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Service Guide SW-HF 5.1 5005
SERVICE GUIDE
KEY SYSTEM CORP
Version 1.0 Page 1 of 30
Service Guide SW-HF 5.1 5005
Revision History
Version Date Change
1.0 26/07/2007
Version 1.0 Page 2 of 30
Service Guide SW-HF 5.1 5005
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）…………………………………….……7
1.2.2 No sound…………………………………………………………….…….8
1.2.3 Front channel no sound (including either FR or FL no sound)….……9
1.2.4 Rear channel no sound (including either RR or RL no sound)...……10
1.2.5 Center no sound…………………………………………………………11
1.2.6 Woofer no sound………………………………………………….…..…12
1.2.7 Input no sound………………………………………………….……..…13
1.2.8 Remote control no use………………………………….………….…...14
1.2.9 Noise………………………….……………………….……………..….15
1.2.10 LED indicators no light……………………………………….………..16
Chapter 2. Specification…………………………………………………..……17
Satellite…………………………………………………………………….…….17
Woofer……………………………………………………………………………18
Chapter 3. Block diagram…………………………………………..………….19
Chapter 4. Exploded view………………………………………………………20
Subwoofer……………………………………………………………….……….20
Satellite (Center)…………………………………………………..…….………21
Satellite (Front)……………………………………………………..…………...22
Satellite (Rear)……………………………………………………..……………22
Chapter 5. Part list…………………………………… …………….…………...23
Woofer………………………………………………………….………………..23
Center…………………………………………………………………………...24
Rear………………………………………………………………….…..……...24
Front………………………………………………………………..……..……..24
Chapter 6 Important notes……………………………………………………….25
Chapter 7 Circuit diagram………………………………………………………..26
SW-HF 5.1 INPUT PCB……………………………………….…….………...26
SW-HF 5.1 CON PCB…………………………………………..……………..27
SW-HF 5.1 AMP PCB & SW-HF 5.1 SATSP PCB………………………….28
SW-HF 5.1 SWAMP PCB……………………………………………………..29
SW-HF 5.1 REM PCB………………………………………….………………30
Version 1.0 Page 3 of 30
Service Guide SW-HF 5.1 5005
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
Place the speakers on a flat, level and stable surface.
Do not place the speakers in environments subject to mist, smoke, vibration,
Do not drop or jolt the speakers.
Do not allow anything to drop into the subwoofer case through its ventilator, as it
Place the unit far enough from other equipments for good heat dissipation.
Do not perform any maintenance with wet hand.
Prevent foreign substance, such as water, other liquids or chemical, from entering
Getting Started
Conventions Used in the Guide
Pay Special Attention: Instructions that are important to remember and may prevent
mistakes.
this guide:
excessive dust, salty or greasy air, or other corrosive gases and fumes.
could result in fatal electric shock or fire.
the speakers while performing maintenance procedures on the speakers.
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Service Guide SW-HF 5.1 5005
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Chapter 1. How to Handle Defective Returns
1.1 Overview
Receiving Defective speaker from customers
Verifying problems
Proceeding
Necessary tests
Function NG Function OK
Function NG
nalyzing possible
Malfunction cause
Function OK
Deciding & proceeding the
Rectification methods
Replace necessary
Defective parts
Verifying problems
Proceeding
Necessary tests
Return the speakers with prope
repacking to customers
Version 1.0 Page 5 of 30
Service Guide SW-HF 5.1 5005
1.2 Problems
Item Problem Description
1.2.1 No power，LED （indicator）
1.2.2 No sound
1.2.3 Front channel no sound (including either FR or FL no sound)
1.2.4 Rear channel no sound (including either RR or RL no sound)
1.2.5 Center no sound
1.2.6 Woofer no sound
1.2.7 input no sound
1.2.8 Remote control no use
1.2.9 Noise
1.2.10 LED indicators no light
Version 1.0 Page 6 of 30
Service Guide SW-HF 5.1 5005
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*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
Fuse
disconnected
or damaged
Repair o
replace
Defective
transformer
Repair o
replace
No power，LED （indicator）
Defective o
damaged
C cable, o
power
Repair o
replace
1. Defective assembled line of SW-HF
5.1 CON PCB
2. Components dry-soldering or
disconnected on SW-HF 5.1 CON PCB
3. Defective or damaged motor VR or
its assembled line
4. Defective or damaged IC2, CR1,
Q1, Q2, Q3, Q4, IC1 on SW
CON PCB
-FH5.1
resolder or replace
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Service Guide SW-HF 5.1 5005
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Problem
Analyze and
identify the
causes
]
Solutions
1.2.2 no sound
PCB damaged,
dry-soldered or
short-circuited
Resolder o
replace
no sound
ssembled line
defectively
connected
Re-connect
or replace
1. Defective IC2 on SW-HF5.1 CON PCB
2. Defective IC1, IC2 SW
3. Defective IC1, IC2, IC3, IC4, IC5, IC6, IC7, IC8,
IC9, R28, R29, R52, EC18, EC19, EC20 on
-HF5.1 INPUT PCB
SW-HF5.1 AMP PCB
4. Defective IC1，
SWAMP PCB
Check and replace defective
IC or components.
IC2，R15，R16 on SW-HF5.1
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Service Guide SW-HF 5.1 5005
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1.2.3 Front channel no sound (including either FR or FL no sound )
Problem
Analyze and
identify the
causes
Solutions
PCB damaged,
dry-soldered o
short-circuited
Resolder o
replace
Front channel no sound (including either FR or FL no sound)
Defective
connection of front
speaker cables
and jacks, o
defective speake
cables, jacks o
front driver units
Re-connect o
replace
Defective
connection o
front audio
cables, or JAC
disconnected
from PCB o
defective
Re-connect o
replace
1.defective IC1, IC2 o
components relating to IC1 and
IC2 on SW-HF5.1 INPUT PCB
2.defective IC4 ， IC1 o
components relating to IC4
and IC1 on SW-HF5.1 AMP
PCB
Check and replace
defective IC o
components
Version 1.0 Page 9 of 30
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