KYE Systems Corp. Genius SP-HF1201A User manual

Service Guide Model No : SP-HF1201A
SERVICE GUIDE
KYESYSTEMS CORP.
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Service Guide Model No : SP-HF1201A
Revi ion Hi tory
Version Date Change
1.0 16/04/2010 First Release
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Service Guide Model No : SP-HF1201A
Table of Content
Revision History …………………………………………………………………….2
Ta le 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&18
Chapter 7. Important Notes ………………………………………………………19
7.1 Packing Requirement for Sending the PCB Assem ly y Post …..19
7.2 Short of Spare Parts while Repairing a Speaker System …………19
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Service Guide Model No : SP-HF1201A
Getting Started
Conventions Used in this Guide
Pay Special Attention : Instructions that are important to remem er and
may prevent mistakes .
Caution : Information that, if not followed, may result in damage to the
product .
Safety Precautions
The following precautions should e o served in handling the speaker
Descri ed in this guide :
Place the speakers on a flat, level and sta le surface.
Do not place the speakers in environments su ject to mist, smoke,
vi ration, 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 su woofer 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 efore performing
any maintenance on the speakers .
Do not perform any maintenance with wet hand .
Prevent foreign su stances, 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-HF1201A
Chapter 1. How to Handle Defective Return
Overview
Receiving Defective speakers from
Customers
Function NG
__ __
Analyzing possi le 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-HF1201A
Pro lems
Item Pro lem Description
1.1 Speaker no sound
1.2 Power LED no light
1.3 Headphone no sound
1.4 Bass/Tre le/Volume no function
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Service Guide Model No : SP-HF1201A
Attention
Please follow the num ered sequence marked within parenthesis given in individual Flow
chat, in that this is the est-recommended sequence to rectify the pro lems.
1.1 One or more channels no sound (Line in/Audio in jack no function)
Pro lem
Analyze
and
Identify
Cause
Solution
Speaker no sound
Component cold
solder or Short
Circuit
Defective U8
Speaker ca le disconnect,
Jack2 or J2 defective or
speaker damaged
Check solder
point on PCBA
Check and
Replace defective
IC
Reconnect speaker ca le or
replace defective speaker
driver and component
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Service Guide Model No : SP-HF1201A
1.2 Power LED no light
Pro lem
Analyzer and
Identify the Causes
Solutions
1.3 Headphone no sound
Pro lem
Analyzer and
Identify the Causes
Solution
Power LED no light
Component cold
solder or Short
Circuit
Defective
U1,U2,U3,T1 or
F1
Power Switch or LED
defective
Check solder
point on PCBA
Check and
Replace defective
IC or Fuse
Replace defective Power
Switch or LED
Headphone no sound
Component cold
solder or Short
Circuit
JK1 Phone jack defective
Check solder
point on PCBA
Replace defective JK1
Phone jack
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Service Guide Model No : SP-HF1201A
1.4 Bass/Tre le/Volume no function
Pro lem
Analyzer and
Identify the Causes
Solution
Bass/Volume no function
Component cold
solder or Short
Circuit
VR1 or VR2 defective
Check solder
point on PCBA
Replace defective VR1 or
VR2
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Service Guide Model No : SP-HF1201A
Chapter 2. Specification
NO. De cription Unit Specification
1 Out Power at THD 10% W
≧15
2 Sen itivity mV
600± 50
3 Freq. Re pon e (1KHz -3dB) Hz 65~20K ± 10%
4 Separation dB
≧
≧≧
≧ 40
5 S/N ratio dB
≧
≧≧
≧ 70
6 Hum & Noi e (Vol.: max) mV
≦
≦≦
≦ 2
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Service Guide Model No : SP-HF1201A
Chapter 3 Block Diagram
Audio in
LCH & RCH
Headphone
output
LCH & RCH
Power Sw, Tone &
Volume control
Audio
Amplifier IC
MP7742DF
LCH
RCH
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PRE-Amplifier
Line in
LCH & RCH

Service Guide Model No : SP-HF1201A
Chapter 4. Exploded View
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Service Guide Model No : SP-HF1201A
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Service Guide Model No : SP-HF1201A
Chapter 5. Part Li t
No
DESCRIPTION Qty UNIT Part No.
1
７８Ｌ１２ IC
1 IC1
2 MP7745DF IC 1 U1
3 BPC817 IC 1 U3
4
YJ-KB２８０６Ａ Transformer 1 T1
5 GBP206 Rectifier 1 D1
6
ＦＳＤＭ０４６５ＲＴ IC
1 U1
7
TL431 IC
1 U2
8
MUR620CT
2 D4
9 POWER CORD 2P 1
VPE003012-002
0
10 SPK UNIT 1 FSI541508-1600
11 SPK UNIT 1 FSA521540-440
0
12 RCA CABLE 1
VRC220001-001
0
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Service Guide Model No : SP-HF1201A
Chapter 6. Schematic Diagram
Pls refer to Next Pages:
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Service Guide Model No : SP-HF1201A
Chapter 7. Important Note
7.1 Packing Requirement for Sending the PCB Assem ly y Post
PCB assem ly is a kind of sophisticated electronic circuit oard. Well
packing will e required when sending them y post.
* Some sophisticated IC components are mounted on the PCB assem ly,
hence it is necessary to pack each PCB assem ly with a separate static
protecting ag, in order to avoid static electricity.
* Relia le external packing is also very important when sending PCB
assem ly y post, in that it would avoid unnecessarily lost or damage.
7.2 Short of Spare Parts while Repairing a Speaker System
If you are short of spare parts when you have some speaker systems waiting
to e repaired, it would e recommended to take the necessary parts form
one speaker system, so that you may have the as many speaker systems.
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