KYE Systems Corp. SP-HF2020 User manual

Service Guide Model No : SP-HF2020
SERVICE GUIDE
KYESYSTEMS CORP.
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Service Guide Model No : SP-HF2020
Revision His ory
Version Date Change
1.0 11/04/2011 First Release
2.0 14/04/2011 Data Update
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Service Guide Model No : SP-HF2020
Table of Con en s
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 Speaker no sound
1.2 Power LED no light
1.3 Headphone no sound
1.4 Bass/Volume no function
Chapter 2. Specifications .10
Chapter 3. Block Diagram .11
Chapter 4. Exploded View 12 & 13
Chapter 5. Part List 14
Chapter 6. Schematic Diagram ..15
Chapter 7. Important Notes 16
7.1 Packing Requirement for Sending the PCB Assembly by Post ..16
7.2 Short of Spare Parts while Repairing a Speaker System 16
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Service Guide Model No : SP-HF2020
Ge ing S ar ed
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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Service Guide Model No : SP-HF2020
Chap er 1. How o Handle Defec ive Re urns
Overview
Receiving Defective speakers from
Customers
Function NG
__ __
Analyzing possible malfunction
causes
Function NG Deciding & proceeding the
rectification methods
Function OK
Replace necessary defective parts
Function OK
Return the speakers with proper
repackaging to customers
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Service Guide Model No : SP-HF2020
Problems
Item Problem Description
1.1 Speaker no sound
1.2 LED no light
1.3 EQ/Source button no function
1.4 Remote control no function
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Service Guide Model No : SP-HF2020
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.
1.1 One or more channels no sound (Line in/Coaxial in no function)
Problem
Analyze
and
Identify
Cause
Solution
Speaker no sound
Component cold
solder or Short
Circuit
Defective IC1,IC3
& IC4
Speaker cable disconnect,
JK2,CN5, CN6 defective
or speak
er damaged
Check solder
point on PCBA
Check and
Replace defective
IC
Reconnect speaker cable or
replace defective speaker
driver and component
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Service Guide Model No : SP-HF2020
1.2 LED no light
Problem
Analyzer and
Identify the Causes
Solutions
1.3 EQ/Source no Function
Problem
Analyzer and
Identify the Causes
Solution
LED no light
Component cold
solder or Short
Circuit
Defective
IC5,IC6,IC7,U101
,F1,T1,U1
or
U2
Power Switch or LED
defective
Check solder
point on PCBA
Check and
Replace defective
IC
or Fuse
Replace defective Power
Switch or LED
EQ/Source/Volume no
function
Component cold
solder or Short
Circuit
U101,S100,VR100 or
S101 defective
Check solder
point on PCBA
Replace defective IC,VR
or Switch
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Service Guide Model No : SP-HF2020
1.4 Remote control no function
Problem
Analyzer and
Identify the Causes
Solution
Remote control no function
Component cold
solder or Short
Circuit
RF100 or Remote hand
set defective
Check solder
point on PCBA
Replace defective RF100
or Remote hand set
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Service Guide Model No : SP-HF2020
Chap er 2. Specifica ions
NO.
Descrip ion Uni
Specifica ions
1 Ou Power a THD 1% W
≧23
2 Sensi ivi y mV
300± 60
3 Freq. Response (1KHz -3dB) Hz
31~16K ± 10%
4 Separa ion dB
≧
≧≧
≧ 40
5 S/N ra io dB
≧
≧≧
≧ 70
6 Hum & Noise (Vol.: max) mV
≦
≦≦
≦ 2
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