BOSE 264563 B1 Schematic

Bulletin Part Number:

264563-B1

Product:

Bose

Subject:

Audio drop outs.

Disposition:

Perform on units returned exhibiting symptom (units built before 04/01/02).

®

Lifestyle® AV28 Media Center.

Symptom: Audio drop outs.

Reason: Clocking issue.

Solution: Change R512 and R707 from a 100 Ohm resistor to a 22 Ohm, 0603, .1W, 5% resistor part number

199403-220.

Refer to the layout on the back of this page for the component locations.

The software in the Media Center must be at least 01.01 revision software or later.

The software revision can be checked using the buttons on the keypad. Press and hold "Store" and then "Enter" to
view the software revision. The display will show something similar to "SW C:01.01.AS". For this display the software
revision code is 01.01. The first two digits indicate a major software revision and the second two digits indicate a
minor software revision. Major revision 1, minor revision 1.
Note: If the software revision displayed does not follow the scheme mentioned above, it is possible that the Media
Center has an early software revision and needs to be updated. If you are not sure, contact Bose Service.

Example:

01.02 would be a later revision software than 01.01.

02.00 would be a later revision software than 01.01.

Contact Bose Service at

1-800-233-4408 to find out what the latest revision of the software is and to

obtain a software update disc with instructions.

Reference

Designator

R512, 707 100 OHM ,0603,.1W,5% 199403-101 22 OHMS, 0603, .1W, 5% 199403-220

ECN: 30727
FRACAS: 347
Date Issued: 4/2002

From Description From Part

Number

http://serviceops.bose.com

Bose Corporation

The Mountain

Framingham, MA 01701-9168

For Technical Assistance Call 1-800-233-4408

To Description To Part

Number

Main PCB 254135 Top Side