KYE Systems Corp. Genius SW-J2.1 500 User manual
Service Guide SW-J2.1 500
SERVICE GUIDE
KEY SYSTEM CORP
Version 1.0 Page 1 of 23
Service Guide SW-J2.1 500
Revision History
Version Date Change
1.0 06/08/2009
Version 1.0 Page 2 of 23
Service Guide SW-J2.1 500
Revision History………………………………………………………………….2
Table of contents……………………………………………………………...…3
Getting Start…………………………………………………….………………...4
Conventions Used in this Guide…………………………………………….…4
Safety Precautions………………………………………………………………4
Chapter 1. How to Handle Defective Returns……………………………….5
1.2 Problem………………………………………………………………………6
1.2.1 No power，LED （indicator）unlighted……………………………….7
1.2.2 No sound…………………………………………………………….…….8
1.2.3 Right or left channel no sound….……….……….……….……..….……9
1.2.4 Woofer no sound….……….……….……….………….….……….……10
1.2.5 Noise………………………………….…………………………….…..…11
1.2.6 LED indicators no light…………………………….….……………..….12
1.2.7 Headphone jack output no sound……………………………..………..13
1.2.8 VR, headphone jack or line-in jack abnormal……..………….………..14
Chapter 2. Specification…………………………………………………….……15
Satellite…………………………………………………………………….……15
Woofer……………………………………………………………………………15
Chapter 3. Block diagram…………………………………………..…………..16
Chapter 4. Exploded view………………………………………………………17
Subwoofer……………………………………………………………….……….17
Right Satellite…………………………………………………..…….…………………18
Left Satellite…………………………………………………………………….19
Chapter 5. Part list…………………………………… …………….…………...20
Woofer………………………………………………………….……………….. 20
Right Satellite…………………………………………………………………...21
Left Satellite………..………………………………………………………….…..21
Chapter 6 Important notes……………………………………………………….22
Chapter 7 Schematic diagram……………………………………..……………23
Version 1.0 Page 3 of 23
Table of Contents
Service Guide SW-J2.1 500
Getting Started
Conventions Used in the 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 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.
Donotallowanythingtodrop 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.
Preventforeignsubstance,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-J2.1 500
Chapter 1. How to Handle Defective Returns
1.1 Overview
Function NG Function OK
FunctionNG
FunctionOK
Version 1.0 Page 5 of 23
Receiving Defective speaker from customers
Return the speakers with proper
repacking to customers
Verifying problems
Proceeding
Necessary tests
Analyzing possible
Malfunction cause
Deciding & proceeding the
Rectification methods
Replace necessary
Defective parts
Verifying problems
Proceeding
Necessary tests
Service Guide SW-J2.1 500
1.2 Problems
Item Problem Description
1.2.1 No power，LED （indicator）no light
1.2.2 No sound
1.2.3 Right or left channel no sound
1.2.4 Woofer no sound
1.2.5 Noise
1.2.6 LEDindicatornolight
1.2.7 Headphone jack output no sound
1.2.8 VR, headphone jack or line-in jack abnormal
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Service Guide SW-J2.1 500
*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 No power，LED （indicator）unlighted
Problem
Analyze
and
identify
the
causes
Solutions
Version 1.0 Page 7 of 23
No power，LED （indicator）unlighted
Repair or replace
Defective transformer
Defective or damaged
AC cable or power
switch
resolder or replace
Or caused by the following:
1. Transformer secondary wire loosely connected with PT1
jack in J2.1 500 AMP.
2. Copper foil of J2.1 500 AMP PCB broken
Service Guide SW-J2.1 500
1.2.2 No sound
Problem
Analyze and
identify the
causes
]
Solutions
Version 1.0 Page 8 of 23
No sound
PCB
short-circuited, dry
soldered or
broken;
JK1 in J2.1 500 AMP and JK3
in J2.1 500 CON is not
properly connected
Repair or replace
Repair or replace
Or caused by the following defective
components
1. IC1, IC2 in J2.1 500 AMP PCB
2. VR1，JK2，JK4 in J2.1 500 CON
PCB
Repair, resolder or
replace
Service Guide SW-J2.1 500
1.2.3 Right or left channel no sound
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 9 of 23
Replace or
replace
Re-connect ,
replace or repair
Repair or
replace
1. VR，JK2 or JK4 defective in J2.1 500
CON PCB
2. Or caused by the following defective
components :
R4,R11,MC2,MC5,R8,R10,CC2,CC1,R5R8,M
C3,MC4,EC7, EC6,EC20,EC19,IC1,IC2,SP2.
Driver unit or speaker
cable defective or
loosely connected
Audio cable defective
or loosely connected
PCB damaged, dry-soldered
or short-circuited;
JK1 in J2.1 500 AMP and JK3
in J2.1 500 CON is loosely
connected
Right or left channel no sound
Service Guide SW-J2.1 500
1.2.4 Woofer no sound
Problem
Analyze and
identify the
causes
Solution
-
Version 1.0 Page 10 of 23
PCB damaged,
dry-soldered or
short-circuited
VR2 in J2.1 500 AMP PCB
defective
Repair or replace Repair or replace
Woofer driver unit
/Speaker cable of J2.1
500AMP PCB SP3
dry-soldered or defective
Repair or replace
Woofer no sound
Service Guide SW-J2.1 500
1.2.5 Noise
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 11 of 23
Filter capacitor/ diode dry-soldered
or damaged, pls check EC16, EC2,
EC10，EC13，EC5,EC15, D1，D2，
D3，D4 in J2.1 500 AMP defective
or not
The power supply of each IC is
normal or not;
Or caused by vibration from
too long lead wire of driver
units
Driver units damaged
Woofer cabinet leaks,
closed not well.
Repair Check and replace Repair or replace
Noise
Service Guide SW-J2.1 500
1.2.6 LED indicator no light
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 12 of 23
Check and replace
1. PCB damaged, dry-soldered or short-circuited
2. R1 in J2.1 500AMP PCB R1defective
3. Poor connection of JK1 in J2.1 500AMP PCB and JK3 in
J2.1 500CON PCB
4. Defective LED1 inJ2.1 500 CON PCB
LED indicato
r
no li
g
ht
Service Guide SW-J2.1 500
1.2.7 Headphone jack output no sound
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 13 of 23
Check and replace
JK2 in J2.1 500 CON PCB defective or its
related copper foil broken
Head
p
hone
j
ack no sound
Service Guide SW-J2.1 500
1.2.8 VR, headphone jack or line-in jack abnormal
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 164of 23
VR:
Defective VR may cause VR1 in
J2.1 500CON PCB or VR2 in J2.1
500AMP PCB having scratching
sound when rotatin
g
Check and replace Check and replace
Jack:
JK2 or JK4 in J2.1 500CON PCB
defective
SP3 in J2.1 500AMP PCB defective
VR, head
p
hone
j
ack or line-in
j
ack abnormal
Service Guide SW-J2.1 500
Satellite
Normal
NO DESCRIPTION UNIT
R L
LIMIT
1 RATED OUTPUT POWER @THD 10% W 3.7 4 ≧3
2 SENSITIVITY (1KHz) @RATED O/P POWER m V 590 600 600±60
3 SENSITIVITY (1KHz) @1W O/P POWER m V 260 260 260±60
4 MAX INPUT LEVEL@1% THD m V 360 350 350±35
5 DISTOPTION@1kHz 1W OUT % 0.8 0.8 ≦1
6 FREQUENCY RESPONSE(1KHz -3DB ) LOW Hz 190 190 190±20
7 FREQUENCY RESPONSE(1KHz -3DB ) HI KHz 110 110 110±20
8 S/N@RATED O/P POWER d B 80 79 ≧70
9 CHANNEL UNBALANCE @REF O/P POWER d B 0.3 0.5 ≦1
CHANNEL SEPARATION(ONE
CHANNELIN;OTHER CHANNEL INPUT
SHORTING d B 51 50 ≧40
10
HUM NOISE (VOLUME MAX;INPUT
SHORTING)
11 m V 0.6 0.7 ≦2
12 HUM NOISE (VOLUME MIN INPUT SHORTING) m V 0.3 0.4 ≦1
Woofer
NO DESCRIPTION UNIT Normal LIMIT
6.8
1 RATED OUTPUT POWER@100HZ (10%THD) W ≧6
140
2 SENSITIVITY (100Hz) @RATED O/P POWER m V 130±30
58
3 SENSITIVITY (100Hz) @1W O/P POWER m V 55±6
110
4 MAX INPUT LEVEL@1% THD m V 110±15
0.5
5 % ≦1
DISTOPTION@100Hz 1W OUT 27
6 FREQUENCY RESPONSE(100Hz -3DB ) LOW Hz 25±5
190
7 FREQUENCY RESPONSE(100Hz -3DB ) HI Hz 190±20
73
8 S/N RATIO@100HZ RATED O/P POWER d B ≧70
HUM NOISE (VOLUME MAX;INPUT
SHORTING) m V 1.4
9 ≦2
0.6
10 HUM NOISE (VOLUME MIN INPUT SHORTING) m V ≦1
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Chapter 2. Specifications
Service Guide SW-J2.1 500
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Chapter 3 Block diagram
Service Guide SW-J2.1 500
Subwoofer
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Chapter 4 Exploded view
Service Guide SW-J2.1 500
Right Satellite
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Chapter 4 Exploded view
Service Guide SW-J2.1 500
Left Satellite
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Chapter 4 Exploded view
Service Guide SW-J2.1 500
Woofer
Description Part NO
port tube, SW2.1 500 EP41510068
port tube, YM777 EP41510065
wooden cabinet, J2.1 500 EP53500J03A
driver unit, A-862-3 EP16030073
PCBA, J2.1 500 EPH1P500001
knob, YM230 EP40711187
power switch EP19030008
transformer, 230V 50HZ/10V-1.5A EP13500056
woofer driver unit cloth cover, J2.1 500 EP41010173
EP1C010200
IC1，TEA2025B EP1C010200
IC2, TEA2025B
AC cable EP32020044
EP1B010070
VR2, 16KG-B50K-L15
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Cha
p
ter 5 Part list
Table of contents
