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CONTENTS
PROPRIETARY INFORMATION
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR
THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT
BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE
BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED
FOR ANY OTHER PURPOSE.
CAUTION: The Bose ® Lifestyle ® SA-2 & SA-3 amplifiers contain
no user-serviceable parts. To prevent warranty infractions,
refer servicing to warranty service stations or factory service.
SAFETY INFORMA
TION........................................................................\
..................................... ...... 2
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING .................................. 2
WARRANTY ........................................................................\
....................................................... ......... 2
ELECTRICAL SPECIFICA TIONS ........................................................................\
.............................. 3
MECHANICAL SPECIFICA TIONS ........................................................................\
............................. 4
PRODUCT DESCRIPTION ........................................................................\
....................................... 4
PART LIST NOTES ........................................................................\
........................................ ........... 4
PACKAGING PART LIST ........................................................................\
.................................... ...... 5
Figure 1. Lifestyle
®SA-2 Packaging View ........................................................................\
................. 5
PACKAGING PART LIST ........................................................................\
.................................... ...... 6
Figure 2. Lifestyle
® SA-3 Packaging View ........................................................................\
................. 6
MAIN PART LIST ........................................................................\
......................................... .............. 7
Figure 3. Lifestyle
® SA-2 Exploded View ........................................................................\
................... 7
MAIN PART LIST ........................................................................\
......................................... .............. 8
Figure 4. Lifestyle
®SA-3 Exploded View ........................................................................\
................... 8
ELECTRICAL PART LIST ........................................................................\
................................... ...... 9
SA-2 DISASSEMBLY PROCEDURES ........................................................................\
.................... 17
SA-3 DISASSEMBLY PROCEDURES ........................................................................\
.................... 19
TEST SET-UP .......................................................................\
............................................ ................ 22
TEST PROCEDURES ........................................................................\
............................................. 23
Lifestyle
® SA-2 & SA-3 Amplifier PCB Rev. 0 Topside Component and Etch Layout Diagram .......... 24
Lifestyle® SA-2 & SA-3 Amplifier PCB Rev. 0 SMD Etch and Component Layout Diagram .............. 25
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SAFETY INFORMATION
1.Parts that have special safety characteristics are identified by the \
symbol on schematics
or by special notes on the parts list. Use only replacement parts that h\
ave critical characteristics
recommended by the manufacturer.
2. Make leakage current or resistance measurements to determine that expos\
ed parts are
acceptably insulated from the supply circuit before returning the unit to the \
customer. Refer to
UL6500 clause 9.1.1. Use the following checks to perform these measureme\
nts:
A. Leakage Current Hot Check -With the unit completely reassembled, plug the AC line cord
directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use\
a leak-
age current tester or a metering system that complies with American National Standards Institute
(ANSI) C101.1 "Leakage Current for Appliances" and Underwriters Laboratories (UL) 6500. With
the unit AC switch first in the ON position and then in OFF position, measure fro\
m a known earth
ground (metal waterpipe, conduit, etc.) to all exposed metal parts of \
the unit (antennas, handle
bracket, metal cabinet, screwheads, metallic overlays, control shafts, e\
tc.), especially any
exposed metal parts that offer an electrical return path to the chassis. Any current measured
must not exceed 0.5 milliamp. Reverse the unit power cord plug in the ou\
tlet and repeat test.
ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTEN-
TIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE UNIT TO THE
CUSTOMER.
B. Insulation Resistance Test Cold Check -(1) Unplug the power supply and connect a jumper
wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3) Measure
the resistance with an ohmmeter between the jumpered AC plug and each exposed metallic
cabinet part on the unit. When the exposed metallic part has a return pa\
th to the chassis, the
reading should be between 1 and 5.2 Megohms. When there is no return pat\
h to the chassis, the
reading must be "infinite". If it is not within the limits specified, th\
ere is the possibility of a shock
hazard, and the unit must be repaired and rechecked before it is returned to the customer.
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS)
DEVICE HANDLING
This unit contains ESDS devices. We recommend the following precautions \
when repairing,
replacing or transporting ESDS devices:
Perform work at an electrically grounded work station.
Wear wrist straps that connect to the station or heel straps that conne\
ct to conductive
floor mats.
Avoid touching the leads or contacts of ESDS devices or PC boards even if properly
grounded. Handle boards by the edges only.
Transport or store ESDS devices in ESD protective bags, bins, or totes. D\
o not insert
unprotected devices into materials such as plastic, polystyrene foam, \
clear plastic bags,
bubble wrap or plastic trays.
The Bose ® Lifestyle ® SA-2 and SA-3 amplifiers are covered by a limited one year transferable\
warranty.
WARRANTY
