KYE Systems Corp. Genius SP-HF2.0 1250 User manual

ServiceGuide SP-HF2.0 1250
SERVICE GUIDE
KYESYSTEMS CORP.
SP-HF2.0 1250
Version : 1.0
Version : 1.0 Page 1 of 15

ServiceGuide SP-HF2.0 1250
RevisionHistory
Version Date Change
1.0 02/03/2005
Version : 1.0 Page 2 of 15

ServiceGuide SP-HF2.0 1250
Table of Contents
Revision History …………………………………………………………………….2
Table of Contents ……………………………………………………………………3
Getting Started ………………………………………………………………………4
Conventions Used in this Guide ……………………………………….4
Safety Precautions ……………………………………………………..4
Chapter 1. How to Handle Defective Returns……………………………………..5
1.1 Overview …………………………………………………………..5
1.2 Problems …………………………………………………………...6
1.2.1 One or more channels no sound ………………..…7
1.2.2 Power LED (indicator) no light………………....…8
1.2.3 Volume , Treble, Bass no function……..…………..8
Chapter 2. Specifications …………………………………………………………9
Chapter 3. Block Diagram ……………………………………………………….10
Chapter 4. Exploded View ……………………………………………………….11
Chapter 5. Part List ………………………………………………………………13
Chapter 6. Schematic Diagram …………………………………………………..14
Chapter 7. Important Notes ………………………………………………………15
7.1 Packing Requirement for Sending the PCB Assembly by Post …..15
7.2 Short of Spare Parts while Repairing a Speaker System …………15
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ServiceGuide SP-HF2.0 1250
Getting Started
Conventions Used in this 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 handling 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 .
Disconnect the AC power cord from the AC outlet before performing
any maintenance on the speakers .
Do not perform any maintenance with wet hand .
Prevent foreign substances, such as water, other liquids or chemicals ,
From entering the speakers while performing maintenance procedures
on the speakers .
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ServiceGuide SP-HF2.0 1250
Chapter 1. How to Handle Defective Returns
1.1 Overview
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Verifying problems
Proceeding necessary tests
Receiving Defective speakers form
Customers
Analyzing possible malfunction
causes
Deciding & proceeding the
rectification methods
Replace necessary defective parts
Proceeding tests to
Verif
y
if the s
p
eaker is
functionin
g
normall
y
R
etu
rn
t
h
e
spea
k
e
r
s
w
i
t
h
p
r
ope
r
repackaging to customers
Function NG
Function OK
Function OK
Function NG

ServiceGuide SP-HF2.0 1250
1.2 Problems
Item Problem Description
1.2.1 Oneormorechannelsnosound
1.2.2 PowerLED(indicator)nolight
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1.2.3 Volume,Treble,Bassnofunction

ServiceGuide SP-HF2.0 1250
Attention
1.2.1 One or more channels no sound
Problem
Solutions
Version : 1.0 Page 7 of 15
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 .
One or more channels no sound
Broken or short circuit Defective U1~U4 Speaker cable
dis-connect or speaker
damaged
Check solder points on
PCB
Check and Replace
defective IC
Re-connect speaker
cable or replace
defective speaker(s)
Analyzer and
Identify the Causes

ServiceGuide SP-HF2.0 1250
1.2.2 Power LED (indicator) no light
Problem
Solutions
1.2.3 Volume , Treble , Bass no function
Problem
Solutions
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Power LED (indicator) no light
Power switch or LED Defective,D1-4,
ZD1,ZD2,R37,R3
8,R47
AC cord of transformer
disconnected or
defective
Re-solder or replace
defective component(s)
Analyzer and
Identify the Causes
Volume , Treble ,Bass no
function
Broken or short circuit DefectiveU1,VR1,VR2,
VR3, R11-12,R1-2,
Check solder points on PCB
Analyzer and
Identify the Causes
Check and Replace defective
components

ServiceGuide SP-HF2.0 1250
Chapter 2. Specifications
NO. Description Unit Specifications
1 Out Power at THD 10% W ≧20
2 Sensitivity mV 300 ±70
3 Freq. Response (Ref:-3dB) Hz 20Hz~20KHz ±10%
4 Separation dB ≧40
5 S/N ratio dB ≧50
6 Hum & Noise Vol:max mV ≦10
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ServiceGuide SP-HF2.0 1250
Chapter 3. Block Diagram
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AUDIO IN
Bass
Control
Power
Amplifier
Host Speaker
AC IN
Satellite Speaker
Treble
Control
Volume
Control
Transformer Filter