KYE Systems Corp. SW-Flat 2.1 500 User manual

Service Guide SW-Flat 2.1 500
Version : 1.0 Page 1of 16
SERVICE GUIDE
KYESYSTEMS CORP.
SW-Flat 2.1 500
Version : 1.0
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Service Guide SW-Flat 2.1 500
Version : 1.0 Page 2of 16
Revision History
Version Date Change
1.0 07/27/2004
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Service Guide SW-Flat 2.1 500
Version : 1.0 Page 3of 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 One or more channels no sound ………………….7
1.2.2 Volume , Bass no function .……….……………...8
1.2.3 Power LED (indicator) no light…………………..8
1.2.4 Head-sets no sound ……………………………….9
Chapter 2. Specifications …………………………………………………………10
Chapter 3. Block Diagram ……………………………………………………….11
Chapter 4. Exploded View ……………………………………………………….12
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-Flat 2.1 500
Version : 1.0 Page 4of 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 chemicals ,
From entering the speakers while performing maintenance procedures
on the speakers .
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Service Guide SW-Flat 2.1 500
Version : 1.0 Page 5of 16
Chapter 1. How to Handle Defective Returns
1.1 Overview
Verifying problems &
Proceeding necessary tests
Receiving Defective speakers form
Customers
Analyzing possible malfunction
causes
Deciding & proceeding the
rectification methods
Replace necessary defective parts
Proceeding tests to
Verify if the speaker is
functioning normally
Return the speakers with proper
repackaging to customers
Function NG
Function OK
Function OK
Function NG
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Service Guide SW-Flat 2.1 500
Version : 1.0 Page 6of 16
1.2 Problems
Item Problem Description
1.2.1 One or more channels no sound
1.2.2 Volume , Bass no function
1.2.3 Power LED (indicator) no light
1.2.4 Head-sets no sound
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Service Guide SW-Flat 2.1 500
Version : 1.0 Page 7of 16
Attention
1.2.1 One or more channels no sound
Problem
Solutions
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 .
One or more channels no sound
Broken or short circuit Defective U1-U3
Speaker cable dis-connect or
speaker damaged
Check solder points on
PCB Check and Replace defective
IC
Re-connect speaker cable
or replace defective
speaker(s)
Analyzer and
Identify the Causes
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Service Guide SW-Flat 2.1 500
Version : 1.0 Page 8of 16
1.2.2 Volume , Bass no function
Problem
Solutions
1.2.3 Power LED (indicator) no light
Problem
Solutions
Volume , Bass no function
Broken or short circuit
Defective VR1 , VR2
Check solder points on PCB
Analyzer and
Identify the Causes
Power LED (indicator) no light
Power switch or LED
defective
DefectiveD1-D2,
D5-D6
DC cord of adaptor
disconnected or defective
Resolder or replace
defective component(s)
Analyzer and
Identify the Causes
Check and Replace defective
components
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Service Guide SW-Flat 2.1 500
Version : 1.0 Page 9of 16
1.2.4 Head-sets no sound
Problem
Solutions
Head-sets no sound
Broken or short circuit
Defective T1 , R11 , R12
Check solder points on PCB
Analyzer and
Identify the Causes
Check and Replace defective
components
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Service Guide SW-Flat 2.1 500
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Chapter 2. Specifications
SATELLITE(AT 1KHz)：
NO. Description Unit Specifications
1Out Power at THD 10% W≧2.3
2Sensitivity mV
350 ±50
3Freq. Response (Ref:-3dB) Hz 400Hz ~ 20KHz
4Separation dB ≧-30
5S/N ratio dB ≧-45
6Hum & Noise Vol:max mV 10 ~ 15
7Hum & Noise Vol:min mV 5 ~ 10
HOST(WOOFER)(AT 100Hz)：
NO. Description Unit Specifications
1Out Power at THD 10% W≧8.7
2Sensitivity mV 320 ±50
3Freq. Response (Ref:-3dB) Hz 60Hz ~ 300Hz
4S/N ratio dB ≧-40
5Hum & Noise Vol:max mV 15 ~ 20
6Hum & Noise Vol:min mV 10 ~ 15
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Service Guide SW-Flat 2.1 500
Version : 1.0 Page 11 of 16
Chapter 3. Block Diagram
Volume Control Power
Amplifier
R.CH Speaker
L.CH Speaker
Woof.CH SpeakerWoof. Volume
AC IN Transformer
Power
Amplifier
Audio In
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Chapter 4. Exploded View
Host ( Woofer )
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Satellite
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Service Guide SW-Flat 2.1 500
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Chapter 5. Part List
No. DESCRIPTION Qty Unit Part No.
1SW-Flat2.1 500/BODY/SATELLITE 2PC 1-101-01
2SPEAKER UNIT DBA288 2PC 1-100-01
3RUBBER, SW-FLAT2.1 500/SATELLITE 4PC 1-100-09
4SW-FLAT2.1 500/BODY/HOST 1PC 1-101-02
5SPEAKER UNIT RBA398 1PC 1-100-02
6PCBA, SW-FLAT2.1 500 1PC 1-101-03
7IC, TEA2025B/TEA2025 1PC 1-100-03/04
8IC, YG4558/MC4558, SW-FLAT2.1 500 1PC 1-100-05/06
9IC, TDA2007A 1PC 1-100-07
10 IC, L7810 1PC 1-100-08
11 RUBBER, SW-FLAT2.1 500/HOST 2PC 1-100-10
12 ADAPTOR, 230V:10.5VAC & 1.5A (EU) 1-100-11
13 ADAPTOR, 120V:10.5VAC & 1.5A (US) 1-100-12
14 ADAPTOR, 240V:10.5VAC & 1.5A (UK) 1-100-13
15 ADAPTOR, 240V:10.5VAC & 1.5A (AU) 1-100-14
16 ADAPTOR, 220V:10.5VAC & 1.5A (AR) 1-100-15
17 ADAPTOR, 220V:10.5VAC & 1.5A (KOREA)
1PC
1-100-16
18 CABLE, AUDIO, SW-FLAT2.1 500 1PC 1-100-17
19 GIFT BOX, SW-FLAT2.1 500 1PC 1-102-04
20 PARTITION, SW-FLAT2.1 500 1PC 1-102-02
21 SPONGE , SW-FLAT2.1 500 1PC 1-102-03
22 Round Yellow Type Label 1PC 1-102-05
23 S/N LABEL ( ON GIFT BOX & WOOFER ) 2PC 1-102-01
24 CARTON, SW-FLAT2.1 500 0.1 PC 1-102-06
25 MANUAL, SW-FLAT2.1 500 1PC 1-102-07
26 PE BAG, SW-FLAT2.1 500/HOST 1PC 1-102-08
27 PE BAG, SW-FLAT2.1 500/SATELLITE 2PC 1-102-09
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Service Guide SW-Flat 2.1 500
Version : 1.0 Page 15 of 16
Chapter 6. Schematic Diagram
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Service Guide SW-Flat 2.1 500
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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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