Bose 131 User manual

1
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® Residential 131 Loudspeaker contains no
user-servicea le parts. To prevent warranty infractions, refer
servicing to warranty service stations or factory service.
CONTENTS
Specifications....................................................................................................................................2
Product Description .........................................................................................................................2
Warranty Information.........................................................................................................................2
Disassem ly/Assem ly Procedures ................................................................................................3
Figure 1. E ploded View ...................................................................................................................3
Test Procedures ...............................................................................................................................4
Part List..............................................................................................................................................5
Figure 2. Residential 131® Loudspeaker E ploded and Packing Views ............................................5
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External Dimensions:
Single Speaker: 12" 8" 5" (30.5cm 20.3cm 12.7cm)
Packed System: 14" 12" 7.75" (35.5cm 30.5cm 19.7cm)
Weight:
Single Speaker: 4.0lb (1.8kg)
Packed System: 9.5lb (4.3kg)
Transducer Complement: One 4.5" driver per loudspeaker
Internal Ca inet Volume: 160cu in. (2.65 liters) (Does not include
0.25 liter displaced by mounted driver).
Port:
Description: Two contoured slot ports located concentrically
at the driver.
Total Port Area: 0.91 sq in. (2.3 sq cm)
Port Length: 3.1in (7.9cm)
Resonance Frequency: 80Hz
Impedance: 1.2 Ohm nominal
Power Handling: 40 Watts, (7.0 Vrms) Continuous per IEC-265-5
Sensitivity: 91 dB SPL, free field, per IEC-268-5
SPECIFICATIONS
PRODUCT DESCRIPTION
The Model 131® Residential Loudspeaker is a residential version of the Bose® 131 Marine
Loudspeaker. It uses a new square grille that is better suited to residential environments
than the Marine version. The driver is the same as the one used in the Bose Model 32
Loudspeaker.
WARRANTY INFORMATION
The Model 131 Residential Loudspeaker is covered by a 5-year transferable
limited warranty.
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DISASSEMBLY/ASSEMBLY PROCEDURES
1. Grille Removal
1.1 Insert a small scribe point into one of
the grille mesh holes near the edge of the
plastic mounting flange.
1.2 Carefully pull the grille outward away
from the flange until it comes loose. Be
careful not to damage the grille or the
plastic mounting flange.
2. Grille Replacement
2.1 Align one corner of the grille into a
corner of the plastic mounting flange.
2.2 Starting at the corner selected, carefully
press the grille into the mounting flange until
it snaps into place. Make sure the grille is
flush with the edges of the flange.
Note: Be sure to align the Bose® logo on
the grille with the others in the installation if
necessary.
3. Mounting Flange Removal
3.1 Remove the grille using procedure 1.
3.2 Using a Philips-head screwdriver,
remove the si screws that secure the
mounting flange to the loudspeaker enclo-
sure.
3.3 Lift the mounting flange away from the
enclosure.
4. Mounting Flange Replacement
4.1 Align the mounting flange with the
loudspeaker enclosure. The mounting
flange is labeled to align the cutouts in the
flange with the ports in the loudspeaker
enclosure. Line up the word "port" in two
locations on the flange with the two ports
located in the enclosure.
4.2 Secure the mounting flange to the
enclosure using the si screws removed in
procedure 3.2.
Figure 1. Exploded View
5. Driver Removal
Note: Numbers in parentheses correspond
to the callouts in Figure 1.
5.1 Perform procedure 1.
5.2 Perform procedure 3.
5.3 Remove the three screws (3) that
secure the driver to the enclosure (1).
5.4 Lift the driver (2) out of the enclosure.
5.5 Cut the two wires as close to the
terminals as possible and remove the
driver.
2
3
1
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3. Ru and Tick Test
3.1 Apply a 3.6Vrms, 10Hz signal to the
speaker input terminals.
3.2 Listen carefully for a rubbing, ticking,
or scraping noise from the driver.
No e traneous noises should be heard.
Note: To distinguish between normal
suspension noise and rubs or ticks, dis-
place the cone of the driver slightly with
your fingers. If the noise can be made to
go away or get worse, it's a rub or tick and
the driver should be replaced. If the noise
stays the same, it's normal suspension
noise and it will not be heard with program
material.
4. Power Sweep Test
4.1 Apply a 3.6Vrms, 10Hz signal to the
speaker input terminals.
4.2 Sweep the speaker from 10Hz to
5kHz. The sweep rate shall be 3-5 seconds
for increasing and decreasing sweep.
Note: A whooshing noise from the port at
appro imately 80Hz is acceptable.
4.3 Listen for any buzzes, rattles, or other
e traneous noises. Replace any driver that
fails, and redress any wires that may buzz.
6. Driver Replacement
6.1 Connect the two wires to the driver's
terminals. The red wire connects to the
positive (+) terminal and the black wire
connects to the negative (-) terminal. The
terminal polarities are marked on the driver
basket ne t to the terminals.
6.2 Secure the driver (2) to the enclosure
(1). Be sure to align the gasket to provide
an airtight seal.
6.3 Check the driver's response using the
test procedures in this manual.
6.4 Align the mounting flange with the two
loudspeaker enclosure ports, and secure
the flange to the enclosure using the si
screws removed in procedure 3.2.
6.5 Replace the grille, if necessary, using
procedure 2.
Test Procedures
Note: When performing the following tests,
it is not necessary to remove the driver from
the enclosure. There are no crossover
components in the enclosure to affect the
tests. Connect the test equipment directly to
the speaker leads.
1. Phase Test
1.1 Apply +6.0 Vdc ± 1Vdc to the speaker
input terminals. Observe polarity when
connecting the dc power supply. The driver
should move outward.
2. Air Leak Test
2.1 Apply a 3.6Vrms, 80Hz signal to the
speaker input terminals.
2.2 Listen for air leaks, audible as a
whistling or sputtering sound, around the
driver and the enclosure. There should be
no audible air leaks. All repairs must be
hidden.
TEST PROCEDURES
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PART LIST
Figure 2. Residential 131® Loudspeaker Exploded and Packing Views
Part List Notes:
1. This part is not normally available from Customer Service. Approval from the Field Service
Manager is required before ordering.
3
3X
1
2
4
BAG SUPPLIED
WITH ITEM 1
2X
2X 7
69
8
5
NOTE:
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©1999 Bose Corporation
Part Num er 253844 Rev. 00
Service Manual
Model 131® Residential Loudspeaker
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SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE
Bose Corporation
The Mountain
Framingham Massachusetts USA 01701
P/N: 253844 Rev. 00 8/99 FOR TECHNICAL ASSISTANCE OR PART ORDERS, CALL 1-800-36 -4008
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