Safety Information .....................................................................................................................................................3
Part List Notes ...........................................................................................................................................................6
Packaging Part List, L1 Model I Power Stand (see Figure 1).................................................................................7
Figure 1. L1 Model I Power Stand Packaging V iew.....................................................................................................8
Packaging Part List, L1 Model I Line Array (see Figure 2) .....................................................................................9
Figure 2. L1 Model I Line Array Packaging View.........................................................................................................9
Packaging Part List, B1 Bass Module (see Figure 3) ...........................................................................................10
Main Part List, L1 Model I Power Stand (see Figure 4) ........................................................................................11
Figure 4. L1 Model I Power Stand Exploded V iew.....................................................................................................12
Main Part List, L1 Model I Power Box (see Figure 5) ...........................................................................................13
Figure 5. L1 Model I Power Box Exploded View .......................................................................................................13
Main Part List, L1 Model I Input Panel Assembly (see Figure 6) .........................................................................14
Figure 6. L1 Model I Input Panel Assembly Exploded View ......................................................................................15
Main Part List, Remote Control Assembly (see Figure 7) ....................................................................................16
Figure 7. Remote Control Assembly Exploded V iew .................................................................................................16
Main Part List, L1 Model I Upper and Lower Line Source Arrays (see Figure 8) ...............................................17
Figure 8. L1 Model I Line Array Exploded View.........................................................................................................18
Main Part List, B1 Bass Module Exploded View (see Figure 9)...........................................................................19
Electrical Part Lists ........................................................................................................................................... 20-69
Figure 1 1. L1 Model I Power Stand Block Diagram ...................................................................................................78
T est Procedures ................................................................................................................................................ 79-85
Figure 12.
L1 Model I Power Stand Sof tware Update Procedure ..........................................................................................90
Theory of Operation ......................................................................................................................................... 91-111
Line Array Wiring Diagram ................................................................................................................................134
IC Diagrams ...................................................................................................................................................141-153
Service Manual Revision History ......................................................................................................................154
Amplifier Output Test Cable Wiring Diagram ............................................................................................86
®
Model I Power Stand ............................................6
2
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.) 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 60056 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 MOhms. Also, the resistance measured to exposed
input/output connectors should be between 4 and infinite MOhms. When testing 2 wire products, the resistance measured to exposed input/output connectors should be between 4 and
infinite MOhms. 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.
CAUTION: The Bose® L1® Model I System contains no user-serviceable parts. To pre-
vent warranty infractions, refer servicing to warranty service stations or factory service.
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.
3
Specifications
MECHANICAL
External Dimensions
®
Model I Cylindrical Radiator®:Height: 86.0 in (2184 mm)
L1
Width: 3.5 in (89 mm)
Depth: 4.0 in (105 mm)
L1 Model I Power Stand:Height: 5.0 in (127 mm)
Width: 26.0 in (660 mm)
Depth: 26.0 in (660 mm)
B1 Bass Module:Height: 15.3 in (380 mm)
Width: 10.3 in (257 mm)
Depth: 18.0 in (457 mm)
R1 Remote:Height:1.6 in (40 mm)
Width: 2.8 in (71 mm)
Depth: 5.6 in (141 mm)
Weight
L1 Model I Cylindrical Radiator:14.5 lbs (6 kg) Upper
16.0 lbs (7 kg) Lower
L1 Model I Power Stand:35 lbs (16 kg)
B1 Bass Module:25 lbs (12 kg)
R1 Remote:0.6 lbs (0.27 kg)
Transducer Complement
L1 Model I Cylindrical Radiator:24 x 2.25 in (57 mm) Drivers - 4 ohms
B1 Bass Module:2 x 5.25 in (133 mm) Drivers - 8 ohms
ACOUSTICAL
Frequency Response
L1 Model I Cylindrical Radiator:120 Hz to 15 kHz
B1 Bass Module:40 Hz to 250 Hz
L1 Model I System (with system EQ):40 Hz to 15 kHz
Port Tuning
L1 Model I Cylindrical Radiator:114 Hz
B1 Bass Module:44 Hz
4
Specifications
ELECTRICAL
Impedance
®
L1
Model I Cylindrical Radiator®:4 ohms nominal, both sections in parallel
Lower Model I line array section:8 ohms nominal
Upper Model I line array section:8 ohms nominal
B1 Bass module (optional):8 ohms nominal
System Power Handling
(Continuous full power per IEC-268-5 for duration of 100 hours)
L1 Model I Cylindrical Radiator:250 W
B1 Bass module:125 W
Unbal TS, -10dBu (nom) +3dBu max
Efficiency:80% minimum
THD at Rated Power:1.0% Max @ 30 Hz - 15 KHz @ 4 ohms/Ch.
THD at -3dB (~125W):0.25% Max @ 30 Hz - 15 KHz @ 4 ohms/Ch.
S/N ratio:-80dB minimum, referenced to full power
Frequency Response:40 Hz-15 KHz +/-3 dB @ R load = 4-16 ohms
Thermal:Operate 2Ch. x 83 W Continuous @ 4 ohms,
50°C ambient with No Shut-Down
AC Power Rating:US/Canada: 100-127V, 50/60Hz 1000W
International: 220-240V, 50/60Hz 1000W
Max Power Draw:1400 watts 50/60 Hz
Peak In Rush Current:US/Canada: 32 A @ 120V, 60 Hz
International: 16A @ 230V, 60Hz
Power Supply Voltages:Channels 1 and 2 SMPS 27.5 VDC +/-2%
Auxiliary supply #1 +5 VDC/1 A +/- 3%
Auxiliary supply #2 +3.3 VDC/1.5 A +/- 3%
Fan 1.2.3.4 Voltage:+24 VDC +/-1V
5
Differences between the PS1 Power Stand and the L1® Model I Power Stand
The L1 Model I Power St and is very similar to the Personalized Amplification System PS1 Power
Stand. There are some significant differences, however:
1. The line array is now powered by one 250W amplifier instead of two. The two line array
sections (upper and lower) are now wired in parallel and powered by a single amplifier. Each
line array section impedance is now 8 ohms, with the two sections wired in parallel, for a total of
4 ohms in operation. The line arrays sections used with the PS1 power stand were 4 ohms
each. Due to optimization of the speaker to the amplifier, the overall output level of the L1 Model
I system is virtually the same as the PAS system. There is a mechanical stop to prevent users
from plugging a PAS line array into an L1 Model I power stand. Users can however insert an L1
Model I line array into a PAS PS1 Power Stand. This will not harm the unit, but will result in a
lower output level (~1.5 dB less).
2. The Amp 1 IN, Amp 2 IN, Amp 3 IN, All Amps IN, Amp 1 OUT and Amp 2 OUT jacks have
been removed from the L1 Model I Power Stand. These connectors were originally intended for
users to access the power stand amplifiers in a stand-alone fashion. They were rarely used on
the PS1 Power Stand.
CAUTION: Be sure to use only L1 Model I upper and lower line array sections with the L1 Model
I power stand. It is physically possible to connect a PAS upper line array section onto an L1
Model I lower line array section. Doing so will result in an excessive current drain on the L1
Model I power stand amplifier board, possibly causing a failure.
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.
W arranty
The Bose
The L1 Model I line array and the B1 bass module are covered by a 5-year limited warranty.
®
L1 Model I System electronics are covered by a limited 1-year transferable warranty.
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 PCBs are listed in the Electrical 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 referenced for informational purposes only. It is not stocked as a repair part. Refer
to the next higher assembly for a replacement part.
6
Packaging Part List
L1® Model I Power St and (see Figure 1)
Item
Number
- Carton Kit, Includes Carton,
Cardboard A & B, and Packing
PE Foams 1 – 4.
1 PS1 Filler Card Board - A 275437 1450-7370+1 2
2 Carry Bag for Power Stand 275468 8901-4920-0 1
3 Poly Bag for Carry Bag - 1497-7572-0 1 4
4 Poly Bag - 1497-1062-0 1 4
5 Owner’s Manual, DVD
9 PS1 Filler PE - Foam 4 275442 1493-0421+3 2
10 PS1 Filler PE - Foam 2 275440 1493-0411+3 1
11 L1 Model I Power Stand Assy - REF 1 4
12 Poly Bag for Power Stand - 1497-7572-0 1 4
13 PS1 Filler PE - Foam 3 275441 1493-0401+3 2
14 R1 Remote Control Assembly
w/packaging
15 PS1 Filler PE - Foam 1 275439 1493-0391+3 1
16 PS1 Filler Card Board - B 275438 1450-7410+4 4
17 Carton, PS1 Power Stand 275846 1436-4302+3-3 1
18 Line Cord, 120V, 15A, US/Can 035393 - 1 3
Line Cord, 230V, 15A, Euro 283048 SVC-PS121+AAC 1 Line Cord, 230V, 15A, Aus 283623 7012-5430+0 1 Line Cord, 230V, 15A, UK 283624 7010-9810+0 1
Line Cord, 100V, 15A, Japan 298167 SVC-PS101+AAC 1
19 Poly Bag for Fuse - 1497-0332-0 1 4
20 Fuse, T15A, 125V/250V,
6.3x32mm, US/Can/Japan
Fuse, T10A, 125V/250V,
6.3x32mm, Euro/UK/Aus
Description Bose® Part
Number
307131 SVC-PS111+CKIT 1
306618
306316-01
035394 SVC-PS111+REM 1
307732 5120-0023+0 1 3
279425 5120-0170+0 1
Vendor Part
Number
8901-5080+1
4115-0009+0
Qty. Note
1
7
1
2
3
4
5
6
9
7
18
19
20
7
8
9
10
11
12
13
13
7
14
15
1
Figure 1. L1
16
17
®
Model I Power Stand Packaging View
8
4x
Packaging Part List
L1® Model I Line Array (see Figure 2)
Item
Number
- Carton Kit, Includes Cardboard
Description Bose® Part
Number
307132 - 1
Vendor Part
Number
Qty. Note
A and B, and Packing PE
Foams 1 - 5
1 Packing PE Foam 4 307719 1493- 0461-0 1
2 Packing PE Foam 2 307717 1493- 0441-0 2
3 Poly Bag - 1497-7562-0 2 4
4 Packing PE Foam 1 307716 1493- 0431-0 1
5 Packing Cardboard A 307720 1450-7380-0 2
6 Packing PE Foam 5 306626 1493- 0471-0 1
7 Line Sour ce Lower Assembly REF - 1
8 Line Source Upper Assembly REF - 1
9 Line Source Carry Bag 275470 - 2
10 Poly Bag for Carry Bag - - 2 4
11 Packing Cardboard B 306628 1450-7400-0 1
12 Packing PE Foam 3 307718 1493-0451-0 1
13 Carton, no fillers 306629 1437-9702+1-3 1
1
5
2
3
3
4
2
6
7
8
9
10
11
12
5
Figure 2. L1 Model I Line Array Packaging View
9
13
Packaging Part List
B1 Bass Module (see Figure 3)
Item
Number
Description Bose® Part
Number
Vendor Part
Number
Qty. Note
- Carton Kit – Includes All Fillers 307133 - 1
1 Carton Filler, PE Foam 303838 - 2
2 Poly Bag, 12x16x49” - 1497-4552-0 1
3 B1 Bass Module REF - 1
4 Bass Module Carton, No Fillers 303837 - 1
5 Bubble Bag for Cable - 1497-1122-0 1
6 4-Wire Speakon Cable
035404 7012-6620-2 1
Assembly
7 Poly Bag for Instruction Manual - 1497-1062-0 1
8 Owner's Manual 303154 - 1
- Carry Bag for Bass Module 035025 - 1
5
2x
6
7
8
1
2
3
4
Figure 3. B1 Bass Module Packaging View
10
Main Part List
L1® Model I Power St and (see Figure 4)
Item
Number
1 Screw, Mach, M4x14, Blk, Zinc 276999 2904-4014-3000 19
2 Screw, Mach, M4x8, Blk, Zinc 276997 2904-4008-3000 4
3 Housing, Lower, Power Stand 264035 SVC-PS111+LCAB 1
4 Power Sta nd Ca vit y Assem bly,
consists of:
Plate, Base, Power Stand - 1404-9601-0 1 4
PS1 Slide Spring - 2510-3611-0 1 4
Screw, Flat-CS, M2.6x8, BZ - 2901-2608-3001 4 4
Screw, Mach, M6x35mm, Blk, Zinc,
Slide Block
Screw, Mach, M4x8 276997 2904-4008-3000 2 4
Cavity, Aluminum, Power Stand - 4135-3731-0 1 4
Guide, Cavity, Power Stand - 4135-3741-0 1 4
Latch, Power Stand - 4135-3751-0 1 4
Slide, Power Stand - 4135-3761-0 1 4
Plate, Latch, Power Stan d - 4135-3771-0 1 4
Post, Copper, Power Stand - 4135-3971-0 1 4
Pedal, Foot, Power stand - 4154-6921-0 1 4
Screw, Mach, M4x14, Blk, Zinc 276999 2904-4014-3000 4 Screw, Mach, M3x8, Blk, Latch Plate - 2901-3008-3000 4 4
Gasket, EVA, 5x500mm - 4153-3331-0 2 4
5 Power Box As sembly, includes PCBs
US/Canada, 120V
Euro, UK, Aus, 230V
Japan, 100V
6 Screw, Mach, M3x10, Blk, Zinc - 2900-3010-3030 16 4
7 Housing, Upper, Power Stand 264034 1466-4801-0 1
8 Power Sta nd Prot ec ti ve Plu g 035410 4154-7251-0 1
9 Power Sta nd Foot Pe dal 264039 4154-692 1-0 1
10 DSP PCB Assembly 283364 SVC-PS111+DSP 1 2
11 MCU PCB Assembly 306284 SVC-PS111+MCU 1 2
12 Input PCB Assembly 306283 SVC-PS111+INP1 1 2
13 Input Panel Assembly, includes DSP,
MCU and Input PCBs
US/Can, 120V
Euro, UK, Aus, 230V
Japan, 100V
14 Power Stand Push Button 2639 79 2446-4901-0 4
15 Screw, Mach, M3x10, Input Panel 277004 2911-3010-3000 18
16 Power Stand V/R Knob 263986 2446-630 1-0 4
17 Power Stand Door Assy, includes: 273727 SVC-PS111+DOOR 1
US/Canada, Japan, 100/ 120V
Euro, UK, A us, 220- 240V
Note: Item 3, D-Class Am p PCB As se m bly , has bee n chan ged to part number 312945 for all
voltage variants starting with DOM 0061
3/2/10 use part num ber 306282.
D101 LL4148, SM 4804-1480+3 4
D102 LL4148, SM 4804-1480+3 4
D103 LL4148, SM 4804-1480+3 4
D104 LL4148, SM 4804-1480+3 4
D105 LL4148, SM 4804-1480+3 4
D106 LL4148, SM 4804-1480+3 4
D107 LL4148, SM 4804-1480+3 4
D108 LL4148, SM 4804-1480+3 4
D109 LL4148, SM 4804-1480+3 4
D110 LL4148, SM 4804-1480+3 4
D113 LL4148, SM 4804-1480+3 4
D114 LL4148, SM 4804-1480+3 4
D115 LL4148, SM 4804-1480+3 4
D116 LL4148, SM 4804-1480+3 4
D117 LL4148, SM 4804-1480+3 4
D118 LL4148, SM 4804-1480+3 4
D119 LL4148, SM 4804-1480+3 4
D120 LL4148, SM 4804-1480+3 4
D121 LL4148, SM 4804-1480+3 4
D122 LL4148, SM 4804-1480+3 4
D123 LL4148, SM 4804-1480+3 4
D124 LL4148, SM 4804-1480+3 4
D125 LL4148, SM 4804-1480+3 4
D126 LL4148, SM 4804-1480+3 4
D127 LL4148, SM 4804-1480+3 4
D127A LL4148, SM 4804-1480+3 4
D128 LL4148, SM 4804-1480+3 4
D128A LL4148, SM 4804-1480+3 4
D129 LL4148, SM 4804-1480+3 4
D130 LL4148, SM 4804-1480+3 4
D131 LL4148, SM 4804-1480+3 4
D132 LL4148, SM 4804-1480+3 4
D133 LL4148, SM 4804-1480+3 4
D134 LL4148, SM 4804-1480+3 4
D135 LL4148, SM 4804-1480+3 4
D136 LL4148, SM 4804-1480+3 4
D137 LL4148, SM 4804-1480+3 4
D138 LL4148, SM 4804-1480+3 4
D139 LL4148, SM 4804-1480+3 4
D140 LL4148, SM 4804-1480+3 4
D141 LL4148, SM 4804-1480+3 4
D142 LL4148, SM 4804-1480+3 4