Bose 802 Series III Bedienungsanleitung

Service Manual

Bose®802®

Series III Loudspeaker

Part Number 260432 REV. 02

SPECIFICATIONS

WARRANTY: 5 year limited warranty

External dimensions:

Single speaker: 13.5" H x 20.5" W x 13.0" D (34.3 x 52.1 x 33.0)cm

Packed system: 14.4" H x 21.8" W x 18.3" D (36.6 x 55.4 x 46.4)cm

Weight:

Single speaker: 29.3 lbs (13.29 kg)

Packed system: 32 lbs (14.5 kg)

Transducer: Eight 4.5" environmental drivers per enclosure

Internal cabinet volume: 3,020.7 cu. In. (49.5 liters)

Port:

Type: Two round ports located central to each four speaker pattern.

Total port area: 6.0 sq. in. (38.9 sq. cm)

Port length: 7.5" (19.0 cm)

Resonance frequency: 50 Hz

Impedance: 8 ± 2 Ohm

Power handling: 240W continuous per IEC-268-5

Sensitivity: 91 dB SPL, 1W, 1m

Contents

Specifications ....................................................................................................................................2

Disassembly/Assembly Procedures ........................................................................................... 3-4

Figure 1. Schematic Diagram ..............................................................................................................4

Figure 2. Wiring Diagram .....................................................................................................................4

Figure 3. Driver Location Diagram.......................................................................................................4

Test Procedures ................................................................................................................................5

Main Part List.....................................................................................................................................6

Figure 4. Exploded View ......................................................................................................................6

Shading Network Part List ............................................................................................................... 7

Figure 5. Shading Network Layout ......................................................................................................7

Packaging Part List ...........................................................................................................................7

Figure 6. Packaging View .................................................................................................................... 7

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 PUR-

POSE.

Clips stay

in cabinet

Secures

trim ring

Note: Numbers in parenthesis correspond to

call-outs in figure 4.

1. Grille Removal

1.1 Remove the four screws (16) securing

the trim ring (8) to the cabinet. Pull off the trim

ring leaving the four clips (17) in place on the

cabinet.

1.2 Remove the four screws (10) securing the

grille (6) to the cabinet. Pull off the grille.

2. Grille Replacement

2.1 Line up the grille (6) with the cabinet and

secure it with four screws (10).

2.2 Line up the trim ring (8) with the cabinet.

Press the trim ring into the four clips (17)

located in the corners of the cabinet.

2.3 Replace the four screws (16) securing the

trim ring to the cabinet.

3. Driver Removal

3.1 Perform procedure 1.

3.2 Remove the three screws (10) securing

the driver (1) to the cabinet. Lift out the driver.

3.3 Cut the wires as close as possible to the

driver’s wire terminal.

4. Driver Replacement

4.1 Referring to figures 1, 2, and 3, attach the

wires to the driver’s (1) wire terminal.

Tinnerman clips

located inside

on back wall

Speakon

connector

Shading network PCB

located inside

front wall

4.2 Line up the driver and gasket (2) to the

cabinet and secure it with three screws (10).

5. Shading Network PCB Removal/Access

5.1 Remove the position 2, 3, 6, and 7 drivers

(1) from the cabinet using procedure 3.1-3.2.

5.2 Using a short flat-blade screwdriver,

remove the two screws securing the shading

network PCB (3) to the inside wall of the

cabinet. Remove wires as needed.

6. Shading Network PCB Replacement

6.1 Referring to figure 2, replace any wires

that were removed.

6.2 Replace the two screws securing the

shading network PCB (3)

7. Speakon Connector Removal

7.1 Perform procedure 3.1-3.2 to remove the

position 2, 3, 6, and 7 drivers.

7.2 Using a flat-blade screwdriver, pry out the

tinnerman clip (5) securing the Speakon

connector (4) to the cabinet.

7.3 Pull out the Speakon connector and

remove the wires.

4321

8765

Top of speaker

Driver location

DISASSEMBLY/ASSEMBLY PROCEDURES

4321

8765

8. Speakon Connector Replacement

8.1 Referring to the figure 2, attach the wires to the Speakon connector (4).

8.2 Align the Speakon connector in the cabinet.

8.3 Reshape the tinnerman clip (5) or use a new one. Place an appropriate size wood block

between the Speakon connector (rear of speaker) and a hard surface. Using a flat-blade screw-

driver (or similar tool) and a hammer, secure the tinnerman clip into place. Make sure the

Speakon connector is securely fastened.

DISASSEMBLY/ASSEMBLY PROCEDURES

+_+_+_+_+_+_+_+_

326

741 5 8

PTC

5 uF

20 uF

OR BL

BL WH

YL WH GY GN

Figure 2. Wiring Diagram

Figure 1. Schematic Diagram

Figure 3. Driver Location Diagram

Top of speaker

Earlier Versions Later Versions

RED

WHITE

DVR 2- (BLUE)

DVR 3+ (RED)

DVR 7- (GREEN)

WHITE

YELLOW

GREEN

ORANGE

BLUE

ORANGE

BROWN

BLACK

GREEN

BROWN

BLUE

DVR 1- (WHITE)

DVR 8- (BLACK)

REAR VIEW OF

NEUTRIK CONNECTORS

GREY

CROSSOVER BOARD_802

GREEN

GREY

RED

BLACK

RED

+_+_+_+_+_+_+_+_

326

741 5 8

PTC

5 uF

20 uF

OR PU

BL WH

YL PK GY BLK

PINK

WHITE

DVR 2- (BLUE)

DVR 3+ (RED)

DVR 7- (GREEN)

YELLOW

BLUE

ORANGE

GREEN

BROWN

DVR 1- (WHITE)

DVR 8- (BLACK)

REAR VIEW OF

NEUTRIK CONNECTORS

GREY

CROSSOVER BOARD_802

GREY

PINK

WHITE

PURPLE

ORANGE

RED

BLACK

PINK

PURPLE

BROWN

Positive input

Negative input

1. Phase Test

1.1 Observing polarity, apply 9 VDC to the

input connector. Refer to the figure below.

1.2 All driver cones should move outward.

Referring to figure 1, rewire any driver that

moves inward.

2. Crossover Test

2.1 Connect a 0.5 Ohm resistor and amplifier

to the speaker input connector as shown in

the diagram below.

2.2 Apply a 2 Vrms signal to the speaker input

connector at the frequencies listed in the table

below.

2.3 Measure the voltage across the 0.5 Ohm

resistor comparing the results to the table

below. If the voltage is out of range, check the

crossover components and wiring.

Amplifier

0.5 Ohm

Speaker

Volt meter

Speaker Output

Frequency Min Max

8 kHz 104 mVrns 141 mVrms

12 kHz 77 mVrms 120 mVrms

TEST PROCEDURES

3. Rub and Tick Test

3.1 Apply a 10 Vrms, 10 Hz signal to the

speaker input connector.

3.2 No extraneous noises such as rubbing,

scraping or ticking should be heard.

Note: To distinguish between normal suspen-

sion noise and rubs or ticks, slightly displace

the cone of the driver with your fingers. If the

noise can be made to go away or get worse, it

is a rub or tick and the driver should be

replaced. If the noise stays the same, it is

normal suspension noise and the driver is

fine. Suspension noises will not be heard with

program material.

4. Air Leak Test

4.1 Apply a 15 Vrms, 65 Hz signal to the

speaker input connector.

4.2 Listen for air leaks around the drivers and

cabinet seam. Reposition or replace any

gasket found to leak. Repairs made to the

cabinet seam should not be visible from the

exterior of the speaker.

5. Sweep Test

5.1 Apply a 10 Vrms, 10 Hz signal to the

speaker input connector.

5.2 Sweep the signal generator from 10 Hz to

500 Hz.

5.3 Apply a 500 Hz, 5 Vrms signal to the

speaker input connector.

5.4 Sweep the signal generator from 500 Hz

to 5 kHz.

5.5 Listen for buzzes, rattles or other noises.

Redress any wire that buzzes; replace any

driver that is found to be defective.

Note: A whooshing noise from the port at its

resonance frequency of 50 Hz is acceptable.

x30

x24

Figure 4. Exploded View

MAIN PART LIST

Item

Number Description Part

Number Qty. Note

1 DRIVER, 4.5" 290722-001 8 1

2 GASKET, 4.5" 259111 8

3 NETWORK, SHADING 291189-001 1

4 CONN, SPEAKON, PANEL MOUNT 254423 2

5 CLIP, TINNERMAN 187943 2

6 GRILLE, BLACK

GRILLE, ARCTIC WHITE

GRILLE, PRO GRAY

256350-001

256350-002

256350-004

7 NAMEPLATE, LOGO, BLACK

NAMEPLATE, LOGO, ARCTIC WHITE 254457-001

254457-002 1

8 RING TRIM, BLACK

RING TRIM, WHITE 256349-001

256349-002 1

9 SCREW, THUMB, M8 x 1.25 x 25mm 137050 2

10 SCREW, TAPP, 8-15, HEXW, SLOT 290290-12 30

11 COVER, NEUTRIK, SEALING 252384 2

12 CONN, FUSE CLIP, 1 POS, FEMALE 291366 2

13 NUT, J-TYPE, 8-32 109481 24

14 LATCH, SPRING 293290-001 4

15 CLIP, PUSH-ON, DIA .375 252379 2

16 SCREW, TAPP, 6-13x.5, PAN, XR 290294-08 4

17 CLIP, PUSH-ON, U-TYPE 290295-01 4

18 SCREW, TAPP, 6-20x.5, PAN, XR 290296-08 2

Note: When ordering a driver, also order a driver gasket.

SHADING NETWORK PART LIST

Item

Number

Description Part

Number

Qty. Note

1 20uF, FILM, 75V, 10% 119026 1

2 5.0uF, MYLAR, 100V, 10% 102770 1

3 POLYSWITCH, 50V, 31mm 175233-2 1

Figure 5. Shading Network Layout

Item

Number

Description Part

Number

Qty. Note

1 CARTON, RSC 256592 1

2 PACKING, PAD, DIE CUT 191669 2

3 PACKING, CORNER BLOCK 191668 4

4 MANUAL, OWNERS 256598 1

5 BAG, POLY, 23 x 44 x 10.5 x 1.25 100652 1

PACKAGING PART LIST

Figure 6. Packaging View

Date Revision

Level

Description of Change Change Driven

Pages

Affected

02/01 00 Document release revision

00 Service manual

release All

02/06 01 Added RoHS part numbers This product is

now built with

RoHS

compliant parts.

07/07 02 Added new schematic ECN 3

SERVICE MANUAL REVISION HISTORY

Specifications and Features Subject to Change Without Notice

Bose Corporation

The Mountain

Framingham Massachusetts USA 01701

P/N 260432 REV. 02 07/2007 (P) For Technical Assistance or Part Orders, Call 1-800-233-4408

http://serviceops.bose.com

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