Bose FreeSpace 360 Manual del propietario

Part Number 181812-S7 Rev. 00

Supplement

FreeSpace®360 Surface and In-ground

Loudspeaker EQ Cards

CONTENTS

Electrostatic Discharge Sensitive (ESDS) Device Handling ........................................................ 3

Supplement Description.................................................................................................................. 3

Warranty Information ....................................................................................................................... 3

Theory of Operation......................................................................................................................... 4

Equalizer Card Curve Diagrams ..................................................................................................... 5

Figure 1. FreeSpace 360®Surface EQ Curve.................................................................................. 5

Figure 2. FreeSpace 360 In-Ground Soft Ground EQ Curve ........................................................... 5

Figure 3. FreeSpace 360 In-Ground Hard Ground EQ Curve.......................................................... 5

Test Procedures ............................................................................................................................ 6-7

Part List Notes.................................................................................................................................. 8

FreeSpace 360 EQ Card Part List .............................................................................................. 9-10

Packing List, FreeSpace 360 EQ card (see Figure 4).................................................................. 11

Figure 4. FreeSpace 360 EQ Card Packing View.......................................................................... 11

Figure 5. FreeSpace 360 Equalizer Board Topside and Etch Layout Diagram.............................. 12

Figure 6. FreeSpace 360 Equalizer Board SMD and Etch Layout Diagram .................................. 12

CAUTION: The FreeSpace 360 Equalizer Cards

contain no user serviceable parts. To prevent

warranty infractions, refer servicing to

warranty service centers 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.

(ESDS) DEVICE HANDLING

ELECTROSTATIC DISCHARGE SENSITIVE

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.

SUPPLEMENT DESCRIPTION

This supplement should be used along with the 1800V EQ PCB service manual part number

181812-S2. The disassembly/assembly procedures, and packing part list should be used along

with the information in this manual. The test procedures were included in this manual for your

convenience.

WARRANTY INFORMATION

The FreeSpace®Model 360 Loudspeaker Equalizer Cards are covered by a 5-year

transferable limited warranty.

THEORY OF OPERATION

These Equalizer cards are designed to be installed into the AmPlus™ 50 and 100 amplifiers

and the Bose®1600 Series VI and 1800 Series V/VI amplifiers.

The FreeSpace®360 loudspeaker requires equalization, and this equalization is a function of

the installation. There are two variants of the card that implement EQ curves for these

installation situations:

•In Ground (when the FreeSpace 360 loudspeaker is mounted in the ground).

The appropriate EQ curve for soft or hard ground is selected with a slide switch on the card.

When S1 is in the SOFT position, the Soft Ground EQ is used; when S1 is in the HARD

position, the Hard Ground EQ is used.

•In the Surface variant, S1 is omitted and jumpered to the SURFACE position.

Note: Refer to the FreeSpace 360 Surface or In-Ground schematic diagrams, as appropriate,

for the following explanation. The designators inside the brackets "[ ]" are the schematic grid

coordinates which are provided in order to make it easier to locate components on the

schematic sheet indicated in the description. Components shown on the schematic as

OPT (optional) are not used in that particular configuration.

The input signal is applied to these cards at JP1 pin 4. The first section at the input, U2-B [D7],

combines a first order high-pass filter with one section of a parametric cut filter. The parametric

is set for -15dB at 27Hz and provides a steep slope below about 80Hz. The equalization is

segmented, with one block (U2 and U1), all sections [D1-8] dedicated to bass region equaliza-

tion. Following the output of this section, U2-A [D1], the signal is presented to two parallel

equalization paths, one comprised of U3 [B4-7], U4-B [C3], and dedicated to EQ for mounting

in soft ground of the FreeSpace 360 loudspeaker. The other path, comprised of U5 [B4-7],

U4-A [B3] provides equalization for the FreeSpace 360 loudspeaker in hard ground installa-

tions. In the case of the FreeSpace Surface EQ card, the bottom leg of the equalizer card is

not used.

The operation of all three equalizers is similar. Considering the bass equalizer, we see U2-B's

[D7] output passed through R8 [D7] and into the non-inverting input of U2-A [D2]. This input is

extended as a bus to which EQ sections Bass 1 [D6] and Bass 2 [D5] are connected. These

will introduce dips into the audio response to provide bass cut as required. Sections Bass 3

[D4] and Bass 4 [D3] are connected to a bus extended from the inverting input of U2-A [D2]

and provide bass boost.

See Figures 1,2 and 3 for the EQ curves for the various equalizer cards.

Each of the EQ sections utilizes a gyrator-connected op-amp in conjunction with a series

capacitance to simulate an LCR series tuned circuit. The values of the capacitors and resistors

are chosen to implement EQ dips and/or peaks at the appropriate frequency, amplitude and Q

to realize the desired EQ curves. On the In-Ground EQ card, S1 [B2] selects either the HARD

or the SOFT mount EQ curve.

The output signal is taken from JP1 pin 5, and returns to the amplifier. The equalizer cards are

sensed by the amplifiers as follows. In the AmPlus 50 and 100 amplifiers, Pin 12 of J1 [B2] is

grounded and is sensed by the dynamic EQ circuit on sheet 2 of the AmPlus 50 and 100

schematic diagrams. In the 1600/1800 amplifiers, the input module detects the presence of EQ

cards via J7-6 and J6-6. Without the card installed these pins are pulled high (+15V). This logic

high signal is also applied to the control pins of the switch ICs which selects the A

(unequalized) input. When an EQ is plugged into J7 and/or J6 pin 6, the EQ is detected and

pulls the control pin low (+7.5V), turning on the corresponding LED(s) and switching the IC to

the B input which will then select the output of the EQ card to be passed on to the amplifier.

EQUALIZER CARD CURVE DIAGRAMS

Figure 1. FreeSpace® 360 Surface EQ Cur e

Figure 2. FreeSpace 360 In-Ground Soft Ground EQ Cur e

Figure 3. FreeSpace 360 In-Ground Hard Ground EQ Cur e

TEST PROCEDURES

1.7 Shut off the amplifier. Open the input

panel and switch the Hard/Soft switch to

the HARD position.

2. In Hard Ground Frequency

Response Test

2.1 Apply a 100 mVrms, 1kHz signal to the

input jack of the amplifier channel under

test.

2.2 Adjust the amplifier volume controls to

maximum. No EQ card installed.

2.3 Reference a dB meter to the output of

the amplifier.

2.4 Shut off the amplifier and insert the EQ

card according to the assembly procedure.

2.5 Turn on the amplifier and measure the

gain. There should be a -2.1 ±1.0 dB

change in gain at the output.

2.6 Reference a dB meter and measure

the response according to the In Hard

Ground Frequency Response chart.

FreeSpace®360 In-Ground Loudspeaker

Test Setup Parameters:

1. Install the Equalizer card under test into

one of the Equalizer card jacks located on

the Input Module of the Bose®1600 or

1800 Series amplifier, and perform the

following tests. Refer to the 1800V service

manual supplement part number 181812-

S2 for more information.

2. On the amplifier Input Module, place

switch SW1 to the NORM position. Place

switch S2 to the FULL BANDWIDTH

position.

3. The input voltage shall be the actual

input voltage present at the input, not the

open circuit generator input.

Note: Place the Hard/Soft switch S1 to the

SOFT position for the following tests.

1. In Soft Ground Equalizer PCB

Frequency Response Test

1.1 Apply a 100 mVrms, 1kHz signal to the

input jack of the amplifier channel under

test.

1.2 Adjust the amplifier volume controls to

maximum. No EQ card installed.

1.3 Reference a dB meter to the output of

the amplifier.

1.4 Shut off the amplifier and insert the EQ

card according to the assembly procedure.

1.5 Turn on the amplifier and measure the

gain. There should be a 0.0 ±1.0 dB

change in gain at the output.

1.6 Reference a dB meter and measure

the response of the EQ card according to

the In Soft Ground Frequency Response

chart.

In Soft Ground Frequency Response

Frequency Output Level

30 Hz -10.3 dB ±1.5 dB

180 Hz +9.5 dB ±1.5 dB

190 Hz +7.8 dB ±1.5 dB

1000 Hz Reference

3000 Hz +8.1 dB ±1.0 dB

4000 Hz +7.8 dB ±1.0 dB

10000 Hz +16.4 dB ±2.5 dB

In Hard Ground Frequency Response

Frequency Output Level

9 Hz +9.8 dB ±1.5 dB

30 Hz -8.3 dB ±1.5 dB

180 Hz +11.2 dB ±1.0 dB

800 Hz +0.8 dB ±1.0 dB

1000 Hz Reference

3000 Hz +8.1 dB ±1.0 dB

4000 Hz +8.7 dB ±1.0 dB

10000 Hz +18.2 dB ±2.5 dB

1.6 Reference a dB meter and measure

the response of the EQ card according to

the Surface Frequency Response chart.

2. Distortion Test

2.1 Apply a 780 mVrms, 1 kHz signal to the

input jack of the amplifier channel under

test.

2.2 Measure the distortion level at the

output of the amplifier. It should be ≤0.1%

THD.

TEST PROCEDURES

3. Distortion Test

3.1 Apply a 780 mVrms, 1 kHz signal to the

input jack of the amplifier channel under

test.

3.2 Measure the distortion level at the

output of the amplifier. It should be ≤0.1%

THD.

FreeSpace®360 Surface Loudspeaker

Test Setup Parameters

1. Install the Equalizer card under test into

one of the Equalizer card jacks located on

the Input Module of the Bose®1600 or

1800 Series amplifier, and perform the

following tests. Refer to the 1800V service

manual supplement part number 181812-

S2 for more information.

2. On the amplifier Input Module, place

switch SW1 to the NORM position. Place

switch S2 to the FULL BANDWIDTH

position.

3. The input voltage shall be the actual

input voltage present at the input, not the

open circuit generator input.

1. Surface Equalizer PCB Frequency

Response Test

1.1 Apply a 100 mVrms, 1kHz signal to the

input jack of the amplifier channel under

test.

1.2 Adjust the amplifier volume controls to

maximum. No EQ card installed.

1.3 Reference a dB meter to the output of

the amplifier.

1.4 Shut off the amplifier and insert the EQ

card according to the assembly procedure.

1.5 Turn on the amplifier and measure the

gain. There should be a +1.0 ±1.0 dB

change in gain at the output.

Surface Frequency Response

Frequency Output Level

30 Hz -8.8 dB ±1.5 dB

90 Hz +7.2 dB ±1.5 dB

180 Hz +11.0 dB ±1.5 dB

900 Hz +0.2 dB ±1.5 dB

1000 Hz Reference

2000 Hz +0.4 dB ±1.5 dB

5000 Hz +6.7 dB ±1.0 dB

10000 Hz +17.9 dB ±2.5 dB

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. These parts are used on the FreeSpace®360 in-ground EQ card only.

5. These parts are used on the FreeSpace 360 Surface EQ card only.

Resistors

FREESPACE®360 EQ CARD PART LIST

Capacitors

Reference

Designator Description Part Number Note

C2 .22uF, BOX, 85, 50V, 5% 137127-224

C5, 56 390pF, MONO, COG, 50V, 5% 140564-391

C6 .018uF, BOX, 85, 100V, 5% 137127-183

C7 .0068uF, BOX, 85, 100V, 5% 137127-682 5

C7, 57, 87 .0068uF, BOX, 85, 100V, 5% 137127-682 4

C8 .047uF, BOX, 85, 63V, 5% 137127-473

C9, 10 .47uF, BOX, 85, 50V, 5% 137127-474 5

C11 .0015uF, BOX, 85, 100V, 5% 137127-152 4

C11 820pF, MONO, COG, 50V, 5% 140564-821 5

C12 .015uF, BOX, 85, 100V, 5% 137127-153 4

C12 .056uF, BOX, 85, 63V, 5% 137127-563 5

C13 .0018uF, BOX, 85, 100V, 5% 137127-182 5

C13, 81, 82 .022uF, BOX, 85, 100V, 5% 137127-223 4

C14 .0027uF, BOX, 85, 100V, 5% 137127-272 4

C14, 16 .001uF, BOX, 85, 100V, 5% 137127-102 5

C15, 51 .033uF, BOX, 85, 63V, 5% 137127-333

C16 .01uF, BOX, 85, 100V, 5% 137127-103 4

C17 18PF, 0805, 50V, 5% 133622-180 5

C50, 58, 88 .0056uF, BOX, 85, 100V, 5% 137127-562 4

C50, 61 .0033uF, BOX, 85, 100V, 5% 137127-332 5

Reference

Designator Description Part Number Note

R1 2.00KΩ, CHIP, 0805, 1% 133625-2001

R2, 5, 12, 17,

18, 24, 26, 28,

30, 59, 64, 83,

JUMPER, CHIP, 0805 133627 4

R2, 5, 12, 17,

18, 23, 26, 59,

JUMPER, CHIP, 0805 133627 5

R3 18.2KΩ, CHIP, 0805, 1% 133625-1822

R4 1.50KΩ, 0805, 1/10W, 1% 133625-1501 5

R4 2.21KΩ, CHIP, 0805, 1/10W, 1% 133625-2211 4

R8, 21 200KΩ, 0805, 1/10W, 1% 133625-2003

R9, 10, 19, 20 392KΩ, 0805, 1/10W, 1% 133625-3923 5

R13, 14 28.7KΩ, 0805, 1/10W, 1% 133625-2872

R15, 16 127KΩ, 0805, 1/10W, 1% 133625-1273

R19, 20 169KΩ, 0805, 1/10W, 1% 133625-1693 4

R50, 63, 80, 93 24.9KΩ, CHIP, 0805, 1% 133625-2492

R51, 52 16.5KΩ, CHIP, 0805, 1% 133625-1652 5

R55, 56 10.0KΩ, CHIP, 0805, 1% 133625-1002 5

R55, 56 47.5KΩ, CHIP, 0805, 1% 133625-4752 4

R57, 58 5.76KΩ, CHIP, 0805, 1% 133625-5761 5

R57, 58, 87, 88 6.81KΩ, CHIP, 0805, 1% 133625-6811

R61, 62, 91, 92 4.87KΩ, CHIP, 0805, 1% 133625-4871 4

R81, 82, 51, 52 8.25KΩ, CHIP, 0805, 1/10W, 1% 133625-8251

R85, 86 66.5KΩ, 0805, 1/10W, 1% 133625-6652 4

R94 100Ω, CHIP, 0805, 1% 133625-1000

FREESPACE®360 EQ CARD PART LIST

Capacitors

Integrated Circuits

Reference

Designator Description Part Number Note

U1, 3, 5 0P AMP QUAD, SOIC-14, NJM2059 187472 4

U2, 4 OP AMP DUAL, SOIC-8, NJM4559 187473

Miscellaneous

Reference

Designator Description Part Number Note

C52 .068uF, BOX, 85, 63V, 5% 137127-683 4

C52, 60 .0047uF, BOX, 85, 100V, 5% 137127-472 5

C53 .0056uF, BOX, 85, 100V, 5% 137127-562 5

C53 270pF, MONO, COG, 50V, 5% 140564-271 4

C54 .0039uF, BOX, 85, 100V, 5% 137127-392 4

C54, 57, 58 .0082uF, BOX, 85, 100V, 5% 137127-822 5

C55 .0027uF, BOX, 85, 100V, 5% 137127-272 5

C56, 86 330pF, MONO, COG, 50V, 5% 140564-331 4

C59 560pF, MONO, COG, 50V, 5% 140564-561

C59, 89 560pF, MONO, COG, 50V, 5% 140564-561 4

C60, 90 .0047uF, BOX, 85, 100V, 5% 137127-472 4

C61, 91 .0033uF, BOX, 85, 100V, 5% 137127-332 4

C62, 92 68pF, 0805, COG, 50V, 5% 133622-680 5

C80 .0082uF, BOX, 85, 100V, 5% 137127-822 4

C83 220pF, MONO, 5% 140564-221 4

C84 .0022uF, BOX, 85, 100V, 5% 137127-222 4

C85 820pF, MONO, COG, 50V, 5% 140564-821 4

C98, 99 .1uF, 1206, Z5U, 50V, 20% 124958-1041 5

C100, 101, 102,

103, 104, 105,

106, 107, 108,

109

.022uF, 0805, X7R, 50V, 10% 133623-223 4

Reference

Designator Description Part Number Note

JP1 CONN, HEADER, 12 PIN 149538

S1 JUMPER, CHIP 0805 133627 5

S1 SPDT, VERTICAL, SLIDE 187481 4

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