Table of Contents
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Table of Contents
Related Manuals for Genius SP-HF1255A
Summary of Contents for Genius SP-HF1255A
- Page 1 Service Guide SP-HF1255A SERVICE GUIDE KEY SYSTEM CORP...
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Page 2: Revision History
Service Guide SP-HF1255A Revision History Version Date Change 2009-12-22... -
Page 3: Table Of Contents
Service Guide SP-HF1255A Table of Contents Revision History………………………………………………………………….2 Table of contents……………………………………………………………..…3 Getting Start…………………………………………………….………………..4 Conventions Used in this Guide…………………………………………….…...4 Safety Precautions………………………………………………………….……4 Chapter 1. How to Handle Defective Returns………………………………..….5 1.2 Problem………………………………………………………………………6 1.2.1 No power，LED （indicator）unlighted………………………………...7 1.2.2 No sound…………………………………………………………….…….8 1.2.3 Right or left channel no sound….……….……….……….……..….…...…9 1.2.4 Noise………………………………….…………………………..…..…10... -
Page 4: Getting Start
Service Guide SP-HF1255A Getting Started Conventions Used in the Guide Pay Special Attention: Instructions that are important to remember and may prevent mistakes. Caution: Information that, if not followed, may result in damage to the product. Safety Precautions The following precautions should be observed in handing the speaker described in this guide: Place the speakers on a flat, level and stable surface. -
Page 5: Chapter 1 How To Handle Defective Returns
Service Guide SP-HF1255A Chapter 1 How to Handle Defective Returns 1.1 Overview Receiving Defective speaker from customers Verifying problems proceeding necessary tests FUNCTION NG Analyzing possible, Main function cause FUNCTION NG FUNCTION OK Deciding & Proceeding the Rectification methods Replace Necessary defective parts... -
Page 6: Problem
Service Guide SP-HF1255A 1.2 Problems Item Item Problem Description No power，LED （indicator）no light 1.2.1 1.2.2 No sound 1.2.3 Right or left channel no sound 1.2.4 Noise 1.2.5 LED indicator no light 1.2.6 Headphone jack output no sound 1.2.7 VR, headphone jack or line-in jack abnormal... -
Page 7: No Power, Led (Indicator) Unlighted
Or caused by the following: identify Defective transformer 1. Transformer secondary wire loosely Defective or damaged AC connected with 1CN1 jack causes cable or power switch SP-HF1255A AMPA. 2. Copper foil of SP-HF1255A AMP PCBA broken Solutions Repair or replace Re-solder or replace... -
Page 8: No Sound
Service Guide SP-HF1255A 1.2.2 No Sound No Sound Problem caused Analyze following defective and identify components the causes short-circuited, CN1 and CN2 in 1. U1, U2 in AMP dry soldered or AMP board is not PCBA broken properly connected 2. VR1，N2，1CN4 in... -
Page 9: Right Or Left Channel No Sound
Service Guide SP-HF1255A 1.2.3 Right or left channel no sound Right or left channel no sound Problem VR ， N2 PCB damaged, 1CN4 dry-soldered or Driver unit or speaker defective Analyze short-circuited; cable defective SP-HF1255A and identify loosely connected PCBA... -
Page 10: Noise
Service Guide SP-HF1255A 1.2.4 Noise Noise Problem Filter capacitor Driver units damaged /diode caused Woofer cabinet leaks, Analyze dry-soldered or vibration from too closed not well and identify damaged, long lead wire of the causes please check driver units C1, C14, C31，... -
Page 11: Led Indicators No Light
Problem 1. PCB damaged, dry-soldered or short-circuited 2. R3 in SP-HF1255A AMP PCB defective Analyze 3. Poor connection of 1CN1 in SP-HF1255A PCB and and identify power switch in rear panel the causes 4. Defective LED1 in SP-HF1255A AMP PCB... -
Page 12: Headphone Jack Output No Sound
Service Guide SP-HF1255A 1.2.6 Headphone jack output no sound Headphone jack no sound Problem N1 in 1255A AMP PCBA defective or its related copper foil broken Analyze and identify the causes Solutions Check and replace... -
Page 13: Vr, Headphone Jack Or Line-In Jack Abnormal
VR, headphone jack or line-in jack abnormal Problem Jack: Defective VR may cause VR3 N1 or 1CN4 in 1255A AMP Analyze PCBA and identify defective 1255A the causes VR1/VR2 in SP-HF1255A AMP PCBA having scratching sound when rotatin Solutions Check and replace Check and replace... -
Page 14: Chapter 2. Specification
Service Guide SP-HF1255A Chapter 2 Specifications Satellite Normal Description Unit Limit ≧20 RATED OUTPUT POWER @THD 10% 23.5 22.6 SENSITIVITY (1KHz) @RATED O/P 600±60 POWER SENSITIVITY (1KHz) 260±60 @1W O/P POWER MAX INPUT LEVEL 370±35 @1% THD ≦1 DISTOPTION@1kHz 1W OUT FREQUENCY RESPONSE 20±10... -
Page 15: Chapter 3 Block Diagram
Service Guide SP-HF1255A Chapter 3 Block diagram LINE IN 4588 POWER FILTER STA540SA HEADPHONE JACK POWER AMP SPEAKER SPEAKER... -
Page 16: Chapter 4. Part List
(woofer/tweeter) 21.8.920.0008 AMP PCBA, SP-HF1255A 21.1.003.0121 knob 21.4.014.0063 power switch 11.1.192.0003 transformer, 230V 50HZ/14V-2.5A 11.2.001.0090 woofer driver unit cloth cover, SP-HF1255A 11.6.005.0052 U1， STA540SA 11.1.170.0122 U2, 4558 11.1.170.0056 AC cable 11.3.001.0035 VR1/VR2, 16KG-B50K-L15 MID POSITIONING 11.1.030.0028 VR3, 16KG-B50K-L15 11.1.030.0009... -
Page 17: Chapter 5 Important Notes
Service Guide SP-HF1255A Chart 5 Important notes 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. -
Page 18: Chapter 6 Exploded View
Service Guide SP-HF1255A Chapter 6 Exploded view Right... -
Page 19: Left Satellite
Service Guide SP-HF1255A Chapter 6 Exploded view Left... -
Page 20: Chapter 7 Schematic Diagram
Service Guide SP-HF1255A Chapter 7 Schematic diagram...