Bose FreeSpace 3 Bedienungsanleitung

FreeSpace®3

Loudspeaker System

Service Manual

Part Number 256589-SM Rev. 01

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®FreeSpace 3 Loudspeaker System contains no

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

warranty service stations or factory service.

WARRANTY INFORMATION

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

limited warranty.

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

SPECIFICATIONS

System Components: Satellite: 1 21/4” Twiddler™ in Satellite Speaker

Bass Module: 1 51/4” Woofer

Dimensions: 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)

Weight: Single Satellite: 1.1 lbs. (.5 kg)

Bass Module: 13.7 lbs. (6.2 kg)

Packed System: 16 lbs. (7.3 kg)

Electrical Crossover: Frequency: 200 Hz @ 6 dB/octave

Impedance: 6 Ohm nominal 4.8 Ohm minimum from 20 Hz to 20 kHz

Power Handling: 50 Watts (17.3 Vrms) Continuous per IEC-268-5

Compatibility: Receivers: 10 to 100 Watts per channel

Sensitivity (1W, 1m): Satellites: > 73 dB SPL, free field, per IEC-268-5

(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 (cubes): 2.0 Gauss max. @ 30 mm from any surface of the satellite

System Protection: PTC, resistor and lamp

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).

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.

5. Woofer Removal

5.1 The woofer is not accessible and

therefore the bass module assembly is not

repairable.

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).

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).

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.

DISASSEMBLY/ASSEMBLY PROCEDURES

10 6

DISASSEMBLY/ASSEMBLY PROCEDURES

Figure 1. FreeSpace®3 Disassembly View

TEST SETUP PROCEDURES

Factory Default Settings 4 Ohm Test Setup Setting

70 and 100 Volt Setup Settings

Figure 2. Test Setup Diagrams

TEST PROCEDURES

1. Bass Module Air Leak Test

Note: Use the 4 Ohm setup connection for

the following test procedures.

1.1 Apply a 6 Vrms, 50 Hz signal to mono

input terminals of the bass module. Do not

connect the satellite speakers.

1.2 Listen carefully for air leaks from

around the front and rear end caps, all

cabinet seams and the terminal plate. Air

leaks will be heard as a hissing or sputter-

ing sound. Test duration should be 5 sec-

onds minimum. All repairs must be hidden.

Note: The input voltage should be the

actual voltage present at the input, and not

the open circuit generator output.

Refer to the connection diagrams on page 6

for the proper connection configuration.

3. System Sweep Test

3.1 Set up the system as shown in

Figure 2 stereo setup settings.

3.2 Apply a 6 Vrms, 10 Hz signal to the

stereo input terminals of the bass module.

3.3 While listening to the output of the

system, sweep the input frequency slowly

from 10 Hz to 500 Hz. The output should

crossover from the bass module to the

satellites speakers.

Note: A whooshing noise from the bass

module port at around 40 Hz and 160 to

180 Hz is acceptable.

3.4 Reduce the input level to 3 Vrms.

3.5 Continue sweeping from 500 Hz to 15

kHz. Listen for a clean, undistorted output

from each satellite assembly. Replace any

satellite that buzzes or sounds distorted.

Note: The FreeSpace®3 bass module

woofer and satellite speakers are not

repairable. If you have a defective bass

module or satellite speaker, it must be

replaced.

4. 70/100 Volt Input Test Procedure

Note: This test is only to check that the

transformer connections are functioning.

4.1 Apply a 13 Vrms, 50 Hz signal to the 70

Volt input terminals.

4.2 Sweep the input frequency from 50 Hz

to 500 Hz.

4.3 Apply a 13 Vrms, 50 Hz signal to the

100 Volt input terminals.

4.4 Repeat procedure 4.2.

2. Woofer Phase Test

2.1 Apply a 6 Vrms, 50 Hz signal to the

stereo input terminals of the bass module.

2.2 While the signal is being applied to the

bass module, remove the input to one of

the stereo terminals.

2.3 The sound output level should drop by

approximately half. If the sound output level

increases, stays the same, or stops com-

pletely, then there is a wiring problem at the

crossover assembly or woofers.

MAIN PART LIST

Figure 3. FreeSpace 3®Bass Module Exploded View

Item

Number

Description Part Number Qty. Note

1 SCREW, #8-32 x .25, PAN, XREC 290303-04 4 4

2 NUT, HEX, 8-32, KEPS 118260-08 2 4

3 TRANSFORMER, AUTO, 100W 291091-001 1

4 PLATE, I/O 292292 1

5 GASKET, TERMINAL BLOCK 187460 1

6 SCREW, TAPP, 6-20, PAN, XREC - 4

7 SCREW, TAPP, 6-20, PAN, XREC 290301-10 6 4

8 CONNECTOR, BARRIER, WR PINS 254416-08 1

9 CONNECTOR, BARRIER, WR PINS 254416-12 1

10 CONNECTOR, TERMINAL BLOCK STRIP 254416-03 1

11 SCREW, WOOD, 8-11x .75, FLAT, XREC 289388-012 10 4

12 CROSSOVER, ASSEMBLY 291027-001 1

13 GROMMET, GRILLE, .635” 117995 6

14 NAMEPLATE, 1”, DIAMOND CUT, BLACK

NAMEPLATE, 1”, DIAMOND CUT, WHITE 193250-11

193250-12 2

15 GRILLE ASSEMBLY, SATELLITE, BLACK

GRILLE ASSEMBLY, SATELLITE, WHITE 192410-019

192410-029 2

16 SATELLITE ASSEMBLY, BLACK

SATELLITE ASSEMBLY, WHITE 250490-149

150490-159 2

- BRACKET, BASSBOX 184892 1

- SCREW, ¼ x 20, 3/4L, HEX 179114-12 4 4

CROSSOVER ELECTRICAL PART LIST

Resistors

Capacitors

Inductors

Miscellaneous

Reference

Designator

Description Part Number Note

R11 5.1 OHM, WW, 5W 132105-5R1 4

R21 5.1 OHM, WW, 5W 132105-5R1 4

Reference

Designator

Description Part Number Note

C10 100uF, EL, 85ºc, 50V, 20% 289958-101 4

C20 100uF, EL, 85ºc, 50V, 20% 289958-101 4

C11 10uF, EL, BP, 85ºc, 50V, 20% 290391-100 4

C21 10uF, EL, BP, 85ºc, 50V, 20% 290391-100 4

Reference

Designator

Description Part Number Note

L11 350 uH 292703-001 4

L21 350 uH 292703-001 4

Reference

Designator

Description Part Number Note

PTC11 POLYSWITCH, 60V, 4mm 190348-110K 4

PTC21 POLYSWITCH, 60V, 4mm 190348-110K 4

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