BOSE FREESPACE 3 Schematic

FreeSpace® 3

Loudspeaker System

©2006 Bose Corporation

Service Manual

Part Number 256589-SM Rev. 01

CONTENTS

Contents ............................................................................................................................................2

Warranty Information........................................................................................................................2

Specifications ....................................................................................................................................3

Disassembly/Assembly Procedures ........................................................................................... 4-6

Figure 1. FreeSpace® 3 Disassembly View ..................................................................................... 6

Test Setup Procedures ................................................................................................................. 7-8

Figure 2. Test Setup Diagrams .......................................................................................................... 7

Main Part List.....................................................................................................................................9

Figure 3. FreeSpace 3 Bass Module Exploded View ........................................................................9

Crossover Electrical Part List ........................................................................................................ 10

Crossover Mechanical Part List..................................................................................................... 11

Figure 4. Crossover Assembly View ...............................................................................................11

Packaging Part List, Refer to Figure 5 ..........................................................................................12

Figure 5. Packaging Exploded View ................................................................................................ 12

Figure 6. Crossover Assembly Schematic Diagram ....................................................................... 13

Service Manual Revision History ................................................................................................... 14

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

user-serviceable parts. To prevent warranty infractions, refer servicing to

warranty service stations or factory service.

®

FreeSpace 3 Loudspeaker System contains no

WARRANTY INFORMATION

The Bose FreeSpace 3 Loudspeaker System is covered by a transferable 5-year
limited warranty.

2

SPECIFICATIONS

System Components:

Dimensions:

Weight:

Electrical Crossover:
Impedance:
Power Handling:
Compatibility:
Sensitivity (1W, 1m):

Flux leakage (cubes):
System Protection:

Satellite: 1 21/4” Twiddler™ in Satellite Speaker
Bass Module: 1 51/4” Woofer

Satellite: 3.1” x 3.1” x 4.1 in (7.9 x 7. 9 x 10.2cm)
Bass Module: 14 x 7.5 x 12.6 in (35.5 x 19 x 32.0 cm)

Single Satellite: 1.1 lbs. (.5 kg)
Bass Module: 13.7 lbs. (6.2 kg)
Packed System: 16 lbs. (7.3 kg)

Frequency: 200 Hz @ 6 dB/octave
6 Ohm nominal 4.8 Ohm minimum from 20 Hz to 20 kHz
50 Watts (17.3 Vrms) Continuous per IEC-268-5
Receivers: 10 to 100 Watts per channel
Satellites: >

(for octave-band centered at 400 Hz)
Bass Module: >
(for octave-band centered at 100 Hz)

2.0 Gauss max. @ 30 mm from any surface of the satellite
PTC, resistor and lamp

73 dB SPL, free field, per IEC-268-5
74 dB SPL, free field, per IEC-268-5

3

DISASSEMBLY/ASSEMBLY PROCEDURES

Note: Refer to Figure 1 for the following

procedures.

1. Terminal Plate Removal

1.1 Remove the six screws (3) securing the

terminal plate (2) to the bass module (1).

1.2 Gently lift and rotate the terminal plate
(2) so you can access the harness. Untwist
the service loop in the harness so the
crossover assembly (13) can be accessed.

2. Terminal Plate Replacement

2.1 Place the terminal plate (2) onto the

bass module. Twist the wire harness into a
service loop.

2.2 Secure the terminal plate (2) to the
bass module using the six screws (3).

6. Transformer Removal

6.1 Preform procedure 1.

6.2 Disconnect the connector at J3.

6.3 Using a 11/32" nutdriver remove the

two nuts (2) that secure the transformer to
the terminal plate (2).

6.4 Remove the transformer from the studs
on the terminal plate.

7. Transformer Replacement

7.1 Place the transformer (3) onto the studs

on the terminal plate (2).

7.2 Using a 11/32" nutdriver secure the
transformer (3) to the terminal plate (2)
using the nuts (2).

3. Crossover Assembly Removal

3.1 Perform procedure 1.

3.2 Remove the four screws (4) securing

the crossover assembly (13) to the terminal
plate (2).

3.3 Gently lift the crossover assembly (13)
off of the tabs on the terminal plate (2).

4. Crossover Assembly Replacement

4.1 Place the crossover assembly (13) onto

the terminal plate (2) and gently push it on
to the tabs.

4.2 Secure the crossover assembly (13) to
the terminal plate (2) using four screws (4).

4.3 Perform procedure 2.

7.3 Preform procedure 2.

8. 70/100 Volt Input Connector Removal

8.1 Remove the two screws (6) that secure

the connector (10) to the terminal plate (2).

8.2 Lift the connector up off of the terminal
plate. You might need to use a flatblade
screwdriver to gently pry the connector up.

9. 70/100 Volt Input Connector
Replacement

9.1 Place the connector (10) over the

terminal plate (2) and while aligning the
pins to the crossover PCB gently push the
connector into place.

9.2 Secure the connector to the terminal
plate using the screws (6).

5. Woofer Removal

5.1 The woofer is not accessible and

therefore the bass module assembly is not
repairable.

4

DISASSEMBLY/ASSEMBLY PROCEDURES

8. Satellite Grille Removal

8.1 Place a plastic flat blade tool between

the edge of the grille (15) and the edge of
the satellite enclosure (16). With a twisting
action, gently release the grille from the
catches on the satellite enclosure. Use
care not to cosmetically damage the
satellite enclosure.

9. Satellite Grille Replacement

9.1 Place the grille (15) onto the cube

assembly with the logo (14) at the bottom
and snap it into place.

10. Twiddler Removal

10.1 The satellite assembly is not repair-

able.

5