BOSE 271721-B1 Schematic

SERVICE BULLETIN

Bulletin Part Number: 271721-B1
Product: Bose

®

Lifestyle

®

SA-2 Amplifier - 230-240V (EURO, ASIA PAC)

Subject: 230-240V SA-2 amps not turning on
Disposition: Perform this procedure on units manufactured before 3/26/07.
Symptom: No symptom or customer complaint of SA-2 amp turning on intermittently or not at all.
Reason: C11 could be over stressed and has failed.
Solution: Check the value of C1 1 on all unit s manufactured before 3/26/07. If C11 is a blue capacitor marked

as 250V or a gray capacitor marked as 275V replace it with part number 306320-154A.
The date of manufacture is the four underlined numbers in the serial number. YDDD - 3/26/07 = 7085
Note: 306320-154A is

Arcontronic P/N R47N315000A1K (440V AC, 0.15uF, 10%, Film)
or
Vishay P/N MKP1841415635K (400V AC, 0.15uF, 10%, Flim)

Date Issued: 04/05/07
FRACAS: 543

Suspect Capacitors

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

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