BOSE PANARAY LT 6403, PANARAY LT 9403, PANARAY LT 6400 Service Manual

Contents

Warranty Information ............................................................................................................................... 1

Specifications....................................................................................................................................... 2-5

Product Descriptions .............................................................................................................................. 6

Part List Notes ..........................................................................................................................................6

Packing List, Panaray

Figure 1. Panaray LT 6403 Packaging View .......................................................................................... 7

Packing List, Panaray LT 6400 Mid/High Frequency Loudspeaker.................................................. 8

Figure 2. Panaray LT 6400 Packaging View .......................................................................................... 8

Packing List, Panaray LT 9403 Full-Range Loudspeaker .................................................................. 9

Figure 3. Panaray LT 9403 Packaging View .......................................................................................... 9

Packing List, Panaray LT 9400 Mid/High Frequency Loudspeaker................................................ 10

Figure 4. Panaray LT 9400 Packaging View ........................................................................................10

Main Part List, Panaray LT 6403 Full-Range Loudspeaker (see Figure 5) ................................... 11

Figure 5. Panaray LT 6403 Loudspeaker Exploded View ....................................................................12

Main Part List, Panaray LT 6400 Mid/High Frequency Loudspeaker (see Figure 6) .................. 13

Figure 6. Panaray LT 6400 Loudspeaker Exploded View ....................................................................14

Main Part List, Panaray LT 9403 Full-Range Loudspeaker (see Figure 7) ................................... 15

Figure 7. Panaray LT 9403 Loudspeaker Exploded View ....................................................................16

Main Part List, Panaray LT 9400 Mid/High Frequency Loudspeaker (see Figure 8) .................. 17

Figure 8. Panaray LT 9400 Loudspeaker Exploded View ....................................................................18

Disassembly Procedures ............................................................................................................... 19-21

Test Procedures .............................................................................................................................. 21-22

Figure 9. Input Board Layout Diagram ................................................................................................. 23

LT 6403 and LT 9403 Crossover Board Layout Diagram .................................................................. 24

LT 6400 and LT 9400 Crossover Board Layout Diagram .................................................................. 25

LT 6403 and LT 9403 Crossover Wiring Diagrams ............................................................................ 26

LT 6400 Mid/High Loudspeaker Crossover Wiring Diagram .......................................................... 27

LT 9400 Mid/High Loudspeaker Crossover Wiring Diagram .......................................................... 27

LT 6403 and LT 9403 Passive or Bi-amp Loudspeaker Configuration ........................................... 28

Rotating the Waveguide.......................................................................................................................29

High Frequency Compression Driver Replacement Procedure ................................................... 30

High Frequency Compression Driver Diaphragm Replacement Procedure......................... 30-31

Accessories Used With the Panaray LT Loudspeakers .................................................................. 32

Service Manual Revision History ....................................................................................................... 33

LT 6403 Full-Range Loudspeaker ................................................................. 7

CAUTION: The Bose® Panaray LT 6403 and LT 9403 Full Range loudspeakers

and LT 6400 and LT 9400 Mid/High Frequency Loudspeakers

contain no user-serviceable parts. To prevent warranty infractions,

refer servicing to warranty service stations or factory service.

Warranty Information

The Bose Panaray LT 6403, LT 9403, LT 6400 and LT 9400

Loudspeakers are covered by a 5-year transferable limited 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 BOSE SERVICE CENTER OR OWNER OF THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED FOR ANY OTHER PURPOSE.

Specifications

LT 6403 F

ange

oudspeake

Dimensions:

22.2" D x 24.10" W x 34.4" H (612mm x 564mm x 873mm)

Weight:

Unpacked: 135lb (61kg) Packaged: 160lb (73kg)

Rear

Side

Top/Bottom

Front

Front (with Grille)

LT 9403 F

ange

oudspeake

Dimensions:

22.2" D x 24.10" W x 34.4" H (612mm x 564mm x 873mm)

Weight:

Unpacked: 135lb (61kg) Packaged: 160lb (73kg)

Rear

Side

Top/Bottom

Front

Front (with grille)

Specifications

LT 6400 Mid/High Frequency Loudspeaker

Dimensions:

22.6" D x 24.10" W x 25.2" H (574mm x 612mm x 640mm)

Weight:

Unpacked: 80 lb (36.29 kg) Packaged: 102 lb (46.27 kg)

LT 9400 Mid/High Frequency Loudspeaker

Dimensions:

22.6" D x 24.10" W x 25.2" H (574mm x 612mm x 640mm)

Weight:

Unpacked: 80 lb (36.29 kg) Packaged: 102 lb (46.27 kg)

Acoustical Specifications

Specifications

Passive

Full-Range Speakers

Power Handling 500W 300W 100W Impedance 8 Ohms 8 Ohms 8 Ohms Sensitivity (1W/1M) 94 dB SPL 93 dB SPL 100 dB SPL Maximum SPL (pink noise @ 1M @ rated power) Recommended Crossover Internal Crossover:

Frequency Range (+3 dB) 50 Hz - 16 kHz Beamwidth (-6dB point, average 800 - 5 kHz)

(Full Range)

121 dB SPL

127 dB SPL (peak)

Low Frequency

@ 300Hz

Mid/High @ 1.8kHz

6403 Speaker: Horizontal: 65 degrees, Vertical: 52 degrees 9403 Speaker: Horizontal: 93 degrees, Vertical: 49 degrees

124 dB SPL (peak) Low Frequency HPF: 50 Hz, 4th order or better LPF: 300Hz, 2nd order or better Mid/High Frequency HPF: 300Hz, 2nd order or better

Low Mid/High

118 dB SPL

Bi-Amped LT 6403 and LT 9403

120 dB SPL

126 dB SPL (peak)

LT 6403 Active Equalization Curve

LT 9403 Active Equalization Curve

Acoustical Specifications

Specifications

LT 6400 and LT 9400 Mid/High Frequency Speakers

Power Handling 100W 100W Impedance 8 Ohms 8 Ohms Sensitivity (1W/1M) 100 dB SPL 101 dB SPL Maximum SPL (pink noise @ 1M @ rated power) Internal Crossover Mid/High Frequency

Frequency Range (+3 dB) 200 Hz - 16 kHz 200 Hz - 16 kHz Beamwidth (-6dB point, average 800 - 5 kHz)

Horizontal: 65 degrees,

LT 6400 LT 9400

120 dB SPL

126 dB SPL (peak)

@ 1.8kHz

Vertical: 52 degrees

127 dB SPL (peak)

Mid/High Frequency

Horizontal: 93 degrees,

Vertical: 52 degrees

121 dB SPL

@ 1.8kHz

LT 6400 Active Equalization Curve

LT 9400 Active Equalization Curve

Product Descriptions

Panaray® LT 6403 and LT 9403 Full-Range Loudspeakers

The Bose® Panaray LT 6403 and LT 9403 Full-Range loudspeakers are full range, three way devices. They use a 15" woofer, a V2 mid-frequency driver and a 1.0" compression driver mounted on a 60 x 40 (LT 6403) or a 90 x 40 (LT 9403) constant directivity horn assembly. This horn assembly can be rotated 90 degrees to allow sideways placement of the speakers.

These loudspeakers can be operated in passive or bi-amplified mode.

• In passive mode, the internal passive crossover network is utilized and a single amplified signal is connected to the loudspeaker.

• In bi-amplified mode, the low-frequency and mid/high-frequency drivers are accessed through separate pins on the NL4 connectors.

Panaray LT 6400 and LT 9400 Mid/High Frequency Loudspeakers

The Panaray LT 6400 and LT 9400 Mid/High Frequency Loudspeakers are essentially the same as the LT 6403 and LT 9403 full range versions, but without the 15" woofer. They use a V2 midfrequency driver and a 1.0" compression driver mounted on a 60 x 40 (LT 6400) or a 90 x 40 (LT

9400) constant directivity horn. The horn assembly in the LT 6400 and LT 9400 can be rotated 90

degrees as in the LT 6403 and LT 9403.

Active equalization of all four loudspeakers can be provided by using the ControlSpaceTM ESP-88 or the Panaray Digital System controller which has presets for each Panaray speaker and combination of speakers. A parametric equalizer can also replicate the active equalization curves on the previous pages, along with high-pass and low-pass filters as shown.

All of these speakers have sixteen steel threaded inserts - four top, four bottom and four on each side. Threaded inserts are SAE 3/8 - 16 thread, with at least 18 usable threads.

Hanging hardware for these speakers can be purchased from ATM Flyware at http://www.atmflyware.com.

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.

Packing List

Panaray® LT 6403 Full-Range Loudspeaker

Item

Number

1 2 CUSHIONING MATERIAL - LT6403-5-106 1 3 PE BAG - LT9702-III-5-108 1 4 OWNER'S MANUAL 286541 BOSE/LT6403 1 5 PE BAG - LT6403-5-109 1 6 TRIANGLE PAPER - LT6403-5-103 4 7 CARTON, LT6403 - LT6403-5-107 1

KIT, CARTON, 6403FR, CONSISTS OF: EPE COVER

Description Bose® Part

Number

286539

Vendor Part

Number

LT6403-5-111

Qty.

Figure 1. Panaray LT 6403 Packaging View

Packing List

Panaray® LT 6400 Mid/High Frequency Loudspeaker

Item

Number

1 PAPER, LT6400, 674X712X120MM - LT6400-5-101 2 2 CUSHIONING MATERIAL, LT6400,

674X712X120MM 3 PE BAG, 1425X1100X0.04MM - LT6400-5-103 1 4 TRIANGLE PAPER, LT6403,

618X575X0.3MM 5 USER MANUAL 276859 - 1 6 PE BAG, 310X220X0.04MM - LT6400-5 1 7 CARTON, LT6400, 698X726X774MM - LT6400-5-104 1

Description Bose® Part

Number

- LT6400-5-102 2

- LT6400-5 2

Vendor Part

Number

Qty.

Figure 2. Panaray LT 6400 Packaging View

Packing List

Panaray® LT 9403 Full-Range Loudspeaker

Item

Number

1 2 CUSHIONING MATERIAL - LT6403-5-106 1 3 PE BAG - LT9702-III-5-108 1 4 OWNER'S MANUAL 286541 BOSE/LT9403 1 5 PE BAG - LT6403-5-109 1 6 TRIANGLE PAPER - LT6403-5-103 4 7 CARTON, LT6403 - LT6403-5-107 1

KIT, CARTON, 9403FR, CONSISTS OF: EPE COVER

Description Bose® Part

Number

286540

Vendor Part

Number

LT6403-5-111

Qty.

Figure 3. Panaray LT 9403 Packaging View

Packing List

Panaray® LT 9400 Mid/High Frequency Loudspeaker

Item

Number

1 PAPER, LT6400, 674X712X120MM LT6400-5-101 2 2 CUSHIONING MATERIAL, LT6400,

674X712X120MM 3 PE BAG, 1425X1100X0.04MM LT6400-5-103 1 4 TRIANGLE PAPER, LT6403,

618X575X0.3MM 5 USER MANUAL 276859 - 1 6 PE BAG, 310X220X0.04MM LT6400-5 1 7 CARTON, LT6400, 698X726X774MM LT6400-5-104 1

Description Bose® Part

Number

LT6400-5-102 2

LT6400-5 2

Vendor Part

Number

Qty.

Figure 4. Panaray LT 9400 Packaging View

Main Part List

Panaray® LT 6403 Full-Range Loudspeaker (see Figure 5)

Item

Number

1 GRILLE ASSY, LTFR, BLACK

GRILLE ASSY, LTFR, WHITE (INCLUDES SCREWS, TAPE, LOGO, FASTENER & SPRING)

2 SCREWS, GRILLE, BLACK

SCREWS, GRILLE, WHITE 3 GASKET, INPUT PANEL - - 1 4 4 INPUT PANEL ASSY, BLACK

INPUT PANEL ASSY, WHITE 5 SCREW, INPUT PANEL - - 6 4 6 CROSSOVER BOARD ASSY 286536 297508 1 7 TRANSFORMER, AUDIO 285256 298547 1 8 1 INCH COMPRESSION DRIVER 286543 286543 1 9 V2 SPEAKER ASSY, BLACK

V2 SPEAKER ASSY, SILVER

10 WOOFER, 15 INCH, LTFR 286542 286542 1 11 SCREW, WOOFER 286538 297532 8 4

- LOGO ASSY, LT FR, BLACK LOGO ASSY, LT FR, WHITE (INCLUDES LOGO, TAPE, FASTENER & SPRING)

- KIT, DIAPHRAGM, 1 INCH COMPRESSION DRIVER, LTFR

- SCREW, 3/8 X 16, LT-III 289971 289971 16

Note: Product codes 040180 and 040181 are RoHS compliant versions of the Model 6403 loudspeaker. Only the RoHS compliant parts listed in the above table can be used. The Model 6403 loudspeaker, product codes 037830 and 037831 can use both part numbers listed above.

Description Part Number

for Product

Code 037830

and 037831

286533 291903

276847 291904

286534 291906

276850 292117

276848 291905

286544 286544 1

Part Number

for Product

Code 040180

and 040181

297530 298590

276847 291904

297531 299313

298172 298559

276848 291905

Qty. Note

Figure 5. Panaray LT 6403 Loudspeaker Exploded View

Main Part List

Item

Description Part Number

Part Number

Qty. Note

Panaray® L T 6400 Mid/High Frequency Loudspeaker (see Figure 6)

Number

1 LOGO ASSY, BLACK

LOGO ASSY, WHITE

2 GRILLE ASSEMBLY, BLACK

GRILLE ASSEMBLY, WHITE (INCLUDES SCR EWS, TAPE, LOGO, FASTENER AND SPRING)

3 GASKET, GRILLE, 587X12X1.5MM - - 2 4 4 GASKET, GRILLE, 604X29X1.5MM - - 2 4 5 WAVEGUIDE ASSY, BLA CK

WAVEGUIDE ASSY, WHITE

6 GASKET, WAVGD, 535X18X1.5MM 7 GASKET, WAVGD, 574X19X1.5MM 8 SCREW, 9.5X20MM, BLACK - - 16 4 9 GASKET, INPUT PANEL - - 1

10 INPUT PANEL ASSEMBLY, BLACK

INPUT PANEL ASSEMBLY, WHITE

11 SCREW, 4X18MM, BLACK - - 6 4 12 WASHER, NYLON - - 7 4 13 CROSSOVER PCB ASSEMBLY - 299314 1 14 SCREW, 4X15MM, BLACK - - 7 4 15 1 INCH COMP DRIVER, LTFR 286543 286543 1 16 VEE TWO SPEAKER ASSY, BLK

VEE TWO SPEAKER ASSY, WHT

17 SCREW, 4X12MM, BLACK - - 3 4 18 SCREW, 6X40MM, BLACK - - 12 4 19 LOCK WASHER, 11.3X6.3X1.6MM - - 12 4 20 WASHER, 16X6.5X1.2MM - - 12 4 21 SCREW, 4X12MM, BLACK - - 22 4

- TRANSFORMER, AUDIO 285256 298547 1

- REPAIR KIT, 1" COMP DRIVER 286544 286544 1

for Product

Code 039887

and 039888

276848

291905 291908-001 291908-002

- - 2

291910-001 291910-002

276850

292117

for Product

Code 040184

and 040185

276848

291905 297501-001 297501-002

- 1 4

297509-001 297509-002

298172

298559

1 1

Note: Product codes 040184 and 040185 are RoHS compliant versions of the Model 6400 loudspeaker. Only the RoHS compliant parts listed in the above table can be used. The Model 6400 loudspeaker, product codes 039887 and 039888 can use both part numbers listed above.

Figure 6. Panaray LT 6400 Loudspeaker Exploded View

Main Part List

Panaray® LT 9403 Full-Range Loudspeaker (see Figure 7)

Item

Number

1 GRILLE ASSY, LT FR, BLACK

GRILLE ASSY, LT FR, WHITE (INCLUDES SCREWS, TAPE, LOGO, FASTENER & SPRING)

2 SCREWS, GRILLE, BLACK

SCREWS, GRILLE, WHITE 3 GASKET, INPUT PANEL - - 1 4 4 INPUT PANEL ASSY, BLACK

INPUT PANEL ASSY, WHITE 5 SCREW, INPUT PANEL - - 6 4 6 CROSSOVER BOARD ASSY, 9403 286537 297534 1 7 TRANSFORMER, AUDIO 285256 298547 1 8 1 INCH COMPRESSION DRIVER 286543 286543 1 9 V2 SPEAKER ASSY, BLACK

V2 SPEAKER ASSY, SILVER

10 WOOFER, 15 INCH, LTFR 286542 286542 1 11 SCREW, WOOFER 286538 297532 8 4

- LOGO ASSY LT FR, BLACK LOGO ASSY, LT FR, WHITE (INCLUDES LOGO WITH TAPE, FASTENER & SPRING)

- KIT, DIAPHRAGM, 1 INCH COMPRESSION DRIVER, LTFR

- SCREW, 3/8 X 16, LT-III 289971 289971 16

Note: Product codes 040182 and 040183 are RoHS compliant versions of the Model 9403 loudspeaker. Only the RoHS compliant parts listed in the above table can be used. The Model 9403 loudspeaker, product codes 037828 and 037829 can use both part numbers listed above.

Description Part Number

for Product

Code 037828

and 037829

286533 291903

276847 291904

286535 291907

276850 292117

276848 291905

286544 286544 1

Part Number

for Product Code 40182

and 40183

297530 298590

276847 291904

297533 298592

298172 298559

276848 291905

Qty. Note

Figure 7. Panaray LT 9403 Loudspeaker Exploded View

Main Part List

Item

Description Part Number

Part Number

Qty. Note

Panaray® L T 9400 Mid/High Frequency Loudspeaker (see Figure 8)

Number

1 LOGO ASSY, BLACK

LOGO ASSY, WHITE

2 GRILLE ASSEMBLY, BLACK

GRILLE ASSEMBLY, WHITE (INCLUDES SCR EWS, TAPE, LOGO, FASTENER AND SPRING)

3 GASKET, GRILLE, 587X12X1.5MM - - 2 4 4 GASKET, GRILLE, 604X29X1.5MM - - 2 4 5 WAVEGUIDE ASSY, BLA CK

WAVEGUIDE ASSY, WHITE

6 GASKET, WAVGD, 535X18X1.5MM 7 GASKET, WAVGD, 574X19X1.5MM 8 SCREW, 9.5X20MM, BLACK - - 16 4 9 GASKET, INPUT PANEL - - 1

10 INPUT PANEL ASSEMBLY, BLACK

INPUT PANEL ASSEMBLY, WHITE

11 SCREW, 4X18MM, BLACK - - 6 4 12 WASHER, NYLON - - 7 4 13 CROSSOVER PCB ASSEMBLY - 299315 1 14 SCREW, 4X15MM, BLACK - - 7 4 15 1 INCH COMP DRIVER, LTFR 286543 286543 1 16 VEE TWO SPEAKER ASSY, BLK

VEE TWO SPEAKER ASSY, WHT

17 SCREW, 4X12MM, BLACK - - 3 4 18 SCREW, 6X40MM, BLACK - - 12 4 19 LOCK WASHER, 11.3X6.3X1.6MM - - 12 4 20 WASHER, 16X6.5X1.2MM - - 12 4 21 SCREW, 4X12MM, BLACK - - 22 4

- TRANSFORMER, AUDIO 285256 298547 1

- REPAIR KIT, 1" COMP DRIVER 286544 286544 1

for Product

Code 039889

and 039890

276848

291905 291908-001 291908-002

- - 1 4

- - 2

291910-001 291910-002

276850

292117

for Product

Code 040186

and 040187

276848

291905 297501-001 297501-002

297506-001 297506-002

298172

298559

1 1

Note: Product codes 040186 and 040187 are RoHS compliant versions of the Model 9400 loudspeaker. Only the RoHS compliant parts listed in the above table can be used. The Model 9400 loudspeaker, product codes 039889 and 039890 can use both part numbers listed above.

Figure 8. Panaray LT 9400 Loudspeaker Exploded View

Disassembly Procedures

CAUTION: The rear of the Panaray® LT 6403

and LT 9403 loudspeakers can become extremely hot during normal use. Do not attempt to service the loudspeakers until they have cooled to room temperature.

Panaray LT 6403 and LT 9403 Full-Range Loudspeakers

Note: Refer to Figures 5 and 7 for the

following procedures.

1. Grille Removal

1.1 Remove the screws (2) that secure the

grille assembly (1) to the cabinet.

1.2 Lift the grille assembly off of the cabinet.

2. Logo Removal

2.1 Remove the grille using procedure 1

above.

5. Audio Transformer Removal

5.1 Remove the sixteen screws that secure

the rear panel to the cabinet. Lift off the rear panel. Unplug the cable harness at X1.

5.2 Remove the two screws that secure the audio transformer to the rear panel. Lift off the audio transformer.

6. High Frequency Compression Driver Removal

6.1 Remove the sixteen screws that secure

the rear panel to the cabinet. Lift off the rear panel. Retain the gasket for re-use.

6.2 Remove the four screws that secure the compression driver mounting plate to the cabinet. Lift the compression driver out of the cabinet. Make a note of the wiring configuration, and disconnect the wires from the compression driver.

2.2 On the back of the grille, carefully remove the slotted washer that retains the spring and spacer against the back of the grille. Note the direction the spacer faces. Slide the spring and spacer off of the logo post.

3. Input Panel Assembly Removal

3.1 Remove the six screws (5) that secure

the input panel assembly (4) to the cabinet. Disconnect the cables that plug into the PCB. Lift out the assembly.

3.2 Unplug the connector at CN3.

4. Crossover PCB Removal

4.1 Remove the sixteen screws that secure

the rear panel to the cabinet. Lift off the rear panel. Unplug the cable harnesses at JP1 and X1.

4.2 Remove the nine screws that secure the crossover PCB assembly to the rear panel. Lift off the crossover PCB assembly.

6.3 Remove the four screws that secure the compression driver to the mounting plate. Lift off the driver.

7. V2 Mid Frequency Driver Assembly Removal

7.1 Remove the 16 screws securing the

rear panel to the enclosure. Remove the rear panel. Re-assembly Note: When re-installing the rear panel, be sure to torque the screws to 11 to 21 inch lbs.

7.2 Make a note of the wiring connections, and disconnect the RED (+) and BLUE (-) wires connected to the V2 driver assembly.

7.3 Remove the four screws that secure the assembly to the cabinet. These screws are located at the four corners of the V2 assembly. Do not remove the other screws around the casting. Carefully lift the assembly out of the cabinet.

Disassembly Procedures

8. 15 Inch Woofer Removal Note: The LT 6400 and LT 9400 speakers do

not have a woofer.

8.1 Remove the 16 screws securing the rear panel to the enclosure. Remove the rear panel. Re-assembly Note: When re-installing the rear panel, be sure to torque the screws to 11 to 21 inch lbs.

8.2 Make a note of the wiring connections, and disconnect the RED (+) and BLACK (-) wires connected to the woofer.

8.3 Remove the 8 screws (11) securing the woofer (10) to the enclosure.

8.4 Lift the woofer out of the enclosure. Re-assembly Note: When re-installing the

woofer, be sure to torque the screws to 11 to 21 inch lbs.

Panaray® LT 6400 and LT 9400 Mid/High Frequency Loudspeakers

CAUTION: The rear of the Panaray® LT 6400

and LT 9400 loudspeakers can become extremely hot during normal use. Do not attempt to service the loudspeakers until they have cooled to room temperature.

3. Input Panel Assembly Removal

3.1 Remove the six screws (11) that secure

the input panel assembly (10) to the cabinet. Disconnect the cables that plug into the PCB. Lift out the assembly.

3.2 Unplug the wiring harness at X1.

4. Crossover PCB Removal

4.1 Remove the eighteen screws (21) that

secure the grille assembly to the loudspeaker. Lift off the grille.

4.2 Remove the twelve screws (18) that secure the waveguide assembly to the loudspeaker cabinet. Slowly slide out the waveguide assembly and unplug the cable wiring harness at X1.

4.3 Remove the screws (14) that secure the crossover PCB assembly to the rear panel. Lift off the crossover PCB assembly.

Note: Refer to Figures 6 and 8 for the following procedures.

1. Grille Removal

1.1 Remove the eighteen screws (21) that

secure the grille assembly (2) to the cabinet.

1.2 Lift the grille assembly off of the cabinet.

2. Logo Removal

2.1 Remove the grille using procedure 1

above.

5. Audio Transformer Removal

5.1 Remove the eighteen screws (21) that

secure the grille assembly to the loudspeaker. Lift off the grille.

5.2 Remove the twelve screws (18) that secure the waveguide assembly to the loudspeaker cabinet. Slowly slide out the waveguide assembly and unplug the cable wiring harness at X1.

5.3 Remove the two screws that secure the audio transformer to the rear panel. Lift off the audio transformer.

Disassembly / Test Procedures

6. High Frequency Compression Driver Removal

6.1 Remove the eighteen screws (21) that

secure the grille assembly to the loudspeaker. Lift off the grille.

6.2 Remove the twelve screws (18) that secure the waveguide assembly to the loudspeaker cabinet. Slowly slide out the waveguide assembly and unplug the cable wiring harness at X1.

6.3 Remove the four screws that secure the compression driver mounting plate to the cabinet. Lift the compression driver out of the cabinet. Make a note of the wiring configuration, and disconnect the wires from the compression driver.

6.4 Remove the four screws that secure the compression driver to the mounting plate. Lift off the driver.

7. V2 Mid Frequency Driver Assembly Removal

7.1 Remove the eighteen screws (21) that

secure the grille assembly to the loudspeaker. Lift off the grille.

7.2 Remove the twelve screws (18) that secure the waveguide assembly to the loudspeaker cabinet. Slowly slide out the waveguide assembly and unplug the cable wiring harness at X1.

7.3 Make a note of the wiring connections, and disconnect the RED (+) and BLUE (-) wires connected to the V2 driver assembly.

7.4 Remove the four screws that secure the assembly to the cabinet. These screws are located at the four corners of the V2 assembly. Do not remove the other screws around the casting. Carefully lift the assembly out of the cabinet.

Test Procedures

Test Cable for the Panaray® LT 6403, LT 6400, LT 9403 and LT 9400 Loudspeakers

You will need to make up a test cable in order to be able to perform the tests below.

Parts Required:

1 - Neutrik 1 - Dual banana jack 6 feet of 16-18 AWG twisted pair wire

- Connect one lead of the twisted pair wire to the positive tab of the dual banana jack. Connect the other lead to the GND tab of the dual banana jack.

- Connect the positive lead of the wire to the 1+ position of the Neutrik connector. Connect the negative lead of the wire to the 1- position of the Neutrik connector. Refer to the drawing below.

Test Notes:

1. The Panaray LT 6400 and LT 9400 do not

have a woofer. You will not be able to perform the woofer related tests on these speakers.

2. When testing the LT 6403 and LT 9403, ensure that the speaker under test is in BIAMP mode for the following tests. You can verify that the speaker is set up to operate in BI-AMP mode by checking the window on the input panel. Refer to the procedure in the back of this manual to change from PASSIVE to BI-AMP mode.

Speakon® NL4FX connector

16-18AWG  twisted pair wire

Neutrik Speakon 

4 pole connector (back shown)

Speaker Test Cable

GND

Dual banana jack

Test Procedures

1. Woofer Phase Test

1.1 Remove the back panel of the speaker

using the disassembly procedures.

1.2 Disconnect the connectors at the woofer input terminals. Momentarily apply 8 Vdc + 1 Vdc to the terminals, observing polarity when connecting the DC P/S. The woofer should move outward when the DC level is applied.

2. V2 Assembly Drivers Phase Test

2.1 Remove the back panel of the speaker

using the disassembly procedures.

2.1 Disconnect the connectors at the V2 driver assembly input terminals. Momentarily apply 8 Vdc + 1 Vdc to the terminals, observing polarity when connecting the DC power supply. The V2 drivers should move outward when the DC level is applied.

4. High Frequency Power Sweep Test

4.1 Apply a 3 Vrms, 1.0 kHz signal to the

speaker input terminals.

4.2 Sweep the input frequency from 1.0 kHz to 5 kHz.

4.3 Listen for any buzzes, rattles or other extraneous noises from the loudspeaker.

5. Passive Operation Rub and Tick Test

Note: This test does not apply to the

LT 6400 or LT 9400 speakers.

5.1 Remove the input panel, and move the jumpered connector from the BI-AMP to the PASSIVE position. Re-install the input panel.

5.2 Apply a 20 Vrms, 10 Hz signal to the speaker input terminals.

2. Rub and Tick Test

2.1 Apply a 20 Vrms, 10 Hz signal to the

input terminals of the speaker.

2.2 No extraneous noise such as rubbing, scraping or ticking should be heard. Ensure that there is no buzz from the loudspeaker grille.

3. Low Frequency Power Sweep Test

3.1 Apply an 8 Vrms, 10 Hz signal to the

speaker input terminals.

3.2 Sweep the input frequency from 10 Hz to 2 kHz.

3.3 Lower the applied input to 3 Vrms, and sweep the input frequency from 2 kHz to 5 kHz.

5.3 Sweep the input frequency from 10 Hz to 2 kHz.

5.4 Lower the applied input to 3 Vrms, and sweep the input frequency from 2 kHz to 5 kHz.

5.5 Listen for any buzzes, rattles or other extraneous noises from the loudspeaker.

6. Air Leak Test

6.1 Apply a 20 Vrms, 50 Hz signal to the

speaker input terminals.

6.2 Listen for any air leaks around the rear panel, input panel, waveguide and handles. Pass any speaker that has no air leaks. Fail any speaker that has air leaks. All repairs must not be visible at a distance of 3 feet.

3.4 Listen for any buzzes, rattles or other extraneous noises from the loudspeaker.

Figure 9. Input Board Layout Diagram

LT 6403 and LT 9403 Crossover Board Layout Diagram

The LT 6403 and LT 9403 loudspeakers both use the same bare board for their crossover assemblies. The only differences are the components populating the board. See the table below.

Reference Designator LT 6403 Crossover PCB

Component Values

Capacitors

C1 40uF / 250V 40uF / 250V C2 10uF / 200V 4.7uF / 200V C3 40uF / 200V 40uF / 200V C4 60uF / 200V Jumper C5 4.7uF / 100V 4.7uF / 100V C6 3.9uF / 100V 3.9uF / 100V C7 20uF / 100V 20uF / 100V C8 20uF / 100V 20uF / 200V C9 5uF / 100V 5uF / 200V Inductors L1 6mh / 0.8 Ohms 6mh / 0.8 Ohms L2 9mh / 1.1 Ohms 32mh / 1.6 Ohms L3 .68mh / 0.7 Ohms .68mh / 0.7 Ohms L4 .27mh / 0.4 Ohms .27mh / 0.4 Ohms L5 1.2mh / 0.3 Ohms Jumper L6 .68mh / 0.6 Ohms .68mh / 0.6 Ohms L7 .82mh / 0.7 Ohms .82mh / 0.7 Ohms L8 .56mh / 0.6 Ohms .56mh / 0.6 Ohms Resistors R1 10 Ohm / 15 Watt Jumper R2 20 Ohm / 15 Watt 4 Ohm / 15 Watt R3 10 Ohm / 15 Watt 20 Ohm / 15 Watt

LT 9403 Crossover PCB

Component Values

LT 6400 and LT 9400 Crossover Board Layout Diagram

The LT 6400 and LT 9400 loudspeakers both use the same bare board for their crossover assemblies. The only differences are the components populating the board. See the table below.

Reference Designator LT 6400 Crossover PCB

Component Values

Capacitors

C1 Not used Not used C2 Not used Not used C3 40uF / 200V 40uF / 200V C4 Not used Not used C5 4.7uF / 100V 4.7uF / 100V C6 3.9uF / 100V 3.9uF / 100V C7 20uF / 100V 20uF / 100V C8 20uF / 100V 20uF / 200V C9 5uF / 100V 5uF / 200V Inductors L1 Not used Not used L2 Not used Not used L3 .68mh / 0.7 Ohms .68mh / 0.7 Ohms L4 .27mh / 0.4 Ohms .27mh / 0.4 Ohms L5 Not used Not used L6 .68mh / 0.6 Ohms .68mh / 0.6 Ohms L7 .82mh / 0.7 Ohms .82mh / 0.7 Ohms L8 .56mh / 0.6 Ohms .56mh / 0.6 Ohms Resistors R1 Not used Not used R2 20 Ohm / 15 Watt 4 Ohm / 15 Watt R3 10 Ohm / 15 Watt 20 Ohm / 15 Watt R4 1 Ohm / 15 Watt Not used

LT 9400 Crossover PCB

Component Values

LT 6403 and LT 9403 Crossover Wiring Diagrams

LT 6400 Mid/High Loudspeaker Crossover Wiring Diagram

LT 9400 Mid/High Loudspeaker Crossover Wiring Diagram

LT 6403 and LT 9403 Passive or Bi-amp Loudspeaker Configuration

Note: The procedure below does not apply to the Panaray® LT 6400 and LT 9400 speakers.

The LT 6403 and LT 9403 loudspeaker's configuration can be changed internally to operate in either passive or bi-amped mode by changing the position of a jumpered plug on the input panel PCB. You simply move the jumpered plug from one board connector to another. Refer to the steps below.

1. Remove the rear connector plate.

2. Remove the connector from the passive position.

3. Place in the Bi-amped position.

Rotating the Waveguide

The waveguide assemblies on the LT 6403, LT 9403, LT 6400 and LT 9400 loudspeakers can be rotated 90 degrees to allow the speaker to be mounted either vertically or horizontally. Refer to the steps below. Note: The LT 6400 and LT 9400 do not have woofer chambers as shown in the diagrams below.

1. Remove the grille

2. Remove the waveguide

3. Rotate the waveguide

4. Re-install the grille

5. Rotate the logo

High Frequency Compression Driver Replacement Procedure

1. Turn off the amplifier.

2. Disconnect the loudspeaker input connections.

3. Remove the high frequency compression driver from the cabinet using the appropriate disas-

sembly procedures in this service manual for either the Panaray® LT 6403/LT 9403 or LT 6400/ LT 9400 loudspeakers.

4. Once you have accesss to the driver, disconnect the BLUE (+) terminal and the BLACK (-) terminal of the t1.0hp driver.

5. Remove the 4 screws that connect the mounting plate to the compression driver.

6. Remove the 3 screws holding the compression driver assembly to the mounting plate.

7. Connect the new compression driver to the mounting plate using the 3 screws.

8. Insert the compression driver assembly into the rear of the loudspeaker cabinet and secure

with 4 screws.

9. Reconnect the BLUE wire to the positive (+) terminal and the BLACK wire to the negative (-) terminal.

10. Re-assemble the loudspeaker.

11. Reconnect the loudspeaker input connections.

12. Turn on the amplifier.

High Frequency Compression Driver Diaphragm Replacement Procedure

To remove the compression driver from the loudspeaker cabinet:

1. Select a clean, well lit work area that is free of magnetic materials that might be attracted to the magnet in the compression driver.

Note: Do not allow any dirt or dust to come into contact with the replacement diaphragm.

2. Carefully clean the outside of the compression driver with a damp cloth.

3. Place the rear of the driver facing up.

4. Remove screws and remove the rear cover of the driver.

5. Gently lift the rear cover straight up. Set it down on its outside to keep the inside clean.

6. Remove the diaphragm assembly by gently lifting and rotating it.

High Frequency Compression Driver Diaphragm Replacement Procedure (cont.)

7. Examine the gap in which the coil of the diaphragm sits by completing the following steps:

A. Gently insert one end of a piece of clean paper (approximately 1" x 1.2") into the gap.

B. Slowly work the paper into the gap.

C. Move the paper around the perimeter of the gap.

Note: You should not feel any debris or obstructions with the paper. If there is debris, use a piece of masking tape to remove. Fold the tape so that both sides have the adhesive backing on the outside. Insert the tape into the gap and work it into and around the gap, removing any debris.

D. When the gap is clean, check once again with a clean piece of paper.

Note: If the gap is still not clean, do not install the replacement diaphragm but instead replace the entire compression driver.

8. Once the gap is clean, make sure that there is no debris on the front plate. The front plate may have some small smudges from fingerprints, but there should be no debris (from a shattered aluminum diaphragm or any other source) and it should feel smooth to the touch with no pits in the metal.

9. Remove the replacement diaphragm from its carton.

10. Grasp the diaphragm assembly around its edges and gently place it onto the front of the

compression driver assembly. Do not press down on the diaphragm assembly as this could cause the coil on the underside of the diaphragm assembly to be crushed against the front of the compression driver assembly.

11. Slowly and gently rotate the diaphragm assembly so that the coil is worked into the the gap in the front of the compression driver. The screw holes in the diaphragm can be visually lined up with the screw holes in the front of the compression driver assembly to help center the coil into the gap.

12. Align the holes in the diaphragm assembly with the holes in the front of the compression driver assembly.

13. Replace the rear cover by aligning the screws holes and securing it with the screws.

14. Sweep the driver with a sine wave from 300Hz to 1kHz and listen for buzzing. If you hear any

buzzing, readjust the diaphragm or clean the gap again. Dirt and/or misalignment of the diaphragm causes buzzing. Once you have cleaned and/or adjusted the gap, continue sweeping the driver until you do not hear any buzzing. Once you no longer hear any buzzing, the driver is ready to be installed and used.

Accessories Used With the Panaray® LT Loudspeakers

Panaray Digital Controller

The Panaray System Digital Controller has a universal power suppy for worldwide use. Variants of the product refer to the AC cord included with the product. There are five variations.

Region Variation Product Code

North America 028021 Europe 028022 United Kingdom 028023 Australia 028024 Japan 028025

Panaray EQ Cards

Active equalization for the Panaray LT loudspeakers can be provided by using the active EQ card for that loudspeaker as listed in the table below, or the Panaray system digital controller with presets for each Panaray speaker and combination of speakers.

Note: There are no discrete EQ cards available for the Panaray LT 6403 / LT 9403 or LT 6400 / LT 9400 Loudspeakers. You would use either a Panaray Digital Controller or a parametric equalizer with the appropriate high-pass and low-pass filters. Refer to the EQ curves in the specifications section of this manual.

Speaker Product Code

Panaray LT 3202® III EQ Card 011502 Panaray LT 4402® III EQ Card 011504 Panaray LT 9402TM III EQ Card 035325 Panaray LT 9702® III EQ Card 017929 Panaray LT MB24 III 028666

Service Manual Revision History

Date Revision

Level

6/05 00 Document released at revision 00. Service manual

4/06 01 - Added LT 6400 and LT 9400 loudspeaker

information

- Added LT 6403 and LT 9403 white variant information

9/06 02 Added RoHS compliant parts information RoHS initiative Main

Description of Change Change Driven

release

New product

release

Pages

Affected

Various

part lists

All

Panaray® LT 6403 and LT 9403

Full Range Loudspeakers

Panaray LT 6400 and LT 9400

Mid/High Frequency Loudspeakers

Service Manual

Reference Number 285327-SM Rev. 02

SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE

Bose Corporation The Mountain Framingham Massachusetts USA 01701

Reference Number 285327-SM Rev. 02 9/2006 (P) http://serviceops.bose.com

BOSE PANARAY LT 6403, PANARAY LT 9403, PANARAY LT 6400 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual