Service Guide SW-2.1 850 Table of Contents Revision History Table of Contents Getting Started Conventions Used in this Guide Safety Precautions Chapter 1. How to Handle Defective Returns 1.1 Overview 1.2 Problems 1.2.1 Satellite L/R channels no sound 1.2.2 Woofer channel no sound 1.2.3 Woofer no power...
Service Guide SW-2.1 850 Getting Started Conventions Used in this 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 handling the speaker described in this guide: Place the speakers on a flat, level and stable surface.
Service Guide SW-2.1 850 Chapter 1. How to Handle Defective Returns 1.1 Overview Receiving Defective speaker form customers Verifying problems proceeding necessary tests Function NG Analyzing possible Function NG Function OK malfunction causes Deciding & proceeding the rectification methods Replace necessary...
Service Guide SW-2.1 850 1.2 Problems Item Problem Description 1.2.1 Satellite L/R channels no sound 1.2.2 Woofer channel no sound 1.2.3 Woofer no power Version 1.0 Page 6 of 16...
Service Guide SW-2.1 850 * Attention Please follow the numbered sequence marked within parenthesis given in individual Flow chat, in that this is the best-recommended sequence to rectify the problems. 1.2.1 Satellite L/R channels no sound Problem Satellite L/R channels no sound...
Service Guide SW-2.1 850 1.2.3 Woofer channel no sound Woofer channel no sound Problem Analyzer and Identify the Causes Defective Broken or short circuit Speaker cable dis-connect or IC102,IC103,C109, speaker damaged SUBWOOFER VR, Solutions Check solder points on Check and replace...
Service Guide SW-2.1 850 1.2.4 Woofer no power Woofer no power Problem Analyzer and Identify the Causes Defective Broken or short circuit Speaker cable dis-connect or D1~D8, speaker damaged Power SW, Fuse, Solutions Check solder points on Check and replace...
Service Guide SW-2.1 850 Chapter 3. Block Diagram FL OUT INPUT SCH SPEAKER FR OUT SPEAKER 2 CH INPUT VOLUME SUBWOOFER OUT TRANS3 SPEAKER FUSE POWER SW 250V/2A AC IN POWER SCH BASS Version 1.0 Page 11 of 16...
Service Guide SW-2.1 850 Chapter 6. Schematic Diagram M ai n PCB L IN R116 C or t r ol PCB 100K L OUT MASTERA 50KB R117 Subwoofer R IN SUBWOOFER 50KB 100K R OUT C125 C127 MASTERB 100uF/16V 100uF/16V...
Service Guide SW-2.1 850 Chapter 7. Important Notes 7.1 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.
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