KYE Systems Corp. Genius SP-U115 User manual

Service Manual SP-U115
Service Manual
KEY SYSTEM CORP
Version No.：1.0 Page:1 of 17

2011-8-18
Version No.：1.0 Page:2 of 17
Service Manual SP-U115
Revision
Change History：
Version Date
1.0

Chapter II: Product specifications……………………………………..12
Main/sub-speaker……………………………………………………………12
Chapter III: Flowchart …………………………………………………….13
Chapter IV: Assembly drawing………………………………………….14-15
Main speaker…………………………………………………………………16
Satellite speaker………………………………………………………….14
Main speaker…………………………………………………………………15
Chapter V: Parts list……………………………………………………….16
Satellite speaker………………………………………………………….16
Chapter VI: Schematic circuit diagram………………………………….17
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1.2.4 Hum and current noise…………………………………………….10
1.2.5 Power light is off………………………………………………..11
1.2 Errors…………………………………………………………………….6
1.2.1 No power and indicator is off…………………………………..7
1.2.2 No sound …………………………………………………………..8
1.2.3 Left or right channel error…………………………………….9
Starting to use…………………………………………………………………4
User guide………………………………………………………………………4
Safety instruction……………………………………………………………4
Chapter I: How to dispose the rejected products……………………..5
Service Manual SP-U115
Table of Contents：
File version ……………………………………………………………………2
Contents………………………………………………………………………….3

Put the speaker far away from other electric appliances, so as to realize
heat dissipation better;
Do not use wet hands and prevent foreign objects entering the speaker
during maintenance, such as water or other chemical fluids.
atmosphere (with smoke, vibration, salt or oil), as well as smog;
Never throw or strike the speaker;
Prevent foreign objects going into the subwoofer via the inverted tube;
otherwise, it may cause electric shock or fire;
Please strictly follow the rules below when working with the speaker:
User guide：
Important: This instruction is intended to keep in mind and prevent
errors.
Warning: The information prohibited may damage the product.
Safety instruction：
Service Manual SP-U115
Place the speaker levelly and do not expose to harmful and corrosive
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Starting to use

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Service Manual SP-U115
Test NG Test is OK
Chapter I. How to dispose the rejected products
1.1 Overview
Functional test with error
Receive the rejected speaker
from customer
Replace some parts of the rejected
if necessary
Figure out practicable
maintenance
Analyze potential
causes
Repack the qualified product
and send to the customer
Verify and implement
test if necessary
Test again

1.2.1
1.2.2
1.2.3
1.2.4
1.2.5
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Service Manual SP-U115
Description
1.2 Errors
NO power and indicator is off
NO sound
Left or right channel error
Hum and current noise
LED indicator is off

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*Notice
For maintenance, please take the sequence of single flow chart
below.
Service Manual SP-U115
It is the optimal sequence recommended for solution.
1.2.1 No power and LED indicator is off
1.Welding of power cord is bad;
2.The power plug is out of
contact;
3.CON4 plug becomes loose and
copper foil is broken;
4. The lines of power are bad;
5.Connecting wire of CON4 is
open circuit;
6.LED indicator is bad or
damaged;
No power/LED
indicator is off
The power plug is out
of contact
Inspect/repair Inspect/repair/repl
ace

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Service Manual SP-U115
1.2.2 No sound
无声
1.PCB板短路/断路/无
电引起；
2.连接线损坏或本身不
良，短路/开路
CON1/CON2/CON3
1.J2/J3/D10/Q2本身不
良或损坏；
2.电位器VR1损坏；
3.线路板插头与插座松
脱，接触不良；
4.耳机插座JK1损坏或者
本身不良。
1.PCB板声音通道单元元
件损坏,U1，
JK1,C11,VR1,J2,J3，
Q1,Q2,Q3,D10喇叭引
线，喇叭坏；
No sound
1.It is due to PCB
short circuit /open
circuit/no
electricity;
2.The connecting
wire is inferior or
damaged, short
circuit/open circuit
CON1/CON2/CON3
1.J2/J3/D10/Q2 is bad
or damaged;
2.Potentiometer
VR1 is damaged;
3.PCB plug becomes
loose, or in poor
contact.
Inspect/repair Inspect/repair/replace
1.PCB sound channel
unit elements are
damaged. Speaker and
lead of U1，U2，VR1
are damaged.
Inspect/repair

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1.2.3 Left or right channel error
Service Manual SP-U115
Left/right channel error
1.PCB is short
circuit/open circuit,
or damaged;
2.Signal input line of
left/right channel is
bad or damaged;
3.Signal output line
of left/right channel
is bad or damaged.
1.Speaker of
left/right channel
is bad or damaged;
2.Signal output
line of left/right
channel is not set
properly.
Inspect/repair/repl
ace Inspect/repair
1.PCB sound channel
unit elements are
damaged.Speaker and
lead of U1，
U2,JK1,C11,VR1,J2,J
3,Q1,Q2,Q3 and D10
are damaged.
Replace/repair

1.2.4 Hum and current noise
Version No.：1.0 Page:10 of 17
Service Manual SP-U115
Hum and current
noise
Power supply is
poor; filter
capacitor C22 is
damaged to cause
abnormal
interference of
voltage ripple by
power supply IC; PCB
is affected with
damp, polluted or
broken.
Signal earth line
of CON2 is bad
contact.
Inspect/repair/replace Inspect/repair/replace
Potentiometer is
in use for long
time; spring is
bad contact when
turning knob.
Replace/repair