Bose-Companion20-mss-sm维修电路原理图.pdf

2011 Bose CorporationReference Number 329509-SM Rev. 02Service ManualCompanion 20Multimedia Speaker SystemBose Triport OE HeadphonesElectronic Copy OnlyRadioFans.CN 收音机爱 好者资料库2CONTENTSWarranty .3Safety Information.3Product Description .3Date of Manufacture Information .3Serviceability.3Serial Number Information.3Specifications.4Packaging Part List, Companion 20 (see Figure 1) .5Figure 1. Companion 20 Packaged System.5I/O Label Replacement.6Listening Test Procedure . 7-8Service Manual Revision History .9CAUTION: The Companion 20 multimedia speakers system contains no user-serviceableparts. To prevent warranty infractions, refer servicing to factory service. PROPRIETARY INFORMATIONTHIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OFBOSE CORPORATION WHICH IS BEING FURNISHED ONLY FORTHE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCTBY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THEBOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USEDFOR ANY OTHER PURPOSE.Part List Notes1. This part is not normally available from Customer Service. Approval from the Field Service Manageris required before ordering.2. The individual parts on the PCBs are listed in the Electrical Part list.3. This part is critical for safety purposes. Failure to use a substitute replacement with the samesafety characteristics as the recommended replacement part might create shock, fire and/or otherhazards.4. This part is referenced for informational purposes only. It is not stocked as a repair part. Refer to thenext higher assembly for a replacement part.5. The part number listed is an assembly part number. The individual parts of the assembly might notbe available separately.RadioFans.CN 收音机爱 好者资料库3The Companion 20 multimedia speaker system is covered by a 1-year transferrable, limitedwarranty.WARRANTYSerial Number and Date of Manufacture InformationThe date of manufacture (DOM) and the product code are encoded within the serial numberlocated on the product label.Serial Number Example -055102Z10630052BEThe first 6 characters identify the product code - 055102Characters 8 to 11 identify the DOM - 10631063 = the 63rd day of 2011The Compainion 20 is a two-piece computer speaker system.- Acoustic performance that meets or exceeds Wave Music System- An elegant industrial design, form factor, and controls- An industrial design that evolves the Companion family line- Two 3.5 mm inputs and one headphone jack- Includes a control pod similar to Companion 3 and 5 Product DescriptionServiceabilityThe system is not serviceable, the rear enclosure is attached to the front panel and it is notpossible to repair to board or component level. Left and right speakers, control pod, speakergrille, power supply and audio cable are available as service parts (see page 5).SAFETY INFORMATIONParts that have special safety characteristics are identified by the symbol on schematics orby special notes on the parts list. Use only replacement parts that have critical characteristicsrecommended by the manufacturer.4SPECIFICATIONSMechanical Dimensions: Individual Speaker: 8.6“ H x 3.5” W x 4.4” D (22 x 9 x 15 cm) Weight: One speaker: 2.5 lbs (1.1 kg) Control Pod: 0.5 lbs (.2 kg) Electrical Power Pack Rating:AC Input: 100 VAC to 240VAC AC Input Freq: 50Hz to 60Hz AC Input Current: 1.5A (rms) max. for 115VAC .8A (rms) max. for 230VAC Speaker Inputs: Input Power: 18V, 2.0A Input Signal: 2.25V Maximum input Driver Complement: Two 2.75 inch (70mm) high excursion, wide-range transducers 5PACKAGING PART LISTCompanion 20Figure 1. Packaged SystemItem Description Part Number Notes 1 PC SPEAKER ASSY, LEFT 346248-002S 2 PC SPEAKER ASSY, RIGHT 346248-001S 3 GRILLE ASSY (includes logo and tape) 346310-001S 4 CONTROL POD 346309-001S 5 POWER SUPPLY 330733-0020 3, 6 INPUT CABLE 346312-001S 7 LINE CORD, US LINE CORD, EU LINE CORD, UK LINE CORD, JP LINE CORD, AP 279101-1310 280135-1310 280138-1310 280136-1310 284243-1310 3, 8 CARTON 342934-0010 9 PACKAGING TRAY, TOP 345628-0010 10 PACKAGING TRAY, BOTTOM 345629-0010 - I/O LABEL 343766-0010 - BAG, SPEAKER ASSEMBLY 347853-0010 - COMMITMENT LETTER 325526-0010 - OWNERS GUIDE, US OWNERS GUIDE, EU OWNERS GUIDE, AP 344837-0010 344838-0010 344839-0010 612574108396I/O LABEL REPLACEMENTCompanion 20 I/O label replacementEquipment Required-Hot Air Gun-Small Flat blade screw driver or dental pick-New I/O Label, P/N 343766-00101. I/O label removal1.1 Using a hot air gun, heat the I/O labelsurface for 3 to 5 seconds.1.2 Use a small flat head screwdriver or dentalpick to lift the top right corner of the label.1.3 Once the right top corner is lifted, continuelifting by hand to remove it fully away from theassembly.1.4 Remove all glue left on the assembly byhand, then clean using a duster cloth.2. I/O label replacement2.1 Use Bose part number 343766-0010 as thereplacement I/O label.2.2 Place the new label one the assemblystarting from the bottom.2.3 Once the label is in place, apply an evenamount of pressure for 4 to 6 seconds acrossall areas of the label.7LISTENING TEST PROCEDURETest Equipment required:Audio Signal GeneratorTest Set upConnect speaker cable from the left speaker to the right speaker.Connect an audio signal to the audio input cable and connect the cable to the input jack on the leftspeaker.Connect the power adapter to the power input on the right speaker.NOTE: For all listening tests (air leak and sweep test), listening should be done at a distance of2 feet (0.6 meters) in a quiet environment. Listening distance must be decreased to 1 foot (0.3meters) in a noisy environment. All testing is to be performed on each individual speaker of thepair, with the volume control knob set to the maximum volume setting and both A and B inputsconnected. There should be no audible distortion during any test.1. Air Leak Test1.1 Apply a 50 mVrms, 50 Hz audio signal to the input of the right speaker.1.2 Set the volume control pod to the maximum volume setting.1.3 Listen carefully for air leaks from the cabinet seams around the transducer and at the inputterminals.1.4 Replace system if air leaks can be heard.2. Frequency Sweep test2.1 Apply a 50 mVrms, 35 Hz audio signal to the input.2.2 Set the volume knob to the maximum volume setting.2.3 Listen carefully as you sweep the bass module from 35 Hz to 3 kHz, then from 3 kHz to 35 Hz.2.4 Listen carefully for buzzes, rattles, or other extraneous noises from the speaker cabinet. Aslight whooshing sound from the port (at approximately 70 Hz) is acceptable.2.5 Replace system if buzzes or rattles can be heard from the cabinet.83. Control Pod Functional Test3.1 With the system completely set up, turn on the system by tapping on the control pod. Confirmsystem is on by looking for the white LED.3.2 Set the volume knob on the control pod to maximum (fully clockwise).3.3 Touch the center of the control pod . Verify that the LED turns on and off with each touch.3.4 Lower the volume to minimum (fully counter clockwise) on the control pod and connect anauido source to the “Audio Input” jack.3.5 Adjust the volume control to a comfortable listening level and verify that the sound is muted andun-muted when the LED is off and that there is no audible pop when switching from mute to un-mute.3.6 Rotate the control pod ring, verify that the volume increases and decreases and that the ringmoves smoothly.3.7 Replace any control pod that is defective.4. Control Pod AUX and Headphone Test4.1 With the system off (no LED), connect an audio source to the AUX connector on the controlpod.4.2 Turn on the system and set the volume to a cmfortable listening level.4.3 Confirm audio can be heard.4.4 Connect a headset to the headphone input on the control pod.4.5 Confirm audio from the speakers are muted when the headphones are connected to thecontrol pod.4.6 Confirm audio can be heard from the headphones.Test Procedures9SERVICE MANUAL REVISION HISTORYDate Revision Level Description of Change Change Driven ByPages Affected 7/11/11 00 Document released at revision 00 Service Manual release All 12/02/11 01 Test procedure referred to bass module and satellites. Updated procedure with corrected information. Errors in original manual 81/31/13 02 Input power rating corrected. Error in original manual 4SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICEBose CorporationThe MountainFramingham Massachusetts USA 01701P/N:329509-SM Rev. 02 7/2011 (H)http:/