KYE Systems Corp. Genius SW-G2.1 1200 User manual

Service Guide SW-G2.1 1200
Version No. 1.0 Page 1 of 21
Service Guide
KEY SYSTEM CORP

Service Guide SW-G2.1 1200
Version No. 1.0 Page 2 of 21
Modification Record:
Version Date Modification
1.0 2011-8-18

Service Guide SW-G2.1 1200
Version No. 1.0 Page 3 of 21
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
1.2.7 No Sound from Earphone Input Socket Interface ................................................... 13
Chapter 2 Product Specifications ................................................................................................... 14
Chapter 3 Block Diagram............................................................................................................... 15
Chapter 4 Rendering after Assembly......................................................................................... 16-17
Subwoofer ............................................................................................................................... 16
Satellite.................................................................................................................................... 17
Chapter 5 Material List..............................................................................................................18-19
Subwoofer ............................................................................................................................... 18
Satellite.................................................................................................................................... 19
Chapter 6 Electric Schematic Diagram ..................................................................................... 20-21

Service Guide SW-G2.1 1200
Version No. 1.0 Page 4 of 21
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-G2.1 1200
Version No. 1.0 Page 5 of 21
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 21
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
1.2.7 No Sound Output from Earphone after Installation of Earphone

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Version No. 1.0 Page 7 of 21
* 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. The problems of power
switch resulting in
damage
2. Switching power panel
damaged
Causes given below
1. Loose plug line for
connecting CN2 and CON2
loose
2. IC: Damage of U1, U2, U3
and U5 resulting in copper
foil broken or damaged
3. R36 resistance damaged
4. LED damaged
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)
3. CON3-CON6 or
CON5-CON4 lines
broken .
1. IC: U1, U2, U4, U5 and U6
defective or damaged
Inspect/ repair Inspect/ repair/ replace
1. RCA: JK2/ JK3 defective or
damaged
2. Open circuit of copper sheet
of sockets JK4/ JK5
3. Potentiometer defective or
damaged
Inspect/ repair

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Version No. 1.0 Page 9 of 21
1.2.3 No Sound from Left/ Right Channel
No Sound from Left / Right
Channel
1. Short circuit and damage
of PCB
2. JK2, JK3, JK4 and JK5
defective or damaged
3. CON3,CON6, CON5,
CON4 signal lines
connected poorly
1. Unit circuit element U1, U2,
R1 and U6 of left/ right
channel damaged
Inspect/ repair/ replace Inspect/ repair
1. Horns on two side of left and
right channels defective or
damaged
2. Poor connection of
connecting lines of left and
right channels
Replace/ repair

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1.2.4 No Bass
No Bass
1. PCB copper sheet of
power amplifier broken
2. Plug and socket of horn
line loose
3. Horn lines broken
1. U4 and U5 defective or
damaged
2. Voltage-stabilizing circuit of
power supply damaged, short
circuit of DZ1 and DZ2 or
open circuit of R14 and R15.
Inspect/ repair/ replace Inspect/ repair
1. Horns defective or damaged
Replace/ repair

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Version No. 1.0 Page 11 of 21
1.2.5 Noise and Current Noise
Noise and Current Noise
1. Switching power supply
panel damaged.
2. Filter capacitor of power
supply C14 and C15
defective or damaged
1. Integrated circuit U1, U2, U3
U4, U5 and U6 damaged or
copper sheet broken
2. DZ1 and DZ2 damaged.
Inspect/ repair/ replace Inspect/ repair/ replace
1. Poor contact of earthing line
of CON3-CON6 and
CON5-CON4 signal lines
2. RCA: copper sheet of earthing
line of JK2 broken
3. Potentiometer defective or
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. U3 and R36 damaged
Replace/ repair

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1.2.7 No Sound Output from Earphone after Installation of Earphone e
No Soun
d
Output from
Earphone after
Installation of Earphone
1. Copper foil broken by JK 5
earphone socket to result in
poor contact during use
2. JK 5 earphone socket
defective or damaged
Replace/ repair

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Service Manual SW-G2.1 1200
Chapter 2 Product Specifications

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Chapter 3 Block Diagram
Signal input Earphone input
Calculation amplification
JRC4558
Bass tuning
Master volume tuning Earphone amplification
JRC4558
Left channel output
Right channel outputBass output
Power amplification
TDA2030
Power amplification
TDA2030
Power amplification
TDA2030A
Power supply

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Chapter 4 Rendering after Assembly
Subwoofer

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Satellite

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Chapter 5 Part List
Subwoofer
Ref. NO Description Part NO.
1 KNOB AMP024902. 00G
2 FRONT PANEL AMP024901. 00G
3 SPEAKER AMK440020. G03
4 WRAP BOARD AHB024901. 00G
5 POWER PCBA AEM100023. 00G
6 METAL BAR AMB000006. 00G
7 2RCA SOCKET ANJ000093. 00G
8 2RCA SOCKET ANJ000003. 00G
9 BACK BOARD AHB024902. 00G
10 SWITCH AES000004. 01G
11 VOLUME PCBA ASP024902. G01
12 RUBBER FOOT AHR000060. 00G
13 IC TDA2030A(import) AEU000006. 02G
14 IC TDA2030A (domestic) AEU000006. 03G
15 IC SJ4558 DIPS AEU000008. 04G
16 IC LM7809 AEU000033. 02G
17 AMPLIFIER PCBA ASP024901. G01
18 HEAT SINK AHS000052. 00G

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Satellite
Ref. NO Description Part NO.
1 FRONT CABINET AMP024701. 00G
2 SPEAKER AMK509002. G01
3 SEALING COVER AMP724903. 00G
4 BACK CABINET AMP724704. 00G

Service Guide SW-G2.1 1200
Version No. 1.0 Page 20 of 21
Chapter 6 Electric Schematic Diagram