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Service Guide 

                                SW-HF2.1 1205 

1.2.4 Noise 

 

                           

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Problem 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

       

 

 

Analyze 

and identify 

the causes   

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  Solutions 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Filter capacitor 

/diode 

dry-soldered or 

damaged, 

please check 

1D1 1D2 1D3 

1D4 1C18 

1C19 in AMP 

defective or 

not; 

The power 

supply of each 

IC is normal or 

not 

 

Or caused by 

vibration from too 

long lead wire of 

driver units 

Driver units damaged 

Woofer cabinet leaks, 

closed not well 

 

     

Repair 

 

 

Check and 

replace  

 

 

 

Repair or 

replace 

 

Noise

 

 

 

 

 

 10

Summary of Contents for Genius SW-HF2.1 1205

Page 1: ...Service Guide SW HF2 1 1205 SERVICE GUIDE KEY SYSTEM CORP Model No SW HF2 1 1205 1...

Page 2: ...Service Guide SW HF2 1 1205 Revision History Version Date Change 1 0 2010 4 16 2...

Page 3: ...1 1 Overview 5 1 2 Problem 6 1 2 1 No power No sound LED indicator unlighted 7 1 2 2 Sub Woofer No sound 8 1 2 3 Right or left channel no sound 9 1 2 4 Noise 10 1 2 5 LED indicators no light 11 Chapte...

Page 4: ...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...

Page 5: ...mers FUNCTION NG Verifying problems proceeding necessary tests FUNCTION NG FUNCTION OK Analyzing possible Main function cause Deciding Proceeding the Rectification methods Replace Necessary defective...

Page 6: ...Guide SW HF2 1 1205 1 2 Problems Item Item Problem Description 1 2 1 No power LED indicator no light 1 2 2 Sub woofer No sound 1 2 3 Right or left channel no sound 1 2 4 Noise 1 2 5 LED indicator no...

Page 7: ...tor unlighted No Sound Problem Analyze and identify the causes Solutions Defective transformer Defective or damaged AC cable or power switch Or caused by the following 1 Transformer secondary wire loo...

Page 8: ...lutions Repair or Replace Replace Repair re solder or Replace SUB Woofer No Sound Driver unit or speaker cable defective or loosely connected AMP IC IC1 Destroyed SW HF2 1 1205 AMP PCBA Or caused by t...

Page 9: ...ions AMP IC IC2 IC3 defected in SW HF2 1 1205 AMP PCBA Driver unit or speaker cable defective or loosely connected Audio cable defective or loosely connected Control panel 4VR1 defected 4CN2 defective...

Page 10: ...ode dry soldered or damaged please check 1D1 1D2 1D3 1D4 1C18 1C19 in AMP defective or not The power supply of each IC is normal or not Or caused by vibration from too long lead wire of driver units D...

Page 11: ...e Guide SW HF2 1 1205 1 2 5 LED indicator no light Problem Analyze and identify the causes Solutions LED indicator no light 1 PCB damaged dry soldered or short circuited 2 LED defective Check and repl...

Page 12: ...B 0 2 0 2 1 10 CHANNEL SEPARATION ONE CHANNELIN OTHER CHANNEL INPUT SHORTING d B 49 49 40 11 HUM NOISE VOLUME MAX INPUT SHORTING m V 0 2 0 3 2 12 HUM NOISE VOLUME MIN INPUT SHORTING m V 0 2 0 2 1 Woo...

Page 13: ...Service Guide SW HF2 1 1205 Chapter 3 Block diagram 4588 FILTER BASS UTC2030 POWER AMP UTC2030 POWER AMP UTC2030 POWER AMP VOL LINE IN POWER R SPEAKER L SPEAKER SW SPEAKER 13...

Page 14: ...11 1 150 0014 Dynatron Q1 11 1 170 0017 AMP IC IC2 IC3 IC1 11 1 170 0056 IC IC4 11 1 260 0713 AMP PCB 11 3 005 0025 2P cable LED light cable 11 1 030 0009 potentiometer 4VR2 4VR1 11 1 260 0143 Contro...

Page 15: ...sary 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...

Page 16: ...Service Guide SW HF2 1 1205 Chapter 6 Exploded view Subwoofer 6 1...

Page 17: ...Service Guide SW HF2 1 1205 Chapter 6 Exploded view Satellite 7 1...

Page 18: ...7 1C13 L IN R IN 1R7 1R8 1C2 1C1 1CN3 1CN3 183J 183J 1C28 1C29 1R6 1R5 91K 1C13 1R23 1R31 1C30 1R33 1R32 1C11 1C12 IN5392 IN5392 2200UF 25V T2 B50K 10UF 50V 7 6 5 4 3 2 1 8 22K 10K 104 2200UF 25V 224...

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