Bose Companion 3 Series II Manuel d'entretien - Page 36

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SERVICE BULLETIN

Bulletin Part Number: 271885-B4

Product: Companion

Subject: Poor reliability on vendor part

Disposition: On all units that come in for repair, replace C7 with a Chemi-Con capacitor

Symptom: No Audio, Dead Unit or No Symptom

Reason: The capacitor made by Aishi is made using a low quality foil and poor quality etching

which is critical to the performance of an aluminum electrolytic capacitor. The

capacitor made by United Chemi-Con (UCC) is more dense and has more uniform

layering which makes the UCC capacitor more reliable.

Solution: All units that come in for repair, replace C7 using the part number listed in the table

below. For assembly/disassembly procedures, please refer to Service Manual

271885-SM (Companion

(Companion

Variant

Euro/Japan

Ref Des

FINS: 2784

Date: 11/07

3 Multimedia Speaker System

3 Series II Multimedia Speaker System).

33000 µF, EL, AL, 25V, 4T

39000 µF, EL, AL, 25V

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

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

3 Multimedia Speaker System) or 297700-SM

Description

Part Number

260693-3331E

260693-3931E

Good Part

Bad Part

United

Aishi

Chemi-Con