BOSE LIFESTYLE SA-2, LIFESTYLE SA-3 Schematic
CONTENTS
SAFETY INFORMATION ...................................................................................................................2
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING .................................. 2
WARRANTY........................................................................................................................................2
ELECTRICAL SPECIFICATIONS...................................................................................................... 3
MECHANICAL SPECIFICATIONS.....................................................................................................4
PRODUCT DESCRIPTION ...............................................................................................................4
PART LIST NOTES ........................................................................................................................... 4
PACKAGING PART LIST .................................................................................................................. 5
Figure 1. Lifestyle
PACKAGING PART LIST .................................................................................................................. 6
Figure 2. Lifestyle
MAIN PART LIST ...............................................................................................................................7
Figure 3. Lifestyle
MAIN PART LIST ...............................................................................................................................8
Figure 4. Lifestyle
ELECTRICAL PART LIST .................................................................................................................9
SA-2 DISASSEMBLY PROCEDURES ............................................................................................ 17
SA-3 DISASSEMBLY PROCEDURES ............................................................................................ 19
TEST SET-UP ................................................................................................................................... 22
TEST PROCEDURES ..................................................................................................................... 23
Lifestyle
Lifestyle
®
SA-2 & SA-3 Amplifier PCB Rev. 0 Topside Component and Etch Layout Diagram..........24
®
SA-2 & SA-3 Amplifier PCB Rev. 0 SMD Etch and Component Layout Diagram ..............25
®
SA-2 Packaging View ......................................................................................... 5
®
SA-3 Packaging View .........................................................................................6
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SA-2 Exploded View ...........................................................................................7
®
SA-3 Exploded View ........................................................................................... 8
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.
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.
1
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 have critical characteristics
recommended by the manufacturer.
2. Make leakage current or resistance measurements to determine that exposed 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 measurements:
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 leakage 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 from 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, etc.), 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 outlet and repeat test.
ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL 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 path to the chassis, the
reading should be between 1 and 5.2 Megohms. When there is no return path to the chassis, the
reading must be "infinite". If it is not within the limits specified, there 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 connect 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. Do not insert
unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags,
bubble wrap or plastic trays.
WARRANTY
The Bose® Lifestyle® SA-2 and SA-3 amplifiers are covered by a limited one year transferable warranty.
2
ELECTRICAL SPECIFICATIONS
Voltage Variations: US: 120 Vrms
International: 220-240 Vrms
Maximum Power: SA-2: 40 Watts into 6 Ohms @ <0.1% THD
20 Hz to 10kHz
SA-3: 100 Watts into 6 Ohms @ < 0.2%THD
20 Hz to 10 kHz
Frequency Response: 20 Hz - 20 kHz,+/- 0.5 dB (at full volume)
Dynamic Equalization:
25
<40 dB SPL
20
R
E
S
P
O
N
S
E
:
:
D
B
50 dB SPL
15
60 dB SPL
10
70 dB SPL
80 dB SPL
5
0
-5
1E 1 1E 2 1E 3
90 dB SPL
FREQUENCY--HERTZ
Voltage Gain (at 1 kHz): SA-2: 34.2 dB +/- 0.5 dB
SA-3: 38.2 dB +/- 0.5 dB
Input Impedance at (at 1 kHz): 10 k +/- 1 Ohms
Signal to Noise Ratio: 92 dB
Input Sensitivity: 0.3 Vrms at full volume produces rated
output power
Compressor: Range: 18 dB (minimum)
Attack Time: 1 dB/ 700uS
Release Time: 1 dB/10 mS
Distortion: <2%THD @100 Hz, 18 dB into compression
Turn-On Delay (to unmute): 1 second maximum at initial turn-on
0.2 second maximum from standby
Volume Control Range: 0 to -80 dB in 1 dB steps
Output DC offset: < 20 mVdc
Channel Balance: +/- 0.5 dB
Output Short-Curcuit Duration: Infinite (with no damage)
Standby Power Consumption: < 1 Watts (real power) at rated line voltage
3
MECHANICAL SPECIFICATIONS
Quiescent ON Power Consumption: SA-2: < 10 Watts
SA-3: < 15 Watts
Maximum Power Consumption: SA-2: < 220 Watts
SA-3: < 400 Watts
Size: SA-2: 3½”H x 14 1/8”W x 5½”D
(8.9cm x 35.9cm x 14cm)
SA-3: 4¼”H x 14 1/8”W x 5½”D
(11.4cm x 35.9cm x 14cm)
Weight; shipping: SA-2: 7.6 lbs. (3.4 kg)
SA-3: 11.1 lbs. (5 kg)
Enclosure Material: Housing: Die cast aluminum (A360)
Bottom: 20 Ga. steel plate
Finish: Textured black powdercoat
Controls: Power switch (International version only)
Voltage select switch (Dual Voltage version
only)
PRODUCT DESCRIPTION
The SA-2 Amplifier is a 2 x 40W stereo audio amplifier intended to power Bose® 161™, 191, 201®,
or AM-3 indoor “zone 2” loudspeakers. It is the next generation version of SA-1, updated to work
with the next generation media centers. It recognizes and responds to smart speaker II protocol
commands. The SA-3 Amplifier is a 2 x 100W stereo audio amplifier intended to power Bose high
SPL passive loudspeakers which can be used in second zone applications, specifically, 251
FS-51 (outdoor), AM-5
tional features: local audio source input and mono/stereo switch. The SA-3 recognizes and responds to smart speaker I (CD-5, CD-20, MRI) or II (AV18 and AV48) protocol commands.
®
or 301® (indoor). SA-3 is the higher power version of SA-2, with two addi-
®
or
PART LIST NOTES
1. This part is not normally available from Customer Service. Approval from the Field Service
Manager is required before ordering.
2. The individual parts located on the PCBs are listed in the Electrical Part List.
3. This part is critical for safety purposes. Failure to use a substitute replacement with the
same safety characteristics as the recommended replacement part might create shock, fire
and/or other hazards.
4
PACKAGING PART LIST
Reference
Designator
1 8 TO 9 PIN DIN ADAPTER 273263
2 BAG, POLY, 14 3/8X9 7/8X2 MIL 103351
3 REGISTRATION & WARRANTY CARD 262933
4 SHEET, SAFETY 275072
5 OWNERS MANUAL, 3 LANGUAGE 275071
6 PACKING, INSERT 275424
7 CABLE, DIN-9, 20FT 272902-220
8 LINE CORD, DETACH, BLK
US/DUAL VOLTAGE
220-240V, EURO
240V, UK
240V, AUS
9 PACKING, END CAP, EPS 275423
10 CARTON, RSC 275422
-- BAG, POLY, 12X20X4 MIL 197405
1
Description Part Number Note
198603-001
148203
134725
134726
2
3
4
3
5
6
7
9
8
9
10
Figure 1. Lifestyle® SA-2 Packaging View
5
PACKAGING PART LIST
Reference
Designator
1 8 TO 9 PIN DIN ADAPTER 273263
2 BAG, POLY, 14 3/8X9 7/8X2 MIL 103351
3 REGISTRATION & WARRANTY CARD 262933
4 SHEET, SAFETY 275072
5 OWNERS MANUAL, 3 LANGUAGE 275071
6 PACKING, INSERT 275424
7 CABLE, DIN-9, 20FT 272902-220
8 LINE CORD, DETACH, BLK
US/DUAL VOLTAGE
220-240V, EURO
240V, UK
240V, AUS
9 PACKING, END CAP, EPS 275423
10 CARTON, RSC 276289
-- BAG, POLY, 12X20X4 MIL 197405
Description Part Number Note
198603-001
148203
134725
134726
3
1
7
8
9
4
5
2
3
6
9
10
Figure 2. Lifestyle® SA- 3 Packaging View
6
MAIN PART LIST
Reference
Designator
1 CONNECTOR, PLUG-IN, 4 PIN 272953-04 1
2 CONNECTOR, PLUG-IN, 2 PIN 272953-02 1
3 SCREW, HILO, 4-16x.375, PAN, XREC 181621-06 1
4 HOUSING, AMPLIFIER 271724-02 1 1
5 FOOT, RUBBER, PRESS FIT 197418 4
6 TAPE, PAD, INSULATING 328907-0010
7 PCB ASSY, US/CANADA, 120V 288296-103S or 323980-011S 1
PCB ASSY, EURO, UK, AUS, 220/240V 303198-203S or 323981-012S
8 PAD, THERMAL, AMP 320002-002 2
9
10 TRANSFORMER, 120V 271727 1 3
TRANSFORMER, 230V 271790
11 PANEL, BOTTOM 271725-001 1
12 SCREW , TT, 8-32X0.5, PAN, XREC/SQ 255191-08 13
HEATSINK BAR 319884-001
Description Part Number Qty. Note
1
2
1
2
3
4
5
10
6
7
8
9
12
11
Figure 3. Lifestyle® SA-2 Exploded View
7
MAIN PART LIST
Reference
Designator
1 CONNECTOR, PLUG-IN, 4 PIN 272953-04 1
2 CONNECTOR, PLUG-IN, 2 PIN 272953-02 1
3 SCREW , HILO, 4-16x.375, PAN, XREC 181621-06 2
4 HOUSING, AMPLIFIER 271724-03 1 1
5 FOOT, RUBBER, PRESS FIT 197418 4
6 TAPE, PAD, INSULATING 328907-0020
7 PCB ASSY, US/CANADA, 120V 288286-103S or 323982-011S
PCB ASSY, EURO, UK, AUS, 220/240V 303199-203S or 323983-012S
8 PAD, THERMAL, AMP 320002-001 1
9
10 TRANSFORMER, 120V 271728 1 3
TRANSFORMER, 230V 271792
11 HOUSING, BOTTOM 271726-001 1
12 SCREW , TT, 8-32X0.5, PAN, XREC/SQ 255191-08 16
HEAT SINK BAR
Description Part Number Qty. Note
1
1 2
319832-001
1
2
3
4
6
7
8
9
10
12
11
5
Figure 4. Lifestyle® SA-3 Exploded View
8
ELECTRICAL PART LIST
Resistors
Reference
Designator
RT1 THERMISTOR, 0805, 10K, 5% 197229 SA-3 Only
RT2 THERMISTOR, 0805, 10K, 5% 197229
RT3 THERMISTOR, 0805, 10K, 5% 197229
R1 100 OHM, 0603, .1W, 1% 191465-1000
R2 10K, 0603, .1W, 1% 191465-1002
R3 10K, 0603, .1W, 1% 191465-1002
R4 100K, 0603, .1W, 1% 191465-1003
R5 4.02K, 0603, .1W, 1% 191465-4021
R6 4.02K, 0603, .1W, 1% 191465-4021 SA-3 Only
R7 100K, 0603, .1W, 1% 191465-1003 SA-3 Only
R8 JUMPER, 0805 133627
R9 499 OHM, 0603, .1W, 1% 191465-4990
220 OHM, 2512, 1W, 5% 181895-2200 120V Only R10
470 OHM, 2512, 1W, 5% 181895-4700 230V Only
R11 10K, 0603, .1W, 1% 191465-1002
R12 200 OHM, 0603, .1W, 1% 191465-2000
R13 432 OHM, 0603, .1W, 1% 191465-4320
R14 2.0K, 0603, .1W, 1% 191465-2001
R15 10K, 0603, .1W, 1% 191465-1002
R16 10K, 0603, .1W, 1% 191465-1002
R17 2.0K, 0603, .1W, 1% 191465-2001
R18 100K, 0603, .1W, 1% 191465-1003
R19 100K, 0603, .1W, 1% 191465-1003
R20 1.0K, 0603, .1W, 1% 191465-1001
R21 1.0K, 0603, .1W, 1% 191465-1001 SA-3 Only
R22 10K, 0603, .1W, 1% 191465-1002
R23 100 OHM, 0603, .1W, 1% 191465-1000
R24 100 OHM, 0603, .1W, 1% 191465-1000
R25 10K, 0603, .1W, 1% 191465-1002
R26 100 OHM, 0603, .1W, 1% 191465-1000
R27 100 OHM, 0603, .1W, 1% 191465-1000
R28 100K, 0603, .1W, 1% 191465-1003
R29 100K, 0603, .1W, 1% 191465-1003
R30 100K, ARRAY, SMT, 4 POS, 5% 186433-1044
R31 20.0K, 0603, .1W, 1% 191465-2002
R32 100K, 0603, .1W, 1% 191465-1003
R33 200K, 0603, .1W, 1% 191465-2003
R35 13.3K, 0603, .1W, 1% 191465-1332
R36 1.0K, 0603, .1W, 1% 191465-1001
R37 4.99K, 0603, .1W, 1% 191465-4991
R38 4.99K, 0603, .1W, 1% 191465-4991
R39 7.5K, 0603, .1W, 1% 191465-7501
R40 49.9K, 0603, .1W, 1% 191465-4992
R41 22 OHMS, 0603, .1W, 5% 199403-220
R42 20.0K, 0603, .1W, 1% 191465-2002
R44 10K, 0603, .1W, 1% 191465-1002
R45 10K, 0603, .1W, 1% 191465-1002
R47 100K, 0603, .1W, 1% 191465-1003
R48 20.0K, 0603, .1W, 1% 191465-2002
R49 330 OHM, 2512, 1W, 5% 181895-3300
R50 100K, 0603, .1W, 1% 191465-1003
R51 10K, 0603, .1W, 1% 191465-1002
R52 100K, 0603, .1W, 1% 191465-1003
R53 2.49K, 0603, .1W, 1% 191465-2491
Description Part Number Note
9
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