Genius SW-2.1 355 User manual

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SW-2.1 355SW-2.1 355
SERSER
VICE VICE
GUIDEGUIDE
KK
EY SYSTEM COEY SYSTEM CO
RPRP
Version Version
1.0 1.0
Page Page
1 1
of of
2020

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SW-2.1 355SW-2.1 355
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HH
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Version Date ChangeVersion Date Change
1.0 15/11/20071.0 15/11/2007
Version Version
1.0 1.0
Page Page
2 2
of of
2020

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Revis
io
n
His
to
ry
………
………
………
………
………
………
………
………
….2
Ta
bl
e
of
co
nt
ent
s……………
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………
………
………
………
...…3
Ge
tti
ng
Sta
rt
…………………………………………………….………………...4
Conventions Used in this Guide…………………………………………….…4
Safety Precautions………………………………………………………………
4
Cha
pter 1. How t
o Handle Defe
cti
ve Re
tur
ns
……………………………….5
1.2 Problem
………………………………………………………………………6
1.2.1 No power
，
LED
（
indicator
）
unlighted……………………………….
7
1.2.2 No sound
…………………………………………………………….…….8
1.2.3 Right channel no sound
….……….……….……….……….……….……9
1.2.4 Left channel no sound
….……….……….……….……….……….……10
1.2.6 Woofer no sound
………………………………………………….…..…11
1.2.9 Noise………………………….……………………….……………..….
12
1.2.10 LED indicators no light……………………………………….………..
13
Chapt
er
2. Speci
fi
cat
io
n……………
………
………
………
………
……..
……14
Satellite…………………………………………………………………….…….14
Woofer……………………………………………………………………………14
Chapt
er 3. Bl
oc
k d
iag
ram
………
………
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…..……
…….1
5
Chapt
er
4. Exp
lo
ded
vi
ew…………
………
………
………
………
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……16
Subwoofer……………………………………………………………….……….16
Satellite…………………………………………………..…….…………………17
Chapt
er
5. Part
li
st
………
………
………
………
…… …………
….……
……..
.18
Woofer………………………………………………………….……………….. 18
Satellite…………………………………………………………………………...18
Chapter 6 Important notes……………………………………………………….19
Chapter 7 Schematic diagram……………………………………………………20
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T
a
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Ge
tt
in
g S
tarted
Conventions
Use
d in
the Guide
Pay Spec
ial 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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Cha
pt
er 1
. H
ow
to
Ha
nd
le De
fect
iv
e R
eturn
s
1.
1 Overvi
ew
Function NG
Function OK
Function NG
Function OK
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Receiving Defective speaker from customers
Verifying problems
Proceeding
Necessary tests
Return the speakers with proper
repacking to customers
Analyzing possible
Malfunction cause
Deciding & proceeding the
Rectification methods
Replace necessary
Defective parts
Verifying problems
Proceeding
Necessary tests

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1.2 Problems
Ite
m
P
robl
em
De
scrip
tion
1.2.1
No
power
，
LED
（
indicator
）
no light
1.2.2
No
sound
1.2.3
Right
channel
no
sound
1.2.4
Left
channel
no
sound
1.2.5
Woofer
no
sound
1.2.6 Noise
1.2.7
LED
indicators
no
light
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*Attention
Please follow the numbered sequence marked within parenthesis given in
individual
Flow chat in that this is the
best-recommende
d sequence to rectify the problems.
1.2.1 No power
Problem
Analyze
and
identify
the
causes
Solutions
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Defective soldering of transformer
secondary
wire
and
CON4
on
PCB
board
No power
，
LED
（
indicator
）
unlighted
Repair or replace
resolder or replace
Repair or replace
Defective or
damaged AC cable,
or power switch
Defective
transformer
LED indicator
unlighted

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1.
2.
2 no s
ou
nd
Problem
Analyze and
identify the
causes
]
Solutions
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8
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No
so
un
d
Input cable
damaged or
defective
8P assembled line
defectively
connected between
CON1 and CON2
PCB
short-circuited, dry
soldered or
damaged
Repair
,
resolder
or
replace
Repair or replace
Repair or replace
Repair or replace
Defective
components
of VR1, JK1,
U1, U2,

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1.
2.
3
Right
channel
no
sou
nd
Problem
Analyze and
identify the
causes
Solutions
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Input cable
damaged or
defective
Right Speaker
cable damaged or
defective
Right driver unit
dry-soldered o
r
defective
1. Defective JK1, JK2
2. Defective assembled line
between CON1 and CON2
3. Defective or dry-soldered
R8
，
R1
，
C1
，
R19
，
C3
，
C10
，
U1
，
or VR1
Replace or
replace
Replace or
replace
Re-connect ,
replace or repair
PCB damaged,
dry-soldered or
short-circuited
short-circuited
Repair or
replace
Right channel no sound

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1.
2.
4 Left chann
el
no so
un
d
Problem
Analyze and
identify the
causes
Solutions
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Input cable
damaged or
defective
Left Speaker cable
damaged or
defective
Left driver unit
dry-soldered or
defective
1. Defective JK1, JK2
2. Defective assembled line
between CON1 and CON2
3. Defective or dry-soldered
R7
，
R2
，
C2
，
R20
，
C4
，
C11
，
U1
，
VR1
Repair or
replace
Repair or
replace
Re-connect,
replace or repair
PCB damaged,
dry-soldered or
short-circuited
short-circuited
Repair or
replace
Left channel no sound

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1.
2.
5 W
oo
fer no
sou
nd
Problem
Analyze and
identify the
causes
Solutions
-
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1
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Woofer driver unit
dry-soldered or
defective
Repair or replace
Repair or replace
1.
Defective
assembled
line
between
CON1 and CON2
2. R9
，
R10
，
C15
，
C18
，
R14VR2
，
R15,
C20
，
C21
，
CON4 dry-soldered tor
defective
3.
U2
/U3
or
the
components
around
defective or dry-soldered
Woofer no sound

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1.2.6. Noise
Problem
Analyze and
identify the
causes
Solutions
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Check and replace
Repair or replace
Driver units
damaged
Vibration from too
long lead wire of
driver units
Repair
1. D1-D4
，
C29 dry-soldered
or defective
2. U1, U2, U3 or the
components around
dry-soldered or defective
3. PCB broken or dry-soldered
Noise

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1.
2.
7.
LED
in
di
cator
s no l
igh
t
Problem
Analyze and
identify the
causes
Solutions
Version
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Check and replace
1. Defective, dry-soldered, or broken PCB
2. R18 , LED defective or dry-soldered
LED indicators no light

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Satellite
DESCRIPTION
NO
UNIT
NOMINAL
LIMIT
1
W 2.8
RATED OUTPUT POWER
＠
THD 10%
≥
2.3
2
m
V
430
440±44
SENSITIVITY
（
1KHz
）＠
RATED O/P POEWR
3
m
V
195
200±20
SENSITIVITY
（
1KHz
）＠
1W O/P POWER
4
m
V
220
230±23
L
O
W
H
z
MAX INPUT LEVEL
＠
1% THD
160
170
FREQUENCY RESPONSE
（
1KHz -3DB)
H
I
K
H
z
1
3
0
5
100
6
S/N
＠
RATED O/P POWER
d
B
55
≥
50
7
CHANNEL UNBALANCE
＠
REF O/P POWER
d B
8
CHANNEL SEPARATION(ONE CHANNEL
IN;OTHER
CHANNEL
INPUT
SHORTING)
d
B
0.5
≤
1
HUM NOISE (VR MAX) (VOLUME MAX;INPUT
SHORTING)
m
V
0.6
≤
1
9
10
1HUM
NOISE(VR
MIN)
(VOLUME
MIN.INPUT
SHORTING)
m
V
0.8
≤
2
Woofer
NO
DESCRIPTION
UNIT
NOMINAL
LIMIT
1
RA
TED OUTP
UT POWER
＠
100Hz(10%THD)
W 4.4
≥
3.8
2
SENSITIVITY(100Hz)
＠
RATED O/P POWER
m V
110
110
±
11
3
SENSITIVITY (100Hz)
＠
1W O/P POWER
m
V
48
48±4.8
4
MAX INPUT LEVEL
＠
1% THD
m
V
75
75±7.5
5
% 0.4
≤
0.8
LOW
DISTORTION
＠
100Hz REF.O/P POWER
Hz 10
10
6
FREQUENCY RESPONSE
（
100Hz -3DB)
HI
Hz
140
140
7
d
B
65
S/N RATIO
＠
100Hz RATED O/P POWER
≥
50
8
VR
MIN
NOISE
m
V
0.8
≤
1.5
9
m
V
1.7
VR MAX NOISE
＆
HUM
≤
5
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Chapter 2. Specifications

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Cha
pter 3 Bloc
k d
iagram

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Subwoofer
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Chapter 4 Exploded view

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Satellite
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C
hapter 4 Explod
ed view

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Woofer
Ref.
NO
Description
Part
NO.
1
Knob
EP40711
156
2
Woofer
front
panel
EP40910362
3
Woofer
foot
mat,
8*3MM
EP73050003
4
wood
cabinet
EP53355J01
5
volume
switch,
16KG-B50K-
L15
EP1B010070
6
Paper
tube
EP41590051
7
woofer
unit
,
4”
4ohms
10W
EP16050049
8
Transformer;
9V-1A
EP13F00319
9
woofer
back
board
EP53355J01
10
power
switch
EP19030008
1
1
AC
cable,
1.5m
EP32020044
12
Bush
EP41610059
13
AL
heat
sink
;
36*20*15MM
EP23011042
14
IC
,
BT2025CP
（
U1
）
/
TEA2025B
(U2)
EPIC020001
/EPIC010071
15
PCB;
137*102.5*1.6
MM/2
EP15355003
Satellite
Ref.
NO
Description
Part
NO.
1
logo
plate;
M78
EP41240064
2
met
al
mesh
;
104.
3*76
.1*20
.9MM
EP61
0200
01
3
Satellite
front
EP40410134
4
satellite
driver
unit,
3"
4OHM
3W
EP1601007
8
5
foot
mat,
10*2MM
EP73050001
6
back
cabinet
EP40610367
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C
ha
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P
a
rt l
ist

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6.1 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.
6.2 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 the as many speaker
systems
Version
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C
h
a
t
e
r
6
.
I
m
o
r
t
a
n
t
N
o
t
e
s

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C
ha
te
r
7
.
S
ch
e
ma
ti
c
di
a
ra
m