Bose AV28 Manual Download Page 71

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Revision Driven

by Part(s)

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Effected

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ECN 31418

Changes RCA connector block
From 256106-001 to 256106-002

Summary of Contents for AV28

Page 1: ...ty Information 2 Electrostatic Discharge Sensitive ESDS Device Handling 2 Specifications 3 5 Theory of Operation 6 28 Disassembly Assembly 29 30 Setting up a Computer to Issue TAP Commands 31 Issuing TAP Commands to the AV28 media center 32 General Test Procedure Notes 32 Functional Performance Verification Tests 33 34 Adjustment Performance Verification Procedures 35 37 Figure 1 AM Test Setup 35 ...

Page 2: ...NING 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...

Page 3: ... Zone 2 S PDIF and variable analog Record L and R Fixed audio Record digital S PDIF and Optical Optical output S PDIF 15 to 21 dBm Composite video NTSC or PAL 1Vpp with sync 75 Ohm S Video Luminance 1Vpp Chrominance 0 3Vpp IR Controls other manufacturer s IR operated devices universal method FM Tuner Tuning range 87 7 MHz 107 9 MHz De emphasis 75 usec Channel spacing 200 kHz Sensitivity mono usabl...

Page 4: ...nmental Limit 40 40 40 40 40 40 40 Nominal 0 6 0 6 0 6 0 6 0 6 0 6 0 6 Ambient Limit 1 4 1 4 1 4 1 4 1 4 1 4 1 4 Distortion Environmental Limit 2 0 2 0 2 0 2 0 2 0 2 0 2 0 Nominal 3 3 3 3 3 3 3 Frequency Response dB 220 Hz 2 0 kHz Ambient Limit 6 6 6 6 6 6 6 Auto Stop Level dBuV m 70 7 65 7 63 7 60 7 54 7 48 7 48 7 Single disc CD DVD Supported formats DVD video Audio CD CD R CD R W MP3 CD CD perfo...

Page 5: ...r Mini stereo jack Output level 31 mW at THD 0 15 into a 32 Ohm load Electrical S PDIF Input Sampling rates accommodated 32 kHz 44 1 kHz 48 kHz Bits recognized and accepted 16 20 24 Input impedance 75 Ohms Input coupling AC coupled Optical S PDIF Input Sampling rates accommodated 32 kHz 44 1 kHz 48 kHz Bits recognized and accepted 16 20 24 Connector TOSLINK Electrical Optical S PDIF Output Samplin...

Page 6: ... of the media center also exist An integrated IR Blaster allows limited control of other manufacturer s equipment TV s VCR s and Cable Satellite Set Top boxes The AV28 media center has two independent audio output zones accessible through circular DIN connectors in the back of the product The AV28 media center contains five PCBs There are some components shown on schematics whose reference designa...

Page 7: ... to eliminate power supply startup surges and is fed to the 12V supply and the flat flex cable which feeds it to the 5 1V and 3 3V supplies on the Main PCB Power Supply Block Diagram 2 2 Switching Power Supplies See SD254135 sheet 9 and SD256131 sheet 3 for the power supply circuits The switching power supplies are ST L4973D3 3 regulator ICs U802 and U803 on the Main PCB and U301 on the Tuner PCB ...

Page 8: ...kHz or 101 7081 kHz depending on the state of SUPPLY_FREQ_SEL driven by U1 U1 picks the state based on AM tuner frequency 2 4 Power Fail Detection Q802 and Q803 detect a power failure by asserting the active low POWER_FAIL signal when the console input voltage V_RAW falls below a given threshold equivalent to an AC line voltage of about 75 VACRMS This signal is fed to U1 as an interrupt so the mic...

Page 9: ...ory interface which supports SDRAM and FLASH ROM an ATAPI interface a DMA controller an MPEG video decoder on board data and instruction caches a digital video interface digital audio processing a general purpose interface and numerous general purpose I O One RISC processor in U1 RISC0 manages the ATAPI interface to the DVD ROM drive and handles all low level details associated with playback navig...

Page 10: ... 1 of SD254135 The U1 memory interface supports both SDRAM and flash memory of various sizes Both memory ICs are connected to the same bus and a chip select chooses between the two devices The type of memory cycle that is run depends on which address space is needed 3 2 1 FLASH U2 is a 1 megaword by 16 bit Flash memory IC FLASH memory is nonvolatile meaning that its stored data is not lost when th...

Page 11: ... cord attached to J104 a 10mH inductor in the power pack facilitates transmission and reception over the zip cord The RF signal is capacitively coupled to the V_RAW line by C214 3 3 1 1 Receiver The remote control receiver module is an AM receiver it takes the RF signal from the antenna line demodulates it and outputs the received data to the data slicer circuit U104 an LM393 dual comparator acts ...

Page 12: ... be set for Room G 110 3 3 2 Infrared Transceiver The AV28 media center contains a built in IR Blaster capable of sending control commands out the black lens along the bottom front of the product to other manufacturers A V equipment Similarly an IR receiver is built in which allows the media center to be controlled by any IR remote control capable of sending Bose AV28 control commands 3 3 2 1 Infr...

Page 13: ...o be enabled via the System Setup menus in the OSD first however The Main PCB supplies 5 1V to the module The module performs light filtering functions optical to electrical conversion demodulation about a 38 kHz carrier and level shifting to provide TTL level outputs to U1 The plastic housing surrounding this area is translucent to infrared Infrared control must be enabled in the OSD to be functi...

Page 14: ...Digit 8 Digit 8 Digit 8 10 Digit 9 Digit 9 Digit 9 Digit 9 Digit 9 11 Digit 0 Digit 0 Digit 0 Digit 0 Digit 0 12 Enter Channel Enter Channel Enter Channel Enter Channel Enter 13 10 10 10 10 10 14 Previous Channel Previous Channel Previous Channel Previous Channel Previous Channel 15 20 20 20 20 20 16 Channel Up Program Up Channel Up Channel Up Channel Up Channel Up 17 Channel Down Program Down Cha...

Page 15: ...dio source material as their analog counterparts in each Zone but the left right information has been digitized and combined into a single datastream The S PDIF outputs how ever may send either 2 channel PCM audio or bursts of compressed multichannel audio in AC 3 AAC MPEG 2 MP 3 or DTS formats The amplitude information within the S PDIF streams never varies with volume level instead speakers rece...

Page 16: ...57 Quad 2 Input Digital MUX chips are used to route I2 S signals consisting of a Data line Master Clock L R Frame Clock and Bit Clock between the codecs and the S PDIF transmitter chips These digital MUX chips are controlled by U1 using a set of individual logic lines where a 3 3V level selects the B inputs and a 0V level selects the A inputs These logic lines have various schematic names and are ...

Page 17: ...6 kSPS CS8405 S PDIF XMTR U406 74HC157 MUX U404 ZONE 2 S PDIF DIGITAL OUTPUT J701 OPTICAL S PDIF DRIVER S PDIF RECORD OUTPUT OPTICAL S PDIF RECORD OUTPUT VCR EXT AUX EXT TAPE EXT TUNER DVD MIXDOWN TV EXT U201 TEA6422 ANALOG MUX 1 2 3 4 5 6 1 2 3 ANALOG L R SOURCES CS4340 DAC D A U503 D A CS4340 DAC U202 U306 CS8405 S PDIF XMTR U302 74HC157 MUX U303 ZONE 2 ANALOG L R VARIABLE OUTPUT ZONE 1 ANALOG L...

Page 18: ...result shown on top in bold Zone2 result shown on bottom in italic Source Selected for Zone 1 Off AM FM Tape AUX VCR TV DVD MP3CD CD Off Off Off Analog Off Analog Off Digital Off Digital Off Digital Off Digital Off Digital Off Digital Off Digital Off AM Off Analog Analog Analog Digital Analog Digital Analog Digital Analog Digital Analog Digital Analog Digital Analog Digital Analog FM Off Analog An...

Page 19: ...g Zone 1 S PDIF Network Output Used for Cobalt II Zone 1 Variable Analog Output Used for Cobalt I Analog Record Output S PDIF Record Output Headpho ne Output Zone 2 S PDIF Network Output Used for Cobalt II Zone 2 Variable Analog Output Used for Cobalt I Internal CD DA O K O K De Emphasis is Missing O K O K O K O K External S PDIF Sources O K O K De Emphasis is Missing O K O K O K O K CS4224 Hardwa...

Page 20: ...ndard uses an 8 bit bus with interleaved Y Cr Cb data Synchronization information is embedded in the data stream and exclusively uses values of 00 and FF hex Y values are from 1 to 254 with 1 being black C values are from 1 to 254 with 128 being no chroma The standard document should be consulted for further details on this bus The video encoder essentially a video digital to analog converter U601...

Page 21: ...stort the negative tips of these chrominance signals For these signals the transistors Q601 and Q602 are turned on by the port pins of U601 supplying enough DC voltage to the signal to raise them above the clamp level preventing any clamping action on them The CS4955 must receive a 27 MHz signal from the clock oscillator with an accuracy of 1350 hertz This frequency is phase lock looped inside the...

Page 22: ...st signal levels are injected into the UUT and the resultant ADC values for stop and force mono levels are stored in the Flash memory of the main board Level scaling is applied to both the AM and FM S meter signals so that these signals do not saturate the dynamic range of the 3 3 V full scale A D converter 6 2 AM Tuner The signal from the external AM loop antenna enters through the 2 5 mm AM jack...

Page 23: ... from the PLL to the main board controller 6 4 RDS Operation This feature is only implemented in the European version of the AV28 media center The LC72722 Radio Data System RDS decoder IC U102 is a single chip system IC that imple ments the signal processing required by both the European RDS standard and US RDBS system RDS RDBS systems can send digital information over the airwaves along with the ...

Page 24: ...s connect U1 to the keypad three signals represent the keypad rows and three signals represent the keypad col umns U1 identifies button presses by sequentially driving the KEYOUT lines which activate individual rows of keys and reading back the KEYIN lines which have 75K pullup resistors inside U1 If a button is pressed the KEYIN line connected to that column of keys will be high 3 3V See SD256140...

Page 25: ...er detection circuit is built around U303 an NJM3403 quad op amp IC C328 and L302 form a highly peaked low pass filter about 15750 Hz C324 C325 and L303 form a similar filter about 31500 Hz The filters boost the voltage of their passbands about 10 times The outputs of these filters are fed to active band pass filters constructed of sections of U303 the active filters have a Q of 5 allowing for com...

Page 26: ...ss power on self test the green LED and amber LED will alternately blink at approx a 5 Hz rate If the green LED is blinking at its normal 1 Hz rate a blinking 1Hz amber light indicates that there is no valid S PDIF signal present If the amber LED is off while the green LED is blinking normally then valid S PDIF is present and being received Finally the amber LED will briefly blink in this case onl...

Page 27: ...et for legacy mode as follows The table shows that up to three AM25P 30P II digital bass module s and three LSA s labelled 1 2 and 3 here can be addressed by a AV28 media center remote control Note that a special adapter box would be required to actually hang more than one AM25P 30P II digital bass module and one LSA off each zone of the AV28 media center To control a single AM25P 30P II digital b...

Page 28: ...ss and hold the STORE key and press the ENTER key one time The soft ware version is displayed on the VFD in the following format SV C dateCode version build for example SV C 092501 1 0 0125 would indicate Version 1 0 code made from build 125 on September 25 2001 10 4 User Settings Stored in FLASH Certain user settings tuner presets OSD settings like preference for Film EQ in a particular source an...

Page 29: ...ctor key is on the top when inserting the connec tor Line up the connector to the pins on the receptacle and gently push in Do not force the connector or push on the connector at an angle Damage to the pins may occur 4 3 With the DVD CD assembly 1 label side up align the tabs on the DVD CD bracket 15 with the four tabs located in the base 9 Press downward on the corners of the DVD CD assembly unti...

Page 30: ... 1 9 2 Release the VFD module 6 from the two locking tabs which are located at the two top corners of the VFD module Pull up the VFD module 9 3 Disconnect the cable from J103 located on the main PCB 2 10 VFD Module Replacement 10 1 Connect the cable to J103 located on the main PCB 2 10 2 Slide the VFD module 6 into the VFD holder on the base until the two locking tabs snap into place 11 IR PCB Rem...

Page 31: ...ect ing the AV28 media center to and then click OK 4 In the COM1 Properties window make the selections in the various fields as shown 5 In the Hyperterminal window click on File Properties In the Properties window click on the Settings tab make the selections in the various fields as shown Setting up a Computer to Issue TAP Commands 6 In the Settings window click on ACSII setup and make the selec ...

Page 32: ...n your computer Connect the test cable s 3 5mm plug to the serial data jack on the AV28 media center 1 2 With a Hyperterminal window open apply power to the AV28 media center A response similar to the following will be displayed on your computer screen Reset Fixture Detection Failed Phase 1 Input Pattern 11010111101 Zone Sense Bus Failed Memory Tests Passed Ready for test Self test phase has expir...

Page 33: ... emf field intensity and verify the radio does not stop at 1130 kHz 1125 kHz for Euro and Japan 3 FM Sensitivity Performance Verification 3 1 Set the RF generator to 98 1 MHz 1 kHz mono modulation pilot off 75 kHz deviation 17 dBf at the unit s FM antenna input J102 19 dBf for Euro and Japan 3 2 Measure the distortion at the left or right record output It should be 3 0 4 FM Seek Performance Verifi...

Page 34: ...rt a DVD a clean undistorted picture from the TV A clean undistorted audio output from the PS28 35 powered speaker TV analog audio input TV VCR analog audio input VCR AUX analog audio input AUX 2 Analog audio Inputs Tape analog audio input an analog source Tape a clean undistorted audio output from the PS28 35 powered speaker connected to the console s Speaker Zones output TV digital S PDIF audio ...

Page 35: ...erator output for a 69 dBuV m field intensity at the unit s an tenna 30 AM modulation 1 kHz and the unit and RF generator to 1500 kHz 2 2 Adjust the red slug of T101 until a maxi mum output is measured at the record output 2 3 Set the RF generator and unit to 600 kHz 2 4 Adjust the black slug of T101 until a maximum output is measured at the record output 2 5 The adjustment of the red and black sl...

Page 36: ... at a level be tween 520 1050 mVrms 5 4 If the distortion is 5 adjust T103 for minimum distortion Verify the signal level is between 520 1050 mVrms and the distortion is 5 6 FM Sensitivity Verification 6 1 Set the RF generator to 98 1 MHz 1 kHz mono modulation pilot off 75 kHz deviation 17 dBf at the unit s FM antenna input J102 19 dBf for Euro 6 2 Measure the THD N at the left or right record out...

Page 37: ...ecord output 9 6 Issue the TAP command TB This will save the adjustment into FLASH Adjustment Performance Verification Procedures Input Frequency Input Amplitude Detector Output 60 Hz 200 mVrms 8Vrms 15 75 kHz 30 mVrms 2 5 Vrms 31 5 kHz 30 mVrms 2 5Vrms 10 TV ON Detector Verification 10 1 Apply a signal to the TV Sensor input J105 pin 2 at the level and frequency listed in the following table Note...

Page 38: ... the same safety characteristics as the recommended replacement part might create shock fire and or other hazards 4 When replacing the tuner or main PCB the tuner alignments should be performed The average tuner alignment values are stored in FLASH memory which is located on the main PCB when the main PCB is manufactured The alignment procedures should be done to optimize the performance of the tu...

Page 39: ...40300 1 19 CABLE FFC 26 POS 130mm 256147 30130 1 20 FOOT RUBBER 188462 001 6 21 BRACKET SUPPORT TUNER PCB 256748 001 1 22 SCREW M3 0 5 SYM PAN XREC 256752 005 4 23 CLIP SPACER DAMPER 260386 1 24 PLATE STRIKER 256756 001 1 25 SPRING DOOR 256757 001 1 26 MAGNET DOOR 258357 1 27 GEAR DAMPER UP RIGHT TYPE F 256797 04 1 28 SCREW TAP 8 11X 625 PAN XRC SQ 193637 10 6 29 GASKET EMI 272391 085 1 30 GASKET ...

Page 40: ......

Page 41: ... 5 199403 103 R112 10K 0603 1W 5 199403 103 R113 10K 0603 1W 5 199403 103 R114 10K 0603 1W 5 199403 103 R115 10K 0603 1W 5 199403 103 R116 10K 0603 1W 5 199403 103 R117 10K 0603 1W 5 199403 103 R118 10K 0603 1W 5 199403 103 R119 10K 0603 1W 5 199403 103 R121 5 6K 0603 1W 5 199403 562 R122 5 6K 0603 1W 5 199403 562 R123 10K 0603 1W 5 199403 103 R124 10K 0603 1W 5 199403 103 R125 5 6K 0603 1W 5 1994...

Page 42: ... 1W 5 199403 472 R231 4 7K 0603 1W 5 199403 472 R233 4 7K 0603 1W 5 199403 472 R234 4 7K 0603 1W 5 199403 472 R235 820 OHM 0603 1W 5 199403 821 R236 820 OHM 0603 1W 5 199403 821 R237 100K 0603 1W 5 199403 104 R238 100K 0603 1W 5 199403 104 R239 1 0K 0603 1W 1 191465 1001 R240 1 0K 0603 1W 1 191465 1001 R241 1 0K 0603 1W 1 191465 1001 R242 10K 0603 1W 5 199403 103 R243 1 0K 0603 1W 1 191465 1001 R2...

Page 43: ... 191465 3241 R328 3 24K 0603 1W 1 191465 3241 R329 3 24K 0603 1W 1 191465 3241 R330 3 24K 0603 1W 1 191465 3241 R331 14 OHM 0603 1W 1 191465 1402 R332 14 OHM 0603 1W 1 191465 1402 R333 432 OHM 0603 100MW 1 191465 4320 R334 432 OHM 0603 100MW 1 191465 4320 R335 100K 0603 1W 5 199403 104 R336 100K 0603 1W 5 199403 104 R337 49 9 OHM 0603 1W 1 191465 49R9 R338 10K 0603 1W 5 199403 103 R339 10K 0603 1W...

Page 44: ...03 1W 1 191465 1402 R429 1 0K 0603 1W 1 191465 1001 R430 1 0K 0603 1W 1 191465 1001 R431 100K 0603 1W 5 199403 104 R432 100K 0603 1W 5 199403 104 R433 49 9 OHM 0603 1W 1 191465 49R9 R434 10K 0603 1W 5 199403 103 R435 10K 0603 1W 5 199403 103 R436 JUMPER CHIP 0603 196042 R437 JUMPER CHIP 0603 196042 R438 330 OHM 0603 1W 5 199403 331 R439 1 0K 0603 1W 1 191465 1001 R440 100 OHM 0603 1W 5 199403 101 ...

Page 45: ...5 199403 472 R624 4 7K 0603 1W 5 199403 472 R627 10K 0603 1W 1 191465 1002 R629 10K 0603 1W 1 191465 1002 R630 10K 0603 1W 1 191465 1002 R631 4 99K 0603 1W 1 191465 4991 R632 10K 0603 1W 1 191465 1002 R633 10K 0603 1W 1 191465 1002 R634 10K 0603 1W 1 191465 1002 R635 4 99K 0603 1W 1 191465 4991 R701 100 OHM 0603 1W 5 199403 101 R702 100 OHM 0603 1W 5 199403 101 R703 100 OHM 0603 1W 5 199403 101 R7...

Page 46: ...472 R753 100 OHM 0603 1W 5 199403 101 R754 100 OHM 0603 1W 5 199403 101 R802 33 2K 0603 1W 1 191465 3322 R803 33 2K 0603 1W 1 191465 3322 R805 6 04K 0603 1W 1 191465 6041 R806 9 09 OHM 0603 1W 1 191465 9091 R810 10K 0603 1W 1 191465 1002 R811 18 2K 0603 1W 1 191465 1822 R815 100 OHM 0603 1W 5 199403 101 R819 100 OHM 0603 1W 5 199403 101 R820 100 OHM 0603 1W 5 199403 101 R821 100 OHM 0603 1W 5 1994...

Page 47: ...00C C107 047uF 0603 X7R 25V 5 196999 473 C108 047uF 0603 X7R 25V 5 196999 473 C109 047uF 0603 X7R 25V 5 196999 473 C110 047uF 0603 X7R 25V 5 196999 473 C112 100pF 0603 COG 50V 5 188454 101 C113 047uF 0603 X7R 25V 5 196999 473 C114 330pF 0603 COG 50V 5 188454 331 C115 330pF 0603 COG 50V 5 188454 331 C116 330pF 0603 COG 50V 5 188454 331 C117 330pF 0603 COG 50V 5 188454 331 C118 330pF 0603 COG 50V 5 ...

Page 48: ...00pF 0603 COG 50V 5 188454 101 C248 1000pF 0603 X7R 50V 191470 102 C249 1000pF 0603 X7R 50V 191470 102 C250 1000pF 0603 X7R 50V 191470 102 C251 10uF EL 85 25V 20 177902 100E C252 047uF 0603 X7R 25V 5 196999 473 C253 1000pF 0603 X7R 50V 191470 102 C254 1000pF 0603 X7R 50V 191470 102 C302 10uF EL 85 16V 20 177902 100C C303 10uF EL 85 16V 20 177902 100C C305 047uF 0603 X7R 25V 5 196999 473 C306 4 7uF...

Page 49: ...16 1 0uF 1206 X7R 16V 181998 105 C417 047uF 0603 X7R 25V 5 196999 473 C418 047uF 0603 X7R 25V 5 196999 473 C419 1 0uF 1206 X7R 16V 181998 105 C420 1000pF 0603 X7R 50V 191470 102 C421 1000pF 0603 X7R 50V 191470 102 C422 1000pF 0603 X7R 50V 191470 102 C423 1000pF 0603 X7R 50V 191470 102 C424 047uF 0603 X7R 25V 5 196999 473 C425 220pF 0603 COG 50V 5 188454 221 C426 220pF 0603 COG 50V 5 188454 221 C42...

Page 50: ...3 X7R 25V 5 196999 473 C603 047uF 0603 X7R 25V 5 196999 473 C604 180pF 0603 COG 50V 188454 181 C605 180pF 0603 COG 50V 188454 181 C606 180pF 0603 COG 50V 188454 181 C607 22pF 0603 COG 50V 5 188454 220 C608 22pF 0603 COG 50V 5 188454 220 C609 22pF 0603 COG 50V 5 188454 220 C610 220pF 0603 COG 50V 5 188454 221 C611 220pF 0603 COG 50V 5 188454 221 C612 220pF 0603 COG 50V 5 188454 221 C613 10uF EL 85 ...

Page 51: ...603 X7R 25V 5 196999 472 C714 4 7nF 0603 X7R 25V 5 196999 472 C716 4 7nF 0603 X7R 25V 5 196999 472 C717 4 7nF 0603 X7R 25V 5 196999 472 C718 4 7nF 0603 X7R 25V 5 196999 472 C719 4 7nF 0603 X7R 25V 5 196999 472 C720 4 7nF 0603 X7R 25V 5 196999 472 C721 4 7nF 0603 X7R 25V 5 196999 472 C722 4 7nF 0603 X7R 25V 5 196999 472 C723 4 7nF 0603 X7R 25V 5 196999 472 C724 4 7nF 0603 X7R 25V 5 196999 472 C725 ...

Page 52: ...50V 10 133623 473 C841 047uF 0805 X7R 50V 10 133623 473 C842 047uF 0805 X7R 50V 10 133623 473 C843 047uF 0805 X7R 50V 10 133623 473 C844 047uF 0603 X7R 25V 5 196999 473 C845 047uF 0603 X7R 25V 5 196999 473 C846 047uF 0805 X7R 50V 10 133623 473 C847 047uF 0805 X7R 50V 10 133623 473 C848 680pF 0603 X7R 50V 191470 681 C849 3 9nF 0603 X7R 25V 5 196999 392 C1001 22uF EL 85 20 16V 177902 220C Reference ...

Page 53: ...D 123 196984 002 D707 DUAL SOT 23 BAW56 180738 D801 SB560 254110 005 D803 SCHOTTKY 40V 3A SMB 193847 001 D1000 BAV99 SOT23 147239 D1002 56107 IR EMITTING 256733 002 D1003 56107 IR EMITTING 256733 002 D1004 56107 IR EMITTING 256733 002 D1005 56107 IR EMITTING 256733 002 Diodes continued Reference Designator Description Part Number Note Q101 SOT 23 260354 001 Q103 2SA1521 P SOT 2 2K 180789 Q105 2SA1...

Page 54: ... 260377 001 U303 CODEC AUDIO CS4224 SSOP28 254153 001 U304 QUAD 2 CHANNEL MUX 74LCX157 260377 001 U305 OPAMP DUAL SINGLE SUPPLY 256740 001 U306 XMITTER DIG CS8405A SOIC 254163 001 U402 QUAD 2 CHANNEL MUX 74LCX157 260377 001 U403 CODEC AUDIO CS4224 SSOP28 254153 001 U404 QUAD 2 CHANNEL MUX 74LCX157 260377 001 U405 OPAMP DUAL SINGLE SUPPLY 256740 001 U406 XMITTER DIG CS8405A SOIC 254163 001 U501 REC...

Page 55: ...3 CONN HEADER 4 POS 148591 04 J301 CONN DUAL DIN 8 POS 178355 J501 CONNECTOR OPTICAL JF J2001 258421 001 J601 CONN DIN DUAL 4 POS W FLANGE 256107 002 J701 CONNECTOR OPTICAL JF J1000 258420 001 J704 CONNECTOR JACK DUAL STEREO 268897 001 J2000 CONN JACK HEAD PHONE PCB MNT 9P 148583 J2001 CONNECTOR HEADER RTANG EH 256114 04 L100 22uH COMMON MODE 187598 220 L2000 100uH SMT LEM4532 178370 101 L2001 100...

Page 56: ...1465 1302 R123 17 8K 0603 1W 1 191465 1782 R124 3 32K 0603 1W 1 191465 3321 R125 3 32K 0603 1W 1 191465 3321 R126 2 21K 0603 1W 1 191465 2211 R127 2 21K 0603 1W 1 191465 2211 R128 4 75K 0603 1W 1 191465 4751 R129 5 62K 0603 100mW 1 191465 5621 R130 5 62K 0603 100mW 1 191465 5621 R134 10K 0603 1W 5 199403 103 R135 10K 0603 1W 5 199403 103 R136 10K 0603 1W 5 199403 103 R137 51K 0603 SMD 100mW 199403...

Page 57: ...7 3 32K 0603 1W 1 191465 3321 R308 200K 0603 1W 1 191465 2003 R309 100K 0603 1W 5 199403 104 R310 100K 0603 1W 5 199403 104 R311 3 32K 0603 1W 1 191465 3321 R312 2 21K 0603 1W 1 191465 2211 R313 200K 0603 1W 1 191465 2003 R314 100K 0603 1W 5 199403 104 R315 100K 0603 1W 5 199403 104 R316 51K 0603 SMD 100mW 199403 513 R317 10K 0603 1W 5 199403 103 R318 100K 0603 1W 5 199403 104 R319 1K 0603 1W 5 19...

Page 58: ...5 188454 330 C145 047uF 0805 X7R 50V 10 133623 473 C146 01uF 0603 X7R 50V 191470 103 C148 1000pF 0603 X7R 50V 191470 102 C149 100uF EL 85 16V 20 149947 101C C150 2 2uF EL BP 85 50V 20 147522 2R2 C151 047uF 0603 X7R 5 25V 196999 473 C152 047uF 0805 X7R 50V 10 133623 473 C201 68pF 0603 COG 50V 5 188454 680 C203 01uF 0603 X7R 50V 191470 103 C204 68pF 0603 COG 50V 5 188454 680 C205 180pF 0603 COG 50V ...

Page 59: ... 50V 0603 5 260345 102 C322 470pF 0603 COG 50V 5 188454 471 C323 10uF EL 85 16V 20 149947 100C C324 022uF 0603 X7R 25V 196999 223 C325 0 056uF 0603 16V 5 258498 563 C326 150pF 0603 COG 50V 5 188454 151 C327 1800pF 0603 X7R 50V 10 191470 182 C328 1000pF X7R 50V 0603 5 260345 102 Diodes Reference Designator Description Part Number Note D202 SOT MMBD914LT1 148582 D203 BAV99 SOT23 147239 D301 SCHOTTKY...

Page 60: ...434 001 J103 CONN HEADER 30P TOP ENTRY SMT 253356 T30 J104 CONN DC POWER JACK 256763 001 3 J105 CONN SERIAL 178356 L101 1000uH AX ON ALR 40A 260363 102 L201 10uH SMT LEM4532 178370 100 L202 100nH 0603 5 191488 101J L203 1 0uH SMD 20 173273 1R0 L204 220nH 0805 5 191469 221J L205 1 0uH SMD 20 173273 1R0 L301 100uH 131297 L302 330uH SMD 20 178336 331J L303 330uH SMD 20 178336 331J L304 22uH COMMON MO...

Page 61: ...es Refer to the particular system s powered bass module service manual for further packaging items These items will differ depending upon the system powered bass module the AV28 media center is packaged with Item Number Description Part Number Qty Note 1 PACKING TOP EPS 258467 1 2 PACKING BOTTOM EPS 258468 1 Packed with bass module REMOTE CONTROL RC28 256119 001 ...

Page 62: ...the CD laser current 2 Measure and record the voltage at the points 5V and L5V referenced to the ground shown in figure 6 3 Subtract L5V from 5V 5V L5V and record the laser voltage LmV LmV 1 Ohm equals laser current LC 4 The measured laser current value should be 20 of the printed current rating on the pickup head PU PU 20PU LC PU 20PU Refer to figure 6 for the location of the laser current rating...

Page 63: ...63 Integrated Circuit Diagrams U1 CS98000 DVD Decoder Pin Function Table ...

Page 64: ... E Chip Enable G Output Enable W Write Enable RP Reset Block Temporary Unprotect RB Ready Busy Output BYTE Byte Word Organization Select VCC Supply Voltage VSS Ground NC Not Connected Internally U2 FLASH 16M 3 3V TSSOP 90NS U3 SDRAM 64MBIT 2MX32 3 3V U201 AUDIO MATRIX S028 U202 U503 CS4340 KS DAC 96 kHz 3 5V Integrated Circuit Diagrams ...

Page 65: ...P DUAL HI CURRENT Inputs Output ___ ST Select A B Y H X X X L L L L X L L L H X H L H X L L L H X H H X Don t care U302 U304 U402 U404 U502 U505 Truth Table 74LCX157 QUAD 2 CHANNEL MUX U303 U403 CS4224 CODEC AUDIO SS0P28 U306 U406 CS8405A XMITTER DIG SOIC U501 CS8415A RECEIVER SPDIF SOIC ...

Page 66: ...grated Circuit Diagrams U601 CS4955 CQ ENCODER VIDEO DIG U602 VIDEO SW 2 IN 3 CH SSOP16 U603 U604 DUAL VIDEO AMP SSOP 8 A O L H H L U701 Truth Table 74VCHU04 INVERTER 5V U301 U802 U803 VOLT REG 3 3V 3 5A SMPS ...

Page 67: ...67 U704 KS88C01532 IR CODE QFP44 Pin Function Table Integrated Circuit Diagrams ...

Page 68: ...o not control the media center 1 3 Replace the battery cover 1 4 Lift the media center door and press the All Off button 1 5 Press and hold the Store key The current house code will appear in the media center display in the form of four rectangles which represent the positions of switches 1 through 4 HOUSE CODE Current house code 0000 Switches 1 4 down 1 6 While holding the Store key press any key...

Page 69: ...the customer s existing remote can be changed to control the Zone 2 functions but then will have to be changed back to control the Zone 1 functions 1 1 Open the remote control battery cover and locate the miniature switches 1 2 Set switches 5 and 6 as shown in the table below 1 3 Make sure the house code switches match those of the customer s other remote If the house code for the AV28 media cente...

Page 70: ...the DVD region code The sixth press reveals the tuner board type The seventh press reveals the UEI IR blaster code revision string Each subsequent press cycles through these seven messages 3 NTC 7 Video Test Pattern Press Store and Enter until the software revision is shown At this point pressing Erase will toggle the NTC 7 video test pattern on and off You do not need to leave your fingers on the...

Page 71: ...Revision Driven by Part s Effected Page s Effected REV 00 REV 01 ECN 31418 Changes RCA connector block From 256106 001 to 256106 002 55 ...

Page 72: ...Lifestyle Model AV28 Media Center Service Manual Part Number 264563 2008 Bose Corporation ...

Page 73: ...Specifications and Features Subject to Change Without Notice Bose Corporation The Mountain Framingham Massachusetts USA 01701 P N 264563 REV 12 010 08 H http serviceops bose com ...

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