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Genius SW-2.1 850 Service Manual

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Type: Service Manual
Category: Speaker System
Pages: 16
Size: 0.09 MB

 

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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 

 


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Service Guide

                                                                                   

SW-2.1 850

 

Version 1.0      Page 2 of 16 

               

Revision History 

 

Version Date 

 

Change 

1.0 10/07/2005   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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Service Guide

                                                                                   

SW-2.1 850

 

Version 1.0      Page 3 of 16 

Table of Contents 

 

Revision History   

 

 

 

 

 

 

 

 

 

 

 

 

 

Table of Contents  

 

 

 

 

 

 

 

 

 

 

 

 

 

Getting Started 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Conventions 

Used 

in 

this 

Guide          4 

Safety Precautions 

 

 

 

 

 

 

 

 

 

 

 

 

 

Chapter 

1. 

How 

to 

Handle 

Defective 

Returns 

        5 

1.1  Overview 

 

 

 

 

 

 

 

 

 

 

 

1.2  Problems 

 

 

 

 

 

 

 

 

 

 

 

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 

 

 

 

 

 

 

 

 

 

 


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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. 

 

 

 

 

 

 

 


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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 parts

Return the speakers with proper 

repackaging to customers

Verifying problems 
proceeding 
necessary tests

Proceeding tests to 
verify if the speaker is 
functioning normally

Function OK

Function NG

Function OK

Function NG 

 


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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 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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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 

 


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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 

 


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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 

 


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Service Guide

                                                                                   

SW-2.1 850

 

Version 1.0      Page 10 of 16 

Chapter 2. Specifications 

 

Satellite – L/R C

hannel

 (AT 1KHZ): 

 

NO Description 

Unit

Specifications 

Out Power at THD 10% 

3 ± 1 

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 

Out Power at THD 10% 

15 ± 3 

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 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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Service Guide

                                                                                   

SW-2.1 850

 

Version 1.0      Page 11 of 16 

 

Chapter 3. Block Diagram 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 CH INPUT

INPUT SCH

VOLUME

POWER SCH

FL OUT
SPEAKER

FR OUT
SPEAKER

SUBWOOFER OUT
SPEAKER

TRANS3

POWER SW 

250V/2A

FUSE

AC IN

BASS

 


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Service Guide

                                                                                   

SW-2.1 850

 

Version 1.0      Page 12 of 16 

 

Chapter 4. Exploded View 

 

 

 

Host (Woofer) 

 

 

 

 

 

 

 

 

 

 

 

 

 


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Service Guide

                                                                                   

SW-2.1 850

 

Version 1.0      Page 13 of 16 

Satellite 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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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 

PC  850-001 

2 SW-2.1 

850/BODY/SATELLITE-R 

PC  850-002 

SPEAKER UNIT A-301 4 OHM/3” 

PC 

850-003 

4 RUBBER, 

Ø10/SATE 

PC  850-004 

5 SW-2.1 

850/BODY/WOOFER/230V-EU 

PC  850-005 

SPEAKER UNIT5” 4 OHM 20W 

PC 

850-006 

PCBA SW-2.1 850 

PC 

850-007 

8 IC 

TDA2030A 

PC  850-008 

9 IC 

8227 

PC  850-009 

10  CARTON, SW-2.1 850 

PC 

850-010 

11  CUSHION, SW-2.1 850 

SET  850-011 

12 RUBBER, 

Ø20/HOST 

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 

PC 

850-014 

15  S/N LABEL(NO CARTON&WOOFEWR) 

PC 

850-015 

16  MANUAL SW-2.1 850 

PC 

850-016 

17  Round Red type Label(NO CARTON) 

PC 

850-017 

18  PE BAG, SW-2.1 850/SATE 

PC 

850-018 

19  PE BAG, SW-2.1 850/HOST 

PC 

850-019 

20  PE BAG, POWER CORD, SW-2.1 850 

PC 

850-020 

21  PE BAG, AUDIO CABLE 

PC 

850-021 

22  CARDBOARD, English, SW-2.1 850 

PC 

850-022 

 

 

 

 

 

 

 

 


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Service Guide

                                                                                   

SW-2.1 850

 

Version 1.0      Page 15 of 16 

Chapter 6. Schematic Diagram 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Title

Num be r

Revision

Siz e

B

Date :

26-Jun-2005

Shee t

of

R116
100K

R117

100K

MASTERA

50KB

MASTERB

50KB

L IN

R IN

L OUT

R OUT

Subwoofer

50KB

SUBWOOFER

C o r t r o l   P C B

R118
10K

R101

22K

R103

22K

R102

47K

R104
47K

C102

10uF/50V

C104

10uF/50V

C101
220pF

C103

220pF

L IN

R IN

L OUT

R OUT

M a i n   P C B

3
4
2
1
5

J101

INPUT PHONE JACK

1
2
3
4
5

J102
POWER

C119

2200uF/16V

C115

2200uF/25V

C116

2200uF/25V

+12V

-12V

+9V

D1---D4

1N4004

R114

1K

R115

1K

C117
100uF/25V

C118
100uF/25V

+9.1V

-9.1V

10

11

8

7

6

VC

C

16

14

OUT2

2

13

12

5

4

OUT1

15

3

9

ST

-B

Y

1

IC101
8227

C126

100uF/16V

C121

100uF/16V

R120

1K

R119

1K

C120

100uF/16V

C125

100uF/16V

C127
100uF/16V

+9V

+9v

C128

100uF/16V

C130

100uF/16V

C132
470uF/16V

C133
470uF/16V

C131
154.M

C129
154.M

C109

4.7uF/50V(NP)

R110

22K

IC103

TDA2030A

R112
22K

R111
680

C134
100uF/25V

-12V

1
2

J105
CON2

C114
224.M

R113
1 OHM

C110

47uF/25V

3

2

1

8

4

IC102A
4558 JRC

R105
100K

R106

3.9K

R107

22K

C106

103 p

C105
220pF

+9.1V

-9.1V

R108

22K

R109

22K

C107

104M

C108

183.M

5

6

7

IC102B

4558 JRC

C112

100uF/25V

SUBWOOFER

C122
100P

1
2
3

J103

CON3

+12V

C123
683M

C124

683M

D5---D8 1N4004

 


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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.