Bose 321 and 321 gs series i 270000 service manual rev2

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1 CONTENTS Contents........................................................................\ ............................................... ..................... 1 3-21 and 321 GS Home Entertainment System Differences ...................................................... 2 Software Update Information ........................................................................\ ............................ ...... 2 Accessories ........................................................................\ ............................................ ................... 2 Warranty ........................................................................\ ............................................... ...................... 2 Safety Information ........................................................................\ ..................................... ............... 3 Electrostatic Discharge Sensitive (ESDS) Device Handling ......................................................... 3 Specifications ........................................................................\ ......................................... ............... 4-7 Part List Notes ........................................................................\ ........................................ ................... 8 Packaging Part List, 321 Home Entertainment System Packaging View (see Figure 1) .......... 8 Figure 1. 3-21 Home Theater System Packaging View ................................................................... 9 Packaging Part List, 321 GS (Gemstone) Home Entertainment System (s\ ee Figure 2) ......... 10 Figure 2. 321 GS (Gemstone) Home Theater System Packaging View ....................................... 11 Part List, 321 and 321 GS Home Theater Systems Accessory Kit (see Figure 3) ................ 12 Figure 3. Accessory Kit Exploded View ........................................................................\ .................. 12 Main Part List, 321 and 321 GS Console Assembly (see Figure 4) ........................................ 13 Figure 4. Console Exploded View ........................................................................\ ........................ ...14 Main Part List, Bass Module Assembly (see Figure 5) ................................................................ 15 Figure 5. Bass Module Assembly Exploded View ........................................................................\ ... 15 Main Part List, Bass Module PCB Assembly (see Figure 6) ........................................................ 16 Figure 6. Bass Module PCB Assembly Exploded View .................................................................. 16 Main Part List, 321 GS Array Assembly (see Figure 7) ............................................................. 17 Figure 7. 321 GS Array Assembly Exploded View ....................................................................... 17 Electrical Part Lists ........................................................................\ .................................. .........18-37 Console Main PCB Assembly ........................................................................\ .......................... 18-34 Console LCD Display PCB Assembly ........................................................................\ ............. 34-35 Bass Module PCB Assembly........................................................................\ ........................... 36-37 Disassembly Procedures ........................................................................\ ................................. 38-40 Test Procedures ........................................................................\ ........................................ ........41-45 321 System Date of Manufacture Information ........................................................................\ ... 45 Parental Control Information ........................................................................\ ........................... ...... 46 Table 1. 321 Console DVD Parental Control Rating Codes .......................................................... 46 Changing the 321 Console Region Code ............................. ................................................46-47 Table 2. Region Code Tap Commands and Responses .................................................................. 47 Computer Setup Procedure ........................................................................\ ............................. 48 -49 Figure 8. LCD Display PCB P/N: 254550-001 Rev. 00 Topside Etch Diagram ............................. 50 Figure 9. LCD Display PCB P/N: 254550-001 Rev. 00 Bottom Etch Diagram ............................. 50 Figure 10. LCD Display PCB P/N: 254550-001 Rev. 01 Topside Etch Diagram ........................... 51 Figure 11. LCD Display PCB P/N: 254550-001 Rev. 01 Bottom Etch Diagram ........................... 51 Figure 12. LCD Display PCB P/N: 254550-001 Rev. 02 and 03 Topside Etch Diagram .............. 52 Figure 13. LCD Display PCB P/N: 254550-001 Rev. 02 and 03 Bottom Etch Diagram ............... 52 Figure 14. Bass Amplifier PCB P/N: 254574-001 Rev. 00 Etch Layout Diagram ........................ 53 Figure 15. Bass Amplifier PCB P/N: 254574-001 Rev. 01 Etch Layout Diagram and Bass Amplifier PCB P/N: 266469-001 Rev. 00 Etch Layout Diagram ........................ 54 Figure 16. Bass Amplifier PCB P/N: 266469-001 Rev. 01 Etch Layout Diagram ........................ 55 Figure 17. Bass Amplifier PCB P/N: 268858-001 Rev. 00 Etch Layout Diagram ........................ 56 Glossary of Terms ........................................................................\ ...................................... ............. 57 Service Manual Revision History ........................................................................\ ........................ ... 58

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2 CAUTION: The Bose 321 and 321 GS Home Entertainment Systems contain no user-serviceable parts. To prevent warranty infractions, refer servicing to warranty service stations or factory service. PROPRIETARY INFORMATION THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF BOSE CORPORATION WHICH IS BEING FURNISHED ONLY FOR THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED FOR ANY OTHER PURPOSE. Accessories The Bose Model 321 and 321 GS home entertainment system shelf speakers are compatible with Bose mounting accessories, including the UB-20 wall brackets, UFS-20 floor stands and UTS-20 table stands. The firmware located in the main PCB and display PCB's microprocessors can be updated by means of an update CD. These update CDs are available from Bose ® Product and Technical Support at 800-233-4408 (Bose service centers only) or 800-367-4008 (Bose system owners) and are automatically sent out to customers who have purchased the 321 system and filled out and returned the software update card that came with their system literature. Service centers can also download an ISO image of the latest firmware update file from the Service web site at http://serviceops.bose.com and burn it onto a CD for use as an update disc. Once you have the CD, simply power up the console, press the stop/eject button on the con- sole, place the update CD into the drawer and close it and the update process will begin. When the process is complete you may remove the update CD. Check to verify that both the display PCB firmware and the main PCB firmware have updated properly. You can do this by using the TAP commands or by a series of button presses on the console front panel. Both of these methods are outlined later in this service manual.Software Update Information 321 and 321 GS Home Entertainment System Differences The 321 and 321 GS (Gemstone) home entertainment systems share the same basic com- ponents. The bass module and bass module cable are identical. The console uses the same electronic parts and most of the same chassis parts. The differences in the console are the console firmware and the color of the silver front bezel and DVD drawer bezel. The product label on the console reads "Model AV3-2-1GS Media Center". The arrays used on the two systems are different. The standard 321 system uses the larger 60mm driver arrays, and are only available in graphite. The 321 GS arrays utilize the smaller 50mm Jewel Cube ® driver. These arrays are available in graphite and silver. The Bose 321 and 321 GS Home Entertainment Systems are covered by a limited 1-year transferable warranty. WARRANTY