BOSE 263851R2 Schematic
FreeSpace® 3 Series II
Loudspeaker System
FS3B Acoustimass® Bass Module FS3F Satellite Speaker
©2008 Bose Corporation
Service Manual
Part Number 263851 Rev . 02
CONTENTS
Warranty Information.........................................................................................................................1
Specifications....................................................................................................................................2
Product Description .........................................................................................................................2
Disassembly Procedures .................................................................................................................3
FreeSpace® 3B Acoustimass® Bass Module Procedures...........................................................3
FreeSpace 3F Satellite Procedures ...............................................................................................3
Test Setup Procedures ................................................................................................................ 4-5
Figure 1. 6 Ohm Mono Test Setup Setting ........................................................................................4
Figure 2. Stereo Test Setup Setting ..................................................................................................4
Figure 3. Factory Default Setting ......................................................................................................5
Figure 4. 70/100 Volt Test Setup Setting ...........................................................................................5
Test Procedures ...............................................................................................................................6
Main Part List, FreeSpace 3 Series II Acoustimass® Module Loudspeaker ..............................7
Figure 5. FreeSp ace Series II Acoustimass Loudspeaker Exploded View ........................................7
Electrical Part List, FreeSpace 3B Crossover PCB ...................................................................... 8
Main Part List, FreeSpace 3F Satellite Speaker ............................................................................ 9
Figure 6. FreeSp ace 3F Satellite S peaker Exploded View ................................................................9
Packing List, FreeSpace 3 Series II Acoustimass® Module Loudspeaker ...............................10
Figure 7. FreeSp ace Series II Acoustimass Loudspeaker Packaging View ....................................10
Packing List, FreeSpace 3 Omni Loudspeaker Bracket.............................................................11
Figure 8. FreeSp ace 3 Omni Speaker Bracket Packaging View .....................................................11
Packing List, FreeSpace 3F Satellite Speaker ............................................................................ 12
Figure 9. FreeSpace 3F Satellite Speaker Packaging View ............................................................12
Figure 10. FreeSpace 3B Crossover PCB Schematic Diagram.....................................................13
Service Manual Revision History .................................................................................................14
CAUTION: The Bose® FreeSpace Series II Loudspeaker System
contains no user-serviceable parts. To prevent warranty infractions,
refer servicing to warranty service stations or factory service.
WARRANTY INFORMATION
The Bose FreeSp ace 3 Series II Acoustimass Module Loudspeaker and Free Sp ace Model 3F
Satellite Loudspeakers are covered by a 5-year transferable limited warranty .
PROPRIET ARY INFORMA TION
THIS DOCUMENT CONT AINS PROPRIET ARY INFORMA TION OF
BOSE CORPORA TION 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.
2
SPECIFICATIONS
System Components: Satellite: (1) 2 1/4" T widdlerTM in each FS3F satellite
Bass Module: (1) 5 1/4" Woofer in each bass module
External Dimensions: Satellite: 6.2 in. x 4.4 in. (157mm dia x 1 12mm depth)
Bass Module: 15.04 in. x 7.87 in. (382mm dia x 200 mm
depth)
Weight: Single Satellite: 1.65 lbs. (0.75 kg)
Bass Module: 15.4 lbs. (7 kg)
Packed System: 17.6 lbs. (8 kg)
Electrical Crossover: Frequency: 200 Hz @ 6 dB/octave
Impedance: 4 Ohms nominal 130 Ohms @ 70V, 32W, from 70 Hz - 15 kHz
250 Ohms @100V, 32W, from 70 Hz - 15 kHz
Power Handling: 100 Watts continuous per IEC-268-5, 96 hours.
Recommended amplifier / Max 100 Watts.
Filter: 24 dB/oct Butterworth,
Hi-pass 50 Hz
Lo-pass 250 Hz
Sensitivity: Satellites: >73 dB SPL, free field, per IEC-268-5
(1 W, 1m Free Space) (for octave-band centered at 400 Hz)
Bass Module: >74 dB SPL, free field, per IEC-268-5
(for octave-band centered at 100 Hz)
Flux Leakage: 2.0 Gauss max. @ 30mm from any surface of
(satellites) the satellite
System Protection: Polyswitch
PRODUCT DESCRIPTION
The Bose® FreeSpace® 3 Series II Acoustimass® Module Loudspeaker and the Bose FreeSp ace
3F satellite speakers are passive flush-mount ceiling speakers. Typical application is in retail,
restaurant, hospitality and other commercial applications. The Bose Free Space 3F satellite
speaker is a flush-mount variant of the current surface-mount Free Space 3 satellite.
3
DISASSEMBLY PROCEDURES
FreeSpace® 3B Acoustimass® Bass Module
Procedures
Note: Refer to figure 5 for the following
procedures:
1. Grille and Logo Removal
1.1 Use force to pull out the logo (18), then
gently pull the grille (17) away from the baffle
(1). Be careful not to mark the surface of the
grille or the enclosure.
2. Woofer Assembly Removal
2.1 Use a cross-head screwdriver to remove
the 10 screws (10) that secure the rear
cover (3) to the enclosure (2). Gently turn
over the rear cover (3) to allow access to the
woofer assembly (5).
2.2 Remove 4 screws (9) of the woofer
assembly and 3 screws of the transformer
access cover (6). Lift out the transformer
access cover with the transformer (7)
attached to allow access to the crossover
PCB (19).
FreeSpace® 3F Satellite Procedures
Note: Refer to figure 6 for the following
procedures.
1. Grille Assembly Removal
1.1 Gently pull the grille assembly (4) away
from the enclosure (8). Be careful not to
mark the surface of the grille or the enclosure.
2. T widdlerTM Assembly Removal
2.1 Perform procedure 1.
2.2 Using a cross-head screwdriver, remove
the four screws (1) that secure the baffle
plate (9) to the enclosure (8).
2.3 Unplug the two wires from the driver (2).
Re-assembly Note: Be sure to observe
polarity when reconnecting the wires. Red
for "+" and black for "-".
2.3 Make a note of the wiring configuration
and unplug the four wires of the woofer
assembly from the crossover PCB.
2.4 Lift the woofer assembly out of the
enclosure.
3. Transformer Kit Removal
3.1 Perform step 2.1.
3.2 Remove the 3 screws of the transformer
access cover (6) and lift out the transformer
kit (6, 7, 8) from the mounting hole.
3.3 Make a note of the wiring configuration
and unplug all the wires from the transformer.
Re-assembly Note: Make sure the gap for
the transformer wires through the enclosure
is airtight.
4
TEST SETUP PROCEDURES
Mono Direct: To bypass the transformer and prepare the loudspeaker for 6 Ohm use and mono
sound input, remove the two jumpers from the transformer settings on the front of the loudspeakers. Leave the CH1 and CH2 jumpers on the back of the loudspeaker as they are.
Figure 1. 6 Ohm Mono Test Setup Setting
Stereo Direct: To bypass the transformer and prepare the loudspeaker for 6 Ohm use and
stereo sound input, remove all the jumpers.
Figure 2. Stereo Test Setup Setting
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