Full Text Searchable PDF User Manual
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Version:1.0
Total 14 Pages (Cover Page included)
Version: 1.0 Page 1/13
Version Date
Changes
1
．
0
Official Release
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Revision History
Version: 1.0 Page 2/13
Revision History………………………………………………………………………..1
Table of Contents………………………………………………… ………….2
Getting Started………………………………………………… ……….……………....3
Conventions Used in this Guide………………… ………...……………….3
Safety Precautions……………………………… ………………...………..3
Chapter1. How to Handle Defective Returns………………… ……………………….4
1.1 Overview……………………………………………………………….4
1.2 Problems………………………………………………………………..5
1.2.1 Power LED (indicator) Unlight…………………...……………......6
1.2.2 Does not work or one channel no sound……………………….…..7
1.2.3 Noise……………………………………………………………….7
Chapter2. Specifications………………………………………………………………..8
Chapter3. Block Diagram……………………………………………………………....9
Chapter4. Exploded View……………………………………………………………...10
Chapter5. Part List…………………………………………………………………….11
Chapter6. Important Notes…………………………………………………………....12
6.1 Packing Requirement for sending the PCB Assembly by post……….…12
6.2 Short of Spare Parts while Repairing a Speaker System…………….….12
Chapter7. Circuit Schematic……………………………………………………………13
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Table of Contents
Version: 1.0 Page 3/13
Conventions Used in this Guide
Pay Special Attention: Instructions that are important to
remember and may prevent mistakes.
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 substance, such as water, other liquids or chemicals, from entering the
speakers while performing maintenance procedures on the speakers.
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Getting Started
Attention
Caution: Information that, if not followed, may result in
damage to the product.
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1.1 Overview
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Chapter 1. How to Handle Defective Returns
Receiving Defective
Speakers
from Customers
Verifying problems&
Proceeding necessary tests
Analyzing possible
Malfunction causes
Deciding & proceeding
the rectification methods
Replacing necessary
Defective parts
Proceeding tests
To verify if the speaker is
functioning normally
Functioning OK
Return the speakers with
Proper repackaging to customers
Functioning NG
Functioning OK
Functioning NG
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1.2 Problems
Item Problem descriptions
1.2.1 Power LED (indicator) unlight
1.2.2 Does not work or one channel no sound
1.2.3 Noise
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Attention
1.2.1 Power LED (indicator) unlight
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Please follow the numbered sequence marked withing parenthesis given in individual
Flow chart, in that this is the best-recommended sequence to rectify the problems.
Problem
Analyze and
Identify the
Causes
Solutions
Power LED (indicator) unlight
Diode D1.2.5.6
burnt
Defective power
Switch or LED
Secondary wire
Of transformer is
Disconnected or
defective
Resolder or replace defective component(s)
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1.2.2 Does not work jor jone channel no sound
1.2.3 Noise
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Problem
Analyze and
Identify the
Causes
Solutions
Does not work or
One channel no sound
Broken or
Short circuit
Defective IC
Defective
Audio cable
Replace
Audio cable
Check solder
Points on PCB
And resolder
defective one(s)
Check and replace
Defective IC
Problem
Analyze and
Identify the
Causes
Solutions
Noise
Defective VR
Defective IC
Check and replace
defective component(s)
Replace
Defective VR
Replace defective IC
Component(s) around
IC is/are defective
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No. DESCRIPTION
UNIT NOMINAL
LIMIT
1
INPUT SENSITIVITY AT 10%
mV
340
340+/-50
2
DISTORTION AT 1 KHz
%
0.15
<0.5
3
OUTPUT POWER AT 10% DISTORTION
W
18
18+/-1
4 S/N
RATIO
dB
74
>60
5 CHANNEL
SEPARATION
dB
49
>40
6 FREQUENCY
RESPONSE
(DOWN 3dB) (LOW)
(HIGH)
Hz
KHz
20
20
+/-10%
+/-10%
7
HUM LEVEL (AT VOL. MIN.)
HUM LEVEL (AT VOL. MAX.)
mV
mV
1
2.5
<3
<5
8
OPERATING VOLTAGE MAX.253VAC
MIN. 207VAC
TEST
CONDITION:
1) LOAD 4
Ω
2
）
RATED POWER 1 W
VOLUME AT MAX.
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Chapter 2. Specifications
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Chapter 3. Block Diagram
R.IN
L.IN
R.OUT
L.OUT
R.CH
SPEAKER
L.CH
SPEAKER
POWER
AMPLIFI
E
R
VOLUME
CONTROL
AC IN
TRANSFORMER
POWER SWITCH
FIL
T
E
R
AUDIO INPUT
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Chapter 4. Exploded View
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Ref. No.
Description
RS Part No.
Mfr’s Part No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
AC Cord, 5.9’,Black Color 250V/2.5A 2PIN,CE
Output Panel, SP-HF1250X, Black Color
RCA, Yellow Color
Input Panel, SP-HF1250X, Black Color
Rear board, SP-HF1250X, Black Color 9T MDF
Transformer, 230V, 8V/250mA
Function PCB Assembly, SP-HF1250X, 94V0
Wrap board(L) SP-HF1250X, 12T MDF
Speaker, 1” 4
Ω，
15W
Speaker, 5.25” 4
Ω
, 20W, Magnetically Shielded
Screw, HSA3.5x16mm, Black
Cloth frame(L), SP-HF1250X, Black Color
Badge, SP-HF1250X, Silver Color ABS
Knob, SP-HP1250X, Silver Color HIPS
Button, SP-HF1250X, Silver Color HIPS
Control PCB Assembly, SP-HF1250X, 94V0
Screw, PWPA2.6x10mm, Black
Rubber Foot One side tape glue
Screw, PPB 3x8mm, Black
Nut M4, Black Color
Screw, BPA 3.5x20mm, Black
Screw, PWPB M4x16mm, Black
Screw, BPA 3x12mm, Black
Screw, BPA 3x10mm, Black
Cloth frame(R), SP-HF1250X, HIPS Black Color
Wrap board(R),SP-HF1250X, 12T MDF
Terminal board, SP-HF1250X, Black Color HIPS
17U2115125100-0
1
0114HIPS00007-0
1
2021184084101-0
2
0114HIPS00021-0
1
1003040910200-0
1
2225400020001-0
1
180103594V001-0
1
9401040012500-0
3
0820150401312-0
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Chapter 5. Part List
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19
20
21
22
23
24
25
26
27
1
084020045A112-0
3
4102H35016A06-0
2
9101086078093-0
1
01070ABS03001-
01
0107HIPS00001-0
1
0107HIPS81001-0
2
180303594V001-0
1
4102N26010A02-0
1
4311020050010-0
1
4101P30008B02-0
1
4107300402020-0
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1
4102B35020A02-0
1
4101N40060B02-0
1
4102B30012A02G
01
4102B30010A02-0
1
9101086078105-0
1
9401030011760-0
1
0114HIPS00017-0
1
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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 spesker systems waiting to
be repaired,it would be recommended to take the necessary parts from one
Speaker system,so that you may haye the as many speaker systems
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Chapter 6. Important Notes
Version: 1.0 Page 15/13
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Chapter 7. Circuit schematic