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Service Guide SP-U110
1.2 Problems
Item ItemProblemDescription
1.2.1 No power，LED （indicator）no light
1.2.2 No sound
1.2.3 Right or left channel no sound
1.2.4 Noise
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Service Guide SP-U110
Attention
1.2.1 No power, LED (indicator) unlighted
Problem
Analyze
and
identify
the
causes
Solutions
Defective USB cable
Defective RES R15
Repair or replace Re-solder or replace
No power，LED （indicator）unlighted
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.
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Service Guide SP-U110
1.2.2 No Sound
Problem
Analyze
and identify
thecauses
Solutions
Repair,
re-solder or
Replace
Repair or
Replace
Repair or
Replace
Or caused by the
following defective
components
1. U2 D2822 in AMP
PCBA
VR3 broken or
short-circuited to
GND
PCB
short-circuited,
dry soldered or
broken
No Sound
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Service Guide SP-U110
1.2.3 Right or left channel no sound
Problem
Analyze
and identify
thecauses
Solutions
Repair or
Replace
Repair or
Replace
Repair or
Replace
VR defective in AMP
PCBA
Driver unit or speaker
cable defective or
loosely connected
Audio cable defective
or loosely connected
PCB damaged,
dry-soldered or
short-circuited;
AMP PCBA
are loosely
connected
Right or left channel no sound
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Service Guide SP-U110
1.2.4 Noise
Problem
Analyze
and identify
thecauses
Solutions
Repair or
replace
Check and
replace
Repair
Driver units damaged
Woofer cabinet leaks,
closed not well
Or caused by
vibration from too
long lead wire of
driver units
The power supply
of each IC is
normal or not
Noise
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Service Guide SP-U110
Chapter 2 Specifications
Normal
No Description Unit
R L
Limit
1 RATED OUTPUT POWER @THD 10% W 0.3 0.25 ≧0.25
2 SENSITIVITY (1KHz) @RATED O/P POWER m V 400 400 400±60
3 FREQUENCY RESPONSE
(1KHz -3DB ) LOW Hz 170 170 170±30
4 FREQUENCY RESPONSE
(1KHz -3DB ) HI KHz 20 20 20±5
5 S/N@RATED O/P POWER d B 71 70 ≧65
6
CHANNEL SEPARATION
(ONE CHANNELIN;OTHER
CHANNEL INPUT SHORTING
d B 43 43 ≧40
7 HUM NOISE (VOLUME MAX;INPUT
SHORTING) m V 1.2 1.2 ≦2
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Service Guide SP-U110
Chapter 3 Block diagram
LINE IN
VOLUME
USB
POWER
DC 5V
D2822
POWER
AMPLIFIER
L
SPEAKER
R
SPEAKER
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Service Guide SP-U110
Charter 4 Part List
Right
Description Part No.
3.5mm input cable 11.3.003.0057
USB cable 11.3.008.0023
Potentiometer (VR3) 11.1.030.0041
IC(U2) 11.1.171.0169
LED(LED1) 11.1.124.0056
Left
L to right speaker cable 11.3.002.0031
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Service Guide SP-U110
Chart 5 Important notes
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 the PCB assembly by post, in that it
would avoid unnecessarily lost or damage
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 from one
Speaker system, so that you may have them as many speaker systems
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Service Guide SP-U110
Chapter 6 Exploded view
Right
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Service Guide SP-U110
Chapter 6 Exploded view
Left
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Service Guide SP-U110
Chapter 7 Schematic diagram
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