Bose Lifestyle PS 28 User Manual

1
PS18/28/35 Troubleshooting Guide
PROPRIETARY INFORMATION
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
BOSE
®
CORPORATION WHICH IS BEING FURNISHED ONLY FOR
THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT
BY AN AUTHORIZED SERVICE CENTER OR OWNER OF THE BOSE
PRODUCT, AND SHALL NOT BE REPRODUCED OR USED FOR ANY
OTHER PURPOSE.
Contents
Safety Information.............................................................................................................................2
Electrostatic Discharge Senstitive (ESDS) Device Handling ........................................................2
Specifications ....................................................................................................................................3
Theory of Operation .................................................................................................................... 4-21
Setting up a computer to issue TAP commands ..........................................................................22
Placing the Bass Module into TAP Mode ......................................................................................23
Figure 1. DIP switch Up/Down orientation ......................................................................................23
Equalizer Programming Method ....................................................................................................23
Scope Photos ............................................................................................................................ 24-25
Integrated Circuit Diagrams ..................................................................................................... 26-30

Bose Lifestyle PS 28 Specifications

General

Channels	5.1
Number of Speakers	5
Remote Control	Yes
Type	Home Theater System
Subwoofer	Yes

Summary

Safety Information

Electrostatic Discharge Sensitive (ESDS) Device Handling

Precautions for handling ESDS devices during repair or replacement.

Specifications

Mechanical Specifications

Physical dimensions and weight of the module and speakers.

Electrical Specifications

Electrical characteristics including drivers, power, impedance, distortion, noise, etc.

Theory of Operation

Switch-Mode Audio Tracking Power Supply

Introduction to the switch-mode audio tracking power supply technology.

DSP PCB Overview

Overview of the Digital Signal Processor board's functionality.

Amplifier PCB Description

Description of the amplifier board and its integrated circuit ICs.

Setting Up TAP Commands

Bass Module TAP Mode Operation

Placing the Bass Module into TAP Mode

Steps to put the bass module into TAP mode using DIP switches.

Verifying TAP Mode Communication

Procedure to confirm TAP mode communication with commands.

Equalizer Programming Method

Scope Photos

Integrated Circuit Diagrams

S/PDIF Receiver and Audio Codec Diagrams

Diagrams for S/PDIF receiver and audio codec components.

Amplifier and Comparator Diagrams

Diagrams for power amplifier and voltage comparator ICs.

DSP ADSP21065LKS Pin Functions

Pin functions and descriptions for the DSP ADSP21065LKS.