SERVICE BULLETIN
Bulletin Part Number: 271885-B4
Product: Companion® 3 Multimedia Speaker System
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® 3 Multimedia Speaker System) or 297700-SM (Companion® 3 Series II Multimedia Speaker System).
Variant |
Description |
Part Number |
US |
33000 µF, EL, AL, 25V, 4T |
260693-3331E |
Euro/Japan |
39000 µF, EL, AL, 25V |
260693-3931E |
Ref Des
C7
Good Part |
Bad Part |
United Aishi
Chemi-Con
FINS: 2784
Date: 11/07
Bose Corporation; The Mountain, Framingham, Ma. 01701-9168
Service documentation available online at http://serviceops.bose.com
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