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Companion

®

5 Multimedia

Speaker System

Theory of Operation

CONTENTS

Product Description and Overview ................................................................................................2
Power Supplies, Block Diagram ......................................................................................................3
Power Supply, VSNUB ......................................................................................................................4
Power Supply, VRAW.........................................................................................................................5
Power Supply 5V and 10V Regulators ............................................................................................6
Power Supply 1.2V Regulator ..........................................................................................................7
Power Supply 3.3V Regulator ..........................................................................................................8
Sensor and Power Failure Detection .............................................................................................9
USB Controller ........................................................................................................................... 10-11
Audio Interface ................................................................................................................................ 12
Miscellaneous Control ...................................................................................................................13
Digital Signal Processor ................................................................................................................14
Conversion and Ramp Generation ......................................................................................... 15-16
Audio Path ................................................................................................................................. 17-20
Power Amplifiers .............................................................................................................................21
Headphone Amplifier ...................................................................................................................... 22
Block Diagram .................................................................................................................................23

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Summary of Contents for Companion 5

Page 1: ... 2006 Bose Corporation Reference Number 290177 SM Rev 03 Service Manual Companion 5 Multimedia Speaker System Electronic Copy Only ...

Page 2: ...al Part List Bass Module I O PCB 16 Disassembly Procedures 17 18 Audio Test Procedures 19 20 USB Test Procedures 21 Service Manual Revision History 22 CAUTION The Companion 5 Multimedia Speaker 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 INFORMATI...

Page 3: ...uired to enjoy 5 1 channel audio content from the host PC The two speaker arrays combined with advanced audio processing algorithms provide a spacious presentation of stereo content and a compelling experience with multi channel content A control module brings the master volume control simple touch mute control and jacks for an auxiliary analog stereo input and headphones The Companion 5 system co...

Page 4: ...h resistant satin finish vinyl Satellites Painted polymer finish Bass Box Ported Bass Box Port Tuning 50 Hz Electrical Power Rating USA Canada 115 VAC 60 Hz Japan 100 VAC 50 60 Hz Euro 230 VAC 50 60 Hz Nominal System Bandwidth 48 Hz to 18 kHz Maximum SPL 102 dBSPL at normal listening distance Output Bass 48Hz 250Hz Satellites 250Hz 18Khz USB USB 2 0 full speed device with B receptacle Supports 6 c...

Page 5: ... shock fire and or other hazards 4 This part is available as finished goods Order this part using the product code listed 5 This part is referenced for informational purposes only It is not stocked as a repair part 6 RoHS compliant part Restriction of Hazardous Substances RoHS is a directive of the European Union which took effect July 1 2006 The directive is aimed at protecting the health and env...

Page 6: ...ACKING FOAM EPS 295570 7 LINE CORD 120V PDL DET BLK LINE CORD 100V DET NONPVC BLK LINE CORD 230V UKS DET BLK LINE CORD 240V AUS DET BLK LINE CORD 220V EUR DET BLK 262814 001 286080 001 280138 001 284243 001 280135 001 3 8 GUIDE OWNERS COMP5 3L 295925 9 CABLE USB 2 0 TYPE A TO B 6FT CABLE USB 2 0 TYPE A TO B 10FT 292477 001 292477 002 10 FOOT RUBBER PSA BACKED 4 PACK 297482 001 11 PACKING FOAM EPS ...

Page 7: ...001 1 6 COVER REAR BASS MODULE 296122 002 1 5 7 FOAM GRILLE ARRAY 125 272036 002 6 8 HARNESS USB TYPE B TO MINI B 296603 001 1 9 PAD FOAM 25 X 75 X 06 278144 001 2 10 PCB ASSY INPUT OUTPUT US JAPAN PCB ASY INPUT OUTPUT ROHS EURO 299764 001 299765 002 1 11 BRACKET INPUT OUTPUT PCB 292181 002 1 5 12 SCREW TAPP 8 11x 437 PAN XRC S 289388 007 9 5 13 HARNESS IDC FLAT CABLE 291575 088 1 14 SCREW TAPP 8 ...

Page 8: ...03 1W 5 199403 100 R0056 365 OHM 0603 1W 1 191465 3650 R0057 11K 0603 1W 1 191465 1102 R0059 2K 0603 1W 1 191465 2001 R0060 7 87K 0603 1W 1 191465 7871 R0150 3 9K ARRAY SMT 4 POS 5 186433 3924 R0151 8 25K 0603 1W 1 191465 8251 R0152 8 25K 0603 1W 1 191465 8251 R0162 3 32 OHM 0603 1W 1 191465 3R32 R0163 3 32 OHM 0603 1W 1 191465 3R32 R0164 3 32 OHM 0603 1W 1 191465 3R32 R0165 3 32 OHM 0603 1W 1 191...

Page 9: ...824 R4301 1 8K ARRAY SMT 4 POS 5 186433 1824 R4302 1 8K ARRAY SMT 4 POS 5 186433 1824 R6000 3 09K 0603 1W 1 191465 3091 R6001 10 OHM 0603 1W 5 199403 100 R6002 2K 0603 1W 1 191465 2001 R6003 2K 0603 1W 1 191465 2001 R6005 4 7K 0603 1W 5 199403 472 R6006 100 OHM ARRAY SMT 4 POS 5 186433 1014 R6008 100 OHM ARRAY SMT 4 POS 5 186433 1014 R6009 15 OHM 0603 1W 5 199403 150 R6010 100 OHM 0603 1W 5 199403...

Page 10: ...OHM 0603 1W 5 199403 101 R8000 27 4 OHM 0603 1W 1 191465 27R4 R8001 27 4 OHM 0603 1W 1 191465 27R4 R8002 1 5K 0603 SMD 100MW 5 199403 152 R9232 39K 0603 SMD 100MW 5 199403 393 R9233 4 7K 0603 1W 5 199403 472 R9235 23 7K 0603 1W 1 191465 2372 R9236 7 15K 0603 1W 1 191465 7151 R9237 16 5K 0603 1W 1 191465 1652 R9238 1 82K 0603 1 10W 1 191465 1821 R9240 10K 0603 1W 5 199403 103 RQ1 1M 1206 1 4W 5 124...

Page 11: ...33 C0099 100pF 0805 COG 50V 5 133622 101 C0151 33000pF X7R SMD 0603 25V 257154 333K25 C0152 01uF 0603 X7R 50V 1 191470 103 C0153 01uF 0603 X7R 50V 1 191470 103 C0154 01uF 0603 X7R 50V 1 191470 103 C0155 01uF 0603 X7R 50V 1 191470 103 C0156 1uF EL 85C 50V 20 177902 010H C0157 1uF EL 85C 50V 20 177902 010H C0158 560pF 0603 X7R 50V 10 191470 561 C0159 1uF EL 85C 50V 20 177902 010H C0160 1uF EL 85C 50...

Page 12: ...03 33000pF X7R SMD 0603 25V 257154 333K25 C4004 2 2uF EL 85C 35V 20 177902 2R2H C4005 33000pF X7R SMD 0603 25V 257154 333K25 C4006 33000pF X7R SMD 0603 25V 257154 333K25 C4300 1000pF 0603 X7R 50V 10 191470 102 C4301 1000pF 0603 X7R 50V 10 191470 102 C4302 1000pF 0603 X7R 50V 10 191470 102 C4303 1000pF 0603 X7R 50V 10 191470 102 C4304 1000pF 0603 X7R 50V 10 191470 102 C4305 1000pF 0603 X7R 50V 10 1...

Page 13: ...3 25V 257154 333K25 C7006 33000pF X7R SMD 0603 25V 257154 333K25 C7100 33000pF X7R SMD 0603 25V 257154 333K25 C8000 47pF 0805 COG 50V 5 133622 470 C8001 47pF 0805 COG 50V 5 133622 470 C9209 33000pF X7R SMD 0603 25V 257154 333K25 C9211 01uF 0603 X7R 50V 10 191470 103 C9212 015uF 0603 X7R 50V 10 191470 153 C9213 100uF EL 85 10V 20 177902 101A C9219 047uF 0805 X7R 50V 10 133623 473 C9220 10pF 0603 CO...

Page 14: ... 135247 5239 Transistors Reference Designator Description Part Number Note Q0010 MFET 60V 27A NON ISOLAT 271765 002 Q0011 XSISTOR BPLR N 40V 200mA SOT23 146819 Q0012 XSISTOR BPLR N 40V 200mA SOT23 146819 Q0024 XSISTOR BPLR N 40V 200mA SOT23 146819 Q0030 XSISTOR BPLR P 40V 200mA SOT23 148596 Q0030 XSISTOR BPLR P 40V 200mA SOT23 RoHS 287939 001 6 Q0031 XSISTOR BPLR N 50V 100mA SOT23 146817 Q0031 XSI...

Page 15: ...47 001 U250 IC POWER AMP PSO 20 TDA8566TH 257975 U250 IC POWER AMP PSO 20 TDA8566 RoHS 289447 001 U350 IC POWER AMP PSO 20 TDA8566TH 257975 U350 IC POWER AMP PSO 20 TDA8566 RoHS 289447 001 U902 BUCKCTLR SO 8 PWM 500kH 40V 5 275415 004 U1000 IC OP AMP DUAL RAIL TO RAIL 277563 001 U4000 IC CODEC AUDIO 24 bit 289863 001 U6000 IC MICRO CONTROLLER 8 BIT 289864 001 U6001 IC ET SOT 23 MAX809 2 63V 191158...

Page 16: ...OR 273692 001 J2 CONN HEADER LOCKING TOP KEYED 271897 002 3 J3 CONN HEADER DUAL ROW R A 278156 04 J4 CONN HDR DUAL ROW R A RED 278156 204 J5 CONN HDR DUAL ROW R A BLK 278156 110 J21 CONN LOCKNG 2 5MM 8POS LOC PIN 283142 010108 J22 CONN HEADER 2 5MM THRU 16 POS 270584 016 Miscellaneous Reference Designator Description Part Number Note R20 10K POTENTIOMETER 1B 20 273741 001 R24 RES CF 1 4W 5 10K 120...

Page 17: ...re both inside the cabinet and cannot be re placed 1 DSP board removal 1 1 Remove the four phillips head screws from the rear cover 1 2 Pull the rear cover down and remove the cables connected to J2 J21 and J22 on the I O board and J8000 from the DSP board 1 3 Remove the four Phillips head screws located to the left and right of the heatsink 1 4 Remove the cables connected to J350 and J10 this all...

Page 18: ...trol off of the rear cabinet 2 2 Remove the three Phillips head screws that secure the I O board in place 2 3 Remove the plastic bracket that secures the I O board in place 1 5 Remove the four 6 32 TORX screws that holds the heatsink bracket in place 1 6 Separate the heatsink heatsink bracket and DSP board ...

Page 19: ...d the heat sink connectors and at the woofer mounting location PASS if no audible air leaks can be heard at a distance 1 ft from any exterior surface of the Bass module FAIL if air leaks can be heard at a distance 1 ft from any exterior surface of the Bass module 1 4 Repair any air leaks around the heat sink and connectors Replace any bass module that has air leaks around the bass box or woofer mo...

Page 20: ...z to 2kHz 50mVrms 2kHz to 5kHz 25mVrms 4 4 Replace any satellite that is found to be defective 5 Satellite Air Leak Test 5 1 Apply a 60 mVrms 300 Hz signal to the input of the bass module 5 2 Set the volume knob on the control pod to maximum fully clockwise and set the bass control to it s center detent flat position 5 3 Listen carefully for air leaks along edges of the satellite and near the gril...

Page 21: ... be connected before power is applied 3 Adjust the control pod to minimum 4 Connect the power cord to an AC outlet 5 Connect the USB cable from a computer with USB 2 0 to the USB input on the bass module 1 Adjust the Windows volume and wave controls to maximum 1 1 Use Windows media player or equivalent to play an musical audio track 1 2 Adjust volume on the control pod to one quarter 1 3 Confirm a...

Page 22: ... for Bass Module changed Changed part number for the Carton RSC Change R19 from 191465 2942 to 191465 3162 O ld number 290172 0139CS 290172 0239CS New number 290172 S139 290172 S239 O ld number 295572 New part number 300267 7 5 5 11 27 07 02 29 08 06 03 09 1 18 09 03 Part number change for DSP board From 299766 001 to 299766 201 From 299767 002 to 303250 102 Changed the Euro DSP part number again ...

Page 23: ...SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE Bose Corporation The Mountain Framingham Massachusetts USA 01701 P N 290177 SM Rev 03 12 2006 H http serviceops bose com ...

Page 24: ...TP81 R5 NV 220K C12 NV 0 022uF TP22 TP29 TP10 TP18 ZR1 NV 5 6V TP34 TP26 TP25 U1 NV 10 9 8 R9 NV 1K R4 NV 68 1K R8 NV 33 TP9 TP83 IOGND R23 NV 1 00K Q1 NV 1 3 2 U1 NV 13 12 11 14 7 C3 NV 0 022uF C10 NV 100pF R2 NV 68 1k TP3 LK1 C9 NV 0 022uF J1 1 2 TP82 TP23 U4 NV 1_clear 1 2_Q0 2 3_D0 3 4_D1 4 5_Q1 5 6_D2 6 7_Q2 7 8_GND 8 CLOCK_9 9 Q3_10 10 D3_11 11 Q4_12 12 D4_13 13 D5_14 14 Q5_15 15 VCC_16 16 T...

Page 25: ...N A CAT CODE SHEET OF B SD 32108 2 1 A 10V HPLEFT HPRIGHT AUXLEFT AUXRIGHT SENSOR VOLUME BOSELINK RMTGND MUTE 2 2 01 290179 2 290179 10V IOGND 290179 TP36 TP37 TP38 TP39 TP40 TP41 TP42 TP43 TP49 TP51 TP52 TP53 TP54 TP55 TP56 TP62 TP63 TP64 TP65 TP74 J3 1 2 3 4 R21 NV 10K TP80 R20 10K 1 2 3 J22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 J4 1 2 3 4 J21 1 2 3 4 5 6 7 8 R24 10k J5 1 2 3 4 5 6 7 8 9 10 11 ...

Page 26: ...V R4001 100 3 3V R4000 4 7 C4004 2 2uF C4006 033uF C1005 100pF 10V U4000 289863 001 SDOS_1 2_I2C 3_SMUTE 4_BICK 5_LRCK 6_SDTI1 7_SDTI2 8_SDTI3 SDTO_9 DAUX_10 11_DFS0 12_TST1 13_DZFE 14_TVDD 15_DVDD 16_DVSS 17_PDN 18_TST2 CAD1_19 CAD0_20 21_TST3 22_TST4 LOUT3_23 ROUT3_24 LOUT2_25 ROUT2_26 LOUT1_27 ROUT1_28 29_TST5 30_NC 31_LIN 32_RIN DZF2_OVF_33 34_VCOM VREFH_35 AVDD_36 AVSS_37 DZF1_38 39_MCLK 40_P...

Page 27: ...ATO_38 MCLKO1_39 MCLKO2_40 RESET_41 VREN_42 SDA_43 SCL_44 45_AVSS 46_XTALO 47_XTALI 48_PLLFILI GND GND GND Q6102 146818 B C E 3 3V R6201 7 87K U7000 289857 705 23_OSCIN 24_OSCOUT 25_OSCVDD 22_OSCVSS 17_CLKIN 35_TCK 19_TMS 28_TDI 29_TDO 21_TRST 32_EMU0 34_EMU1 RESET_14 PLLHV_27 U6002 293549 064D 1_A0 2_A1 3_A2 4_GND SDA_5 SCL_6 WP_7 VCC_8 Q6202 146819 R6209 4 7K TEMPSEN1 GND X6000 HC 49 S R7000 2 0...

Page 28: ...5 6 7 8 MODE GND VRAW 14V AMPGND LS C156 1uF GND C355 0 01uF GND C252 0 01uF R362 3 32 C259 1uF BASS2 GND RC R451 47K BASS2 3 3V C254 0 01uF 3 3V C160 1uF RC GND RS LS GND Q450 146819 C354 0 01uF GND GND BASS1 LC R264 3 32 AMPGND D450 135247 5231 5 1V C256 1uF C352 0 01uF R163 3 32 C257 1uF R263 3 32 C151 033uF C251 033uF C351 033uF C358 560pF C158 560pF C161 560pF C258 560pF C261 560pF 00 290178 ...

Page 29: ...TMS320DA705 8_CVDD 16_CVDD 20_CVDD 33_CVDD 44_CVDD 53_CVDD 57_CVDD 65_CVDD 77_CVDD 85_CVDD 90_CVDD 101_CVDD 123_CVDD 128_CVDD 132_CVDD 1_VSS 6_VSS 13_VSS 15_VSS 18_VSS 26_VSS 30_VSS 36_VSS 40_VSS 47_VSS 54_VSS 62_VSS 69_VSS 72_VSS 78_VSS 82_VSS 87_VSS 95_VSS 99_VSS 106_VSS 109_VSS 114_VSS 118_VSS 124_VSS 129_VSS 133_VSS 140_VSS 145_VSS DVDD_136 DVDD_125 DVDD_112 DVDD_103 DVDD_92 DVDD_81 DVDD_73 DV...

Page 30: ... U250 C259 C4300 C4309 C4000 C4004 L7002 D10 C14 NV C256 C260 R250 U11 U50 C50 C28 C60 L50 C7000 L7000 R6006 R6008 U6002 RT6206 U350 C257 C357 R350 C9211 R52 C9210 NV C9212 R9235 R9236 R9237 C9213 C9219 R9238 Q6001 R6010 X6000 U6000 R6011 R6013 J10 C 1 0 C356 ZR6220 C 4 8 Q9031 L902 R6154 NV R6152 NV ZR6150 NV C6006 C61 C6150 NV R6101 R6103 R6150 NV C8000 D6201 C17 NV J150 C49 C1001 C1000 R1007 R1...

Page 31: ...04 R7005 C6201 C7002 Q6201 D14 NV C358 C451 NV R351 R21 C4001 C56 NV C57 C59 C62 R20 R51 NV R54 R56 R57 R60 C29 L4001 Q6203 R6211 R7002 U51 C7004 C7005 J1001 NV R6012 R6002 R6003 C258 R251 U902 C51 C54 C55 C63 C64 D9200 R50 R59 Q6152 NV R55 R6222 C6004 C6005 Q6153 NV R6157 NV C6000 C6001 C6002 C6003 C6008 R6000 R6001 C6007 L6000 Q6101 R6005 R6102 LK1 C6220 R6220 R6221 C9209 C9220 Q9032 R9232 R9233...

Page 32: ...G REPRESENTATIVE PAUL COLLINS CELL LEAD DAVID MIKEL REPAIR SUPERVISOR KEVIN KING OTHER ________________ TSG TECHNICIAN Pete Cortese DATE 4 09 FRAMINGHAM MA 01701 9168 APPLICABLE DOCUMENTS DESCRIPTION Companion 5 Multimedia Speaker System Troubleshooting Tips SERVICE MANUAL 290177 SM SIZE A FSCM 32108 CLASS FM DWG NO 290177 TT REV 01 PAGE 1 OF 2 ...

Page 33: ...6V is present replace U50 and U51 with part numbers 288281 001 and 289259 001 respectively Companion 5 Dead unit Check F1 on the I O PCB Using a multi meter to check F1 for continuity If there is no continuity replace the fuse with p n 269855 02000 Companion 5 No audio or volume control from the computer Make sure the computer and the Companion are synchronized If all cables are connected and seat...

Page 34: ...ower Supply VRAW 5 Power Supply 5V and 10V Regulators 6 Power Supply 1 2V Regulator 7 Power Supply 3 3V Regulator 8 Sensor and Power Failure Detection 9 USB Controller 10 11 Audio Interface 12 Miscellaneous Control 13 Digital Signal Processor 14 Conversion and Ramp Generation 15 16 Audio Path 17 20 Power Amplifiers 21 Headphone Amplifier 22 Block Diagram 23 ...

Page 35: ...serviceable An electronics enclosure is provided at the back of the MDF enclosure The heat sink assembly that includes the DSP Power Amplifier Power Supply Printed Circuit Assembly aluminum heat sink thermal compound thermal interface material and clamping bracket are screwed directly to the back wall of the acoustic enclosure Internal cables connect the DSP PA PS assembly to the transformer secon...

Page 36: ...ge is present whenever the bass module is plugged into the wall All the voltage level source are listed in following table Node Name Output Voltage nominal Type Input from Outputs to Vsnub 26 Full wave rectifier transformer secondary Vraw Vraw 14 no load pre regulator output VSNUB Power Amplifiers 5V VRAWSEN 10V 10 linear VSNUB Headphone power amplifiers control module green LED 5V 5 linear Vraw C...

Page 37: ...8 to track closely to the peak secondary potential This is substantially higher than the peak potential of the quasi regulated Vraw supply discussed below VSNUB also serves as a clamping potential into which some of the energy stored in the leakage reactance of the mains transformer is discharged when Q10 is switched off This additionally energy can cause the peak potential for V UNREG to actually...

Page 38: ...orm a 6 0V reference potential for the error amplifier formed by Q11 Q12 R11 R12 and R13 scale this reference voltage to an appropriate potential to permit start up of the circuit R11 doubles as the feed back resistor that sets the hysteresis mentioned above R18 and R19 are essentially in parallel when Q10 is on so R18 R19 and R14 set a relatively constant turn off potential When Q10 is off R18 de...

Page 39: ...is driven by this potential Q30 Q31 and associated components for an enable circuit for the linear regulator U20 These components permit U20 to be disconnected from Vsnub during stand by operation thus avoiding the quiescent dissipation of U20 during these conditions 5V The only internal power requirement for 5 volts are the CODEC U4000 power supply and the current source for the ramp circuit form...

Page 40: ...60 establish the DC operating voltage for the output R56 R59 C62 C63 and C64 provide the compensation for the feedback path C59 filters the 10 volt reference internal to U50 which is used to control the switching of the transistor drive signals C57 provides the boot strap boost potential to drive the high side switch C54 filters the 5 volt reference also generated internally to U50 R52 sets the op...

Page 41: ...or Q9031 Q9032 D9200 R9240 and C9220 provide a boot strapped circuit to speed the turn off of Q9031 R9236 and R9237 form a potential divider to establish the DC operating point of the regulator at 3 3 volts C9202 provides a lead compensation in the feedback circuit R9238 limits the frequency range of the lead compensation C9211 is applied around the error amplifier of the TL5001 to create a lag co...

Page 42: ...Power Failure Detection Detection of power failures is accomplished with U6001 a Maxim MAX809 undervoltage detection IC U6001 directly monitors the 3 3Volt supply which is used by the USB controller U6000 the DSP I O circuitry U7000 and the CODEC digital circuitry U4000 In order to prevent an undetected disruption of the DSP due to loss of the core power supply the SOFTSTART signal from U50 is use...

Page 43: ...is document A separate 24 576MHz clock is provided for driving the DSP In order minimize jitter on the output of the phase locked loop a filter for the PLL power supply is created with the components R6009 C61 and C6001 The PLL dynamics are controlled by the compensation components C6002 C6003 and R6000 USB Interface The tolerance of the impedance into which the USB data signals D D must be termin...

Page 44: ...d provides the clock and command address portions of all instructions The DSP always behaves as the slave device on this interface Booting EEROM The logic state of pins U7000 108 110 111 are selected to permit booting from the external EEROM U7001 using the I2C protocol The proper state of pins 108 and 111 depend on the I2C pins of U6000 being idle when DSPRESET is released The DSP will take appro...

Page 45: ...ler U6000 DSP U7000 and CODEC U4000 The USB controller is the clock master for the TDM paths Only one clock domain exists for exchange of audio information The USB controller is responsible for synchronizing the local TDM data rate with the data rate from the USB host when the host is active When no host is connected or when the con nected host is suspended the USB controller is responsible to pro...

Page 46: ...he system be placed into stand by and VRAWON driven low DSPRESET is an active low signal driven by pin 41 of U6000 This pin is active low at initial application of power to U6000 keeping the DSP in reset until U6000 has completed initialization The signal is then negated high The USB controller will reset the DSP just prior to entering stand by mode of operation Transistor Q6101 inverts the MUTE s...

Page 47: ...al sensors clip detection transducer DC offset protection ETAP command processing and response generation are performed by the DSP DSP Clock The 24 576MHz DSP clock is provided by U6000 The clock is applied prior to U6000 releasing the DSPRESET line DSP Reset Reset for U7000 is controlled solely by the USB controller U6000 through the DSPRESET signal applied to U7000 14 The DSP is held in reset af...

Page 48: ... R6207 charges the capacitor at a constant rate The capacitor potential should cross 3 3 volts after 1 33 milliseconds but before 1 67 milliseconds at which time it will again be discharged by DISCHG pulse Signal Conversion The ramping voltage waveform generated on C6201 is compared to each of the analog signals by independent comparators all part of U6200 The logical output of each comparator is ...

Page 49: ...nts relative to full scale This calibration cycle is performed at a regular interval and can be observed by looking at the VRAWSEN signal Under normal input line conditions VRAWSEN will be signifi cantly below 3 3 volts except for the calibration cycle when it will step to 3 3 volts for the duration of the cycle Analog Signal Converted Signal DSP U7000 input pin Use BEQ CPBCP 113 BEQ CPBCP 115 Bas...

Page 50: ...sing the Windows or application volume control on the connected PC or by using the volume control available on the device connected theAUX input Miscellaneous I O The DSP receives warning of a USB audio data checksum error on the BADDATAinput U7000 138 USBINT is used to signal other errors It is present on pin U7000 127 The PowerAmplifier Clip Detect output are monitored by the signals CCLIP and B...

Page 51: ...o Inputs and Outputs The DSP receives warning of a USB audio data checksum error on the BADDATA input U7000 138 All other connections to the USB controller and DSP are to implement the TDM audio path Six channels of audio output are provided by the CODEC These six outputs are filtered to remove out of band noise and attenuated 7 5dB to reduce the overall gain of the system and AC coupled to the si...

Page 52: ...s are used for different paths The frame sync FCLK is generated by the USB controller U6000 35 This signal is high for the first bit MSB of the first audio sample transmitted in each frame The frame rate is set at 48kHz Each of up to six audio samples is transmitted in sequence followed by two null samples Each audio sample is left justified in a field of 32 bits The eight total samples of 32 bits...

Page 53: ...troller to the DSP on the TDM data line connected to U6000 38 unnamed on the schematic Slot Assignments for data from the USB Controller to the DSP are Time Slot Audio Data 1 Left 2 Right 3 Center 4 LFE 5 Left Surround 6 Right Surround 7 Not Used 8 Not Used DSP audio output Audio information is transmitted to the CODEC from the DSP on TDM data line DA_DATA1 U7000 134 Slot assignments for Audio dat...

Page 54: ...250 drives the B coil of the bass transducer and the outer surround transducer of the right array U350 drives the A coil of the bass transducer and the outer transducer of the left array Mode The MODE input on pin 20 of the devices mutes the power amplifiers when the potential at the pin is between 3 3 and 6 4 volts When muted the power amplifiers remain biased and the outputs active The power amp...

Page 55: ... of the amplifier circuit will cause the worst case output voltage from the headphone amplifiers to from 1 15 to 5 35 volts or 4 2 volts peak to peak The bias potential present at the output of the headphone amplifiers is removed from the headphone signals by C1008 and C1008 The signals at the cathodes of these capacitors will be balanced around the GND reference The signal RMTRET present at both ...

Page 56: ...s EEPROM I2C Bus RAMP GENERATOR TOUCH SENSOR Bass Knob Thermistor MUTE Volume Headphone Aux In USB Input 3 3V VSNUB 1 2V Reg VRAW Thermistor 113 115 116 120 119 RT6307 RT6206 Q6101 135 131 134 U7000 U150 TDA8566 Amplifier U350 TDA8566 Amplifier U250 Left Right Left Surround Right Surround Bass 27 13 15 16 18 16 18 13 15 13 15 16 18 2 3 8 9 2 3 8 9 2 3 8 9 28 25 23 26 24 9 U50 U51 U902 Q9031 Q10 U1...

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