Bose lifestyle 20 service manual
This is the 96 pages manual for bose lifestyle 20 service manual.
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Extracted text from bose lifestyle 20 service manual (Ocr-read)
Page 1
1 CAUTION: THE BOSE ¨ MODEL 20 (CD-20) MUSIC CENTER CONTAINS NO USER-SER- VICEABLE PARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICE TO WARRANTY SERVICE STATIONS OR FACTORY SERVICE. Contents Safety Information ........................................................................\ .................................................... 2 Electrostatic Discharge Sensitive (ESDS) Device Handling ........................................................ 3 CD-20 Manual Revision Overview ........................................................................\ ......................... .3 Specifications ........................................................................\ ........................................................ 4-7 Theory of Operation ........................................................................\ .................................... ........ 8-13 Figure 1. CD-20 Block Diagram ........................................................................\ ............................. 13 Disassembly/Assembly Procedures ........................................................................\ ............... 14-15 Figure 2. Disassembly/Assembly View ........................................................................\ .................. 16 Figure 3. Exploded View of Door ........................................................................\ ........................... 17 RC-20 Remote Disassembly/Assembly ........................................................................\ ................ 18 Figure 4. RC-20 Disassembly/Assembly View ........................................................................\ ....... 18 CD Mechanism Disassembly Procedures ........................................................................\ ....... 19-23 Test Procedures ........................................................................\ ........................................ ........ 24-28 Figure 5. Tuner Alignment Locations ........................................................................\ ...................... 28 Remote Control Alignment ........................................................................\ ............................... ..... 29 Figure 6. RC-20 Tuning Locations ........................................................................\ ......................... 29 Alignment Procedures ........................................................................\ ................................... ... 30-31 Part List Notes ........................................................................\ ........................................ ................ 32 Main Part List ........................................................................\ ......................................... ................. 33 Figure 7. CD-20 Exploded View ........................................................................\ ............................. 34 CD Mechanism Part List ........................................................................\ ................................. ....... 35 Figure 8. CD Mechanism Exploded View ........................................................................\ ............... 36 Electrical Part List ........................................................................\ ................................... .......... 37-48 Figure 9. RC-20 Remote Exploded View ........................................................................\ ............... 48 RC-20 Remote Part List ........................................................................\ ................................. ........ 49 RC-20 Remote Electrical Part List ........................................................................\ ................... 49- 50 Packaging Part List ........................................................................\ .................................... ............ 51 Figure 10. Packaging Exploded View ........................................................................\ .................... 51 Accessory Part List ........................................................................\ .................................... ............ 52 Figure 11. Accessory Packaging ........................................................................\ ........................... 52 IC Block Diagrams and Pinouts ........................................................................\ ....................... 53- 55 CD Mechanism IC Block Diagrams ........................................................................\ .................. 56-59 CD Mechanism IC Pin Configuration Tables ........................................................................\ .. 60-66 CD Mechanism IC and Transistor Voltage Tables .................................................................. 67-68 CD Mechanism Troubleshootin g........................................................................\ .................... .69-8 6 CD-20 Troubleshooting Waveform s........................................................................\ ............... .8 7-9 1 Last updated 9 /20 /00 Includes S4, S5 , S6 , S8, and S9
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2 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 acceptably insulated from the supply circuit before returning the unit to the customer. Use the following checks to perform these measurements: A. Leakage Current Hot Check-With the unit completely reassembled, plug the AC line cord directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI) C101.1 ÒLeakage Current for AppliancesÓ and Underwriters Laboratories (UL) 1492 (71). With the unit AC switch first in the ON position, then in the OFF position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the unit (antennas, handle bracket, metal cabinet, screw heads, metallic overlays, control shafts, etc.), especially any exposed metal parts that offer an electrical return path to the chassis. Any current measured must not exceed 0.5 milliamp. Reverse the unit power cord plug in the outlet and repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZ- ARD THAT MUST BE ELIMINATED BEFORE RETURNING 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 be- tween 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 be between 1 and 5.2 Megohms. When there is no return path to the chassis, the reading must be ÒinfiniteÓ. If it is not within the limits specified, there is the possibility of a shock hazard, and the unit must be repaired and re- checked before it is returned to the customer. SAFETY INFORMATION 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.