Genius SW-J2.1 1200 User manual

Service Guide SW-J2.1 1200
SERVICE GUIDE
KEY SYSTEM CORP
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Service Guide SW-J2.1 1200
Revision History
Version Date Change
1.0 05/04/2009
Version 1.0 Page 2 of 23
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Service Guide SW-J2.1 1200
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
Satellite…………………………………………………..…….…………………18
Wired-control…………………………………………………………………….19
Chapter 5. Part list…………………………………… …………….…………...20
Woofer………………………………………………………….……………….. 20
Satellite…………………………………………………………………………...21
Wired control……………………………………………………………….…..21
Chapter 6 Important notes……………………………………………………….22
Chapter 7 Schematic diagram……………………………………..……………23
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Table of Contents
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Service Guide SW-J2.1 1200
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 1200
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
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Service Guide SW-J2.1 1200
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 1200
*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
YM9660 2.1LAMP.
2. Dry soldering of PT1 in YM9660 2.1L AMP
3. Copper foil of YM9660 2.1LAMP PCB broken
4. G6 plug of the wired-control defectively connected or damaged
5. VR2 on the ym9660-2.1L CON PCB damaged or dry-soldered
6. JK2 on YM9660 2.1L PCB defective
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Service Guide SW-J2.1 1200
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;
Or G6 plug of the
wired-control
defectively connected
or damaged
JK2 in YM9660 2.1L AMP
PCB defective
VR2 in YM9660 2.1L CON
PCB damaged or PCB
copper foil broken
Repair or replace
Repair or replace
Or caused by the following defective
components in YM9660 2.1L AMP
PCB: IC1，IC4，IC3，IC2，Q1，
ZD1, ZD1，JK1，EC6, R21，EC6，
JK1，SP1
Repair, resolder or
replace
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Service Guide SW-J2.1 1200
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
JK6，JK7 or VR2 in YM9660
2.1L CON PCB defective;
IC1 or IC3 or related
components damaged in
YM9660 2.1LAMP PCB
Driver unit or speaker
cable defective or
loosely connected
Audio cable defective
or loosely connected
PCB damaged, dry-soldered or
short-circuited;
JK1, JK2 and JK3 in YM9660
2.1L AMP defective or
damaged;
G6 plug of the wired-control
Right or left channel no sound
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Service Guide SW-J2.1 1200
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
2. IC2, IC3 or VR1 or related
components damaged in
YM9660 2.1LAMP PCB.
Repair or replace Repair or replace
Woofer driver unit
/Speaker cable of
YM9660 2.1L AMP
SP1 dry-soldered or
defective;
Repair or replace
Woofer no sound
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