The Bose Lifestyle V20 is a premium home theater system featuring a media center, Acoustimass module, and jewel cube speakers. This service manual provides detailed information for qualified technicians regarding system overview, technical specifications, disassembly procedures, troubleshooting, circuit diagrams, parts lists, and safety precautions. Use this manual only if you are trained in electronics repair.
The Bose Lifestyle V20 system consists of the ADAPTiQ-enabled media center, an Acoustimass bass module, five jewel cube speakers, and a universal remote control. Key components for service: Main PCB, power supply unit, optical drive, front display panel, and connectivity ports.
| Component | Description |
|---|---|
| Media Center | Central processing unit with amplifier, tuner, and input/output ports |
| Acoustimass Module | Powered bass unit with proprietary driver technology |
| Jewel Cube Speakers | Five satellite speakers for surround sound |
| Universal Remote | RF remote control with LCD screen |
| Power Supply Unit (PSU) | Internal switching power supply |
| Main PCB | Motherboard with DSP, audio processing, and control circuits |
| Front Panel Assembly | Display, buttons, and IR sensor |
| Optical Drive | Slot-loading CD/DVD mechanism |
Before servicing, disconnect AC power. Allow capacitors to discharge.
WARNING! Only qualified personnel should perform service. Incorrect repair can cause electric shock, fire, or further damage.
Procedure for accessing internal components of the media center.
CAUTION! Label all connectors before disconnection. Handle ribbon cables by the ends, not the wires.
Refer to separate schematic package (drawings LSV20-xxx). Key diagrams include:
Note: Schematics are proprietary to Bose. Obtain the latest revision from Bose technical support.
| Symptom | Possible Cause | Diagnostic Step |
|---|---|---|
| No Power (No lights) | Faulty PSU, Blown fuse, Faulty main PCB | Check AC input. Measure +5VSB on PSU. Check fuse F101 on main board. |
| No Audio Output | Faulty amp section, DSP failure, Speaker connection | Inject test tone at pre-out. Check speaker connector continuity. Verify DSP power rails. |
| No Video/HDMI Output | HDMI board failure, Firmware corruption | Check HDMI board voltages. Reflash main firmware via service port. |
| Disc Not Reading | Dirty laser lens, Faulty optical drive, Ribbon cable | Clean lens with approved swab. Check drive motor operation. Reseat drive data cable. |
| Remote Not Working | Dead batteries, Faulty RF receiver, Front panel board | Test remote with another Bose system. Check RF receiver module (U12) on main board. |
Key replaceable parts (Partial List). Use exact Bose part numbers for ordering.
| Part Number | Description | Qty per System |
|---|---|---|
| 154475 | Media Center Main PCB Assembly | 1 |
| 154476 | Power Supply Unit (PSU) | 1 |
| 154477 | Front Panel Assembly with Display | 1 |
| 154478 | Slot-Load Optical Drive Mechanism | 1 |
| 154479 | Jewel Cube Speaker (Single) | 5 |
| 154480 | Acoustimass Module Driver | 1 |
| 154481 | Universal Remote Control | 1 |
| 154482 | Power Cord (North America) | 1 |
Exploded Views: Refer to drawings LSV20-EXP-01 (Media Center) and LSV20-EXP-02 (Acoustimass Module).
Service procedures for firmware updates and diagnostics.
Warning: Interrupting a firmware update can brick the unit. Ensure stable power during the process.
After repair, reassemble in reverse order of disassembly. Perform full functional test.
Final Check: Ensure no loose parts or foreign objects are inside the chassis.
This product complies with relevant regulations. Modifications not authorized by Bose may void compliance and warranty.
Copyright © Bose Corporation. All rights reserved. Bose, Lifestyle, V20, Acoustimass, ADAPTiQ, and Jewel Cube are trademarks of Bose Corporation.
For technical support, service bulletins, and genuine Bose parts:
Disclaimer: This manual is for use by qualified technicians only. Bose Corporation is not responsible for damage resulting from unauthorized service.