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Service Guide SW-HF 5.1 5005
SERVICE GUIDE
KEY SYSTEM CORP
Version 1.0 Page 1 of 30
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Service Guide SW-HF 5.1 5005
Revision History
Version Date Change
1.0 26/07/2007
Version 1.0 Page 2 of 30
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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
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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
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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
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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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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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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
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1.2.4 Rear channel no sound (including either RR or RL no sound)
Problem
Analyze and
identify the
causes
Solutions
PCB damaged,
dry-soldered o
short-circuited
Repair o
replacing
Rear channel no sound (including either RR or RL no sound
Defective
connection of rea
speaker cables
and jacks, o
defective speake
cables, jacks o
rear driver units
Repair o
replacing
Defective
connection of rea
audio cables, o
JACK disconnecte
from PCB o
defective
Repair o
replacing
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1. Defective IC1, IC2 o
components relating to
IC1 and IC2 on SW-HF5.1
INPUT PCB
2. Defective IC5，IC1 o
components relating to
IC5 and IC1 on SW-HF5.1
MP PCB
Check and replace
defective IC o
components
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1.2.5 Center no sound
Problem
Analyze and
identify the
causes
Solutions
Poor soldering,
broken, or short
circuit
Check
soldering
points on
PCB, and
resolder
Center no sound
Defective
connection o
center speake
cables and
acks, o
defective
speaker cables,
acks or cente
driver units
Reconnect
or replace
Defective
connection o
center audio
cables, or JAC
disconnected
from PCB o
defective
Reconnect
or replace
1. Defective IC1, IC2 o
2. Defective IC6, IC3 o
3. Defective VR2 or components
Version 1.0 Page 11 of 30
components relating to IC1
and IC2 on SW-HF5.1 INPU
PCB
components relating to IC6
and IC3 on SW-HF5.1 AMP
PCB
Check and replace defective
IC or components
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1.2.6 Woofer no sound
Problem
Analyze and
identify the
causes
Solutions
PCB
dry-soldered,
broken, o
short circuited
Repair
Defective
connection o
sub speake
cables and
acks, o
defective
speaker
cables, jacks
or woofe
Reconnect
or replace
Woofer no sound
Defective
connection o
woofer
audio cables,
or JACK
disconnected
from PCB o
defective
Reconnect
or replace
1. Defective IC1, IC2 or components
relating to IC1 and IC2 on SW-HF5.1
INPUT PCB
2. Defective IC6 or components relating to
IC6 on SW-HF5.1 AMP PCB
3. Defective IC1, IC2 on
SWAMP PCB
4. Defective VR4 or components relating
to VR4 on SW-HF5.1 CON PCB
Check and replace defective IC
or components
SW-HF5.1
-
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Service Guide SW-HF 5.1 5005
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1.2.7 input no sound
Problem
Analyze and
identify the
causes
Solutions
Defective input
RCA jack
Check and
replace
input no sound
SW-HF5.1 INPUT
PCB soldering points
broken, dry soldering
or short circuit
Check and
resolder
defective
one(s)
Defective IC1 o
components relating to
inputs on SW-HF5.1
INPUT PCB
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Check and replace
defective IC o
components
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1.2.8 Remote control no use
Problem
Analyze and
identify the
causes
Solutions
Low power o
the battery
Replace
Defective
soldering o
battery spring
Repair and
replace
Remote control no use
SW-HF 5.1
REM PCB
broken, or its
IC or othe
components
Check and
resolder
defective
one(s)
Defective
conductive
rubber o
some keys
Check and
replace
Defective REM1，IC2，
R18，EC3，CC4 on
SW-HF5.1 CON PCB
Check and
replace
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Service Guide SW-HF 5.1 5005
1.2.9. Noise
Problem
Analyze and
identify the
causes
Solutions
Noise
Broken or dry-soldering
PCB
Resolder or replace Check and replace
Defective VR4, VR3, VR2
VR4，VR3，VR2
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Defective or dry-soldering
IC2 or components relating
IC2 on SW-HF5.1 INPUT
PCB
Resolder or replace
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Service Guide SW-HF 5.1 5005
1.2.10. LED indicators no light
Problem
Analyze and
identify the
causes
Solutions
LED indicators no light
Defective , dry-soldering, or broken LED1，LED2，LED3，
LED4，LED5，LED6 or the components relating to them
Check and replace
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Service Guide SW-HF 5.1 5005
Chapter 2. Specifications
Satellite
NO DESCRIPTION UNIT
RATED OUTPUT POWER ＠THD 10%
1
SENSITIVITY（1KHz）＠RATED O/P POEWR
2
SENSITIVITY（1KHz）＠1W O/P POWER
3
MAX INPUT LEVEL＠1% THD ±10%
4
FREQUENCY RESPONSE（1KHz -3DB)
5
S/N＠RATED O/P POWER ≥75
6
CHANNEL UNBALANCE ＠REF O/P POWER ≤0.5
7
CHANNEL SEPARATION(ONE CHANNEL
8
IN;OTHER CHANNEL INPUT SHORTING)
HUM NOISE (VR MAX) (VOLUME MAX;INPUT
9
SHORTING)
1HUM NOISE(VR MIN) (VOLUME MIN.INPUT
10
SHORTING)
LOW Hz 40 70 70 100 100
HI KHz 120 140 140 110 110
CEN FR
W 18 18 18 18 18
m V 380 640 640 380 380
m V 80 140 140 80 80
m V 280 500 500 280 280
d B 85 85 85 85 85
d B 0.3 0.3 0.3 0.3 0.3
d B 60 60 60 60 60
m V 1 1.5 1.5 1 1
m V 0.1 0.1 0.1 0.1 0.1
NOMINAL
FL SR SL
LIMIT
±5%
±10%
±10%
±20
±20
≥55
≤2
≤0.5
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Service Guide SW-HF 5.1 500
Chapter 2 Specifications
Woofer
NO
DESCRIPTION
1
2
3
4
5
6
7
8
9
RATED OUTPUT POWER＠100Hz(10%THD)
SENSITIVITY(100Hz)＠RATED O/P POWER
SENSITIVITY (100Hz)＠1W O/P POWER
MAX INPUT LEVEL＠1% THD
DISTORTION＠100Hz REF.O/P POWER
FREQUENCY RESPONSE（100Hz -3DB)
S/N RATIO＠100Hz RATED O/P POWER
VR MIN NOISE m V 0.1
VR MAX NOISE ＆HUM
LOW Hz 15
HI Hz 140
UNIT NOMINAL LIMIT
W 75
m V 100
m V 10
m V 90
% 0.15
d B 82
m V 3
±5
±10
±5
±9
≤0.5
±10
±20
≥75
≤0.5
≤10
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Service Guide SW-HF 5.1 5005
Chapter 3 Block diagram
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Chapter 4 Exploded view
Subwoofer
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Chapter 4 Exploded view
Satellite (Center)
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Chapter 4 Exploded view
SW-HF 5.1 5005
Satellite (Front)
Satellite (Rear)
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Service Guide SW-HF 5.1 5005
Chapter 5 Part list
Woofer
Ref. NO Description Part NO.
1 wood box (SUB), SW-HF5.1 5005, 12T+9T MDF EP53500501
2 Front panel , SW-HF5.1 5005, black color EP403F0037
Port tube, SW-HF5.1 5005 black color 3 EP41510049
4 smaller knobs, SW-HF5.1 5005, silver, HIPS EP40754136
5 big Knob, SW-HF5.1 5005, silver , HIPS EP40754135
6 LED PCB EP17020003
7 LED cover , transparent, ABS EP41410031
8 keystoke, SW-HF5.1 5005, silver, HIPS EP40754133
9 standby keystroke, SW-HF5.1 5005, silver, HIPS EP40754134
10 VR , M1610GOAH1FX-B10K-L20F EP1B020058
11 SW-HF5.1 CON PCB, 162*169*1.6MM/2 EP15500501
12
13
14 screw, 3.5*16PA EP24100052
15 woofer driver unit, 6.5"8 ohm 75W EP16070032
16 screw, 3.5*18BA EP24010023
17 transformer, 27V*2-2.8A 13.5V*2-1.9A EP13F00286
18 screw, 4*22PWM EP24140016
19 RCA jack, AV6-8.47-7-FBEP EP1A030067
20 red/black terminal EP1A090063
23 power switch EP19030008
25 screw, 3.5*25P EP24100084
27 SW-HF5.1 INPPUT PCB, 94V0 EP15500502
28 SW-HF5.1 SWAMP PCB, 94V0 EP15500504
29 EVA, 86*53*2.5MM EP73010027
30 TDA7294 IC EP1C010175
31 TDA7269A IC EP1C010176
36 BT2328 1C EP1C010116
foot, black, (Φ19*16mm), HIPS
Rubber foot mat, φ11*3MM
AL heat sink, 284*19.5*30MM 22 EP21100067
AC cable, 1.6m 24 EP32F00039
SW-HF5.1 AMP PCB, 94V0 26 EP15500505
L7808 IC 32 EP1C010150
TDA7294 IC 33 EP1C010175
BT4558 IC 34 EP1C020006
T2323 IC 35 EP1C010004
EP41110034
EP73060031
EP53500501 21 back board of woofer box
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Service Guide SW-HF 5.1 5005
Chapter 5 Part list
Center
Part NO. Ref. NO Description
1 Cloth, block EP64000149
2 EP16050041
3 Screw, 3.5*18TA
4 EP16020043
5 Screw, 3.5*14PA
6 Center wood box, K86 EP53K86001
7
8 Red/black terminal, H-WP2-8
9 rubber foot mat, 14mm*2mm
center driver unit A-115-3, 4"4 Ω15W
tweeter A-52-2A , 2"8Ω 10W
paper tube, φ22*φ25*30mm
EP24150024
EP24100082
EP41590040
EP1A090065
EP73060003
Rear
Part NO. Ref. NO Description
1 Cloth, black EP64000148
2
3
4
5
6
7
8
9
tweeter, A-52-2, 2"8Ω 10W
Screw, 3.5*14PA, EP24100082
rear driver unit, A-78-11, 3"8Ω15W
Screw, 3.5*18TA
Rear wood box, K85-1, W120*H210*D130MM
paper tube, K85-1, φ22*φ25*60mm
rubber foot mat, 14mm*2mm
Red/black terminal, H-WP2-8
EP16020041
EP16030045
EP24150024
EP53K85002
EP41590039
EP73060003
EP1A090065
Front
Part NO. Ref. NO Description
1 Cloth, K85, black EP16020041
2
3
4
5
6
7
8
9
tweeter, A-52-2, 2"8Ω 10W
Screw, 3.5*14PA, EP24100082
front driver unit, A-115-2, 4"8Ω15W
Screw, 3.5*18TA
Front wood box, K85, W140*H230*D155MM
Paper tube, K85, W140*H230*D155MM
rubber foot mat, 14mm*2mm
Red/black terminal, H-WP2-8
EP16020041
EP16050040
EP24150024
EP53K85001
EP41590038
EP73060003
EP1A090065
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Service Guide SW-HF 5.1 5005
Chapter 6. Important Notes
6.1 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
the PCB assembly by post, in that it would avoid unnecessarily
lost or damage.
6.2 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 from one
Speaker system, so that you may have the as many speaker
systems
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Service Guide SW-HF 5.1 5005
Chapter 7. Schematic diagram
SW-HF 5.1 INPUT PCB
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Service Guide SW-HF 5.1 5005
Chapter 7. Schematic diagram
SW-HF 5.1 CON PCB
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Service Guide SW-HF 5.1 5005
Chapter 7. Schematic diagram
SW-HF 5.1 AMP PCB
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Service Guide SW-HF 5.1 5005
Chapter 7. Schematic diagram
SW-HF 5.1 SWAMP PCB & SW-HF 5.1 SATSP PCB
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Service Guide SW-HF 5.1 5005
Chapter 7. Schematic diagram
SW-HF 5.1 REM PCB (remote control)
Version 1.0 Page 30 of 30
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