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Table of Contents
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING.................................................... 2 SAFETY INFORMATION ................................................................................................................................... 3 IDENTIFICATION OF UNIT UNDER TEST ....................................................................................................... 4 SPECIFICATIONS ............................................................................................................................................. 5 THEORY OF OPERATION ................................................................................................................................ 7 DISASSEMBLY/ASSEMBLY PROCEDURES................................................................................................. 11 Main Assembly Procedures ....................................................................................................................... 11 Figure 1. Main Disassembly/Assembly Exploded View ............................................................................. 12 Flush-Mount Loudspeaker Procedures ..................................................................................................... 15 Figure 2. Flush-Mount Loudspeaker Exploded View ................................................................................. 16 Surface-Mount Loudspeaker Procedures .................................................................................................. 16 Figure 3. Surface-mount Loudspeaker ...................................................................................................... 17 TEST PROCEDURES..................................................................................................................................... 18 Main Assembly Test Procedures................................................................................................................ 18 Loudspeaker Test Procedures ................................................................................................................... 20 PART LISTS AND EXPLODED VIEWS........................................................................................................... 21 Main Assembly Part List (Figure 4) ............................................................................................................ 22 Figure 4. Main Assembly Exploded View................................................................................................... 23 Remote Assembly Part List (Figure 5) ....................................................................................................... 24 Figure 5. Remote Assembly Exploded View .............................................................................................. 24 Main Assembly Packaging Part List (Figure 5) .......................................................................................... 25 Figure 6. Main Assembly Packaging Exploded View ................................................................................. 26 Flush-mount Assembly Part List ................................................................................................................ 27 Figure 7. Flush-mount Exploded View ....................................................................................................... 27 Flush-mount Packaging Part List ............................................................................................................... 28 Figure 8. Flush-mount Loudspeaker Packaging Illustration........................................................................28 Surface-mount Assembly Part List ............................................................................................................ 29 Figure 9. Surface-mount Loudspeaker Illustration ..................................................................................... 29 Surface-Mount Packaging Part List ........................................................................................................... 30 Figure 10. Surface-mount Loudspeaker Packaging .................................................................................. 30 FreeSpace®6 Electrical Part List, PCB P/N 177300, Revision 0 .............................................................. 31 FreeSpace 6 Electrical Part List, PCB P/N 177300, Revision 1 .............................................................. 40 SCHEMATICS AND PCB LAYOUTS............................................................................................................... 49 Sheet 1, PCB IO1 Music Inputs (PCB 177300, Revisions 0 and 1) .......................................................... 50 Sheet 2, PCB IO1 Music Compressor (PCB 177300, Revisions 0 and 1) ................................................. 51 Sheet 3, PCB IO1 Board Page Processor (PCB 177300, Revisions 0 and 1) .......................................... 52 Sheet 4, PCB IO1 Board Music/Page Mixing (PCB 177300, Revisions 0 and 1) ...................................... 53 Sheet 5, PCB IO2 Board Line Outputs (PCB 177300, Revisions 0 and 1) ................................................ 54 Sheet 6, PCB IO2 Board Remote Volume (PCB 177300, Revisions 0 and 1) .......................................... 55 Sheet 7, PCB IO2 Tone Control and Surface EQ (PCB 177300, Revisions 0 and 1) ................................ 56 Sheet 8, PA Board Dynamic EQ and Limiter Processor (PCB 177300, Revisions 0 and 1) ...................... 57 Sheet 9, PA Board Speaker EQ (PCB 177300, Revisions 0 and 1) .......................................................... 58 Sheet 10, PA Board Power Supply and Amp(PCB 177300, Revisions 0 and 1) ....................................... 59 Sheet 11, Remote Board (PCB 177300, Revisions 0 and 1) ..................................................................... 60

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ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING
This unit contains ESD sensitive devices. We recommend the following precautions when repairing, replacing or transporting ESD sensitive 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.

CAUTION: THE FREESPACE®6 BUSINESS MUSIC SYSTEM CONTAINS NO USER-SERVICEABLE PARTS. TO PREVENT 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.

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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. Perform 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) 1492 (71). 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 milliampere. 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 the exposed metallic part has a return path to the chassis, the reading should be between 1 and 5.2 Megohms. When there is no return path to the chassis, the reading must be "infinite". 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.

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IDENTIFICATION OF UNIT UNDER TEST
When servicing a FreeSpace®6 take notice of the following attributes: · PC Board Part Number · Revision Level Number of the PC Board · Unit's Voltage Variation Type (100V,120V, 220V, 240V). There are two types of FreeSpace 6 units manufactured. If the unit you are servicing has a switch denoted by surface/flush mount speaker icons in block 12 of the front panel, then you have a 2 EQ unit. If not, then you have a 1 EQ unit. The EQ changes are represented on page 56 (Sheet 7, PCB Tone Control and Surface EQ) of this manual. The 2 EQ unit will have all optional components (OPT) populated on the I02 board. The 1 EQ unit will be depopulated.

Refer to the applicable part list and schematics as follows: · There are two Electrical Part Lists, one for Revision 0 and one for Revision 1 of PCB 177300. · The PCB Schematics and Layout views supplied with this service manual are applicable for Revisions 0 and 1 of PCB 177300. NOTE: The PC board revision level number is marked on the PC board as follows:

1

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SPECIFICATIONS
Dimensions Module Flush-mount Speaker Assembly: Surface-mount Speaker Assembly: Weight Module: Flush-mount Speaker Only: (Including Mounting Hardware): Surface-mount Speaker (Including Mounting Hardware): Flush-mount & Surface-mount Speaker: Flush-mount & Surface-mount Speaker: 4.0" H x 7.5" W x 15.0" D (10.16 x 19.05 x 38.10 cm) Flange Dia.: 6.25" (15.9 cm) Hole Dia.: 5.75" (14.6 cm) Depth: 6.5" (16.5 cm) 3.3" H x 7.6" W x 6.4" D (8.3 x 19.3 x 16.33 cm) 11.3 lb. (5.14 kg.) 2.1 lb. (.97 kg) 4.2 lb. (1.9 kg) 2.5 lb. (1.2 kg) 2.5" Full-range Driver 150° @ -6 dB

Driver Beamwidth

Performance Specifications
Input Sensitivity Power Output Power Requirements Remote Volume Control Value Music Input Impedance Channel A: Balanced: Channel A: Unbalanced: Channel B: Unbalanced: Balanced: Unbalanced: Music Input: Page Input: 200mV 200µV 16W into 2 load 120V or 220-240V ~ 50/60 Hz 10k, Audio taper 32k 11k 10k 9k 1k 400 0dB to 80dB adjustable 80Hz - 16kHz (line into loudspeaker outputs): 20Hz - 20kHz bandwidth; -65dBV at 20dB gain into 10k load 20Hz - 20kHz, ±1dB, referenced to 1kHz at line outputs

Page Input Impedance Page and Line Output Impedance Page Gain Frequency Range Noise Frequency Response

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Performance Specifications (Continued)
Maximum Acoustic Output Opti-voice ® Paging Circuitry 82dB-SPL in 20,000 cubic feet room with a speech band RT60 of 0.5 secs Ensures a constant paging level over a 30dB dynamic range by compressing the page signal. Music gradually returns to original level after page.

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THEORY OF OPERATION
1. OVERVIEW The FreeSpace®6 business music system delivers high-fidelity music and paging in commercial environments. The FreeSpace 6 components have been engineered to work together as a system. The electronics have separate compressors for music and paging sources that decrease the dynamic range of the audio signal, thereby increasing the audibility of musical passages and paging anouncements. A protective compressor in the power amplifier prevents audible overload distortion if the user attempts to play the system too loud.The system has the following features: · High-fidelity sound over a large area · Active equalization, music compression, and system overload protection · Opti-voice® circuitry for high quality paging capability · Remote control of volume and source selection The circuit descriptions that follow are grouped according to the PCB section and sheet number of the schematic. 2. IO1 PCB 2.1 IO1 PCB Schematic Sheet 1 Music Input A is routed through a differential input amplifier (U4) which accepts balanced sources or unbalanced sources. The amplifier output is passed through a gain trim pot and presented to the Music A/B selector. Music Input B is fed directly to a gain trim pot and then to the Music Input A/B selector. Music Selector A/B is a 2P2T analog switch, implemented with a special switching op amp (U11,U12)). The op amp is controlled by the signal SELECTB. The Music Selector Interface is a two transistor circuit that normally selects Music Input A. With the Remote Selector switch open, transistor Q2 is on, which turns on D4, the Source A LED, pulling SELECTB low. This turns off Q1, keeping its LED off. When the Remote Selector switch is closed, Q2 is turned off, allowing Q1 and D3 (the Music B LED) to turn on. This moves SELECTB high and turns off the Source A LED. When SELECTB is high, current is no longer sunk from U11 and U12's SW pin, and they select Music Input B. 2.2 IO1 PCB Schematic Sheet 2 On their way to the compressor, the left and right music signals pass through a stereo/mono switch, S1. After the compressor (U7 and part of U6), the music signals leave this sheet. The compressor is enabled by a logical function of SELECTB, Music Compressor A, and Music Compressor B enable switches. The logic (U8) determines that the compressor will be enabled only for a music source if that source is the one currently selected and if it has been enabled for compression via its switch (S2 or S3). The compressor offers a maximum gain of about 20dB for very low level signals and operates at a 2:1 slope. It slowly raises the level of quiet musical passages, and quickly reduces the level of loud passages. The two channels are cross coupled to maintain a centered stereo image. By selecting the rectifier input source as a DC current, the compressor is disabled (U9).

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The two sections of U15 are used to control a bi-colored Music-Compressor LED, D2. As long as the compressor is enabled, the LED glows green to indicate how active the compressor is. Whether or not the compressor is enabled, the LED is also acting as a watch dog and will flash red if the signal presented to the music compressor is too great for it to handle. 2.3 IO1 PCB Schmatic Sheet 3 The Page Input is presented to a differential amplifier (U2) that can handle a wide range of source voltages, as well as balanced or unbalanced sources. S5 determines the gain of the first stage (0dB or 30dB). The page signal next passes through U2, where it can be given a gain of 0 to 30dB, as determined by R1. At S4, the page signal is routed either through another variable gain stage (U2, gain adjustable from 0 to 20dB), or through the Opti-voice ® compressor. The Opti-voice compressor (U5 and part of U6) provides anywhere from 20dB of gain to 10dB of loss, depending upon the signal level. Finally, the output of S4 is passed through the Page Muting stage (part of U10, Q3, and Q4), in which it is muted unless the page trigger circuits have detected a signal. The Page Output connector (J2) is driven by part of U10, acting as a buffer stage. The two sections of U3 are used to control a bi-colored Opti-voice Compressor LED, D5. As long as the compressor is enabled; the LED glows green to indicate how active the compressor is. Whether or not the compressor is enabled, the LED is also acting as a watch dog and will flash red if the signals at U2's outputs are too great for the compressor to handle. 2.4 IO1 PCB Schematic Sheet 4 The Page Trigger circuits first offer a user sensitivity adjustment, via R3, then provide up to 26dB of gain for the trigger signal. V13, Section B acts as a threshold comparator and a peak hold circuit. For signals exceeding the threshold, the circuit changes state rapidly, and holds the new state long enough to ride through syllabic and inter-word pauses in paging. The two remaining sections of U13 provide a fade-back time constant for the music and adjust the control voltage levels to suit the muting transistors Q3,4,5,6 and 7. Two sections of U14 mix the music and page signals, while the other two sections of U14 provide the mono versions of the music signals and the music+page signals. Switch S9 enables paging in the signals fed on to the speaker outputs. R2 allows for adjustment of the page level relative to the music. 3. IO2 PCB 3.1 IO2 PCB Schematic Sheet 5 S7, the Line Output Mode switch, selects the signals sent on to U200 and the Line Outputs. Relay K1, controlled by Q201 and Q200, mute the Page and Line Outputs during power on and power off transitions to prevent glitches from reaching the outputs.

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3.2 IO2 PCB Schematic Sheet 6 The remote volume control function is implemented on this sheet with a dual VCA, IC U201, and its buffer, U202. (An alternate part could be used in U201A, but this is a manufacturing alternative, not a field service alternative.) U201 is controlled by a current sourced into the signal VCA, coming from Sheet 7. When VCA is about 2mk, gain is at its maximum, which is unity (0dB). When the current into VCA is zero, the gain is essentially off (-80dB or so). S4 and its related components are factory set gain trims. 3.3 IO2 PCB Schematic Sheet 7 Transistors Q202, Q203 and related components transform the variable resistance of the remote volume control into the current source that feeds signal VCA, on Sheet 6. U205 is a conventional bass and treble control, while U203 is an equalizer stage intended to provide the EQ adjustment needed when FreeSpace® 6 systems are configured with Surfacemount loudspeakers (as opposed to the Flush-mount FreeSpace 6 speakers). 4. Power Amplifier PCB 4.1 PA PCB Schematic Sheet 8 U301, part of U300, and U302 implement a acoustically correct low frequency compensation for more natural bass. The other two sections of U300 process the signal CD-DIA ("clipdetect-diagnostic", see Sheet 10) into a control signal that is sent through P2A, remote volume control circuit on Sheet 7 . CD-DIA becomes active when the power amplifiers are driven into clipping. This in turn causes the remote volume control circuit to be turned down so that clipping ceases. 4.2 PA PCB Schematic Sheet 9 U303 combines the low frequency compensation signal with the full range signals and then equalizes them to compensate for room acoustic and speaker driver characteristics. 4.3 PA PCB Schematic Sheet 10 U304 and U307 are power amplifiers with differential outputs. Both amplifier outputs can deliver 16 watts into the nominal 2 ohm load of a pair of FreeSpace 6 speakers. The CD-DIA pins are pulled low when the amplifiers begin to clip. This is used to control a compressor implemented on Sheet 9 and Sheet 7. D306 develops the DC power supply for the power amplifier. Q305 and associated components constitute a shunt voltage regulator which only conducts in the unlikely event of both a high power line voltage and a low or no signal output case. It holds 18V maximum which is presented to U304 and U307. D305, U305, and U306 are the +/-15V supply for all the circuits except for the power amplifier. The power transformer secondary plug can be inserted two ways; one way will handle a nominal 120VAC main, the other a nominal 240VAC main. The two orientations of this plug are noted on the PCB.
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5. Remote PCB REM PCB Schematic Sheet 11 The circuits on this sheet are contained on a small PC board inside the remote control. The potentiometer is wired as a 10K ohm rheostat and controls the remote volume control circuits on Sheet 6, while the SPST switch controls the Music Selector on Sheet 1.

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DISASSEMBLY/ASSEMBLY PROCEDURES
Main Assembly Procedures
Note: Certain parts will be referred to in these procedures. The numbers in parentheses represent individual parts called out in Figure 1. The callout numbers correspond to those on the part lists. 1. Chassis Cover/Top Cover Removal 1.1 Place the amplifier flat on the workbench with the Bose ® logo in the upper-left corner. 1.2 Detach the chassis cover (1) by holding both corners and pulling upward. Once the cover is loosened, slide the bottom tabs out and away from the unit. 1.3 Use a phillips-head screwdriver to remove two silver screws (2) securing the chassis top cover (3). 1.4 Gently lift the right side of the chassis top cover up at a 45° angle and pull to the right and up. This is done to clear the left screw mount away from the Amp PCB (8) when the cover is lifted off. IMPORTANT: Be careful not to pull the three cables connected to the Amp PCB (8) assembly. They must be disconnected before final removal of the chassis-top cover. 2. Chassis Cover/Top Cover Replacement 2.1 Place the chassis-top cover (3) over the chassis base (4). Align the cover so that the left-side screw mount of the chassis base will slide between the IO1 PCB (8) and the inside surface of the chassis-top cover. Otherwise there will be difficulty securing the cover. 2.2 Align the screw holes of the top cover with the screw mounts located on the base. Also align the four metal tabs on the base with the tab slots on the cover. There are also six metal tabs located on the bottom edges of the cover that must be aligned when the cover is finally seated. 2.3 Slide the cover down over the base until the screw holes are aligned and all tab slots are locked into place. 2.4 Secure the chassis top cover (3) by tightening two silver screws (2) with a phillips-head screwdriver. 2.5 Position the three bottom tabs on the chassis cover into the slots located in the chassis base. Press the chassis cover down over the chasis-top cover to secure it. 3. Amplifier PCB Removal (Chassis Base) 3.1 Remove the Chassis Cover/ Top Cover (Procedure 1) . 3.2 Separate the chassis-top cover from the base by disconnecting both two-pin cables from the Amp PCB's (8) P3A and P3B connectors. Disconnect the eight-pin cable from the Amp PCB's P2A connector. 3.3 Disconnect the following cables: · Disconnect the transformer's five-pin primary cable from the Amp PCB's P7 connector. · Disconnect the transformer's five-pin primary cable from the Amp PCB's P4 connector. · Disconnect the main power two-pin primary cable from the Amp PCB's P4 connector. IMPORTANT: Be sure to notice the orientation of the transformer's five-pin primary cable. Pin 1 is keyed to pin 1 of Amp PCB connector P6 (or P7 depending upon the unit's applicable voltage rating).

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1

CHASSIS COVER

2 CHASSIS 3 TOP COVER

IO1 PCB 8

12

6

7

IO2 PCB 8 8 AMP ASSY 5 P3B P2 P5 P3A COUPLER 9 BAR 10 5 5

CONNECT TO P3A RED/BLK.

CONNECT TO P3B BLU./GRY.

PRIMARY 5 11 2X CONNECT TO P5

CHASSIS BASE

4 SECONDARY 13

Figure 1. Main Disassembly/Assembly Exploded View

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3.4 Remove two black screws (5) from the Amp PCB (8) and three black screws (6) from the Heatsink (7). 3.5 Remove the Heatsink/Amplifier PCB Subassembly from the chassis base. 3.6 Place the subassembly on the workbench with the heatsink (7) fins down. 3.7 Remove three black decoupler bar screws (5) that connect the heatsink to the Amplifier PCB. 3.8 Remove the Amplifier PCB (8) from the heatsink. 4. Amplifier PCB Replacement (Chassis Base) IMPORTANT: Thermal grease should be applied to the heatsink before seating the PCB. 4.1 Place the Amplifier PCB (8) onto the heatsink (7). Align the coupler bar (9) screw holes with the screw holes of the heatsink. The PCB should be component side up with the power devices resting on the inner side of the heatsink. 4.2 Secure the coupler bar and Amplifier PCB to the heatsink by tightening three black screws (5). IMPORTANT: Make sure that the coupler bar does not make contact with the metal tab of transistor Q305. 4.3 Place the Heatsink/Amplifier PCB subassembly solderside down into the chassis base. Secure the upper-left hand corner of PCB onto the standoff snap. Secure the subassembly to the chassis base by tightening two black screws (5) on the Amp PCB and three black screws (6) on the heatsink.

4.4 Connect the following cables: · Connect the main power's two-pin cable to the Amp PCB's P5 connector. · Connect the tranformer's secondary fivepin cable to the Amp PCB's P4 connector. · Connect the transformer's primary five-pin cable to the Amp PCB's P7 connector. IMPORTANT: Pin 1 of the transformer's five-pin primary cable is keyed to pin 1 of Amp PCB connector P6 (or P7 depending upon the unit's applicable voltage rating). 4.5 Install the Chassis Cover/Top Cover (Procedure 2). 5. Transformer Removal 5.1 Remove the Chassis Cover/Top Cover (Procedure 1). 5.2 Disconnect the following cables from the transformer: · Disconnect the transformer's five-pin primary cable from the Amp PCB's P7 connector. · Disconnect the transformer's five-pin primary cable from the Amp PCB's P4 connector. 5.3 Remove transformer cables from cable clamps (12) and lift the transformer from the chassis base (4). 6. Transformer Replacement 6.1 Place the transformer (10) into the recess of the chassis base and align it with the chassis base mounting holes. Make sure that the primary side is facing the IEC Connector Assembly (13). 6.2 Place the two transformer clips (11) over the transformer's mounting tabs. Secure the transformer to the chassis base by tightening the two black screws (5).

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6.3 Connect the following cables: · Connect the transformer's five-pin secondary cable to the Amp PCB's P4 connector. · Connect the transformer's five-pin primary cable to the Amp PCB's P7 connector. IMPORTANT: Pin 1 of the transformer's five-pin primary cable is keyed to pin 1 of Amp PCB connector P6 (or P7 depending upon the unit's applicable voltage rating). 6.4 Install the Chassis Cover/Top Cover (Procedure 2). 7. IO1 & IO2 PCB Removal (Chassis Top) 7.1 Remove the Chassis Cover/Top Cover (Procedure 1). 7.2 Remove six black screws (5) from both Amplifier IO PCB's (8). Remove the IO2 PCB board first. Grasp it by the top corners, lift up and off the chassis-top's standoffs. (Note: The IO boards are connected by a 12-pin cable. Do not attempt to separate until both are removed). 7.3 Remove both two-pin and eight-pin cables from the cable clamp (12) from the inside of the chassis-top cover. 7.4 Grasp the IO1 PCB board by its top corners, lift up and off the chassis-top's standoffs. Position the board at a 45° angle and carefully pull it back so that the I/O connectors clear the top cover. 7.5 To separate boards, disconnect the 12pin cable from connector P1A on the larger board.

8. IO1 & IO2 PCB Replacement (Chassis Top) 8.1 Connect the 12-pin cable to connector P1A on the larger board. 8.2 Carefully align both board's connectors into the chassis top cover and snap them onto the chassis standoffs. 8.3 Secure the two-pin and the eightpin cables into the cable clamps (12). 8.4 Replace six black screws (5) and tighten to secure both boards. 8.5 Install the Chassis Cover/Top Cover (Procedure 2).

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Flush-Mount Loudspeaker Procedures
1. Flush-mount Loudspeaker

C. Use Procedure 1.2 to return the grille to the enclosure. 1.5 Terminal Cup Removal

NOTES: Certain parts will be referred to in these procedures. The numbers in parentheses correspond to the individual parts called out in Figure 2. 1.1 Grille Removal To remove the grille (Not Shown) take a scribe or a small flat-head screwdriver to grasp an edge of the grille. Gently lift the grille out from the enclosure (2). 1.2 Grille Installation Push the grille into the enclosure (2) until it is flush with the rim of the enclosure. Orientation of the logo is not necessary. 1.3 Driver Removal

A. Use a phillips-head screwdriver to remove one screw (7) from the junction-box cover. B. Swivel the junction-box cover out to expose the terminal cup (5) in the recess of the speaker enclosure (2). C. Use a phillips-head screwdriver to remove three screws (3) that secure the terminal cup to the speaker enclosure. D. Use Procedure 1.3 to remove the driver (4) from the speaker enclosure (2). E. Disconnect the terminal wires from the driver and remove the faulty terminal cup. 1.6 Terminal Cup Replacement

A. Use Procedure 1.1 to remove the grille from the enclosure (2). B. Use a phillips-head screwdriver to remove four screws (3) securing the driver (4) to the enclosure's baffle (6). Carefully lift the driver from the enclosure and cut the wires as close to the terminals as possible. 1.4 Driver Replacement A. Strip the terminal wires from the terminal cup (5) and connect them to the replacement driver (4). Connect the red wire to the + positive terminal and the black wire to the - negative. B. Align the driver so their four screw holes align with the screw holes of the enclosure's baffle (6). Secure the driver to the enclosure (2) by tightening four screws (3) with a phillips-head screwdriver.

A. Use Procedure 1.4 to connect the replacement terminal cup (5) to the driver (4). B. Place the enclosure (2) on its side. Fit the terminal cup into the slot at the back of the enclosure. See Figure 2 for the proper orientation of the terminal. C. While holding the terminal from the inside of the enclosure, tighten three screws (3) with a phillips-head screwdriver. D. Use Procedure 1.4 to secure the driver (4) to the enclosure. E. Use Procedure 1.2 to secure the grille to the enclosure.

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7

Surface-Mount Loudspeaker Procedures
1. Surface-Mount Loudspeaker

3 8

Junction-Box Cover

2

NOTE: The Surface-mount Loudspeaker has only two removable and replaceable parts, the grille and the grille's scrim cloth. Refer to the Surface-mount Assembly Part List for the grille and scrim cloth's order numbers. 1.1 Grille Removal

5

Black

Grasp one edge of the grille with a small scribe and gently pull the grille from the enclosure. The grille's scrim cloth is behind the grille. 1.2 Grille Replacement 1. Place the scrim cloth inside the grille.

Red
6

The Baffle is Adhered to Enclosure

4 3

2. Place the grille over the twiddler section of the enclosure (Refer to Figure 3 for the correct orientation). Press the grille until it snaps into place.

Item 1 on the Packaging Part List

Figure 2. Flush-Mount Loudspeaker Exploded View

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Grille

Figure 3. Surface-mount Loudspeaker

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TEST PROCEDURES
Main Assembly Test Procedures Test Set-Up Parameters
Switches All switches are referenced by their block diagram location on the top of the unit. Set them according to the table below. Block Switch Description No. 1 Page Source Gain 2 Optivoice Compressor 5 Page Enables Left and Right 7 Music Compressors A and B 9 Music Input Mode 10 Line Output Mode Setting(s) Music RCA Inputs A, B (Left and Right) left (0dB) left(off) right(on) forward(off) rear(stereo) center(Music +Page) Connect the positive (+) side of an oscillator to the positive input terminal on the RCA jack. Connect the negative (-) side to the negative (-) and RCA jack ground sleeve. Output Connections Page and Line Outputs (Left and Right) Connect the positive (+) side of the test equipment to the positive (+) output terminals. Connect the negative (-) side to the negative (-) output terminals. Do this using quick connectors (P/N180094) supplied with the unit. Speaker Output (Left and Right) Use the same output connections as above with a 2/50Watt resistor as a load. All test equipment should be isolated from ground (floated). Input Connections Page Input Connect the positive (+) side of an oscillator to the positive input terminal. Connect the negative (-) side to the negative (-) and common input terminals. Do this using quick connectors (P/N180094) supplied with the unit.

Potentiometers All potentiometers are referenced by their block diagram location on the top of the unit. Set them according to the table below. Block Pot. Description No. 1 Page Source Gain Trim 3 Page Trigger Level 4 Page Mix Trim 6 Music A and B Source Trim 12 Treble and Bass Trim 13 Volume Trim Right Setting(s) ccw(0dB) cw(max) cw(max) cw(max gain) center(flat) cw(max gain)

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1. Page Input To Page Output Gain 1.1 Apply a 5 Vrms, 1KHz signal to the Page Input. 1.2 Measure the Page Output. Should be 4.22 Vrms (+ .78 Vrms/ - .67 Vrms). 2. Page Input To Line Outputs Gain 2.1 Apply a 5 Vrms, 1KHz signal to the Page Input. 2.2 Measure the left and right Line Output. Should be 4.22 Vrms (+1.09 Vrms/ -.87 Vrms). 3. Music Input A to Line Outputs Gain 3.1 Apply a 500mV rms, 1KHz signal to the Music A left and right input. 3.2 Measure the left and right Line outputs. Should be 4.47 Vrms (+.84 Vrms/ - .71 Vrms). Note: Repeat this test for Music Input B. To select Music Input B, short the remote select input. 4. Music Input A to Speaker Outputs Gain 4.1 Apply a 10 mVrms, 2KHz signal to the left and right Music A input. 4.2 Measure the Speaker output. Should be 290 mVrms (+54mVrms/ - 46mVrms). 5. Frequency Response 5.1 Apply a 10 mVrms, 2KHz signal to the left and right Music A Input. 5.2 Reference a dB meter to the Speaker output and set level to 0 dBr. 5.3 Change the signal to 12.5 KHz. 5.4 Measure the left and right Speaker output. Should be 5.1 dBr (± 2.0 dB).

6. Noise 6.1 Set the volume control to Max. 6.2 With the source off, measure the left and right Speaker output. Should be 5.6 mVrms. 7. Full Power Distortion 7.1 Apply a 130 mVrms, 800 Hz signal to the left input. 7.2 Measure the distortion at the left Speaker output. Should be 1% THD. 7.3 Change the frequency to 95 Hz and adjust the applied signal to get 5.66 Vrms at the left Speaker output. 7.4 Measure the distortion at the left Speaker output. Should be 2 %. Note: Repeat this procedure for the right channel. 8. Separation 8.1 Apply a 100 mVrms, 800Hz to the right Music A Input. Terminate the left Music A Input with a 50 resistor. 8.2 Measure the left Speaker output. Should be 10 mV. Note: Repeat this procedure for the right channel.

19

Loudspeaker Test Procedures
NOTE: These procedures apply to both Flush-mount and surface-mount loudspeakers. The surfacemount loudspeaker is not repairable. If this loudspeaker fails the following tests contact your Bose® Field Service Representative.

1. Rub and Tick Test
Apply a signal of 6.0 Vrms at 80 Hz to the input terminals of the loudspeaker. See Figure 1. No extraneous noises such as rubbing or ticking should be heard. Replace any driver that has a rubbing or ticking noise. NOTE: There is a normal suspension noise. To distinguish between a rub or tick and suspension noise, displace the cone slightly with your finger. If the rubbing can be made to go away or get worse, then it is a rub or tick and the driver should be replaced. If the noise stays the same, it is a suspension noise and the driver is fine. Suspension noise will not be heard with program material.

2. Air Leak Test
Apply a signal of 6.0 Vrms ± 1V at 80 Hz to the speaker input terminals. See Figure 1. For at least 5 seconds, listen for air leaks around the driver, speaker terminals, and along all cabinet joints. Repair air leaks as required.

3. Sweep Test
Sweep the oscillator from 50 Hz to 5 kHz at 6Vrms. There should not be any loud extraneous sounds. If there are any loud buzzes or distortion, replace the driver. The whooshing noise from the port at around 80 Hz is acceptable. NOTE: There should not be any buzzes or rattles from the internal connecting wires or components. Redress any wire or component that buzzes.

Input Terminals

Figure 1. Input Terminals
4. Phase Test
NOTE: Supply voltage should only be momentarily applied to the speaker input terminals to avoid possible damage to the speaker. Apply a 6 Vdc ± 1 Vdc signal to the speaker input terminals (see Figure 1). The driver should move outward.

20

PART LISTS AND EXPLODED VIEWS
The following section contains part lists and exploded views for the FreeSpace®6 business music system. The part lists are broken down as follows:

· Main Assembly Part List and Main Assembly Exploded View. · Remote Assembly Part List and Remote Assembly Exploded View · Main Assembly Packaging Part List and Main Assembly Packaging Exploded View. · Flush-mount Loudspeaker Assembly Part List and Exploded View. · Flush-mount Loudspeaker Assembly Packaging Part List and Packaging Illustration. · Surface-mount Loudspeaker Assembly Part List and Illustration. · Surface-mount Loudspeaker Assembly Packaging Part List and Packaging View. · Electrical Part Lists : These lists contain all electrical and mechanical parts located on the PCB assembly 177300, Revisions 0 and 1. PCB layouts and schematics are located in the back of the service manual.

21

Main Assembly Part List (Figure 4)

Item Number
1 2 3 4 5 6 7 8 9 10 11 12 13 14 Notes:
!

Description
Chassis,Cover,FreeSpace®6 Screw,Mach,8-32,Pan,Xrec/Slot Chassis,Top Cover,FreeSpace 6 Chassis,Base,FreeSpace 6 Screw,#8-32x.25,Pan,Xrec Screw,#8-32x2.75,Pan,Xrec Heatsink,FreeSpace 6 Pcb Assy,FreeSpace 6,Amp,S/f Coupler Bar,FreeSpace 6 Transformer,120/240V,FreeSpace 6 Transformer,100V,FreeSpace 6 Clip,Transformer Clip,Cable,Dbl Face Adh,.76" Conn Assy,IEC Receptical Nut,Hex,8-32,keps

Part Number
177287 172715-08 177286 177285 179096-04 179096-44 177283 181692 177284 177278 178892 179108 131062 179064 100413-2

Qty Per Assy
1 2 1 1 13 3 1 1 1 1 2 3 1 1

See Note

4

4 1,3

2

1. The individual parts located on the PCB's are listed in the Electrical Part List. 2. ! 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. 3. The PCB Assembly is divided into three parts: the Amplifier PCB, IO1 PCB, and IO2 PCB. The PCB locations are identified on the FreeSpace 6 Exploded View. This information is provided for reference only. 4. This part is not normally available from Customer Service. Approval from the Field Service Manager is required before ordering.

22

1 CHASSIS COVER

2 CHASSIS TOP COVER 3 12

LOCATE WITHIN BOX EMBOSSED ON CHASSIS

14

IO1 PCB 8

12

6 7 12 LOCATE WITHIN BOX EMBOSSED ON CHASSIS

IO2 PCB 8 8 AMP ASSY 5 P3B P2 P3A COUPLER 9 BAR P5 5 10

TOP VIEW
5 CONNECT TO P3B

PRIMARY 5 11 2X CONNECT TO P5

CHASSIS BASE

4 SECONDARY 13

Figure 4. Main Assembly Exploded View

23

C43

1

1 1

1

Remote Assembly Part List
Item Number 1 2 Description PCB Assy,FreeSpace 6,AMP,S/F Cover,Remote,FreeSpace 6,Europe Cover,Remote,FreeSpace 6,Japan Cover,Remote,FreeSpace 6,Aus,Am/Can Knob,Remote,FreeSpace 6 Screw,OVLHD,6-32x1.00,Am/Can Screw,OVLHD,M3.5x25mm,Aus,Europe Screw,OVLHD,M4x25mm,Japan Screw,TAPP,6-13x.5,PAN,XREC Cable Tie Bag,Poly,6x10x5 mil
4 3 2

Part Number 181692 178101 178102 178103 178104 178115-16 178116-25 178117-25 173555-08 135540 147794

Qty Per Assy 1 1 1 1 1 2 2 2 2 2 1

See Note

3 4

5 6 7

1

6 2 PLCS. 5 BLACK YELLOW

7

Figure 5 Remote Assembly Exploded View

24

Main Assembly Packaging Part List (Figure 5) Item Number 1 2 3 4 Description Packing, Endcap, EPS, Left Polybag, 12"x8"x24" Packing, Endcap, EPS, Right Rem,RVC Walplt,Frspc 6,US/CAN Rem,RVC Walplt,Frspc 6,Eur Rem,RVC Walplt,Frspc 6,Japan Rem,RVC Walplt,Frspc 6,Australia Packing, Crease Sheet
!

Part Number 177949 143076 177305 178111 178113 178112 181735 177950 173350 173351 173352 173354 181690 177948 181704-1 181704-2 180094

Qty Per Assy 1 1 1 1

See Note

5 6

1 1 1

Line Cord,120V,Detachable, US/CAN Line Cord,230V,Detachable,UK Line Cord,230V,Detachable,Europe Line Cord,240V,Detachable,Australia Line, Cord,100V,Detachable,Japan Carton, RSC Lit kit Assy,FS6,F/S,Japan Lit kit Assy,FS6,F/S, Australian, Eur,UK, US/Can Connector Kit, Assy

7 8

1 1

9 Note:

1

1. ! 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.

25

8 1

9

2 4 3

5

6

7

Figure 6. Main Assembly Packaging Exploded View

26

Flush-mount Assembly Part List Item Description Number 1 Grille Assy. 2 3 4 5 6 7 8 Enclosure Assy, Back Can, 102-F6 Screw, Hilo, 8, Pan, Xrec Twiddler, 2.25" Cup, Terminal Baffle, 75 Cu In, White Screw, Mach, 8-32, Pan,Xrec/Slot Foot, Clear, .312x.085, Bulk Part Number Qty 1 ----------172721-10 149167 176459 ----------172715-08 178321-99 1 7 1 1 1 1 2 * * See Note

*This part was listed and illustrated for reference purposes only.

7

3 8

Junction-Box Cover

2

5

Black

Red
6

The Baffle is Adhered to Enclosure

4 3

Item 1 on the Packaging Part List

Figure 7. Flush-mount Exploded View
27

Flush-mount Packaging Part List Item Description Number 1 Shield, Paint 2 3 4 5 6 7 8 9 10 11 12 Grille Assy, 4pk, Wht Pan Mounting Assy, 4 Pk Spring Assy, 8 Pack, Freespace 6 Carton, RSC Packing, Insert Packing, Crease Sheet, 18x21 Packing, Crease Sheet, 16.07x5.75 Packing, Crease Sheet, 20.75x17.0 Bushing, Short,.75" Bag,Poly, 14.38x9.87x2 Mil Packing, Sheet, 8.75x8.75x.03
7 10

Part Number 180092 178133-2 178135 178132 177752 177744 177749 177747 177750 146046 103351 180023

Qty 1 1 1 1 1 1 1 1 1 1 1 1

See Note

9

2 8 12

3

4

6

5

Figure 8. Flush-mount Loudspeaker Packaging Illustration
28

Surface-mount Assembly Part List Item Number 1 Knob, White Knob, Gray 2 3 Description Part Number 178149-02 178149-01 177146-01 177146-02 181192 Qty 1 1 1 1 1 * See Note

Grille, Speaker, Computer Gray Grille,Speaker, Arctic White Cloth, Scrim, Grille

*Part not illustrated

2

3 1

Figure 9. Surface-mount Loudspeaker Illustration

29

Surface-Mount Packaging Part List Item Description Number 1 2 3 4 5 6 Bracket, Wall, White Bracket, Wall, Gray Knob And Pkg Assy, Arctic White Knob And Pkg Assy, Gray Carton, 4 Pack Packing, End Cap, Packing, Crease Sht, 46.5x8.5 Bag, Poly, 14.38x9.87x2 Mil Part Number 178146-02 178146-01 181736-02 181736-01 181535 181537 181536 103351 Qty Per Pack 4 4 1 1 1 8 1 4 See Note

2 5

1

6

4

3

Figure 10. Surface-mount Loudspeaker Packaging
30

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 0
Resistors

Reference Designator
R1 R2,3,5

Description
Pot,Rotary,50k, 10%,Dual Pot,Rotary,10k, 10%,Single Pot,Rotary,10k, 10%,dual 10.0K,1%,1/10W, 0805

Part Number
177289-503 177290-103

Reference

R6-9 R10,11,27,3639,44,45,47,50,52, 53,55,56,61,63,64, 65,70-72,75,85,89, 96,99,101,107,110, 116,128,129,130, 135,152,202,204, 206,212,213,218, 219,221,222,240, 256,265,275,315, 319,321,322,336, 339,345, 378,379 R12,203,214,362

177289-103 133625-1002

402,1%,1/10W, 0805 R13,18,59,76,87,94, 30.1K,1%,1/10W, 127, 137,291,331, 0805 335, 355 R14-17,21,34,35,62, 1.00K,1%,1/10W, 66, 79,88,95,98,103, 0805 106,109,112,136, 287,320 R19,20,86 1.54K,1%,1/10W, 0805 R22,23,311 5.62K,1%,1/10W, 0805 R24,25,28,29,31, 20.0K,1%,1/10W, 113,123,124,307, 0805 310, 377 R26,253,255,267, 7.50K,1%,1/10W, 269,312 0805 R32,58,74,151,257, 1M,5%,1/10W, 258,264,266,305 0805 R33,90,92 1.2K,2%,1/4W, 52mm,CF R40,117,200,216, 100,1%,1/10W, 350,376 0805 R41,208,306 301K,1%,1/10W, 0805 R42 26.7K,1%,1/10W, 0805 R43,121,143,201, 301,1%,1/10W, 210,217,236, 0805

133625-4020 133625-3012 133625-1001

133625-1541 133625-5621 133625-2002 133625-7501 133626-1055 121243-1211222 133625-1000 133625-3013 133625-2672 133625-3010

31

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 0
Resistors (Continued)

Reference Designator
R46,54,73,209

Description

Part Number
133625-5622 133625-6192 133625-1003

Reference

56.2K,1%,1/10W, 0805 R51,119,120,125,12 61.9K,1%,1/10W, 6, 138-141,325,346 0805 R57,91,97,102,104, 100K,1%,1/10W, 111,133,157,160, 0805 207,224,241,277, 279,304,317,358 R60,78 68.1K,1%,1/10W, 0805 R67,83,237,301,333 4.12K,1%,1/10W, 353 0805 R68 15.0K,1%,1/10W, 0805 R69 45.3K,1%,1/10W, 0805 R77,84 127K,1%,1/10W, 0805 R80 26.1K,1%,1/10W, 0805 R81 1.82K,1%,1/10W, 0805 R82,131,154 17.8K,1%,1/10W, 0805 R91,205,215,278, 15.0K,1%,1/10W, 326,327,347,349 0805 R93,118,318 2.43K,1%,1/10W, 0805 R100,108 2.55K,1%,1/10W, 0805 R105,316,368, 370 47.5K,1%,1/10W, 0805 R114,357 200K,1%,1/10W, 0805 R115,134 73.2K,1%,1/10W, 0805 R122,142 4.75,1%,1/10W, 0805 R132,145,148,161, Jumper,Chip,0805 232,242,260,262, 276,290,292,356, 374,380,381 R144,323,338,343, 2.00K,1%,1/10W, 363 0805 R146,147,149,150 255,1%,1/10W, 0805

133625-6812 133625-4121 133625-1502 133625-4532 133625-1273 133625-2612 133625-1821 133625-1782 133625-1503 133625-2431 133625-2551 133625-4752 133625-2003 133625-7322 133625-4R75 133627

133625-2001 133625-2550

32

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 0
Resistors (Continued)

Reference Designator
R153 R155158,239 R156,159 R211,280,340 R220,223 R238,308,309,313, 314 R254,259,268,274 R270-273 R300 R302 R303,324,344 R324,337,359 R328,352 R329,342 R330,354 R332,334,348,351 R341,375 R364 R366,367,369,372 R371 R373 R500

Description
27.4K,1%,1/10W, 0805 5.11K,1%,1/10W, 0805 Pot,Rotary,10K, 10%, 1/2W,Trim 88.7K,1%,1/10W, 0805 11.0K,1%,1/10W, 0805 4.75K,1%,1/10W, 0805 18.2K,1%,1/10W, 0805 57.6K,1%,1/10W, 0805 25.5K,1%,1/10W, 0805 6.49K,1%,1/10W, 0805 14.0K,1%,1/10W, 0805 7.15K,1%,1/10W, 0805 110K,1%,1/10W, 0805 9.09K,1%,1/10W, 0805 23.7K,1%,1/10W, 0805 4.99K,1%,1/10W, 0805 38.3K,1%,1/10W, 0805 2.74K,1%,1/10W, 0805 RES,CF,1/4W,5%,1 0 OHM Jumper,22AWG, Non-Insul,10.0mm 196,1%,1/10W, 0805 Pot,Rotary,10k, 10%

Part Number
133625-2742 133625-5111 170042-103 133625-8872 133625-1102 133625-4751 133625-1822 133625-10R0 133625-2552 133625-6491 133625-1402 133625-7151 133625-1103 133625-9091 133625-2372 133625-4991 133625-3832 133625-2741 121243-1211005 148242-100 133625-1960 177299-103

Reference

33

FreeSpace ®6 Electrical Part List PCB P/N 177300, Revision 0
Capacitors

Reference Designator
C1,2,29,123,200, 205 C3,7,23,24,25,35, 47,50,51,63,89,93, 100,103,116,117, 118,119, 120 C4,5,36,38,54,86, 90,102,105,202,217, 227,237,301,304, 309,335,348 C6,14,19,39,106, 107,112,113, 114,115,121,122 C8,11,15,18,20,27, 32,46,53,57,62,65, 76, 77,80,81,88,92, 94, 95,96,101,109, 110, 153,201,204, 206, 208,216,218, 220, 222,223,226, 238, 300,307,308, 310, 311,321,324, 501, 512 C9,43,55,79,98,207, 219,312,322 C10,41,59,224,239 C12,17,108,111, 242,243,244,245, 339, 340,353,354, 357,361,362 C13,314,315,329, 330 C16,320,331,355, 356, 359,360 C21,26,49,52,70,74

Description
.01uF,10%,50V, X7R,0805 47pF,5%,50V,0805, COG 10uF,20%,35V,85, EL 100pF,5%,50V, 0805,COG .022uF,10%,50V, X7R,0805

Part Number
133623-103 133622-470

Reference

149948-100V

133622-101 133623-223

1.0uF,20%,50V,105, EL 10pF,5%,50V,0805, COG .10uF,80%,25V, Y5V,0805

137126-1R0 133622-100 133624

18uF,5%,50V,85, BOX 1000pF,5%,50V, 0805,COG 680pF,5%,50V, 0805,COG C22,48,68,69,71,75, 4.7uF,20%,35V,105, 84 EL C28 47uF,20%,16V,105, EL C30,33,34,37,40,56, 2.2uF,20%,50V,105, 58,61,66,67,83,85 EL C31,72,73,78,82, .1uF,5%,50V,85, 333,334,349,352 BOX C42,303 15uF,5%,50V,85, BOX

137127-184 133622-102 133622-681 137126-4R7 137126-470 137126-2R2 137127-104 137127-154

34

FreeSpace ®6 Electrical Part List PCB P/N 177300, Revision 0
Capacitors (Continued)

Reference Designator
C44 C45,60 C64,319,327,337, 350, 351 C87 C104,203,341,342 C225,240,248-250 C228,241 C229,230,246,247 C302 C306 C313,317,325,326 C336,345 C344,346,347
!

Description
220uF,20%,25V,85, EL 100uF,20%,25V,85, EL .22uF,5%,50V,85, BOX .47uF,5%,50V,85, BOX 22uF,20%,25V,85, EL 390pF,5%,50V,0805 ,COG .0012uF,5%,100V, 85, BOX, .047uF,5%,63V,85, BOX .068uF,5%,63V,85, BOX 1800pF,10%,50V, X7R,0805 .0015uF,5%,100V, 85,BOX 2200uf,20% ,50v, 105,EL 3300uf,20%,35v, 105,EL 1000pf,20%,250vac, Y-type,

Part Number
149948-221E 149948-101E 137127-224 137127-474 149948-220E 133622-391 137127-122 137127-473 137127-683 133623-182 137127-152 144000-222H 144000-332V 170183

Reference

C363,364

Note: 1. ! 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.

35

FreeSpace ®6 Electrical Part List PCB P/N 177300, Revision 0
Diodes

Reference Designator
D1,3,4,6 D2,5 D10,11,1317,22,24,107,201, 204,300 D12,20,21,200,302, 309,310 D18,19,23,202,203 D25,27,29,301 *D305 !
!

Description

Part Number

Reference

LED,2.5v,10ma 177280 Green,Vertical LED,2.5v,10ma, 177281 Grn/Red,Vertical Dual,SOT-23,BAV99 147239 Switching,75V, 300mA Zener,18V,1W,5%, 1N4746 Dual,SOT-23,BAV70 Rectifier,Bridge, 100v,1.0a Rectifier,Bridge, 1 00v,6a Zener,16V,1W,5%, 1N4745 121501 116995-4746A 147249 143952 170214 116995-4745A

*See Note 1 *See Note 1

*D306

D307

Transistors

Reference Designator
Q1,2,202,300,304 Q3-7 Q200 Q201 Q203,301,302 Q305

Description
BPLR,N,40V,200mA ,SOT23 BPLR,N,SOT23,2S D2114K BPLR,P,60V,200mA, TO-92 BPLR,N,30V,500mA ,TO-92 BPLR,P,40V,200mA, SOT23 DARL,NPN, Tip140

Part Number
146819 177294 119168 173476 148596 177310

Reference

Note: 1. ! This part is critical for safety purposes. Failure to use the recommended replacement part may create shock, fire and/or other hazards.

36

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 0
Integrated Circuits

Reference Designator
U1-4,10,15,200, 202-205,301 U11,12 U201 U302 U5,7 U6,13,14,300,303 U8 U9 U302 U304,307 U305 U306

Description
Op-Amp,Dual, DIP-8,RC4559 Switch,Active, SIP-8,BA3128N Op-Amp,Dual, DIP-16,CN3280 Op-Amp,Single, DIP-8,CA3080 Compandor, NE572N OpAmp,Quad, DIP-14,NJM2059 Multiplexer/ Demultiplexer,8CH, DIP-16,4051 Multiplexer, DIP-16,CD4052 Op Amp,Sngl,DIP 8,CA3080 Power Amp,Mult-11, 45W,TDA7396 Voltage Regulator,15V,Pos., TO-220 Voltage Regulator,15V,Neg., TO-220

Part Number
108568 177292 133171 119834 178894 144008 177308 147243 119834 177279 143858 143806

Reference

37

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 0
Miscellaneous Components

Reference Designator
!

Description
Fuse,630ma 5x20mm Fuse,Time Lag,Auto,400mA (Inv.) Fuse,10.0A, 5x20mm,Slo Blo Fuse,3.0A,250V, .60x.19,Slo Blo Fuseclip,5mm

Part Number
140346-0630 177312-0400 177311-10000 135677-10 178548 148242-100 177291-03 177291-02 177291-08 177291-05 177295 144017 177298-12 148591-12 177298-08 148591-08 177296 133220-02 133220-05 143963 178742-4

Reference
*See Note 1 *See Note 1 *See Note 1 *See Note 1

*F1,2 *F3,4 *F5 *F6

!

! !

FC1A,2A,5A,F61A, 62A,65A,FC1B,C2B, C5B, F61B,62B,65B JP300 Jumper,22AWG, Non-Insul. ,10.0mm J1,2,9,10 Connector,Rt.Ang., 3 pos,Blk J11,8 Connector,Rt.Ang., 2 pos,Blk J12 Connector,Rt.Ang. Beau J3 Connector,Rt.Ang., 5 pos,Blk J4,5 Connector,RCA, Dual,Female K1 Relay,24 Vdc,4PDT P1 Harness,26 AWG,Freespace 6 P1A Connector,Header, 12 pos P2 Harness,24 AWG,Freespace 6 P2A Connector,Header, 8 pos P3 Harness,22 AWG,Freespace 6 P3A ,3B Connector,Header, Inline,PCB Mnt.,2p P4 Connector,Header, Inline,PCB Mnt.,5p P5 Connector,Header, 2 pos P6 Connector,Header, High Current 8mm pitch

38

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 0
Miscellaneous Components

Reference Designator P7 P9 S1-6,S9 S7 S10 SW500 TP1-9,10,500, VR300

Description Connector,Header, High Current 8mm pitch Connector,Header,5 pos Switch,Slide,DPST, Vertical Switch,Slide,DPDT Switch,DIP,SPST, 4 pos. Switch,SPST, Rocker Connector,Header, Test Jack,1 pos.,OR Varistor,Met. Oxide, 275V,75 joule

Part Number 178742-4 148591-05 176148 176147 148777-1 178108 171621-0103 170189

Reference

!

Note: 1. ! 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.

39

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 1
Resistors

Reference Designator
R1 R2,3,5 R6,7 R8,9

Description
Pot,Rotary,50k, 10%,Dual Pot,Rotary,10k, 10%,Single Pot,Rotary,20k, 10%,Dual Pot,Rotary,10k, 10%,Dual 10.0K,1%,1/10W, 0805

Part Number
177289-503 177290-103 177289-203 177289-103 133625-1002

Reference

R10,11,27,36-39, 44,45,47-50,52,53, 55,56,61, 63-65, 70-72,75,85,89,96, 99,101,107,110,116, 128-130,135,152, 202,204,206,212, 213,218,219,221, 222,232,240,242, 256,265,275,315, 319,321,322,336, 339,345,378,379 R12,203,214,362 402,1%,1/10W, 0805 R13,18,59,76,87,94 30.1K,1%,1/10W, 127,137,291,331, 0805 355 R14-17,21,34,35,62, 1.00K,1%,1/10W, 66,79,88,95,98103, 0805 106,109,112,136, 229,247,287,320 R19,20,86,226,231, 1.54K,1%,1/10W, 249,252 0805 R22,23 5.62K,1%,1/10W, 0805 R24,25,28,29,31, 20.0K,1%,1/10W, 113,123,124,155, 0805 158,307,310,377 R26 7.50K,1%,1/10W, 0805 R32,58,74,151,257, 1M,5%,1/10W, 258,264,266,305 0805 R33,90,92 1.2K,2%,1/4W, 52mm,CF R40,117,200,216, 100,1%,1/10W, 350,376 0805 R41,208,306 301K,1%,1/10W, 0805 R42 26.7K,1%,1/10W, 0805 R43,121,143,201, 301,1%,1/10W, 210,217,236 0805

133625-4020 133625-3012 133625-1001

133625-1541 133625-5621 133625-2002 133625-7501 133626-1055 121243-1211222 133625-1000 133625-3013 133625-2672 133625-3010

40

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 1
Resistors (Continued)

Reference Designator
R46,54,73,209,233, 243, R51,119,120,125, 126,138-141, 325,328,346,352, R57,91,97,102,104, 111,133,157,160, 207,224,241,277, 279,304,317,358 R60,78 R67,83,237,301, 333,353 R68 R69 R77,84 R80 R81 R82,131,154 R100,108 R105,234,244,316, 368,370 R114,357 R115,134 R118,318,93 R122,142 R132,145,161,276, 290,292,380,381 R144,323,338,343, 363 R146,147,149,150

Description
57.6K,1%,1/10W, 0805 61.9K,1%,1/10W, 0805 100K,1%,1/10W, 0805 68.1K,1%,1/10W, 0805 4.12K,1%,1/10W, 0805 15.0K,1%,1/10W, 0805 45.3K,1%,1/10W, 0805 127K,1%,1/10W, 0805 26.1K,1%,1/10W, 0805 1.82K,1%,1/10W, 0805 17.8K,1%,1/10W, 0805 2.55K,1%,1/10W, 0805 47.5K,1%,1/10W, 0805 200K,1%,1/10W, 0805 73.2K,1%,1/10W, 0805 2.43K,1%,1/10W, 0805 4.75,1%,1/10W, 0805 Jumper,Chip,0805 2.00K,1%,1/10W, 0805 255,1%,1/10W, 0805

Part Number
133625-5762 133625-6192 133625-1003

Reference

133625-6812 133625-4121 133625-1502 133625-4532 133625-1273 133625-2612 133625-1821 133625-1782 133625-2551 133625-4752 133625-2003 133625-7322 133625-2431 133625-4R75 133627 133625-2001 133625-2550

41

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 1
Resistors (Continued)

Reference Designator
R153 R156,159 R205,215,278,326, 327,347,349 R220,223 R230,250,303,324, 344 R235,245,330,354 R238,308,309,313, 314 R239 R253,255,267,269, 312 R254,259,268,274 R270-273 R280 R300 R302 R311 R329,342 R332,334,348,351 R337,359 R340 R341,375 R364 R366,367,369,372 R373 R500

Description
27.4K,1%,1/10W, 0805 Pot,Rotary, 10K,10%,1/2W, Trim 150K,1%,1/10W, 0805 11.0K,1%,1/10W, 0805 14.0K,1%,1/10W, 0805 23.7K,1%,1/10W, 0805 4.75K,1%,1/10W, 0805 5.11K,1%,1/10W, 0805 8.25K,1%,1/10W, 0805 18.2K,1%,1/10W, 0805 57.6K,1%,1/10W, 0805 56.2K,1%,1/10W, 0805 25.5K,1%,1/10W, 0805 6.49K,1%,1/10W, 0805 5.62K,1%,1/10W, 0805 9.09K,1%,1/10W, 0805 4.99K,1%,1/10W, 0805 7.15K,1%,1/10W, 0805 88.7K,1%,1/10W, 0805 38.3K,1%,1/10W, 0805 2.74K,1%,1/10W, 0805 10,5%,1/4W,CF 196,1%,1/10W, 0805 Pot,Rotary,10k, 10%

Part Number
133625-2742 170042-103 133625-1503 133625-1102 133625-1402 133625-2372 133625-4751 133625-5111 133625-8251 133625-1822 133625-10R0 133625-5622 133625-2552 133625-6491 133625-5621 133625-9091 133625-4991 133625-7151 133625-8872 133625-3832 133625-2741 121243-1211005 133625-1960 177299-103

Reference

42

FreeSpace ®6 Electrical Part List PCB P/N 177300, Revision 1
Capacitors

Reference Designator
C1,2,29,123,200, 205 C3,7,23-25,35,47, 50,51,63, 89,93, 100,103, 116-120 C4,5,36,38,54,90, 102, 105,202,217, 301, 304,309,335, 348 C6,14,19,39,106, 107,112-115,121, 122 C8,11,15,18,20,27,3 2,46,53,57,62,65,76, 77,80,81,88,92,9496,109,110,153,201, 204,206,208,216, 218,220,222,223, 226,238,300,307, 308,310,311,321, 324,501,512 C9,43,55,79,98,207, 219,312,322 C10,41,59,224,239 C12,17,108,111, 242-245,339,340, 343,353,354,357, 358, 361,362 C13,314,315,329, 330 C16,320,331,355, 356,359,360 C21,26,49,52,70,74

Description
.01uF,10%,50V, X7R,0805 47pF,5%,50V,COG, 0805 10uF,20%,35V,85, EL 100pF,5%,50V, COG,0805 .022uF,10%,50V, X7R,0805

Part Number
133623-103 133622-470 149948-100V

Reference

133622-101 133623-223

1.0uF,20%,50V,105, EL 10pF,5%,50V,COG, 0805 .10uF,80%,25V, Y5V,0805

137126-1R0 133622-100 133624

.18uF,5%,50V,85, BOX 1000pF,5%,50V, COG,0805 680pF,5%,50V, COG,0805 C28 47uF,20%,16V,105, EL C30,33,34,37,40,56, 2.2uF,20%,50V,105, 58,61,66,67,83,85 EL C31,72,73,78,82, .1uF,5%,50V,85, 214,235,333,334, BOX 349,352 C22,48,68,69,71,75 4.7uF,20%,35V,105, EL C42,303 .15uF,20%,50V,85, BOX

137127-184 133622-102 133622-681 137126-470 137126-2R2 137127-104 137126-4R7 137127-154

43

FreeSpace ®6 Electrical Part List PCB P/N 177300, Revision 1
Capacitors (Continued)

Reference Designator
C44

Description

Part Number
149948-221E 149948-101E 137126-4R7 137127-224 149947-100E 137127-474 149948-220E 139942 137127-103 137269-101 137127-472 137127-473 137127-122 133622-391 137127-683 133623-182 137127-152 144000-222H 144000-332V

Reference

220uF,20%,25V,85, EL C45,60 100uF,20%,25V,85, EL C48,68,69,71,75 4.7uF,20%,35V,105, EL C64,319,327,337,33 .22uF,5%,50V,85, 8,350,351 BOX C86 10uF,20%,25V,85, EL C87 .47uF,5%,50V,85, BOX C104,203,341,342 22uF,20%,25V,85, EL *C209,227,232, 0,RES,Axial,.2W 237 C210,231 .01uF,5%,100V,85, BOX C211,212,221,233 100pF,10%,50V, DISC,SL C213,234 .0047uF,5%,100V, 85,BOX C215,229,230,236, .047uF,5%,63V,85, 246,247 BOX C228,241 .0012uF,5%,100V, 85,BOX C248-250 390pF,5%,50V, COG,0805 C302 .068uF,5%,63V,85, BOX C306 1800pF,10%,50V, X7R,0805 C313,317,325,326 .0015uF,5%,100V, 85,BOX C336,345 2200uf,20%,50V, 105,EL C344,346,347 3300uf,20%,35V, 105,EL Note:

*See Note 1

1. These parts are screened as C209,227,232,237 resistors.

on the PCB even though they are

44

FreeSpace ®6 Electrical Part List PCB P/N 177300, Revision 1
Diodes

Reference Designator
D1,3,4,6 D2,5 D10,11,1317,22,24,25,27,29, 107,201,204,300, 301 D12,20,21,200,302, 309,310, D18,19,23,202,203
! !

Description
LED,10mA,2.5V, Green,Vert LED,10mA,2.5V, Grn/Red,Vert Dual,SOT-23,BAV99

Part Number
177280 177281 147239

Reference

*D305 *D306

D307

Switching,75V, 300mA Zener,18V,1W,5%, 1N4746 Rectifier,Bridge, 100V,1.0A Rectifier,Bridge, 100V,6A Zener,16V,1W,5%, 1N4745

121501 116995-4746A 143952 170214 116995-4745A *See Note 1 *See Note 1

Transistors

Reference Designator
Q1,2,202,300 Q3-7 Q200 Q201 Q203,301,302 Q305 Note:

Description
BPLR,N,40V,200mA ,SOT23 BPLR,N,SOT23, 2SD2114K BPLR,P,60V,200mA, TO-92 BPLR,N,30V,500mA ,TO-92 BPLR,P,40V,200mA, SOT23 DARL,NPN,tip140

Part Number
146819 177294 119168 173476 148596 177310

Reference

1. ! 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.

45

FreeSpace ®6 Electrical Part List PCB P/N 177300, Revision 1
Integrated Circuits

Reference Designator
U1-4,10,15,200, 202-205,301 U5,7 U6,13,14,300,303 U8 U9 U11,12 U201 U302 U304,307 U305 U306

Description
Op Amp,Dual, DIP-8, RC4559 Comparator, And/Or,NE572N OpAmp,Quad, DIP-14,NJM2059 Mult/Demult,8CH, DIP-16,4051 Multiplexer,DIP-16, CD4052 Switch,Active, SIP-8, BA3128N Op-Amp,Dual, DIP-16,CN3280 Op-Amp,Single, DIP-8, CA3080 Power Amp, Mult-11, 45W, TDA7396 Voltage Regulator,15V, Pos.,TO-220 Voltage Regulator,15V,Neg., TO-220

Part Number
108568 178894 144008 177308 147243 177292 133171 119834 177279 143858 143806

Reference

46

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 1
Miscellaneous Components

Reference Designator
! ! ! !

Description
Fuse,5x20mm, 630mA Fuse,Time,400mA Lag,Auto Fuse,5x20mm, Slo Blo,10A Fuse,.60x.19, 250V, Slo Blo, 3.0A Fuseclip,5MM Connector,Rt.Ang., 3 Pos.,Blk. Connector,Rt.Ang., 5 Pos,Blk. Connector,RCA, Dual,Female Connector,Rt.Ang., 2 Pos,Blk. Connector,Rt. Ang., Beau Jumper,22AWG, Non-Insul, 10.0mm Relay,24Vdc,4PDT Harness,26 AWG,Freespace 6 Connector,Header, 12 Pos. Harness,24 AWG,Freespace 6 Connector,Header, 8 Pos. Harness,22 AWG,Freespace 6 Connector,Header, Inline, PCB, Mnt., 2pos Connector,Header, Inline,PCB Mnt, 5 Pos. Connector,Header,2 Pos. Header,High Current 8mm. pitch Header,High Current 8mm. pitch Connector,Header, 5 Pos.

Part Number
140346-0630 177312-0400C1 177311-10000 135677-10 178548 177291-03 177291-05 177295 177291-02 177291-08 148242-100 144017 181702-12 148591-12 177298-08 148591-08 177296 133220-02 133220-05 143963 178742-4 178742-4 148591-05

Reference
*See Note 1 *See Note 1 *See Note 1 *See Note 1

*F1,2 *F3,4 *F5 *F6

FC1A,C1B,C2A, C2B,C5A,C5B J1,2,9,10 J3 J4,5 J8,11 J12 JP300 K1 P1 P1A P2 P2A P3 P3A ,3B P4 P5 P6 P7 P9

47

FreeSpace®6 Electrical Part List PCB P/N 177300, Revision 1
Miscellaneous Components

Reference Designator
S1-6,8,9 S7 S10 SW500 TP1-10,500
!

Description
Switch,Slide,DPST, Vertical Switch,Slide,DPDT Switch,DIP,SPST, 4 Pos. Switch,SPST, Rocker Connector,Header, Testjack,1 Pos,OR Varistor,Met Oxide ,275V,75 joule

Part Number
176148 176147 148777-1 178108 171621-0103 170189

Reference

VR300

Note: 1. ! 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.

48

SCHEMATICS AND PCB LAYOUTS
The schematics and PC board layouts provided with this manual can be used for units built with PC board 177300, Revisions 0 and 1.

49

FreeSpace®6 Business Music System Sheet 1, PCB IO1 Music Inputs (PCB 177300, Revisions 0 and 1)

Note: This schematic can be used for Revisions 0 and 1 of PCB 177300.

50

FreeSpace®6 Business Music System Sheet 2, PCB IO1 Music Compressor (PCB 177300, Revisions 0 and 1)

Note: This schematic can be used for Revisions 0 and 1 of PCB 177300.

51

FreeSpace®6 Business Music System Sheet 3, PCB IO1 Board Page Processor (PCB 177300, Revisions 0 and 1)

Note: This schematic can be used for Revisions 0 and 1 of PCB 177300.

52

FreeSpace®6 Business Music System Sheet 4, PCB IO1 Board Music/Page Mixing (PCB 177300, Revisions 0 and 1)

Note: This schematic can be used for Revisions 0 and 1 of PCB 177300.

53

FreeSpace®6 Business Music System Sheet 5, PCB IO2 Board Line Outputs (PCB 177300, Revisions 0 and 1)

Note: This schematic can be used for Revisions 0 and 1 of PCB 177300.

54

FreeSpace®6 Business Music System Sheet 6, PCB IO2 Board Remote Volume (PCB 177300, Revisions 0 and 1)

Note: This schematic can be used for Revisions 0 and 1 of PCB 177300.

55

FreeSpace®6 Business Music System Sheet 7, PCB IO2 Tone Control and Surface EQ (PCB 177300, Revisions 0 and 1)

Note: This schematic can be used for Revisions 0 and 1 of PCB 177300.

56

FreeSpace®6 Business Music System Sheet 8, PA Board Dynamic EQ and Limiter Processor (PCB 177300, Revisions 0 and 1)

Note: This schematic can be used for Revisions 0 and 1 of PCB 177300.

57

FreeSpace®6 Business Music System Sheet 9, PA Board Speaker EQ (PCB 177300, Revisions 0 and 1)

Note: This schematic can be used for Revisions 0 and 1 of PCB 177300.

58

FreeSpace®6 Business Music System Sheet 10, PA Board Power Supply and Amp(PCB 177300, Revisions 0 and 1)

Note: This schematic can be used for Revisions 0 and 1 of PCB 177300.

59

FreeSpace®6 Business Music System Sheet 11, Remote Board (PCB 177300, Revisions 0 and 1)

Revision 0

Revision 1

Note: These schematics can be used for Revisions 0 or 1 of PCB 177300.

60

SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE

Bose Corporation The Mountain Framingham, Massachusetts USA 01701

P/N 181816 01/96: Rev.0

FOR TECHNICAL ASSISTANCE OR PART ORDERS, CALL 1-800-367-4008