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Bose AV28 Manual

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Safety 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
Figure 2. Tap Test Cable Part Number 264565 .................................................................................. 38
Part List Notes ................................................................................................................................. 38
Main Part List ................................................................................................................................... 39
Figure 3. Exploded View .................................................................................................................... 40
Main PCB 260318-0 Electrical Part List ................................................................................... 41-55
Tuner PCB 260322-1 Electrical Part List ................................................................................. 56-60
Head Unit Packaging Part List ....................................................................................................... 61
Figure 4. Console Packaging ............................................................................................................ 61
Figure 6. Laser Current Measurement Point ...................................................................................... 62
Figure 5. DVD Player Rear Panel ...................................................................................................... 62
Laser Current Measurement .......................................................................................................... 62
Integrated Circuit Diagrams ..................................................................................................... 63-67
Changing House Codes ................................................................................................................. 68
Figure 7. House Code Settings ......................................................................................................... 68
Zone 2 Operation ............................................................................................................................ 69
Figure 8. Zone 2 Remote Control Switch Setting .............................................................................. 69
Console-Key Special Function Features ...................................................................................... 70
The software in the AV28 Media center can be updated using a software update CD available from
®
Bose
service. Refer to procedure 2 on page 70, Console-Key Special Function Features, to
determine the software version of the unit. Contact Bose Service or refer to the Bose service
extranet site for information regarding the latest software revision; click on Lifestyle
and then AV28 media center. http://serviceops.bose.com
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 SERVICE CENTER OR OWNER OF THE
BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED
FOR ANY OTHER PURPOSE.
Contents
Software Update Information
PROPRIETARY INFORMATION
1
®
music centers

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Summary of Contents for Bose AV28

  • Page 1: Table Of Contents

    Figure 8. Zone 2 Remote Control Switch Setting ................69 Console-Key Special Function Features ..................70 Software Update Information The software in the AV28 Media center can be updated using a software update CD available from ® Bose service. Refer to procedure 2 on page 70, Console-Key Special Function Features, to determine the software version of the unit.

  • Page 2: Safety Information

    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. Make leakage current or resistance measurements to determine that exposed parts are accept- ably insulated from the supply circuit before returning the unit to the customer.

  • Page 3: Specifications

    Specifications Physical Description: Dimensions: 15.8" W x 11.0" D x 3.5" H (40.1 x 27.9 x 8.9 cm) Weight: 8.2 lbs. (3.7 kg) Cover: Aluminum Base: Molded plastic Display: Vacuum fluorescent Inputs: TAPE: 2 Vrms, maximum AUX: 2 Vrms, maximum VCR: 2 Vrms, maximum 2 Vrms, maximum...
  • Page 4 Specifications AM Tuner: Channel spacing: 10 kHz Test Parameter Condition 530- 560- 600- 710- 960- 1410- 1620- 1400 1610 1710 Usable Nominal Sensitivity Ambient dBuV/m Limit Environmental Limit Adjacent Nominal Channel Ambient Limit Selectivity , dB Alternate Nominal Channel Ambient Limit Selectivity , dB Image...
  • Page 5 Specifications Analog Inputs: Input level: Full scale output; 2 Vrms maximum, 200 mVrms Input impedance: 33 k Input coupling: AC coupled Analog Outputs: Output level: 2 Vrms Output level from FM: 0.6 Vrms Output level from AM: 0.4 Vrms Source impedance @ 1 kHz: 220 Ohms Load impedance: 10 k, 2 k minimum...

  • Page 6: Theory Of Operation

    Theory of Operation 1.0 Overview The AV28 media center is a self-contained DVD/CD/MP3 disc player with an AM/FM tuner for use ® with Bose powered speaker systems. In addition to the two internal sources (DVD/CD and AM/ FM tuner), it allows playing up to four external audio sources: TV, VCR, AUX, and TAPE. A 27MHz, one-way RF remote control operates the unit without line-of-sight restriction;...
  • Page 7 Theory of Operation 2.0 Power Supply Electronics 2.1 Architecture Voltage Type PCB Location Input Outputs (schematic page) Linear Power Pack 120VAC +12V, +5.1V, +3.3V Switching Tuner (3) V_RAW DVD drive, VFD, +10V Linear Tuner (3) Tuner, Transceiver, Audio path, +8V Linear Main (9) Video circuits...
  • Page 8 Theory of Operation IC Pin Components Connected Pin Function R301, C302, C303 Sets switching frequency (when not controlled externally) C308 Drives internal D-MOS R322 Inhibits supply R302, C305, C307 Lead-lag filter for compensation loop R304, R305 Voltage feedback for control C304 +5.1V for external reference C306...
  • Page 9 ATAPI bus and stores the decoded video into SDRAM for later readout to the video interface. It also oversees the onboard DSP core, as required, when decoding digital audio data, and sends it out the digital audio interfaces. The second RISC processor (RISC1) runs Bose ® software that handles system control, as-...
  • Page 10 Theory of Operation 3.1.1 Processor Clock U1 is clocked by a crystal inverter-oscillator whose nominal frequency is 27 MHz. A 10KW resistor (R713) biases one gate of U701, a 74VHCU04 [high-speed, unbuffered] inverter. The crystal in the inverter’s feedback path is designed for a 22pF load, achieved by the series combination of the two 30pF load capacitors C704 and C707 and other stray capacitance in the input gates of U1.
  • Page 11 3.3.1 RF Transceiver See sheet 2 of SD256131. The AV28 media center RF transceiver operates at 27.145 MHz using on-off keying (OOK). The RF transceiver circuits are located on the Tuner PCB. The antenna for the RF transceiver system is the DC power cord attached to J104; a 10mH inductor in the power pack facilitates transmission and reception over the zip cord.
  • Page 12 OSD menu, the AV28 will automatically echo all received RF remote control messages out its IR Blaster in Bose AV28 IR format. An IR learning remote can then be taught to control the AV28 by holding it near the front of the media center as the user presses the desired RF buttons.
  • Page 13 R729 and R730 on the Main PCB limit the IR transmit current (setting the transmit brightness). 3.3.2.3 IR Emitter For situations where the position of the AV28 does not allow its built-in IR Blaster signals to prop- erly control an external product, a supplemental IR Emitter “dongle” can be plugged into the back of the media center and pointed more directly at the equipment in question.
  • Page 14 Theory of Operation 3.3.2.6 IR Key Codes The following table describes the key codes capable of being generated by the built-in UEI Blaster chip: Function Name Code Power / Standby Power, Power, Power, Power, Standby Standby Standby Standby Digit 1 Digit 1 Digit 1 Digit 1...
  • Page 15 There are both analog and digital options for all AV28 audio inputs, as well. A simplified diagram of the audio path would therefore be:...
  • Page 16 Theory of Operation Analog audio sources to be played in Zone 1 or Zone 2 are selected by U201, the TEA6422 analog MUX IC. The chip has separate left/right output pairs for each zone, and is controlled by U1 via the serial I C interface.
  • Page 17 Theory of Operation The AV28 Signal Routing and Clocking Diagram, which follows, shows the fully-detailed audio path, including clocking information. The legend at the bottom identifies which signals are analog, which are digital, and what the relevant clock rates/sources are.
  • Page 18 When an external input source (AUX, TAPE, VCR or TV) is chosen for Zone1, the AV28 automati- cally checks for the presence of a digital input stream and plays it if it exists. If it doesn’t, the AV28 will default to playing the analog inputs.
  • Page 19 Theory of Operation A hardware issue was found with the CS4224 codecs whereby audio passing through its A/D converter emerges with left/right sample pairs mismatched; specifically, with left samples lagging right samples by one sample clock. In other words, left/right sample pairs coming out of the ADC together were not sampled together (right was sampled before left).
  • Page 20 YCrCb) signals. The appropriate DACs are enabled by internal control circuitry, commanded by the main processor, depending on the mode selected by the user. This allows either Composite and S- video, or Component video, to be placed on the output jacks of the AV28 console.
  • Page 21 330uF capacitor (100-220uF on early units), and a 75-ohm resistor. This ensures equipment compatibility even if there are DC differences between the AV28 and the driven equipment. The 75- ohm resistor provides reverse cable termination for best signal integrity. Video sent through a 330uF capacitor would have low frequency drop-off, causing sag in the video signal.
  • Page 22 Theory of Operation The composite audio signal is filtered by C124 and fed back into the LA1837 on pin 22. The value of C124 affects FM stereo separation performance. Stereo MPX decoding is also performed by U101 and the decoded left and right output signals are produced on pins 16 and 17. The pilot PLL VCO is completely internal to the LA1837 detector IC, not requiring an external 456 kHz ceramic resonator as in the older LA1836 and LA1851-based designs.
  • Page 23 FM mono/stereo status, 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.
  • Page 24 Theory of Operation 7.0 Additional Electronics in the Console 7.1 Vacuum Fluorescent Display A VFD module is installed in the front of the console. The module contains a microcontroller with masked font tables, as well as built-in switching power supply/inverter and driver IC’s for control- ling the VFD glass.
  • Page 25 Theory of Operation 7.5 TV Power Detector The infrared power command for televisions toggles the power state of the television; in order to automatically turn a customer’s television on when a video source is selected, the power state of the TV must be known to determine if sending a power toggle command is necessary. The circuit detects the presence of the television’s horizontal sweep frequency;...
  • Page 26 Theory of Operation 8.0 LS28/35 Bass Module Issues The LS28/35 bass module is sold as a system with the AV28 media center and is mentioned for ® ® reference. Refer to the Lifestyle 28 and 35 Digital Acoustimass Powered Speakers service manual part number 264562.
  • Page 27 LSA off each zone of the AV28 media center . *To control a single AM25P/30P II digital bass module, it is recommended that the user set switches 7, 8 & 9 on the user’s AV28 RF remote to 010 (Room C, where 0=down and 1=up). To control a single LSA, it is recommended that a user...
  • Page 28 10.0 Software 10.1 FLASH Update Capability The software in the AV28 media center is stored in FLASH. During boot, the software is decom- pressed from the FLASH to the DRAM, where it is executed. U1 can update the contents of the FLASH, so the software is field upgrade-able.

  • Page 29: Disassembly/Assembly

    Disassembly/Assembly (Refer to Figure 3) 1. Top Cover Removal 4.3 With the DVD/CD assembly (1) label side up, align the tabs on the DVD/CD bracket 1.1 Remove the six screws (28) that secure (15) with the four tabs located in the base (9). the top cover (7) to the base (9).
  • Page 30 Disassembly/Assembly (Refer to Figure 3) 7. Main PCB Removal 10. VFD Module Replacement 7.1 Perform procedure 5. 10.1 Connect the cable to J103, located on the main PCB (2). 7.2 Disconnect the cables from J102, J103, J106, J213, and the DVD/CD mechanism’s 10.2 Slide the VFD module (6) into the VFD ribbon cable.

  • Page 31: Setting-Up A Computer To Issue Tap Commands

    Settings tab, make the selections in the port on your computer that you will be connect- various fields as shown. ing the AV28 media center to and then click OK. 6. In the Settings window, click on ACSII setup and make the selec- tions and changes as shown.

  • Page 32: Issuing Tap Commands To The Av28 Media Center

    Issuing TAP Commands to the AV28 media center 1. TAP Test Cable Connection 2. Verify the media center communicates in TAP mode 1.1 Connect the test cable’s, part number 264565, DB-9 connector to the RS-232 COM 2.1 Type the command PS C and hit “Enter”.

  • Page 33: Functional/Performance Verification Tests

    Functional/Performance Verification Tests AM General Test Setup 3. FM Sensitivity Performance Verification Unless otherwise noted, set an RF generator 3.1 Set the RF generator to 98.1 MHz, 1 kHz to 1500 kHz (1503 kHz for Europe and Japan), mono modulation, pilot off, 75 kHz deviation, 74 dBuV emf, 30% AM modulation, 400 Hz 17 dBf at the unit’s FM antenna input, J102.
  • Page 34 Functional/Performance Verification Tests 7. Inputs/Outputs Verification Test Functional test for Connect the Media To... and select the Listen/look for.. the... Center... console source... Speaker Zones 1, 2 an AM28/35 powered output... speaker... a clean TV S-video output... a TV S-Video input... undistorted picture from the TV.

  • Page 35: Adjustment/Performance Verification Procedures

    Connect the test cable’s 3.5mm 3.2 Set the RF generator to 1080 kHz, 30% plug to the serial data jack on the AV28 media AM modulation, 1 kHz modulation, 56 dBuV/m center. Refer to pages 31 and 32.
  • Page 36 Adjustment/Performance Verification Procedures FM Tuner General Test Setup 6. FM Sensitivity Verification Connect the signal generator to the FM an- 6.1 Set the RF generator to 98.1 MHz, 1 kHz tenna jack J102 using a 50 to 75 Ohm match- mono modulation, pilot off, 75 kHz deviation, ing network.
  • Page 37 Adjustment/Performance Verification Procedures 9. FM Stereo Threshold Adjustment, TAP 10. TV ON Detector Verification 9.1 Issue the TAP command TF. 10.1 Apply a signal to the TV Sensor input J105 pin 2 at the level and frequency listed in 9.2 Set the RF generator to 98.1 MHz, 1 kHz the following table.

  • Page 38: Part List Notes

    REAR VIEW Figure 2. Tap Test Cable Part Number 264565 Part List Notes 1. This part is not normally available from customer service. Approval from the Field Service Manager is required before ordering. 2. The individual parts located on the PCB are listed in the part list. This part is critical for safety purposes.

  • Page 39: Main Part List

    Main Part List Refer to Figure 3 Item Description Part Number Note Number DVD-ROM, DV-505SFV7 V1.014R7622 301728-005 or 301728-006 3 MAIN PCB ASSEMBLY, SLAB 276328 1, 2, 4 TUNER , US, PCB ASSEMBLY 260322-1 1, 2, 4 KEYPAD, PCB ASSEMBLY 254141 1, 2 PAD, HEAT TRANSFER, 14.6mm, NOTCH...

  • Page 41: Main Pcb 260318-0 Electrical Part List

    Main PCB 260318-0 Electrical Part List (Resistors) Reference Description Part Number Note Designator 10K, 0603, .1W, 5% 199403-103 33 OHM, 0603, .1W, 5% 199403-330 33 OHM, 0603, .1W, 5% 199403-330 33 OHM, 0603, .1W, 5% 199403-330 33 OHM, 0603, .1W, 5% 199403-330 33 OHM, 0603, .1W, 5% 199403-330...
  • Page 42 Main PCB 260318-0 Electrical Part List (Resistors continued) Reference Description Part Number Note Designator R201 100K, 0603, .1W, 5% 199403-104 R202 100K, 0603, .1W, 5% 199403-104 R203 100K, 0603, .1W, 5% 199403-104 R204 100K, 0603, .1W, 5% 199403-104 R205 100K, 0603, .1W, 5% 199403-104 R206 100K, 0603, .1W, 5%...
  • Page 43 Main PCB 260318-0 Electrical Part List (Resistors continued) Reference Description Part Number Note Designator R304 10K, 0603, .1W, 1% 191465-1002 R305 10K, 0603, .1W, 1% 191465-1002 R306 100 OHM, 0603, .1W, 5% 199403-101 R307 100 OHM, 0603, .1W, 5% 199403-101 R308 22 OHM, 0603, .1W, 5% 199403-220...
  • Page 44 Main PCB 260318-0 Electrical Part List (Resistors continued) Reference Description Part Number Note Designator R405 100 OHM, 0603, .1W, 5% 199403-101 R406 100 OHM, 0603, .1W, 5% 199403-101 R407 100 OHM, 0603, .1W, 5% 199403-101 R410 100 OHM, 0603, .1W, 5% 199403-101 R411 100 OHM, 0603, .1W, 5%...
  • Page 45 Main PCB 260318-0 Electrical Part List (Resistors continued) Reference Description Part Number Note Designator R523 10K, 0603, .1W, 1% 191465-1002 R532 16.2K, 0603, .1W, 1% 191465-1622 R533 16.2K, 0603, .1W, 1% 191465-1622 R534 100 OHM, 0603, .1W, 5% 199403-101 R601 100 OHM, 0603, .1W, 5% 199403-101 R603...
  • Page 46 Main PCB 260318-0 Electrical Part List (Resistors continued) Reference Description Part Number Note Designator R734 10K, 0603, .1W, 5% 199403-103 R735 1.0K, 0603, .1W, 1% 191465-1001 R736 10K, 0603, .1W, 5% 199403-103 R737 1.0K, 0603, .1W, 1% 191465-1001 R738 1M, 0603, .1W, 5% 199403-105 R739 33 OHM, 0603, .1W, 5%...
  • Page 47 Main PCB 260318-0 Electrical Part List (Capacitors) Reference Description Part Number Note Designator .047uF, 0603, X7R, 25V, 5% 196999-473 .047uF, 0603, X7R, 25V, 5% 196999-473 .047uF, 0603, X7R, 25V, 5% 196999-473 .047uF, 0603, X7R, 25V, 5% 196999-473 2.2uF, 1206, X7R, 10V, 20% 260361-2253 .047uF, 0603, X7R, 25V, 5% 196999-473...
  • Page 48 Main PCB 260318-0 Electrical Part List (Capacitors continued) Reference Description Part Number Note Designator C219 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V C220 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V C221 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V C222 .047uF, 0603, X7R, 25V, 5% 196999-473 C223 .01uF, 0603, X7R, 50V...
  • Page 49 Main PCB 260318-0 Electrical Part List (Capacitors continued) Reference Description Part Number Note Designator C330 220pF, 0603, COG, 50V, 5% 188454-221 C331 22uF, EL, 85, 20%, 16V 177902-220C C332 22uF, EL, 85, 20%, 16V 177902-220C C333 .047uF, 0603, X7R, 25V, 5% 196999-473 C334 2200pF, 0603, X7R, 50V...
  • Page 50 Main PCB 260318-0 Electrical Part List (Capacitors continued) Reference Description Part Number Note Designator C507 .01uF, 0603, X7R, 50V 191470-103 C508 .01uF, 0603, X7R, 50V 191470-103 C509 .01uF, 0603, X7R, 50V 191470-103 C513 .047uF, 0603, X7R, 25V, 5% 196999-473 C515 1uF, EL, 85, 50V, 20% 177902-010H C516...
  • Page 51 Main PCB 260318-0 Electrical Part List (Capacitors continued) Reference Description Part Number Note Designator C641 1uF, TANT, 35V, 1411, 20% 188588-105 C642 1uF, TANT, 35V, 1411, 20% 188588-105 C643 1uF, TANT, 35V, 1411, 20% 188588-105 C644 100pF, 0603, COG, 50V, 5% 188454-101 C645 100pF, 0603, COG, 50V, 5%...
  • Page 52 Main PCB 260318-0 Electrical Part List (Capacitors continued) Reference Description Part Number Note Designator C809 2200pF, 0603, X7R, 50V 191470-222 C812 .047uF, 0603, X7R, 25V, 5% 196999-473 C813 .1uF, 0805, X7R, 10%, 25V 181264-104 C814 .047uF, 0603, X7R, 25V, 5% 196999-473 C815 .1uF, 0805, X7R, 10%, 25V...
  • Page 53 Main PCB 260318-0 Electrical Part List (Diodes continued) Reference Description Part Number Note Designator D304 1N5232, ZENER, 5.6V, 225 mW 135247-5232 D305 BAV99, SOT23 147239 D306 1N5232, ZENER, 5.6V, 225 mW 135247-5232 D401 BAV99, SOT23 147239 D402 BAV99, SOT23 147239 D403 BAV99, SOT23 147239...
  • Page 54 Main PCB 260318-0 Electrical Part List (Transistors continued) Reference Description Part Number Note Designator Q303 NPN, SOT, 2SC4695 148770 Q304 NPN, SOT, 2SC4695 148770 Q601 NPN, SOT, 47K 146817 Q602 NPN, SOT, MMBT3904 146819 Q603 NPN, SOT, MMBT3904 146819 Q703 NPN, SOT, 47K 146817 Q705...
  • Page 55 Main PCB 260318-0 Electrical Part List (Miscellaneous) Reference Description Part Number Note Designator CR701 RESNTR, CER, W/INTGRTD CAPS, 8 191446-8R00 FB301 400 OHM, CHIP, 0805 188587-401 FB401 400 OHM, CHIP, 0805 188587-401 FB701 BEAD, FERRITE, CHIP, 1806 256116-181 FB702 BEAD, FERRITE, CHIP, 1806 256116-181 J1000 CONNECTOR, HEADER, RTANG, EH...

  • Page 56: Tuner Pcb 260322-1 Electrical Part List

    Tuner PCB 260322-1 Electrical Part List (Resistors) Reference Description Part Number Note Designator R101 1K, 0603, .1W, 5% 199403-102 R102 120 OHM, 0603, .1W, 5% 199403-121 R103 150 OHM, 0603, .1W, 5% 199403-151 R104 100K, 0603, .1W, 5% 199403-104 R105 47K, 0603, .1W, 5% 199403-473 R106...
  • Page 57 Tuner PCB 260322-1 Electrical Part List (Resistors continued) Reference Description Part Number Note Designator R204 430 OHM, 0603, SMD, 100mW 199403-431 R205 1K, 0603, .1W, 5% 199403-102 R206 68.1K, 0603, .1W, 1% 191465-6812 R207 6.81K, 0603, 0.1W, 1% 191465-6811 R208 9.1K, 0603, .1W, 5% 199403-912 R209...
  • Page 58 Tuner PCB 260322-1 Electrical Part List (Capacitors continued) Reference Description Part Number Note Designator C116 .27uF, 1206, X7R, 16V, 10% 181998-274 C117 47uF, EL, 85, 25V, 20% 149947-470E C118 1.0uF, EL, 85, 50V, 20% 149947-1R0H C119 180pF, 0805, COG, 50V, 5% 133622-181 C120 1.0uF, EL, 85, 50V, 20%...
  • Page 59 Tuner PCB 260322-1 Electrical Part List (Capacitors continued) Reference Description Part Number Note Designator C303 2200pF, 0603, X7R, 50V 191470-222 C304 .047uF, 0805, X7R, 50V, 10% 133623-473 C305 0.10uF, 0603, 16V, 5% 258498-104 C306 0.47uF, 1812, X7R, 50V, 20% 258418-4743 C307 470pF, 0603, X7R, 50V 191470-471...
  • Page 60 Tuner PCB 260322-1 Electrical Part List (Integrated Circuits) Reference Description Part Number Note Designator U101 AM/FM TUNER, MFP-30S 254561-001 U103 PLL FREQSYNTH, LC72144M 260347-001 U104 DUALCOMPARITOR, SO-8, LM393 148584 U301 VOLT REG, 3.3V, 3.5A, SMPS 193846-001 U302 VOLT, REG, 10V, POS 178352-10 U303 OPAMP, QUAD, NJM3403AM...

  • Page 61: Head Unit Packaging Part List

    Note: The AV28 media center is packaged with a powered bass module along with the system accessories. 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.

  • Page 62: Laser Current Measurement

    Laser Current Measurement Mode Select Analog Audio ATAPI Interface Power Supply Digital Audio Headers Connector Connector Connector (4P) Connector CSEL DIGITAL SLAVE +12V MASTER Figure 5. DVD Player Rear Panel Figure 6. Laser Current Measurement Point Laser Current Measurement 1. Turn on the media center and insert a disc.

  • Page 63: Integrated Circuit Diagrams

    Integrated Circuit Diagrams U1, CS98000, DVD Decoder: Pin Function Table...
  • Page 64 Integrated Circuit Diagrams Signal Names A0-A19 Adress Inputs DQ0-DQ7 Data Inputs/Outputs DQ8-DQ14 Data Inputs/Outputs DQ15A-1 Data Input/Output or Address Input Chip Enable Output Enable Write Enable Reset/Block Temporary Unprotect Ready/Busy Output BYTE Byte/Word Organization Select Supply Voltage Ground Not Connected Internally U2, FLASH, 16M, 3.3V TSSOP, 90NS U3, SDRAM, 64MBIT, 2MX32, 3.3V U201, AUDIO MATRIX, S028...
  • Page 65 Integrated Circuit Diagrams U205, OP AMP, DUAL, HI CURRENT U204, U305, U405, U504 OP AMP, DUAL, SINGLE SUPPLY Inputs Output Select A 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 Integrated Circuit Diagrams U601, CS4955-CQ, ENCODER, VIDEO, DIG U602, VIDEO SW, 2-IN, 3-CH, SSOP16 U603, U604, DUAL VIDEO AMP, SSOP-8 U701 Truth Table 74VCHU04, INVERTER, 5V U301, U802, U803 VOLT REG, 3.3V, 3.5A. SMPS...
  • Page 67 Integrated Circuit Diagrams U704, KS88C01532, IR CODE, QFP44 Pin Function Table...

  • Page 68: Changing House Codes

    (Switches 1 up, 2 down, 3 up, 4 down.) 1.7 Release the Store key, the system remains off. 1.8 Using the remote, turn the AV28 media center on 1 2 3 4 5 6 7 8 9 and then off. This will complete the process of storing the new house code.

  • Page 69: Zone 2 Operation

    1.3 Make sure the house code switches match those of the customer’s other remote. If the house code for the AV28 media center has been set for the customer’s other remote, it is not necessary to reprogram it to match the second Zone 2 remote control.

  • Page 70: Console-Key Special Function Features

    Console-Key Special Function Features With the system off and powered applied, the following features are active as long as the “Store” key is held down. Releasing the “Store” key cancels the mode unless otherwise noted. 1. House Code: Pressing “Store” allows you to set the product’s house code for the RF remote. Refer the “Changing House Codes”...
  • 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...
  • Page 72 ® Lifestyle Model AV28 Media Center ©2008 Bose Corporation Service Manual Part Number 264563...
  • 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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