Genius SW-2.1 850 is a versatile and powerful 2.1 speaker system that delivers rich, immersive audio for your music, movies, and games. With 15 watts of RMS power and a subwoofer, it produces crystal-clear highs and deep, resonant bass that will enhance your listening experience. The system is easy to set up and use, with simple controls for volume and bass adjustment. It also features multiple input options, including a 3.5mm auxiliary input and RCA inputs, so you can connect it to various audio sources such as your computer, smartphone, or MP3 player.
Genius SW-2.1 850 is a versatile and powerful 2.1 speaker system that delivers rich, immersive audio for your music, movies, and games. With 15 watts of RMS power and a subwoofer, it produces crystal-clear highs and deep, resonant bass that will enhance your listening experience. The system is easy to set up and use, with simple controls for volume and bass adjustment. It also features multiple input options, including a 3.5mm auxiliary input and RCA inputs, so you can connect it to various audio sources such as your computer, smartphone, or MP3 player.
Service Guide SW-2.1 850
Version 1.0 Page 1 of 16
SERVICE GUIDE
KYE SYSTEMS CORP
SW-2.1 850
Version:1.0
Service Guide SW-2.1 850
Version 1.0 Page 2 of 16
Revision History
Version Date
Change
1.0 10/07/2005
Service Guide SW-2.1 850
Version 1.0 Page 3 of 16
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 Satellite L/R channels no sound 7
1.2.2 Woofer channel no sound 8
1.2.3 Woofer no power 9
Chapter 2. Specifications 10
Chapter 3. Block Diagram 11
Chapter 4. Exploded View Host(Woofer) 12
Satellite 13
Chapter 5. Part List 14
Chapter 6. Schematic Diagram 15
Chapter 7. Important Notes 16
7.1 Packing Requirement for Sending the PCB Assembly by post 16
7.2 Short of Spare Parts while Repairing a Speaker system 16
Service Guide SW-2.1 850
Version 1.0 Page 4 of 16
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 chemical, from
entering the speakers while performing maintenance procedures on the
speakers.
Service Guide SW-2.1 850
Version 1.0 Page 5 of 16
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
Service Guide SW-2.1 850
Version 1.0 Page 6 of 16
1.2 Problems
Item Problem Description
1.2.1 Satellite L/R channels no sound
1.2.2 Woofer channel no sound
1.2.3 Woofer no power
Service Guide SW-2.1 850
Version 1.0 Page 7 of 16
* 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 Satellite L/R channels no sound
Problem
Analyzer and
Identify the Causes
Solutions
Satellite L/R channels no sound
Broken or short circuit
Check solder points on
PCB
Defective
IC101,C123,C124,
C132,C133,
Speaker cable dis-connect or
speaker damaged
Re-connected speaker cable
or replace defective speakers
Check and replace
defective IC or
components
Service Guide SW-2.1 850
Version 1.0 Page 8 of 16
1.2.3 Woofer channel no sound
Problem
Analyzer and
Identify the Causes
Solutions
Woofer channel no sound
Broken or short circuit
Check solder points on
PCB
Defective
IC102,IC103,C109,
SUBWOOFER VR,
Speaker cable dis-connect or
speaker damaged
Re-connected speaker cable
or replace defective speakers
Check and replace
defective IC or
components
Service Guide SW-2.1 850
Version 1.0 Page 9 of 16
1.2.4 Woofer no power
Problem
Analyzer and
Identify the Causes
Solutions
Woofer no power
Broken or short circuit
Check solder points on
PCB
Defective
D1~D8,
Power SW, Fuse,
Speaker cable dis-connect or
speaker damaged
Re-connected speaker cable
or replace defective speakers
Check and replace
defective IC or
components
Service Guide SW-2.1 850
Version 1.0 Page 10 of 16
Chapter 2. Specifications
Satellite – L/R Channel (AT 1KHZ):
NO Description Unit Specifications
1 Out Power at THD 10% W 3 ± 1
2 Sensitivity mV 350 ± 50
3 Freq Response (Ref:-3dB) Hz 80~20K
4 S/N ratio dB
50
5 Hum & Noise Vol:max mV
3
Host (Woofer) (AT 100Hz):
NO Description Unit Specifications
1 Out Power at THD 10% W 15 ± 3
2 Sensitivity mV 180 ± 50
3 Freq Response (Ref:-3dB) Hz 50~200
4 S/N ration dB
45
5 Hum & Noise Vol: max mV
5
Service Guide SW-2.1 850
Version 1.0 Page 11 of 16
Chapter 3. Block Diagram
2 CH INPUT
INPUT SCH
VO LUME
POWER SCH
FL OUT
SP E AKE R
FR OUT
SP E AKE R
SUBW OOFER OUT
SP E AKE R
TRANS3
POW ER SW
25 0V/ 2A
FUS E
AC IN
BAS S
Service Guide SW-2.1 850
Version 1.0 Page 12 of 16
Chapter 4. Exploded View
Host (Woofer)
Service Guide SW-2.1 850
Version 1.0 Page 13 of 16
Satellite
Service Guide SW-2.1 850
Version 1.0 Page 14 of 16
Chapter 5. Part List
NO DESCRIPTION Qty UNIT Part No
1 SW-2.1 850/BODY/SATELLITE-L 1 PC 850-001
2 SW-2.1 850/BODY/SATELLITE-R 1 PC 850-002
3 SPEAKER UNIT A-301 4 OHM/3” 2 PC 850-003
4 RUBBER, Ø10/SATE 6 PC 850-004
5 SW-2.1 850/BODY/WOOFER/230V-EU 1 PC 850-005
6 SPEAKER UNIT5” 4 OHM 20W 1 PC 850-006
7 PCBA SW-2.1 850 1 PC 850-007
8 IC TDA2030A 1 PC 850-008
9 IC 8227 1 PC 850-009
10 CARTON, SW-2.1 850 1 PC 850-010
11 CUSHION, SW-2.1 850 1 SET 850-011
12 RUBBER, Ø20/HOST 4 PC 850-012
13 TRANSFORMER, 230V:14V AC x2 & 0.7A;
9VAC&0.85A
1 PC 850-013
14 AUDIO CABLE, 1 ST to 1 ST, SW-2.1 850 1 PC 850-014
15 S/N LABEL(NO CARTON&WOOFEWR) 2 PC 850-015
16 MANUAL SW-2.1 850 1 PC 850-016
17 Round Red type Label(NO CARTON) 1 PC 850-017
18 PE BAG, SW-2.1 850/SATE 2 PC 850-018
19 PE BAG, SW-2.1 850/HOST 1 PC 850-019
20 PE BAG, POWER CORD, SW-2.1 850 1 PC 850-020
21 PE BAG, AUDIO CABLE 1 PC 850-021
22 CARDBOARD, English, SW-2.1 850 1 PC 850-022
Service Guide SW-2.1 850
Version 1.0 Page 15 of 16
Chapter 6. Schematic Diagram
Title
Num be r Rev isi onSi z e
B
Dat e :
26-Jun -200 5
Sh e e t o f
R116
100K
R117
100K
MASTERA
50KB
MASTERB
50 KB
L IN
R IN
L OUT
R OUT
Su b wo o fe r
50KB
SUBWOOFER
R118
10 K
R101
22K
R103
22 K
R102
47K
R104
47K
C102
10uF/ 50V
C104
10uF/ 50V
C101
220p F
C103
22 0pF
L IN
R IN
L OUT
R OUT
3
4
2
1
5
J10 1
INPUT PHONE JACK
1
2
3
4
5
J10 2
POW E R
C119
2200 uF/ 16V
C115
2200uF/ 25V
C116
2200uF/ 25V
+1 2 V
-12V
+9 V
D1---D4 1N4004
R114
1K
R115
1K
C117
10 0u F/ 25V
C118
10 0u F/ 25V
+9 . 1 V
-9.1V
10
11
8
7
6
VCC
16
14
OUT2
2
13
12
5
4
OUT1
15
3
9
ST - BY
1
IC101
8227
C126
100u F/ 16V
C121
10 0uF/16V
R120
1K
R119
1K
C120
10 0uF/16V
C125
10 0uF/16V
C127
10 0u F/ 16V
+9 V +9 v
C128
10 0uF/16V
C130
10 0uF/16V
C132
470u F/ 16V
C133
470u F/ 16V
C131
154. M
C129
154. M
C109
4. 7uF/ 50V(NP)
R110
22K
IC103
TDA20 30A
R112
22K
R111
680
C134
100u F/ 25V
-12V
1
2
J105
CON2
C114
224. M
R113
1 OHM
C110
47uF/ 25V
3
2
1
84
IC 102A
4558 JRC
R105
10 0K
R106
3. 9K
R107
22K
C106
103 p
C105
22 0p F
+9 . 1 V
-9.1V
R108
22 K
R109
22 K
C107
104M
C108
183. M
5
6
7
IC10 2B
4558 JRC
C11210 0uF/25V
SUBWOOFER
C122
100P
1
2
3
J10 3
CON3
+1 2 V
C123
68 3M
C124
683M
D5---D8 1N4004
Service Guide SW-2.1 850
Version 1.0 Page 16 of 16
Chapter 7. Important Notes
7.1 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 PCB
assembly by post, in that it would avoid unnecessarily lost or damage.
7.2 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 form
one speaker system, so that you may have the as many speaker systems.
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Genius SW-2.1 850 is a versatile and powerful 2.1 speaker system that delivers rich, immersive audio for your music, movies, and games. With 15 watts of RMS power and a subwoofer, it produces crystal-clear highs and deep, resonant bass that will enhance your listening experience. The system is easy to set up and use, with simple controls for volume and bass adjustment. It also features multiple input options, including a 3.5mm auxiliary input and RCA inputs, so you can connect it to various audio sources such as your computer, smartphone, or MP3 player.
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