Bose Lifestyle 50 Service Manual

The Bose Lifestyle 50 is a premium home theater system featuring a media center, Acoustimass module, and jewel cube speakers. This service manual provides detailed technical information for qualified service personnel, including system overview, specifications, disassembly procedures, troubleshooting, circuit diagrams, and replacement parts. Below are key sections for safety, system components, technical specifications, service procedures, and troubleshooting.

1. System Overview 2. Safety Precautions 3. Technical Specifications 4. Component Identification 5. Disassembly Procedures 6. Circuit Diagrams 7. Troubleshooting Guide 8. Replacement Parts List 9. Alignment & Calibration 10. Regulatory Compliance 11. Contact Information

System Overview

Key components: Lifestyle 50 Media Center (Model SA-3), Acoustimass Module (Model AM-5), Jewel Cube Speakers (5), Remote Control (RC-1), and necessary cables.

Component	Description
Media Center (SA-3)	Main control unit with amplifier, tuner, and input/output connections
Acoustimass Module (AM-5)	Bass module for low-frequency reproduction
Jewel Cube Speakers	Five satellite speakers for surround sound
Remote Control (RC-1)	Infrared remote for system operation
Power Cords	AC power connections for media center and bass module
Audio/Video Cables	RCA, optical, and speaker connection cables
AC input connector	For power connection to media center
Speaker terminals	For connecting jewel cube speakers
Input ports	For DVD, CD, auxiliary, and other source connections
Output ports	For subwoofer and additional zone connections

Safety Precautions

Before servicing, review all safety warnings and procedures.

Disconnect AC power before opening any enclosure.
Use proper electrostatic discharge (ESD) protection when handling circuit boards.
Ensure work area is clean, dry, and well-lit.
Use only specified replacement parts.

WARNING! High voltages are present inside the media center and Acoustimass module. Only qualified personnel should perform service. Ensure all connections are secure before applying power.

Technical Specifications

Power Output: 200 watts total system power.
Frequency Response: 35Hz - 20kHz (±3dB).
Inputs: DVD, CD, Aux, Tuner, Optical Digital.
Outputs: Subwoofer, Zone 2, Headphone.
Speaker Impedance: 4-8 ohms per channel.
Power Requirements: 120V AC, 60Hz, 2.5A.
Dimensions (Media Center): 16.5" W × 3.5" H × 12.5" D.
Weight: Media Center: 12 lbs; Acoustimass Module: 25 lbs.
Operating Temperature: 41°F to 95°F (5°C to 35°C).

Component Identification

Media Center Front Panel: POWER, INPUT SELECT, VOLUME, MUTE, DISPLAY. Rear Panel: AC INPUT, SPEAKER TERMINALS, INPUT/OUTPUT JACKS.

Remote Control: POWER, Numeric buttons, INPUT SELECT, VOLUME, MUTE, MENU, SETUP, Navigation arrows.

Internal Boards: Main PCB, Power Supply Board, Display Board, Input/Output Board. Acoustimass Module: Amplifier Board, Driver Assembly. Jewel Cube Speakers: Driver, Enclosure, Mounting Bracket.

Disassembly Procedures

Media Center: Remove top cover, front panel, and internal boards.

Disconnect AC power and all cables.
Remove screws from rear panel and sides.
Lift top cover carefully.
Disconnect internal ribbon cables and connectors.
Remove PCB mounting screws to access boards.

Tip: Label all cables and connectors during disassembly for proper reassembly.

Circuit Diagrams

Includes block diagrams, schematic diagrams, and PCB layouts.

System Block Diagram: Shows signal flow between components.
Power Supply Schematic: Details AC input, rectification, and regulation.
Amplifier Circuit: Output stages and protection circuits.
Control Circuit: Microprocessor and interface circuits.
Display Circuit: Front panel display driver.

Note: Refer to separate fold-out diagrams included with manual.

Troubleshooting Guide

Symptom	Possible Cause	Corrective Action
No power	Power cord, fuse, power supply	Check AC input; test fuse F1; verify power supply output voltages.
No audio output	Speaker connections, amplifier	Verify speaker wiring; test amplifier IC201; check input signals.
Distorted sound	Overload, faulty components	Check speaker impedance; test output transistors Q101-Q104.
Remote not working	Batteries, IR sensor	Replace batteries; test IR receiver IC301; check remote operation.
Display issues	Display board, connections	Check ribbon cable CN401; test display driver IC501.

Reset Procedure: Unplug unit for 2 minutes, then reconnect power.

Replacement Parts List

Genuine Bose replacement parts must be used for proper operation and safety.

Part Number	Description	Qty
143456	Main PCB Assembly	1
143457	Power Supply Board	1
143458	Display Board	1
143459	IR Sensor	1
143460	Power Transformer	1
143461	Fuse (2A, 250V)	2
143462	Jewel Cube Speaker	5
143463	Acoustimass Driver	1
143464	Remote Control (RC-1)	1

Alignment & Calibration

System calibration procedures for optimal performance.

Speaker Calibration: Use built-in test tones and SPL meter.
Balance Adjustment: Adjust channel levels for equal output.
Bass Management: Set crossover frequency to 120Hz.
System Reset: Restore factory default settings.

CAUTION! Use specified test equipment and follow procedures exactly.

Regulatory Compliance

FCC Part 15: Class B digital device compliant. UL Listed: Meets safety standards. CE Mark: European compliance. Copyright © 2006 Bose Corporation. All rights reserved. Bose and Lifestyle are registered trademarks of Bose Corporation. For technical support, contact authorized Bose service centers only.

Contact Information

Bose Corporation Service Division: 1-800-999-2673 (US and Canada). International: +1-508-766-1099. Website: www.bose.com/service. Authorized Service Centers: Listed on Bose website. Hours: Monday-Friday, 9:00 AM - 9:00 PM EST.

Note: This manual is for qualified service personnel only. Unauthorized service voids warranty.