BOSE 264563 B7 Schematic

SERVICE BULLETIN

Bulletin Part Number: 264563-B7

Product: AV28 Media Center sold with Lifestyle® 28 Home Entertainment System and Lifestyle® 35 Home

Entertainment System.

Subject: 240V, 50Hz regions only: The AV28 Media Center 240V power packs may over heat and shut down.
This is not a safety issue. The protection circuit is tripping and shutting the power pack off.

Disposition: Replace the power pack with an improved power pack part number 256764-007 for units exhibiting
the symptom below.

Symptom: After a period of time the AV28 media center will shut down and then return to normal operation if
the power pack is unplugged and allowed to cool.

Reason: The AV28 power pack is heating up and tripping the thermal protection circuit within the power pack. If
allowed to cool, the power pack will operate again.

Solution: Replace the power pack with an improved power pack part number 256764-007.

FRACAS - 394
Date Issued: 02/2003

Bose Corporation; The Mountain, Framingham, Ma. 01701-9168

For Technical Assistance Call 1-800-233-4408

Service documentation available online at http://serviceops.bose.com