Bose SoundDock 10 Service Manual
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Bose SoundDock 10 Service Manual

Digital music system
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®
SoundDock
10
Digital Music System
©2009 Bose Corporation
Service Manual
Reference Number 309505-SM Rev. 04
Electronic Copy Only

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Summary of Contents for Bose SoundDock 10

  • Page 1 ® SoundDock Digital Music System ©2009 Bose Corporation Service Manual Reference Number 309505-SM Rev. 04 Electronic Copy Only...

  • Page 2: Table Of Contents

    CONTENTS Safety Information ..........................3 Specifications ............................ 4 Part List Notes ..........................5 Electrostatic Discharge Sensitive (ESDS) Device Handling ............5 Warranty .............................5 Product Description ......................... 6 Packaging Part List ........................... 7 Figure 1. Packaging Exploded View ....................7 Speaker Assembly Part List ......................8 Figure 2.

  • Page 3: Safety 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.

  • Page 4: Specifications

    SPECIFICATIONS Electrical Input Power Rating: U.S.A/Canada 100-120VAC 50/60Hz, 150W International: 220-240VAC 50/60Hz, 150W 100-240VAC 50/60Hz, 150W Acoustic Drivers: Size: 2 - 50 mm Twiddler ® speakers Nominal Impedance: 4 Ohms Port Tuning: 230 Hz Woofer: Size: 116mm Nominal Impedance: 1 Ohm Port Tuning: 47 Hz Physical Description...

  • Page 5: Part List Notes

    ELECTROSTATIC DISCHARGE SENSITIVE (ESDS) DEVICE HANDLING 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.

  • Page 6: Product Description

    Series II remote with two additional buttons available, the AUX and iPod buttons. SOFTWARE UPGRADES Software upgrades may be necessary to keep SoundDock 10 compatible with new iPods. When upgrades are available, Owners.com will have the software and the instructions available to cus- tomers and service personnel to run the updates.

  • Page 7: Packaging Part List

    LINE CORD, 230V, KOREA, BLK 311668-001 LINE CORD, 230V, UKS, BLK 280138-001 LINE CORD, 240V, AUS, BLK 284243-001 COMMITMENT LETTER 251001 SHEET, ADDRESS PAGE, BOSE 289347-001 OWNERS GUIDE, 3L, US 314136 OWNERS GUIDE, 11L, EUR 314137 OWNERS GUIDE, 6L, AP 314138...

  • Page 8: Speaker Assembly Part List

    SPEAKER ASSEMBLY PART LIST Bose ® SoundDock ® 10 Digital Music System Item Description Part Number Note Item Description Part Number Note Number Number LENS (N/A, use grille part number) PCB, ASSY, IR 319107-001S HEATSINK 310387-001 GRILLE (includes lens) 323691-001S...

  • Page 9: Electrical Part Lists

    ELECTRICAL PART LIST DSP PCB Assembly Resistors Resistors Reference Description Part Number Note Reference Description Part Number Note Designator Designator R1000 5.11K, 0603, .1W, 1% 191465-5111 R430 10K, 0603, .1W, 1% 191465-1002 R1001 5.11K, 0603, .1W, 1%, 191465-5111 R431 3.9K, 0603, .1W, 1% 191465-3901 R1002 75 OHM, 0805, 1/10W, 5%...
  • Page 10 ELECTRICAL PART LIST DSP PCB Assembly Resistors (continued) Capacitors (continued). Reference Description Part Number Note Reference Description Part Number Note Designator Designator R904 1K, 0603, .1W, 5% 199403-102 C301 1000, COG, 0603, 50V, 5% 188454-102 R905 47 OHM, 0603, SMD, 100MW, 5% 199403-470 C302 1000, COG, 0603, 50V, 5%...
  • Page 11 ELECTRICAL PART LIST DSP PCB Assembly Capacitors (continued) Capacitors (continued) Reference Description Part Number Note Reference Description Part Number Note Designator Designator C619 68pF, COG, 0402, 50V, 0.1%, 268364-680 C830 68pF, COG, 0402, 50V, 5% 268364-680 C700 100uF, 7343, TANT, lo-R, 10V, 10% 275411-107 C831 68pF, 0603, COG, 50V, 5%...
  • Page 12 ELECTRICAL PART LIST DSP PCB Assembly Capacitors (continued) Diodes Reference Description Part Number Note Reference Description Part Number Note Designator Designator C917 33nF, X7R, 0402, 16V, 5% 296732-333 D1000 DIODE, SOT-23, BAV 99 147239 C919 220, COG, 0603, 50V, 5% 188454-221 D1001 DIODE, SOT-23, BAV 99...
  • Page 13 ELECTRICAL PART LIST DSP PCB Assembly Miscellaneous Reference Description Part Number Note Designator J1000 CONN., USB, MINI-B TYPE, SMT 309011-003 J1001 CONN., RA, 6-P, 1.0MM PITCH, SMT 319448-006 J1003 CONN., SMT, LIF, 30 POS., SIDE 255130-030 J1007 CONN_RCA_SINGLE_YELLOW 314707-0010 J1100 CONN., FFC, .5mm, S-Entry, 50-PIN 310573-050 J200...
  • Page 14 ELECTRICAL PART LIST Power PCB Assembly Resistors Resistors (continued) Reference Description Part Number Note Reference Description Part Number Note Designator Designator R200 1K, 0603, .1W, 1% 191465-1001 R547 3.92K, 0603, .1W, 1% 191465-3921 R201 1K, 0603, .1W, 1% 191465-1001 R548 10K, 0603, .1W, 1% 191465-1002 R202...
  • Page 15 ELECTRICAL PART LIST Power PCB Assembly Capacitors Cont. Capacitors Cont. Reference Description Part Number Note Reference Description Part Number Note Designator Designator C552 56pF, COG, 0402, 50V, 5% 268364-560 C309 1uF, CAP., EL., SMD, 105, 50V, 20% 306245- C566 27pF, 0603, COG, 50V, 5% 188454-270 1R0FA C567...
  • Page 16 ELECTRICAL PART LIST Power PCB Assembly Integrated Circuits Reference Description Part Number Note Designator U200 IC, NOR GATE, QUAD, 2-INPUT, 324043-0010 5.5V, SOIC U201 IC, POWER AMP, TDF8599TH, 302183 HSOP36, PAD UP U300 IC, PWR-AMP, Class D, 20W 298092-001 U401 IC, Vreg., 5.0V, FIXED., LDO, SOIC 313374-050 U501...
  • Page 17 ELECTRICAL PART LIST IR PCB Assembly Resistors Reference Description Part Number Note Designator R1200 75 OHM, 0603, .1W, 5% 199403-750 R1201 2K, 0603, .1W, 5% 199403-202 R1202 47 OHM, 0603, SMD, 100MW, 5% 199403-470 R1203 2K, 0603, .1W, 5% 199403-202 R1204 75 OHM, 0603, .1W, 5% 199403-750...

  • Page 18: Disassembly Procedures

    DISASSEMBLY PROCEDURE 1. Grill removal 1.1 Remove the three Phillips-head screws from the bottom baseplate. 1.3 Lift the grill from the bottom allowing the tabs to release. 2. Dock Removal 1.2 Disconnect the flex cable from J1100 and remove the two screws securing the grille assembly.
  • Page 19 DISASSEMBLY PROCEDURE CONTINUED 3. Rear Cover Removal 5. DSP PCB Removal 5.1 Remove the four Phillips-head screws from the DSP board. 6. Heatsink Removal 3.1 Remove the four Phillips-head screws securing the rear cover. 6.1 Remove the three Phillips-head screws 4.
  • Page 20 DISASSEMBLY PROCEDURE CONTINUED Woofer Removal Continued. 7.1 Remove the four Phillips-head screws holding the woofer in place. 8. End Cap Removal 8.1 Carefully remove the fabric tape on both sides of the endcap. Remove the three Phillips-head screws on each side that secure endcap to the acoustic enclosure.

  • Page 21: Cosmetic Inspection After Reassembly

    Variation 0.50 Left to Right Side 1.16 When an endcap (item 10 or 13 on page 8) is replaced on the SoundDock 10, the distance between the grille and the endcap may fall out of the 1.25mm specification. During reassem- bly, ensure the distance between the endcap and the grille is 1.25mm +/- 0.75mm.

  • Page 22: Test Procedures

    1.4, except set the frequency to 800Hz and confirm that only the left driver plays. 1.3 Apply power to the SoundDock 10, the system will default to the AUX input if there is 3.2 Reduce generator output to zero volts nothing connected to the dock.
  • Page 23 1. Authorization Test touch screen. Confirm the volume goes up and down as the volume control on the 1.1 Apply AC power to the SoundDock 10 display is adjusted. system. Allow the system to power up by waiting for the boot beep sound from the speakers.

  • Page 24: Revision History

    SERVICE MANUAL REVISION HISTORY Date Revision Description of Change Change Driven B y Pages Affected Level 9/2009 Document released at revision 00 Service Manual release 10/2009 iDock and dock frame part number change. Part number change iDock from 318058-001S to 323693-001S Dock frame from 318057-001S to 323692-001S Grille part number change from 318054-001S to 323691- 001S...
  • Page 25 SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE Bose Corporation The Mountain Framingham Massachusetts USA 01701 P/N: 309505-SM Rev. 04 8/2009 (H) http://serviceops.bose.com...
  • Page 26 Variation 1.00 During reassembly of the SoundDock 10, the distance between the dock and the lens may fall out of specifica- tion. The measurement between the dock and the lens is critical to the operation of the system. If the dock and the lens are too close together, buzzing from the assembly and skipping from the iPod is possible.
  • Page 27 Subject: Software update. Disposition: There may be systems in the field that have older software, updating them to the latest version will ensure SPS and DSP board compatibility. The updates are available on the SoundDock 10 service infor- mation page.
  • Page 28 Subject: Hardware and Software update to allow low power standby on product built before a specific date of manufacture (list of DOM’s below). Note: The software on the SoundDock 10 must be updated prior to this modification. Software updates are available on the SoundDock 10 service information page (See Service Bulletin 309505-B2) Disposition: Systems built before the DOM’s below may have the original software and original SPS board.
  • Page 29 R404 R213 49.9K 191465-4992 C507 C246 .33uF VR401 C242 C255 R203 R202 C239 257154-334J16 C254 C241 R410 C203 C245 C243 C240 VR400 R406 R512 C417 C419 C413 C414 C418 R401 R412 R413 C420 C422 U401 R418 C509 C507 C252 C253 R509 C251 L201...
  • Page 30 Reason: The black plastic insulator prevents the primary component leads from arcing to the secondary side of the power supply. Solution: Inspect the SoundDock 10 by looking under the bottom plate (system does not need to be disas-   sembled) and confirm the black plastic insulator is in place. If missing, install new insulator and shield with part numbers shown below.
  • Page 31 CLASS DWG NO. REVISIONS DESCRIPTION DATE INITIAL RELEASE PETE CORTESE/ 1/10 PAUL COLLINS ADDITION OF INSULATOR PAUL COLLINS 10/10 INSPECTION SIGNATURES REQUIRED PRINT NAME SIGNATURE TSG REPRESENTATIVE PAUL COLLINS CELL LEAD ERIC KAS DAVID CORN REPAIR SUPERVISOR (________________) THER TSG TECHNICIAN DATE Pete 1/10...
  • Page 32 SoundDock 10 unit. Refer to service manual 309505-SM page 21 for more detail. Update the SoundDock 10 system with the latest SoundDock 10 Software revision software found on the Technical Services Website. Inspect the system by looking...
  • Page 33 CLASS DWG NO. 322287 REVISIONS DESCRIPTION DATE SoundDock 10 DIGITAL MUSIC SYSTEM INTERFACE BOARD INDEX 1 - COVER SHEET (THIS SHEET) 2 - DSP CONNECTOR INTERFACE 3 - IDOCK CONNECTOR INTERFACE Variation Table Var 1 name Var 2 name Var 3 name...
  • Page 34 DOCK_SPI_SIMO DOCK_SPI_SIMO DOCK_SPI_SOMI DOCK_SPI_SOMI DOCK_SPI_CLK DOCK_SPI_CLK DOCK_IO[14] DOCK_IO[14] DOCK_IO[15] DOCK_IO[15] VIDEO VIDEO DSP CONNECTOR VIDEO_RTN VIDEO_RTN INTERFACE +3_3VS DOCK_WAKEUP DOCK_WAKEUP DOCK_DETECT1 DOCK_DETECT1 DGND FRAMINGHAM, MA 01701-9168 DGND PC BOARD,SoundDock 10 DIGITAL MUSIC SYSTEM,INTERFACE PCB P/N: 322287 Sheet 2 of 3...
  • Page 35 DOCK_DETECT1 DGND DGND +3_3VS D309 BAV99DW DOCK_IO[15] DOCK_WAKEUP DOCK_SPI_SIMO DOCK_SPI_SOMI DGND +3_3VS D313 DGND BAV99DW FRAMINGHAM, MA 01701-9168 D310 BAV99DW DOCK_DETECT1 DGND PC BOARD,SoundDock 10 DIGITAL DOCK_SPI_CLK DGND MUSIC SYSTEM,INTERFACE PCB P/N: 322287 IDOCK CONNECTOR INTERFACE Sheet 3 of 3...
  • Page 36 J300 C300 D302 D301 LaserCode J302 LaserCode 322287-001...
  • Page 37 CLASS DWG NO. 322292 REVISIONS SoundDock 10 Digital Music DESCRIPTION DATE System Acoustic Package System Interconnect PROGRAMMING HEADER Installed for prototype units only. PT255130-040 SWITCHING DOCK iDOCK POWER INTERFACE (IPOD shown) DSP Board 322287-CK1-001 322289-CK1-001 SUPPLY (MAIN) 310407-CK1-001 322292-CK1-001 SPRING LOADED...
  • Page 38 174989 R212 FB200 DGND 15.0K R233 SG203 C211 SG200 FRAMINGHAM, MA 01701-9168 0ohm LEGEND SoundDock 10 DIGITAL MUSIC 180pF DIGITAL AUDIO PATH SYSTEM, PCB, DSP/IR ANALOG AUDIO PATH R218 AUX_INPUTS DGND PCB P/N: 322292 ON VOLTAGES 15.0K OFF VOLTAGES Sheet 2 of 12...
  • Page 39 DGND C314 C318 R310 B_OUT_P BINP 2.00K 1.0uF 1.0uF C312 1000pf DGND FRAMINGHAM, MA 01701-9168 LEGEND SoundDock 10 DIGITAL MUSIC DIGITAL AUDIO PATH SYSTEM, PCB, DSP/IR ANALOG AUDIO PATH PCB P/N: 322292 ON VOLTAGES Sheet 3 of 12 OFF VOLTAGES...
  • Page 40 CLASS DWG NO. 322292 Q406 FDN335N +24V FRAMINGHAM, MA 01701-9168 C428 R430 NoPop ZR402 10.0K SoundDock 10 DIGITAL MUSIC R427 +24V 5.1V D405 SYSTEM, PCB, DSP/IR DGND 10.0K PCB P/N: 322292 135247-5231 147239 VR400 Sheet 4 of 14 R406 324229-5500 +5V_DKSW 0.47 OHM...
  • Page 41 DGND DSP_TCK R601 49.9K DSP_TMS DGND DSP_TDI RESET_OUT DSP_TDO DSP_EMU1 DSP_TRST DSP_EMU0 FRAMINGHAM, MA 01701-9168 LEGEND SoundDock 10 DIGITAL MUSIC DIGITAL AUDIO PATH SYSTEM, PCB, DSP/IR ANALOG AUDIO PATH PCB P/N: 322292 ON VOLTAGES OFF VOLTAGES Sheet 5 of 12...
  • Page 42 68pF 68pF 68pF 68pF 68pF 56_EM_D14 EM_BA1_94 55_EM_D15 EM_CS0_97 EM_CS2_100 DGND DSP CONT. EM_RAS_98 EM_CAS_37 EM_WE_38 EM_CKE_71 EM_CLK_70 DSP_CLK_OUT EM_WE_DQM0_39 EM_WE_DQM1_67 EM_OE_104 EM_RW_102 FRAMINGHAM, MA 01701-9168 SoundDock 10 DIGITAL MUSIC SYSTEM, PCB, DSP/IR PCB P/N: 322292 Sheet 6 of 12...
  • Page 43 68pF 68pF 68pF 120 Ohm 60_DEV_OE TDI_34 +3_3VF 61_DEV_CLRn TMS_33 TCK_35 R807 DGND TDO_36 RESET CPLD_JTAG_TDI CPLD_JTAG_TMS C817 FRAMINGHAM, MA 01701-9168 CPLD_JTAG_TCK 22pF CPLD_JTAG_TDO SoundDock 10 DIGITAL MUSIC SYSTEM, PCB, DSP/IR DGND CPLD PCB P/N: 322292 Sheet 7 of 12...
  • Page 44 I2C_SDA/SPI_SOM 13 DOCK_SPI_SOMI_A I2C_SCL/SPI_SIM 12 DOCK_SPI_SIMO_A R842 DGND C888 100K 0.1uF DGND DGND FRAMINGHAM, MA 01701-9168 LEGEND SoundDock 10 DIGITAL MUSIC DIGITAL AUDIO PATH SYSTEM, PCB, DSP/IR ANALOG AUDIO PATH ON VOLTAGES PCB P/N: 322292 OFF VOLTAGES Sheet 8 of 12...
  • Page 45 49.9 33nF 1000pf VMON_DCF_AMP1 DGND VMON_5V VMON_3V3 DGND VMON_1V2 FRAMINGHAM, MA 01701-9168 C923 68pF LEGEND SoundDock 10 DIGITAL MUSIC DIGITAL AUDIO PATH SYSTEM, PCB, DSP/IR DGND ANALOG AUDIO PATH PCB P/N: 322292 ON VOLTAGES OFF VOLTAGES Sheet 9 of 12...
  • Page 46 C1001 47pF 47pF DGND PROGRAMMING HEADER DGND DGND DGND USB_10 FRAMINGHAM, MA 01701-9168 LEGEND SoundDock 10 DIGITAL MUSIC DIGITAL AUDIO PATH ANALOG AUDIO PATH CONNECTOR INTERFACE SYSTEM, PCB, DSP/IR ON VOLTAGES PCB P/N: 322292 OFF VOLTAGES Sheet 10 of 12...
  • Page 47 +3_3VS SG1153 SG1164 VIDEO SG1154 SG1165 VIDEO_RTN SG1155 SG1166 SG1156 SG1167 DOCK_WAKEUP SG1157 SG1168 DOCK_DETECT1 SG1158 SG1169 R1105 SG1170 SG1159 DGND FRAMINGHAM, MA 01701-9168 DGND SoundDock 10 DIGITAL MUSIC DGND SYSTEM, PCB, DSP/IR PCB P/N: 322292 Sheet 11 of 12...
  • Page 48 4 SPARKS GAPS MADE OF COPPER PLANE SG1211 SG1212 SG1213 SG1214 SG1215 SG1216 SG1217 SG1218 SG1219 SG1220 SG1221 FRAMINGHAM, MA 01701-9168 BOARD EDGE BOARD EDGE SoundDock 10 DIGITAL MUSIC PC BOARD,IR SYSTEM, PCB, DSP/IR PCB P/N: 322292 Sheet 12 of 12...
  • Page 49 ZR1000 C418 R1103 FB1004 R1004 R1104 R1003 D1003 D1000 R421 J1100 FB1003 C1100 FB1002 C1007 R422 C1006 FB1000 SoundDock 10 DIGITAL MUSIC SYSTEM SoundDock 10 DIGITAL MUSIC SYSTEM DSP/IR PCB BOTTOM SIDE P/N: 322292 DSP/IR PCB TOP SIDE P/N: 322292...
  • Page 50 U603 PIN 2 (AUDIO_MASTER_CLK) U7000 PIN 24 (AUDIO_BIT_CLK) U2 PIN 6 (PS_SYNCH_CLK1)
  • Page 51 268381-004 D400 NO-POP U400 NO-POP 254187-001 NO-POP Q400 NO-POP NO-POP 314923-001 311141-151BK VR400 NO-POP 311141-151BK NO-POP 311141-115BK VR401 311141-151BK JP401 319408-001 NO-POP NO-POP FRAMINGHAM, MA 01701-9168 SoundDock 10 DIGITAL MUSIC SYSTEM, PCB, SPS PCB P/N: 322642 Sheet 1 of 6...
  • Page 52 C223 C228 0.1uF 0.1uF NoPop FAIL OPEN FAIL OPEN NoPop FRAMINGHAM, MA 01701-9168 LEGEND ROUTN SoundDock 10 DIGITAL MUSIC DIGITAL AUDIO PATH ANALOG AUDIO PATH ROUTP SYSTEM, PCB, SPS ON VOLTAGES PCB P/N: 322642 OFF VOLTAGES Sheet 2 of 6...
  • Page 53 221K 221K 221K 221K DCF_AMP2 DCF_AMP1 C318 R305 C323 R313 10.0K 10.0K FRAMINGHAM, MA 01701-9168 LEGEND SoundDock 10 DIGITAL MUSIC DIGITAL AUDIO PATH ANALOG AUDIO PATH SYSTEM, PCB, SPS ON VOLTAGES PCB P/N: 322642 OFF VOLTAGES Sheet 3 of 6...
  • Page 54 FAIL OPEN BINN BINP C419 C417 D400 100pF 100pF BAT54SW NoPop NoPop FRAMINGHAM, MA 01701-9168 LEGEND SoundDock 10 DIGITAL MUSIC DIGITAL AUDIO PATH ANALOG AUDIO PATH SYSTEM, PCB, SPS ON VOLTAGES PCB P/N: 322642 OFF VOLTAGES Sheet 4 of 6...
  • Page 55 R502 56pF C504 R562 220K 220pF R522 220K AC_GND 1.18K T501 AC_GND FRAMINGHAM, MA 01701-9168 LEGEND SoundDock 10 DIGITAL MUSIC DIGITAL AUDIO PATH ANALOG AUDIO PATH SYSTEM, PCB, SPS ON VOLTAGES PCB P/N: 322642 OFF VOLTAGES Sheet 5 of 6...
  • Page 56 R526 R525 R545 C532 R547 1Meg 47uF 1.33K 20.0K AC_GND 3.92K AC_GND FRAMINGHAM, MA 01701-9168 LEGEND SoundDock 10 DIGITAL MUSIC DIGITAL AUDIO PATH ANALOG AUDIO PATH SYSTEM, PCB, SPS ON VOLTAGES PCB P/N: 322642 OFF VOLTAGES Sheet 6 of 6...
  • Page 57 R528 R566 C339 C312 R526 C313 C320 R310 Q505 C321 R311 C334 C332 C222 J201 C227 C223 C228 SoundDock 10 DIGITAL MUSIC SYSTEM SoundDock 10 DIGITAL MUSIC SYSTEM SPS PCB BOTTOM SIDE P/N: 322642 SPS PCB TOP SIDE P/N: 322642...
  • Page 58 U504 PIN 12...
  • Page 59 SoundDock 10 Theory of Operation Power Amplifier Power Amplifier electronics integrated into same PCB as 24V switching power supply Class ‘D’ switching amplifiers drive 3 audio channels TI TPA3100D2 drives stereo “twiddler” transducers NXP TDF8599TH drives single woofer channel (dual channel amplifier configured for mono operation with paralleled outputs)
  • Page 60 SoundDock 10 Theory of Operation Amplifier Characteristics Supply voltage: +24V Full scale output (after filter): 18V peak into 1.5 ohms for bass 14V peak into 3.5 ohms for twiddlers Full scale input from DSP: 0.95V for bass 1.5V for twiddler channels...
  • Page 61 SoundDock 10 Theory of Operation Output Filters Twiddler channels: • Nominal diff mode inductance: 11.5uH • Capacitance: 0.5uF • Resonant frequency: ~66kHz • DM attenuation at 288kHz: >20dB • CM attenuation at 288kHz: >40dB • C332, C334, and R317 provide damping for common-mode transients on start-up Bass channel: •...
  • Page 62 TDF8599 Pulls DIAG signal low on short circuit detect, over-current, over- temperature, or over/under-voltage Exact cause of fault reported on I2C bus (not available on SoundDock 10) TPA3100 Sets FAULT pin high on short circuit detect FAULT detect may also be caused by overheating...
  • Page 63 SoundDock 10 Theory of Operation DC Offset Detection DC Offset Detection protects against unsafe transducer overheating caused by excessive DC voltages across voice-coil Simple resistor summing circuit adds outputs of all three amplifier channels together, DCF_AMP1 and DCF_AMP2 signals routed to ADC on DSP board...
  • Page 64 SoundDock 10 Theory of Operation DSP power modes Normal- flyback running off +24V powering DSP board Low Power standby- +24V reduced below 7V; flyback controller off Charging standby- flyback running off +24V powering DSP board, but all processes idle except for iPod charging...
  • Page 65 SoundDock 10 Theory of Operation Flyback supply Flyback operation • schottky Turns Flyback 24V is the SPS supply voltage 1.2V is the regulated output 15 is the turns ratio 0.5V is the forward drop of the Schottky diode...
  • Page 66 SoundDock 10 Theory of Operation Microcontroller supply voltage +3.3V supply for PIC micro-controller Always on +24V reduced to below 7V in low power mode iPod Charging +5V_DKSW is the iPod charging voltage ZR400, R431-432 and Q406-407 are the over voltage protection for iPhone...
  • Page 67 SoundDock 10 Theory of Operation +3.3VS & +5Va,b,c supplies U401-403 are basic low-dropout linear regulators +5Va,b,c to run DACs, ADCs, and op-amps 3.3VS run all 3.3V logic except PIC and some dock functions AUX ADC...
  • Page 68 SoundDock 10 Theory of Operation ADC Signal conditioning U201 takes signal & subtracts AUX_COM to reduce noise U202 inverts U201’s output & creates a differential signal to drive the ADC U202’s noise is common mode, & subtracted out by the ADC’s own differential...
  • Page 69 SoundDock 10 Theory of Operation 18 MHz system clock found at TP610 4 MHz PIC clock found at TP646 & TP956...
  • Page 70 SoundDock 10 Theory of Operation iDock ADC IPOD_COMM is connected to both “+” op-amp inputs so that the iPod ground noise is subtracted from the L & R signals...
  • Page 71 SoundDock 10 Theory of Operation SoundDock 10 Theory of Operation SPS Board AC Connector (J400) The AC Connector is our standard polarized connector with enclosed leads. Care has been taken to put extra holes in the board to increase spacing from line to neutral and to expel liquids should they be spilt on the board.
  • Page 72 SoundDock 10 Theory of Operation (Q400). R406, R409, and R410 are 3 discrete resistors in series rather than a single resistor so that we do not exceed the maximum voltage rating of the resistors. R400, R401, R402, and C401 AC couple the line voltage into the D400 rectifying diode which charges C408.
  • Page 73 SoundDock 10 Theory of Operation package when the SPS board is operated on a lab bench at higher (>1A/25W) power levels. Output Inductor (L502) The output inductor works in conjunction with the output capacitor (C521) to filter the output voltage. This inductor works well away from its saturation point and is adequately sized to keep the output voltage ripple to a minimum.
  • Page 74 SoundDock 10 Theory of Operation When Big Max transitions from playing audio (or charging standby) to low power standby, the DSP module begins to pulse width modulate BIGMAX_OFF with a duty cycle that ramps continuously from 0% to 100%. The pulse width modulated signal is low-pass filtered by R559 and C549 to provide a DC voltage at TP577 that is proportional to the duty cycle of BIGMAX_OFF.
  • Page 75 SoundDock 10 Theory of Operation Gate Driver (U504) Simply takes the PWM inputs and translates them into an output voltage that each of the MOSFET’s can use. It also makes sure that both MOSFET’s are never turned on at the same time.
  • Page 76 SoundDock 10 Theory of Operation is set by R505. The sync pulse, when applied through the DSP to OL_PS_SYNCH_CLK, sets the output switching frequency to 192kHz. Peak Detect Circuitry This circuitry peak detects the output of the isolation pulse transformer on the primary side and uses the absence or presence of pulses to shift a threshold in the PWM controller.
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