Bose Panaray LT MB12 III Service Manual Download Page 20

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DISASSEMBLY PROCEDURES

Model 9702

®

 

III

 Loudspeaker

Note: Refer to Figure 10 for the following
procedures.

1. Grille Removal

1.1 Remove the fourteen screws (2) that
secure the grille assembly (1) to the cabinet.

1.2 Lift the grille assembly off of the cabinet.
The gasket should remain adhered to the
cabinet.

2. Logo Removal

2.1 Remove the grille using procedure 1
above.

2.2 On the back of the grille, carefully re-
move 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.

2.3 Lift the logo off of the grille.

3. VEE Two Assembly Removal

3.1 Remove the four screws that secure the
assembly to the cabinet. These screws are
located at the four corners of the VEE Two
assembly. Do not remove the other screws
around the casting. Carefully lift the assem-
bly out of the cabinet. Make a note of the
wiring configuration, and disconnect the two
wires from the connector.

4. Input Panel Assembly Removal

4.1 Remove the four screws that secure the
input panel assembly to the cabinet. Discon-
nect the cables that plug into the PCB. Lift
out the assembly.

VEE Two Driver Removal Procedure

1. Remove the VEE Two assembly using the
appropriate disassembly procedures for the
speaker under repair.

2. Place the VEE Two assembly on a flat
surface so that the aluminum casting with
the Bose logo is facing upward.

3. Using a Phillips-head screwdriver, remove
all of the screws around the perimeter of the
casting. Carefully lift off the casting. The
drivers will be exposed.

4. Make a note of the wiring configuration,
and cut the wires as close to the terminals
as possible.

5. Remove the three screws that secure the
driver into the housing. Lift it out of the
housing.

Re-assembly note: When installing the
new driver, ensure that the gasket for the
driver and the gasket for the aluminum
casting are correctly positioned to provide
an airtight seal after re-assembly.

Model MB24 and MB12 

III 

Bass Loud-

speakers

Refer to Figure 11 or 12, as appropriate,
for the following procedures.

1. Grille Removal

1.1 Using a Phillips-head screwdriver, re-
move the screws that secure the grille to the
enclosure. Lift off the grille.

2. Driver Removal

2.1 Perform procedure 1 above.

2.2 Using a Phillips-head screwdriver, re-
move the 8 screws that secure the driver to
the enclosure.

2.3 Lift the driver out of the enclosure. Make
a note of the wiring configuration and cut the
wires as close to the terminals as possible.

Re-assembly Note: Be sure that the driver
gasket is properly aligned to provide an
airtight seal. If the gasket is damaged, use a
new one.

Summary of Contents for Panaray LT MB12 III

Page 1: ...2006 Bose Corporation Reference Number 275484 SM Rev 03 Service Manual Panaray LT Model 3202 III 4402 III 9402TM III 9702 III MB24 III and MB12 III Loudspeakers...

Page 2: ...kaging View 9 Packing List Panaray LT MB24 III Bass Loudspeaker 10 Figure 5 Panaray LT MB24 III Bass Loudspeaker Packaging View 10 Packing List Panaray LT MB12 III Bass Loudspeaker 11 Figure 6 Panaray...

Page 3: ...eaker 9702 III 123 5 lbs 56 kg 9402 III 145 5 lbs 66 kg 4402 III 141 1 lbs 64 kg 3202 III 240 7 lbs 109 kg MB24 III 147 0 lbs 67 kg MB12 III 74 lbs 34 kg ELECTRICAL Driver Complement 9702 III Mid Freq...

Page 4: ...I 180Hz 16kHz 3dB 3202 III 200Hz 16kHz 3dB MB24 III 40Hz 250Hz 3dB MB12 III 40Hz 250Hz 3dB Loudspeaker Impedance Compression Driver 8 Ohms Vee Two 2 Vee Two s are wired in series for 8 Ohms MB24 III B...

Page 5: ...d two or more V2 assemblies for midrange The MB24 bass module contains two 12 inch bass drivers The MB12 bass module contains one 12 bass driver The Panaray LT Series III loudspeakers come standard wi...

Page 6: ...II includes 276855 1 1 PP Cover LT3202 III 5 104 2 4 2 Triangle Paper LT3202 III 5 102 2 4 3 PP Foam Middle LT3202 III 5 106 1 4 4 Triangle Paper LT3202 III 5 101 2 4 5 Carton LT3202 III 5 107 1 4 6 L...

Page 7: ...l 4402 III includes 276856 1 1 PP Cover LT4402 III 5 103 2 4 2 Triangle Paper LT4402 III 5 102 2 4 3 PP Foam Middle LT4402 III 5 106 1 4 4 Triangle Paper LT4402 III 5 101 2 4 5 Carton LT4402 III 5 107...

Page 8: ...Note Kit Carton Model 9402 III includes 276857 1 1 PP Cover LT9402 III 5 105 2 4 2 Triangle Paper LT9402 III 5 101 2 4 3 PP Foam Middle LT9402 III 5 106 1 4 4 Carton LT9402 III 5 107 1 4 5 Loudspeaker...

Page 9: ...ote Kit Carton Model 9702 III includes 276858 1 1 PP Cover LT9702 III 5 104 2 4 2 Triangle Paper LT9702 III 5 101 2 4 3 PP Foam Middle LT9702 III 5 105 1 4 4 Carton LT9702 III 5 106 1 4 5 Loudspeaker...

Page 10: ...y Note Kit Carton Model MB24 III includes 1 1 PE Bag 1600 x 1160 x 0 1mm LTMB24 III 2 104 1 4 2 PE Bag 240 x 350 x 0 1mm LT9702 III 5 102 1 4 3 PP Foam 672 x 790 x 150mm LTMB24 III 2 103 2 4 PP Foam M...

Page 11: ...escription Bose Part Number Vendor Part Number Qty Note Kit Carton Model MB24 III includes 1 1 Paper Cover 774x636x107mm LTMB12 III 2 103 1 2 Cushioning Material 770x632x100mm LTMB12 III 2 102 2 3 Man...

Page 12: ...of 3 sections 274622 274622 1 4 8 Gasket Compression Driver 263911 263911 1 4 9 Disk Align Compression Driver 263912 263912 1 4 10 Screw KM4x12 10 4 11 Screw KM6x12 4 4 12 Plate Mount Compression Dri...

Page 13: ...Driver 263911 263911 1 4 5 Disk Alignment Compression Driver 263912 263912 1 4 6 Screw KM4x12 4 4 7 Screw KM6x12 4 4 8 Plate Mount Compression Driver 276849 276849 1 9 Screw TM6x30 14 4 10 Compression...

Page 14: ...Disk Alignment Comp Driver 263912 263912 1 4 10 Screw KM4x12 4 4 11 Screw KM6x12 4 4 12 Plate Mount Compression Driver 276849 276849 1 13 Screw TM6x30 14 4 14 Compression Driver 276860 276860 1 15 Ga...

Page 15: ...isk Alignment Comp Driver 263912 263912 1 4 10 Screw KM4x12 4 4 11 Screw KM6x12 4 4 12 Plate Mount Compression Driver 276849 276849 1 13 Screw TM6x30 14 4 14 Compression Driver 276860 276860 1 15 Gask...

Page 16: ...te Qty Note 1 Gasket Grille MB24 Bass Module 1 4 2 Grille Assembly includes screws logo tape fastener and spring 297514 298561 1 3 Logo Kit includes tape fastener and spring 276848 297505 1 4 Grille S...

Page 17: ...n Black White Qty Note 1 Gasket Grille MB12 Bass Module 1 4 2 Grille Screw Kit 14 screws 297502 297503 1 3 Grille Assembly includes screws and logo 296721 298588 1 4 Logo Kit includes tape fastener an...

Page 18: ...ression driver 3 3 Remove the four screws 11 that secure the compression driver to the mounting plate Lift off the driver 4 VEE Two Assembly Removal 4 1 Remove the four screws that secure the assembly...

Page 19: ...Lift the grille assembly off of the cabinet The gasket should remain adhered to the cabinet 2 Logo Removal 2 1 Remove the grille using procedure 1 above 2 2 On the back of the grille carefully re move...

Page 20: ...embly using the appropriate disassembly procedures for the speaker under repair 2 Place the VEE Two assembly on a flat surface so that the aluminum casting with the Bose logo is facing upward 3 Using...

Page 21: ...6 18AWG twisted pair wire Dual banana jack GND Model 3202 III Speaker Test Cable Panaray LT Model 3202 4402 9402TM and 9702 Series III Loudspeakers Note Ensure that the speaker under test is in PASSIV...

Page 22: ...craping or ticking should be heard 2 Phase Test 2 1 Disconnect the connectors at the driver terminals Momentarily apply 10 Vdc 1 Vdc to the terminals observing polarity when connecting the DC power su...

Page 23: ...3mm 4 5 4 5 4 5 4 5 8981 5 08mm4P Connector MID FREQENCY DRIVERS HIGH FREQUENCY DRIVER Model 4402 9402TM and 9702 Series III Wiring Diagram Loudspeaker Wiring Diagrams Model MB24 Series III Bass Loud...

Page 24: ...er as listed in the table below or the Panaray system digital controller with presets for each Panaray speaker and combination of speakers Speaker Product Code Panaray LT 3202 III EQ Card 011502 Panar...

Page 25: ...ean Blow any debris out of the gap with dry compressed air if available 5 Align the replacement diaphragm with the magnet assembly Carefully slide the voice coil into the gap of the magnet assembly Ta...

Page 26: ...ce manual initial release All 12 04 01 Packaging part number and exploded view changes Vendor 4 17 10 05 02 1 Added new compression driver and replacement diaphragm part numbers 2 Added new white vers...

Page 27: ...SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE Bose Corporation The Mountain Framingham Massachusetts USA 01701 Reference Number 275484 SM Rev 03 9 2006 P http serviceops bose com...

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