KYE Systems Corp. Genius SP-HF360A User manual

Service Guide SP-HF360A
SERVICE GUIDE
KEY SYSTEM CORP
Version 1.0 Page 1 of 21

Service Guide SP-HF360A
Revision History
Version Date Change
1.0 06/08/2009
Version 1.0 Page 2 of 21

Service Guide SP-HF360A
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 channel no sound........….……….……….……….……..….……9
1.2.4 Left channel no sound….………..……….……………….……….……10
1.2.5 Noise………………………………….…………………………….…..…11
1.2.6 LED indicators no light…………………………….….……………..….12
1.2.7 No volume change when rotating VR…………………………….…..13
1.2.8 No sound when input jack is used……..…………….…………..…..14
Chapter 2. Specification………………………………….……………….……15
Chapter 3. Block diagram…………………………………………..…………..16
Chapter 4. Exploded view………………………………………………………17
Active speaker…………..…….……………………………………….……….17
Passive speaker………………………………………..…….…………………18
Chapter 5. Part list…………………………………… …………….…………...19
Active speaker…………………………………………………………………...19
Passive speaker………..…………………………………………………….…19
Chapter 6 Important notes………………………………………………..…….20
Chapter 7 Schematic diagram……………………………………..……………21
Version 1.0 Page 3 of 21
Tabl
e of Contents

Service Guide SP-HF360A
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.
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.
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.
Version 1.0 Page 4 of 21

Service Guide SP-HF360A
Chapter 1. How to Handle Defective Returns
1.1 Overview
Function NG Function OK
FunctionNG
FunctionOK
Version 1.0 Page 5 of 21
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 SP-HF360A
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 No volume change when rotating VR
1.2.8 No sound when input jack is used
Version1.0 Page6of21

Service Guide SP-HF360A
*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 21
No power，LED （indicator）unlighted
Repair or replace
1. Defective transformer
2. 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 SP-HF360A PC
2. Copper foil of PCB broken

Service Guide SP-HF360A
1.2.2 No sound
Problem
Analyze and
identify the
causes
]
Solutions
Version 1.0 Page 8 of 21
No sound
PCB
short-circuited, dry
soldered or
broken;
Audio cable loosely
connected or broken
Repair or replace
Repair or replace
Or caused by the following
components:
IC1, IC2 or EC6 in PCB defective
Q1 damaged
Repair, resolder or
replace

Service Guide SP-HF360A
1.2.3 Right channel no sound
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 9 of 21
PCB damaged, dry-soldered
or short-circuited;
VR1, VR2 damaged or
loose-connected
IC1, IC2 damaged
1. Driver unit or speaker
cable defective or loosely
connected
2. The 3.5 mm plug of
Audio cable defective or
loosely connected
Replace or
replace
Repair or
replace
Right channel no sound

Service Guide SP-HF360A
1.2.4 Left channel no sound
Problem
Analyze and
identify the
causes
Solution
-
Version 1.0 Page 10 of 21
Repair or replace Replace
1. Driver unit or speaker
cable defective or loosely
connected
2. The 3.5 mm plug of
Audio cable defective or
loosely connected
1. PCB damaged, dry-soldered
or short-circuited;
2. VR1, VR2 damaged or
loose-connected
IC1, IC2 damaged
Left channel no sound

Service Guide SP-HF360A
1.2.5 Noise
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 11 of 21
1. Check D1，D2，D3，D4，EC6
dry-soldered or not
2. The power supply of each IC is
normal or not;
3. PCB dry-solder or broken
1. Driver units damaged
2. Or caused by vibration
from too long lead wire of
driver units
EC3，R25，ZD2，R29 in
PCB defective
Repair or replace Check and replace Replace
Noise

Service Guide SP-HF360A
1.2.6 LED indicator no light
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 12 of 21
Check and replace
1. PCB damaged, dry-soldered or short-circuited
2. R28 in PCB defective
3. Defective LED
LED indicato
r
no li
g
ht

Service Guide SP-HF360A
1.2.7 No Volume change when rotating VR
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 13 of 21
Check and replace
1. Check if the VR-related copper foil broken
2. VR1, VR2 defective
3. Or caused by the following components:
R5，R6，R1，R2，R13，CC1，MC1，MC2，MC3，R9，
R12, R15，R66，R18，R19，R20，R21，R22，CC4，MC4，
MC5，or MC6 defective
No volume chan
g
e when rotatin
g
VR

Service Guide SP-HF360A
1.2.8 No sound when input jack is used
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 164of 21
Check and replace
1. JK1 damaged
2. Or JK1-related copper coil in PCB
broken or dry-soldered or short-circuited
No sound when in
p
ut
j
ack is used

Service Guide SP-HF360A
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 % 0.8 0.8 ≦1
DISTOPTION@1kHz 1W OUT
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 5110 50 ≧40
11 HUM NOISE (VOLUME MAX;INPUT
SHORTING) m V 0.6 0.7 ≦2
12 HUM NOISE (VOLUME MIN INPUT SHORTING) m V 0.3 0.4 ≦1
Version 1.0 Page 15 of 21
Chapter 2. Specifications

Service Guide SP-HF360A
Version 1.0 Page 16 of 21
Chapter 3 Block diagram

Service Guide SP-HF360A
Activespeaker
Version 1.0 Page 17 of 21
Chapter 4 Exploded view

Service Guide SP-HF360A
Passive speaker
Version 1.0 Page 18 of 21
Chapter 4 Exploded view

Service Guide SP-HF360A
Active speaker
Serial
NO Description Part NO
1 Screw, 3.6*16, to fix the driver unit ring EP24220010
2 driver unit ring EP40910405
3 cloth cover EP41010178
4 Driver unit, A-78-38 EP16030078
5 wooden cabinet for active speaker EP53360001A
6 transformer, 230V 50HZ 9V-1.3A EP13500068
7 screw, 4*16PWM to fix the transformer EP24140019
8 power switch EP19030008
9 screw, 3*8BA,to fix the PCB hanger EP24010014
10 PCBA, SW-HF360A-YOMMO-1 EP1P360001
11 front panel for the active speaker EP40910406
12 big knob EP40711199
13 small knob EP40711200
14 IC TDA7266SA EPEC010224
15 IC 4558 EPEC020006
Passive speaker
Serial
NO Description Part NO
1 Screw, 3.6*16, to fix the driver unit ring EP24220010
2 driver unit ring EP40910405
3 cloth cover EP41010178
4 Driver unit, A-78-38 EP16030078
5 wooden cabinet for passive speaker EP53Y05101A
6 front panel for passive speaker EP40910407
Version 1.0 Page 20 of 21
Cha
p
ter 5 Part list

Service Guide SP-HF360A
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
Version 1.0 Page 22 of 21
Cha
p
ter 6. Im
p
ortant Notes