35 Jewel Cube® Speaker, 5 Pack Packaging List ........................................................ 11
Warranty
The Lifestyle®PS18/28/35 powered speaker system is covered by a limited 1-year transferable
warranty.
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 SERVICE CENTER OR OWNER OF THE BOSE
PRODUCT, AND SHALL NOT BE REPRODUCED OR USED FOR ANY
OTHER PURPOSE.
1
PS18/28/48 Service Manual
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. 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.) Refer to
UL6500 paragraph 9.1.1. 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, IEC 60065 paragraph 9.1.1. 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 testing 3 wire products, the resistance measured to the product enclosure
should be between 2 and infinite Meg ohms. Also, the resistance measured to exposed output/
input connectors should be between 4 and infinite Meg ohms. When testing 2 wire products, the
resistance measured to exposed output/input connectors should be between 4 and infinite Meg
ohms. 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.
CAUTION: THE BOSE®PS 28 AND PS 35 POWERED SPEAKERCONTAINS NO USER-SERVICEABLE PARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICING TO
WARRANTY SERVICE STATIONS OR FACTORY SERVICE.
2
PS18/28/48 Service Manual
Specifications
Mechanical
Dimensions:
Weight: Module: 35.9 lb (16.3 kg)
Drivers: Bass module: Two woofers, 5 1/4", 2.33 Ohms,
Bass Module: 8.0" W x 23.0" D x 16.0" H
(20.32 x 58.42 x 40.64 cm)
Single Satellite: 3.1” W x 4.0” D x 3.1” H
(7.0 x 10.2 x 7.9 cm)
Double Satellite: 3.1" W x 4.0" D x 6.02" H
Jewel Cube
Single Satellite: 1.1 lb (0.5 kg)
Double Satellite: 2.4 lb (1.1 kg)
Jewel Cube speaker: 1 lb (0.5 kg)
speaker:
(7.8 x 10.2 x 15.7 cm)
2.2" W x 8.0" D x 2.6" H
(39.4 x 20.3 x 6.6 cm)
Electrical
(wired in parallel)
Single Satellite speaker: One Twiddler
Double Satellite speaker: Two Twiddler speakers per cube, 50 mm, 4 Ohms
(wired in series)
Jewel Cube speaker: Two Twiddler speakers per cube, 2 1/4", 3.2 Ohms
USA/Canada : 120 VAC, 60Hz
Europe, UK, AUS : 230/240VAC, 50Hz
Dual Voltage : 115/230VAC, 50/60Hz
20A peak for first 33.3 msec.
3
(stereo mode)
PS18/28/48 Service Manual
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 PCB are listed in the 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. This part is set to the Lifestyle
®
28/38 system equalization. To use this part on a Lifestyle® 18, 35
or 48 system, refer to the instructions located on page 31 for setting the Equalizer using TAP
commands. Except for the Lifestyle® 18 system, in place of using TAP commands to set the EQ,
the customer may use the Bose® AdaptIQTM audio calibration system to customize the EQ to their
room. The Lifestyle® 18 system bass module is set to provide a lower outut to match the single
cubes, which can only be set using TAP commands. The AdaptIQ audio calibration system is
®
shipped with the Lifestyle
18,28,35,38,48 system.
Part List Table of Contents
The part list is broken into sections relative to the way the system is packaged and built, starting
from the system level and ending at the component level.
System Packaging - Console, bass module, cube pack, essentials kit.
Essentials Kit - Remote, batteries, antennas, power pack, line cords, IR Blaster, TV sensor.
Lit Kit - Feet, owner’s guide, installer’s guide.
Cube Speaker Pack - Cubes, connection cables
Bass Module Assembly - Amplifier module, woofer, grille
Amplifier Module Assembly - Power PCB, amplifier PCB, DSP PCB
Electrical Part List - Resistors, Capacitors, Diodes, Transistors, ICs, Misc.
Lifestyle® 18 Home Theater System Packaging ............................................................................................. 5
Figure 1. LS18 System Packaging Exploded View ............................................................................................. 5
Lifestyle® 28 Home Theater System Packaging ............................................................................................. 6
Figure 2. LS28 System Packaging Exploded View ............................................................................................. 6
Lifestyle® 35 Home Theater System Packaging ............................................................................................. 7
Figure 3. LS35 System Packaging Exploded View ............................................................................................. 7
Lifestyle® 18/28/35 Essentials Kit Part List .................................................................................................... 8
Lifestyle® 18 Lit Kit Part List ......................................................................................................................... 10
Lifestyle® 28 Lit Kit Part List ......................................................................................................................... 10
Lifestyle® 35 Lit Kit Part List ......................................................................................................................... 10
Lifestyle® 18 Single Cube Speaker, 5 Pack Packaging List ......................................................................... 11
Lifestyle® 28 Double Cube Speaker, 5 Pack Packaging List .......................................................................11
Jewel Cube Part List...................................................................................................................................... 13
PS18/28/48 Electrical Part List ................................................................................................................. 17-31
4
PS18/28/48 Service Manual
Lifestyle® 18 Home Theater System Packaging
Item
Number
1 CARTON 268787-001
2 PACKING, INSERT, GRILL 258465
3 PACKING, END CAP, EPS, FRONT 258466
4 PACKING, END CAP, EPS, REAR 258475
5 BAG, POLY 196638
6 PACKING PAD, 29.38X21.38 258469
7 AV28, US TUNER, RC1
1 CARTON, RSC 258474-002
2 PACKING INSERT GRILLE 258465
3 PACKING END CAP EPS FRONT 258466
4 PACKING END CAP EPS REAR 258475
5 BAG POLY 196638
6 PACKING PAD 29.38X21.38 258469
7 AV28, US TUNER, RC1
ESSENTIALS KIT, LS-35, DUAL
11 FOAM, SHT, ADHESIVE BACK 263426
12 GUIDE, QUICK SETUP 266254
13 COMMITMENT LETTER 251001
Description Part Number Note
266440-1019
266440-2049
266440-3029
278799-619
278799-629
256815-113 OR -119
256815-123 OR -129
266217-1
266217-2
266217-4
266217-5
266217-6
1
1, 4
1
1
13
12
7
10
2
34
11
8
9
6
1
5
Figure 2. LS28 System Packaging Exploded View
6
PS18/28/48 Service Manual
Lifestyle® 35 Home Theater System Packaging
Item
Number
1 CARTON, RSC 258474-002
2 PACKING INSERT GRILLE 258465
3 PACKING END CAP EPS FRONT 258466
4 PACKING END CAP EPS REAR 258475
5 BAG POLY 196638
6 PACKING PAD 29.38X21.38 258469
7
8 PS18/28/35, BASS MODULE, BLACK, DUAL V
9 SAT ASSY, 5 PK, BLACK
10 ESSENTIALS KIT, LS-35, 120V, (US)
11 FOAM, SHT, ADHESIVE BACK 263426
12 GUIDE, QUICK SETUP 266255
13 COMMITMENT LETTER 251001
AV28, US TUNER, RC1
AV28, EURO TUNER, RC4
AV28, JAP, IR REMOTE, RC2
Important - Note 4. This part is set to the Lifestyle® 28/38 system equalization. To use this part on
a Lifestyle® 18, 35 or 48 system, refer to the instructions located on page 31 for setting the Equalizer using TAP commands. Except for the Lifestyle® 18 system, in place of using TAP commands to
set the EQ, the customer may use the Bose® AdaptIQTM audio calibration system to customize the
EQ to their room. The Lifestyle® 18 system bass module is set to provide a lower outut to match
the single cubes, which can only be set using TAP commands. The AdaptIQ audio calibration
system is shipped with the Lifestyle® 18,28,35,38,48 system.
For other notes referenced, refer to the part list notes at the beginning of the part list section.
2. In the “Connection Description” window, type
the name “LS28, 35 bass module test” then
click “OK”; any name may be entered.
3. In the “Connect To” window, select the COM
port on your computer that you will be connecting the bass module to and then click OK.
4. In the “COM1 Properties” window, make the
selections in the various fields as shown.
5. In the Hyper Terminal window, click on File/
Properties. In the Properties window, click on
the Settings tab, make the selections in the
various fields as shown.
6. In the Settings window, click on
ACSII setup and make the selections and changes as shown.
32
9 PIN D-SUB FEMALE
PS18/28/48 Service Manual
RCA PLUG
Figure 11. Test cable part number 264564
8 PIN RJ45
2
3
6
RJ45
7
8
8 PIN
33
PS18/28/48 Service Manual
Placing the Bass Module into TAP Mode
! Place all four DIP switches to the down position before returning the unit to the customer !
1. Place the bass module into TAP mode
1.1 Set all four DIP switches into the “up”
position. Apply power to the bass module
using the AC line switch and wait until the
amber LED blinks twice and the green LED
blinks briefly at least once (approximately 3
seconds after power up). Then, within twenty
seconds, flip ALL four switches down, then
flip switch #4 (closest to the RJ-45 connector)
back up. The unit will now communicate in
TAP mode. The amber and green LED will
blink alternately when no S/PDIF signal is
applied. Note that when TAP mode is activated in this manner, the DSP will echo
characters sent by the terminal.
UP
12
3
4
Down
2. Verify the bass module communicates in
TAP mode.
2.1 Connect the test cable’s, part number
264564, DB-9 connector to the RS-232 COM
port on your computer. Connect the test
cable’s RJ-45 connector to the bass module.
2.2 Type the command ST S and hit “Enter”.
The following response should be seen on
your computer screen. The results may differ
depending on the unit settings. If no S/PDIF
signal is applied, the sample rate will be 29
kHz.
Type the equalization setup command
SE [SPEAKER TYPE], [EUROPEAN BASS],
[EUROPEAN TREBLE]
ConditionCommand
SPEAKER
TYPE
SE A =singleshot (18) ONOFF
D = doubleshot (28)
C = cricket (35)
U = User EQ
Example: To set the equalization to cricket
cubes, euro bass off and euro treble off, type
the command as follows. SE C,OFF,OFF
EURO
BASS
EURO
TREBLE
2.3 Check the software by typing (issuing)
the command TN 4 and then hitting “Enter”. A
typical response would be as follows.
03DE6455, 010808
03DE6455 is the checksum
010808 is the software version
Verify the changes have been made by typing
the command ST S.
The speaker type (SPKR TYPE) and other
information will be displayed. Decode the
numerical two digit speaker type as follows.
01 Doubleshots (Later version dual cube)
02 Cricket (Jewel
®
Cube)
128 Dublin (Single Cube)
05 User EQ (ADATiQTM audio calibration)
34
Test Procedures
PhaseChannel FrequencyInput
PS18/28/48 Service Manual
Test setup procedures
Place the bass module into TAP mode using the
procedures on page 26.
Note: Place all four DIP switches into the down
position before returning the unit to the customer.
Test cable part number 264564, Figure 16, is
needed to test the bass module.
Connect the D-sub, 9 pin connector on the test
cable to the COM port on your computer.
Connect the RJ-45, 8 pin connector to the bass
module.
The bass module requires a digital audio input.
Connect the analog output of an oscillator to the
analog input of an Analog to Digital (A-D)
converter. Connect the test cable’s RCA connector to the A-D converter S/PDIF output.
2 Bass Module Air Leak Test
2.1 Apply a 200 mVrms, 40 Hz signal to the
input of the A-D converter.
2.2 Check for air leaks from the cabinet.
Listen near the areas where the plastic seals
to the wood.
Test setup procedures
Remove the amplifier module from the bass
module assembly. Refer to the disassembly/
assembly procedures located in this manual.
Connect an 8 Ohm, 50W resistive load to the
left, center, right, left surround, and right
surround speaker outputs. Connect a 1.6
Ohm, 150W resistive load to the woofer
output, J4.
Note: Do not tie the five RCA speaker output
grounds together.
1. Sweep Test
1.1 Issue the following TAP commands:
SO ALL D (select all digital source inputs)
SP 5 (5 speaker mode)
VO CB 0 (set volume to full output, 0dB)
MU AMP OFF (unmute the amp)
1.2 Apply a 200 mVrms, 25 Hz signal to the
left and right input of the analog to digital (AD) converter. Listen for any extraneous noises
such as rubbing, scraping, or ticking.
Note: No extraneous noises such as rubbing,
scraping or ticking should be heard. To distinguish between normal suspension noise, rubs
and ticks, displace the woofer cone with your
finger. If the sound can be made to go away or
get worse, it’s a rub or tick and the woofer
should be replaced. If the noise stays the
same, it’s normal suspension noise and it will
not be heard with regular program material.
1.3 Sweep the bass module from 40 Hz to 300 Hz.
Listen carefully for any buzzes, rattles
or extraneous noises coming from the bass
module.
Note: Redress any wire or component that
buzzes.
Turn the amplifier off and then place it into
TAP mode using the procedures on page 26.
Issue the TAP command: VO CB -20
(set volume output to -20dB)
Note: Because the DSP has just booted (or
rebooted) prior to being put into TAP mode
and issuing this command, the amplifier
module is now in a known state.
3. Input to Output Gain
3.1 Apply a 500 mVrms signal, at a frequency
and phase listed in the following table, to the
left and right input of the A-D converter.
Note: For a 180
0
phase output, apply the
positive output of a balanced output oscillator
to the negative input of the A-D converter and
the negative to the positive.
3.2 Measure the gain from the input to the AD converter to the speaker output listed in
the table below.
Left8dB ± 2.0dB
Center16dB ± 2.0dB
Right8dB ± 2.0dB
Left Surround16dB ± 2.0dB
Right Surround16dB ± 2.0dB
Bass22dB ± 2.0dB
4. Speaker Output Noise
4.1 Short the right and left inputs to the A-D
converter.
4.2 Measure the output at the left, right,
center, left surround, right surround, and
bass channel output. It should be < 500
uVrms.
7. Bass Channel Large Signal Distortion
7.1 Apply a 100 Hz signal to the A-D converter
input at a level to obtain 11 Vrms measured at
the bass channel resistive output load.
7.2 Measure the distortion at the bass channel
output. It should be <.2% THD+N
8. Bass Channel DC Offset
8.1 With no signal applied, measure the DC
offset at the bass channel output. It should be
<25 mVdc.
9. Place the Unit in Normal Operation Mode
9.1 Before returning the bass module to the
customer, place the unit in normal operation
mode. Place all four DIP switches into the
down position (toward RCA plugs).
5. Cube Channel Large Signal Distortion
5.1 Apply a 1.0 kHz signal to the A-D con-
verter input at a level to obtain 11 Vrms
measured at the channel’s resistive output
load.
Note: When measuring the left or right
channel output, apply the signal to one
channel only. When measuring the center
channel, apply the signal to the left and right
channel. When measuring the surround
channels, apply the balanced output signal to
the left and right channel with one channel
1800 out of phase with the other.
5.2 Issue the TAP command: VO CB 0
(set volume output to 0dB, full output)
5.3 Measure the distortion at the left, right,
center, left surround, right surround output. It
should be <0.1% THD+N.
6. Cube Channel DC Offset
6.1 With no signal applied, measure the DC
offset at the left, right, center, left surround,
right surround, and bass channel output. It
should be <70 mVdc.
10. Cube Speaker Phase Test
Note: The DC voltage should only be momen-
tarily applied to the cube speaker input to
avoid damaging the speakers.
10. 1 Observing polarity, momentarily apply 8 Vdc
to the input of the cube speaker.
10.2 The speakers should move outward with
the application of the dc voltage. Check the
cube wiring if it moves inward.
11. Cube Speaker Sweep Test
11.1 Apply an 11 Vrms, 20 Hz signal to the
input of the cube. Change the applied signal to
8 Vrms, 150 Hz. Sweep the oscillator from 150
Hz to 2 kHz.
11.2 Listen for rubs, ticks, air leaks, buzzes or
other extraneous noises.
Note: Defects such as rubs, ticks and air leaks
will typically be most audible during the 20 Hz
test. Defects such as buzzes will typically be
heard during the 150 Hz to 2 kHz sweep.
Note: The cube cubes are not repairable. The
Jewel Cube
®
speakers are repairable.
36
PS18/28/48 Service Manual
Bass Module Disassembly Procedures
1. Rear Cover Removal
Remove four screws - pull off cover
2. Amp Module Removal
Remove six screws - pull off amp module unplug woofer harness
3. Amplifier Module Cover Removal
Remove 12 screws
4. Power PCB Removal
Disconnect J103, lift up PCB
37
PS18/28/48 Service Manual
Bass Module Disassembly Procedures
5. DSP, AMP, AC Jack PCB Removal
DSP PCB - Lift up DSP PCB. (ensure grounding clips
remain in place)
AMP PCB - Remove four screws, lift up AMP PCB. (ensure
grounding clips and heat sink insulator remain in place, note
spring bar location for reference when replacing)
AC Jack PCB - Remove 2 screws, lift up AC Jack PCB.
DSP PCB
Ensure grounding clips indicated remain in place
AMP PCB
Ensure grounding clips indicated remain in place
38
PS18/28/48 Service Manual
Cube Speaker Disassembly Procedures
Double and Single Cube Disassembly
1. Double and Single Cube Grille Removal
Remove grille with a flat plastic blade tool
Note: The TwiddlerTM speakers are not removable
Jewel
1. Grille Removal
Remove grille with a flat plastic blade tool
®
Cube Disassembly
2. Twiddler Speaker Removal
Pull off rubber screw covers
then remove four screws
3. Twiddler Speaker Removal
Pull out Twiddler speaker
Note wire configuration
Cut wires close to terminals
39
PS18/28/48 Service Manual
Figure 13. PCB Part Number Identification
Figure 14. Date Of Manufacture (DOM) Identification
The DOM is the four underlined numbers in the serial number.
Example: DOM 1303 -YDDD = 303rd day of 2001.
40
Revision Page
Revision 03-04 - Add new service bom part numbers for PCBs - new DSP PCB: ECN 36696
REV05-06 - Add AMP PCB Assembly 267332-0
Rev07-08 - add ROHS PCBS
Rev08-09 - add new heat sink enclosure
Rev09-10 - add new console power pack ecn43202
Rev10-11 - woofer pn change
REV11-12 D201 pn change
REV12-13: Jewel twid changed
Revison 00 - 01: Changed part number 260351-001 to 260351-002 per ECN32954
Specifications and Features Subject to Change Without Notice
Bose Corporation
The Mountain
Framingham Massachusetts USA 01701
R/N 268795-SM REV.1307/08 (H)
http://serviceops.bose.com
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