BOSE 260431 B1 Schematic

Bulletin Part Number:

Keyway

Pop rivets at
diagonal corners

260431-B1

Bose® Panaray® 402

Product:

Loose input connector.

Subject:

Check all units manufactured before July 1, 2002. This issue has been corrected in units manu-

Disposition:

®

Series II Loudspeaker

factured after July 1, 2002.

Symptom: Buzzing sound or intermittent/no audio output.

Reason: Buzzing may be caused by a loose input connector. Intermittent or no audio may be caused by a

loose input connector that has moved and stressed the wire connection.

Solution: Check the wire connection at the input connector and then secure the input connector to the
cabinet using pop rivets.

1. Remove the two center drivers to check the wiring at the two input
connectors. Ensure the wires are securely attached. Refer to the 402

Series II service manual part number 260431 for disassembly proce-

dures. http://serviceops.bose.com

2. Align the input connector on the cabinet with the connector’s
keyway at the twelve o’clock position.

3. Using the existing mounting holes in the input connector as a
template, with a #30 drill bit (.129-.133), drill two holes into the
cabinet at corners diagonal to each other.

4. Using a long nose pop rivet tool, secure the input connector to the
cabinet using a pop rivet .675 inches in length and a grip range of
.376-.500. (Bose part number 263826-007, Emhart part number
AD48H, www.emhart.com).

5. Repeat procedures 2-4 for the second input connector.

Date Issued: 9/2002

Bose Corporation

The Mountain

Framingham, MA 01701-9168

For Technical Assistance Call 1-800-233-4408

402 Loudspeaker Rear View

148940-rev01