KYE Systems Corp. Genius SW-U2.1 200 User manual

Service Guide SW-U2.1 200
Version No. 1.0 Page 1 of 18
Service Guide
KEY SYSTEM CORP

Service Guide SW-U2.1 200
Version No. 1.0 Page 2 of 18
Modification Record:
Version Date Modification
1.0 2011-8-18

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Version No. 1.0 Page 3 of 18
Content
Document Version ............................................................................................................................ 2
Contents............................................................................................................................................ 3
Use.................................................................................................................................................... 4
Use Guide .................................................................................................................................. 4
Safety Caution ........................................................................................................................... 4
Chapter 1: How to Dispose Returned Defective Products ............................................................... 5
1.2 Troubles ............................................................................................................................... 6
1.2.1 No Power and Indicator Lamp Inoperative ............................................................... 7
1.2.2 No Sound................................................................................................................... 8
1.2.3 No Sound from Left or Right Channel...................................................................... 9
1.2.4 No Bass.................................................................................................................... 10
1.2.5 Noise and Current Noise ......................................................................................... 11
1.2.6 Power Light Inoperative.......................................................................................... 12
Chapter 2 Product Specifications ................................................................................................... 13
Main/ Auxilary Spearker .................................................................................................. 13
Chapter 3 Block Diagram............................................................................................................... 14
Chapter 4 Rendering after Assembly......................................................................................... 15-16
Subwoofer ............................................................................................................................... 15
Satellite.................................................................................................................................... 16
Chapter 5 Material List................................................................................................................... 17
Subwoofer ............................................................................................................................... 17
Satellite.................................................................................................................................... 17
Chapter 6 Electric Schematic Diagram .......................................................................................... 18

Service Guide SW-U2.1 200
Version No. 1.0 Page 4 of 18
Use
Use Guide
Special Attention: this guide contributes to remember and prevent errors.
Warning: if information does not allow, it is possible to cause the product damaged.
Safety Caution:
This guide requires the cautions given below should be followed during operation of the speaker:
Flatly place the product and don’t place the speaker in such hostile environments as smoke,
vibration, air containing salt or oil, or other corrosive air or smoke;
Don’t knock the speaker
Don’t make any item to fall into the subwoofer from the phase guiding barrel; otherwise it is
possible to cause electric shock or fire.
Keep away from other electric equipment as much as possible to provide better heat dissipation;
Prevent such foreign matters as water or other chemical liquids from entering the speaker during
maintenance of the speaker.

Service Guide SW-U2.1 200
Version No. 1.0 Page 5 of 18
Chapter 1: How to Dispose Returned Defective Products
1.1 General
Receive the speaker returned by a consumer
Find out troubles in a function test
Verify the trouble
and necessar
y
test
Analyze possible causes for the troubles
Replace some defective parts to be necessarily replaced
Retest
Return the qualified product to the consumer after repacking.
Test NG Test Ok
Decide an effective repair service scheme

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Version No. 1.0 Page 6 of 18
1.2 Troubles
Description of troubles
1.2.1 No Power and LED Indicator Lamp Inoperative
1.2.2 No Sound
1.2.3 No Sound from Left or Right Channel
1.2.4 No Bass
1.2.5 Noise and Current Noise
1.2.6 LED Indicator Lamp Inoperative

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Version No. 1.0 Page 7 of 18
* Note:
Please follow the sequence of single flow chart.
The flow chart is the optimal sequence recommended for removal of the troubles
1.2.1 No Power and LED Indicator Lamp Inoperative
No Power and LED Indicator
Lamp Inoperative
1. USB power line
defective and damaged
2. Plug of USB power line
inserted improperly
3. Power line fell
1. USB power line welded
improperly/ welded falsely/
broken
2. Open circuit of USB power
line
Inspect/ repair Inspect/ repair/ replace

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1.2.2 No Sound
No Sound
1. Short circuit, open circuit
and no power of PCB
2. Connecting line damaged
or defective, short circuit
and open circuit,
(COND3). (JK1)
3. Signal input line
connected improperly/ no
signal
1. Element of sound channel unit
of PCB damaged, and U1, U2,
RR1, horn lead and horn
damaged
Inspect/ repair Inspect/ repair/ replace
1. Potentiometer VR1 damaged
2. Plug of line panel separating
from and poorly connecting
with the socket
3. 9P FPC fell/ connected
improperly
Inspect/ repair

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Version No. 1.0 Page 9 of 18
1.2.3 No Sound from Left/ Right Channel
No Sound from Left/ Right
Channel
1. Short circuit/open circuit and
damage of PCB
2. VR1 potentiometer defective
and damaged
3. Signal lines of two sides of
left and right channels
defective or damaged
1. Connecting lines of two sides
of left and right channels
defective or dama
g
ed
1. Unit circuit elements U1, U2,
VR1 and JK3/ CON3/JK1 of
left/ right channel damaged,
open circuit, short circuit, fell
Inspect/ repair/ replace Inspect/ repair
3. Horns on two side of left and
right channels defective or
damaged
4. Poor connection of
connecting lines of left and
right channels
5. 2RCA socket INT/ oxidized
and falsely welded
Replace/ repair

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1.2.4 No Bass
No Bass
1. PCB via hole and INT
2. CON2 header pin INT
3. U2 power voltage
abnormal
4. CON2 line fell/
connected improperly
1. Elements of bass unit lines,
such U2, L7, L8, R27, L5, L6,
L10, R30, C11
Inspect/ repair/ replace Inspect/ repair
1. 4P bass horn line defective
2. Horn lines broken or falsely
welded
3. Horn defective
Replace/ repair

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Version No. 1.0 Page 11 of 18
1.2.5 Noise and Current Noise
Noise and Current Noise
1. Power failure, filter capacitor
C33 and C27 damaged resulting
in large interference from voltage
ripple provided for IC by power
supply; PCB becoming damp,
dirty or broken.
2. Signal input line connected
improperly/ no signal
1. Long use of potentiometer
resulting in poor connection
of knob shrapnel
2. U1 and U2 defective,
damaged and short circuit
resulting in oversized load
current of power supply to
reduce voltage.
Inspect/ repair/ replace Inspect/ repair/ replace
Poor connection of the
earthing line of signal line,
CON3/ signal line
defective and damaged
Replace/ repair

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1.2.6 LED Indicator Lamp Inoperative
LED Indicator Lamp
Inoperative
1. LED1 damaged or inoperative
2. Copper foil of lamp base of
PCB broken
3. Q1/Q2 damaged
4. CON3 line fell/ connected
improperly
Replace/ repair

Version No. 1.0
Service Guide SW-U2.1 200
Chapter 2 Product Specifications
Page 13 of 18

Service Guide SW-U2.1 200
Version No. 1.0 Page 14 of 18
Chapter 3 Block Diagram
Chapter 4 Rendering after Assembly
Signal input Earphone input
Master volume tuning
Left channel
output
Right channel
output Bass output
Power amplification
NS4203
Power amplification
NS4203

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Subwoofer
Satellite

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Chapter 5 Material List

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Subwoofer:
Ref. NO Description Part NO.
1 KNOB AMP020001. 01G
2 FRONT PANEL AMP024401. 00G
3 VOLUME PCBA ASP024401. G01
4 WRAP BOARD AHB024401. 00G
5 AMPLIFIER PCBA ASP024402. G02
6 METAL BAR AMB000006. 00G
7 PAPER TUBE AHC000019. 00G
8 SPEAKER AMK340062. G01
9 FOOT AMP702304. 00G
10 IC NS4203 SOP-16 AEU000110. 00G
11 2RCA SOCKET ANJ000086. 00G
Satellite:
Ref. NO Description Part NO.
1 FRONT CABINET AMP024402. 00G
2 SPEAKER AMK340063. G01
3 SEALING COVER AMP724404. 00G
4 BACK CABINET AMP724403. 00G

Version No. 1.0 Page 18 of 18
Service Guide SW-U2.1 200
Chapter 6 Electric Schematic Diagram