Bose-1800V-pwr-sup5维修电路原理图.pdf

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1、1 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.C

2、AUTION: THE EQ PCB ASSEMBLIES CONTAIN NO USER-SERVICEABLE PARTS. TOPREVENT WARRANTY INFRACTIONS, REFER SERVICING TO WARRANTY SERVICESTATIONS OR FACTORY SERVICE.ContentsSafety Information. 2Electrostatic Discharge Sensitive (ESDS) Device Handling . 3Supplement Description. 3Test Procedures . 4Part Li

3、st Notes. 5Electrical Part List.6-7PCB Layout. 8Figure 1. PCB SMD Bottom View . 8Figure 2. PCB Component Top View. 8Figure 3. Model 8 and Model 25/32 Schematic Diagram . 9RadioFans.CN 收音机爱 好者资料库2 1. Parts that have special safety characteristics are identified by the symbol on schematics or by speci

4、al 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. Us

5、e the following checks to perform these measurements:A. Leakage Current Hot Check-With the unit completely reassembled, plugthe AC line cord directly into a 120V AC outlet. (Do not use an isolationtransformer during this test.) Use a leakage current tester or a meteringsystem that complies with Amer

6、ican National Standards Institute (ANSI)C101.1 “Leakage Current for Appliances” and Underwriters Laboratories(UL) 1492 (71). With the unit AC switch first in the ON position, then in theOFF position, measure from a known earth ground (metal water pipe,conduit, etc.) to all exposed metal parts of the

7、 unit (antennas, handle bracket,metal cabinet, screwheads, metallic overlays, control shafts, etc.), especiallyany exposed metal parts that offer an electrical return path to the chassis.Any current measured must not exceed 0.5 milliamp. Reverse the unit powercord plug in the outlet and repeat test.

8、 ANY MEASUREMENTS NOT WITHINTHE 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 andconnect a jumper wire between the two prongs of the plug. (2) Turn on

9、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

10、to the chassis, the reading must be “infinite”. 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 INFORMATIONRadioFans.CN 收音机爱 好者资料库3ELECTROSTATIC DISCHARGE SENSITIVE (ESDS)

11、This unit contains ESDS devices. We recommend the following precautions when repairing,replacing, or transporting ESDS devices: Perform work at an electrically grounded work station. Wear wrist straps that connect to the station or heel straps that connect to conductive floormats. Avoid touching the

12、 leads or contacts of ESDS devices or PC boards even if properlygrounded. Handle boards by the edges only. Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert unpro-tected devices into materials such as plastic, polystyrene foam, clear plastic bags, bubble wrapor pl

13、astic trays.DEVICE HANDLINGThis supplement should be used along with the 1800V EQ PCB service manual part number181812-S2. The disassembly/assembly procedures, and packing part list should be used alongwith the information in this manual. The test procedures were included in this manual for yourconv

14、enience.SUPPLEMENT DESCRIPTION4Frequency Output Tolerence95Hz+12.3dB1.5dB250Hz+4.4dB1.5dB1kHz0dBReference-2kHz+1.7dB1.5dB4kHz+7.6dB1.5dB8kHz+12.0dB1.5dB12.5kHz+15.0dB2.5dBFrequency Output Tolerence95Hz+12.3dB1.5dB250Hz+4.4dB1.5dB1kHz0dBReference-2kHz+1.7dB1.5dB4kHz+7.6dB1.5dB8kHz+12.0dB1.5dB12.5kHz+

15、15.0dB2.5dBFrequency Output Tolerence95Hz+11.3dB1.5dB250Hz+4.5dB1.5dB1kHz0dBReference-2kHz+3.0dB1.5dB4kHz+7.0dB1.5dB8kHz+10.5dB1.5dB12.5kHz+11.75dB2.5dBTEST PROCEDURES2.2 Adjust the amplifier volume controls tomaximum. No EQ card installed.2.3 Reference a dB meter to the output ofthe amplifier.2.4 S

16、hut off the amplifier and insert the EQcard according to the assembly procedure.2.5 Turn on the amplifier and measure thegain. There should be a -4.8dB change ingain at the output.2.6 Reference a dB meter and measurethe response of the EQ card according tothe Model 25/32 Full Range Responsechart bel

17、ow.1.7 Shut off the amplifier. Open the inputpanel and switch the high frequency/fullrange switch to the high frequency position.1.8 Measure the response according to theModel 25/32 High Frequency Responsechart below.2.7 Shut off the amplifier. Open the inputpanel and switch the high frequency/fullr

18、ange switch to the high frequency position.2.8 Measure the response according to theModel 25/32 High Frequency Responsechart below.1. Model 8 EQ PCB Response Test1.1 Apply a signal of 1kHz at an input levelof 100mVrms.1.2 Adjust the amplifier volume controls tomaximum. No EQ card installed.1.3 Refer

19、ence a dB meter to the output ofthe amplifier.1.4 Shut off the amplifier and insert the EQcard according to the assembly procedure.1.5 Turn on the amplifier and measure thegain. There should be a -3.5dB change ingain at the output.1.6 Reference a dB meter and measurethe response of the EQ card accor

20、ding tothe Model 8 Full Range Response chartbelow.2. Model 25/32 EQ PCB Response Test2.1 Apply a signal of 1kHz at an input levelof 100mVrms.Frequency Output Tolerence95Hz+11.3dB1.5dB250Hz+4.5dB1.5dB1kHz0dBReference-2kHz+3.0dB1.5dB4kHz+7.0dB1.5dB8kHz+10.5dB1.5dB12.5kHz+11.75dB2.5dBModel 8 Full Range

21、 Response ChartModel 25/32 Full Range Response ChartModel 25/32 High Freq. Response ChartModel 8 High Freq. Response Chart5PART LIST NOTES1. This part is not normally available from Customer Service. Approval from the Field ServiceManager is required before ordering.2. The individual parts located o

22、n the PCB are listed in the Electrical Part Lists.3. This part is critical for safety purposes. Failure to use a substitute replacement withthe same safety characteristics as the recommended replacement part might create shock, fireand or other hazards.4. The reference designators that are in bold p

23、rint are used on the model 8 EQ PCB assembly.6ELECTRICAL PART LISTResistorsReferenceDesignatorDescriptionPartNumberNoteR120.0K, 1206, 1/8W, 1%124894-2002R2, 16, 17, 1910.0K, 1206, 1/8W, 1%124894-10024R214.0K, 1206, 1/8W, 1%124894-14024R3, 1422.1K, 1206, 1/8W, 1%124894-2212R3, 134.12K, 1206, 1/8W, 1%

24、124894-41214R5, 278.25K, 1206, 1/8W, 1%124894-8251R5, 25887, 1206, 1/8W, 1%124894-88704R911.5K, 1206, 1/8W, 1%124894-1152R11110K, 1206, 1/8W, 1%124894-1103R12150K, 1206, 1/8W, 1%124894-1503R12100K, 1206, 1/8W, 1%124894-10034R13, 16, 204.99K, 1206, 1/8W, 1%124894-49914R1416.5K, 1206, 1/8W, 1%124894-1

25、6524R17, 227.15K, 1206, 1/8W, 1%124894-71514R18, 194.75K, 1206, 1/8W, 1%124894-4751R223.92K, 1206, 1/8W, 1%124894-3921R25, 35, 36, 40-45JUMPER, CHIP124896R266.19K, 1206, 1/8W, 1%124894-6191R2715.0K, 1206, 1/8W, 1%124894-15024R3121.5K, 1206, 1/8W, 1%124894-2152R3278.7K, 1206, 1/8W, 1%124894-7872R37,

26、3847.0K, 1206, 1/8W, 5%124895-4735CapacitorsReferenceDesignatorDescriptionPartNumberNoteC2.068uF, BOX, 85, 63V, 5%137127-683C2, 8, 10.047uF, BOX, 85, 63V, 5%137127-4734C3.27uF, BOX, 85, 50V, 5%137127-274C3.33uF, BOX, 85, 50V, 5%137127-3344C6.0033uF, BOX, 85, 100V,5%137127-3324C10.056uF, BOX, 85, 63V

27、, 5%137127-563C11.033uF, BOX, 85, 63V, 5%137127-3334C11, 12.0056uF, BOX, 85, 100V,5%137127-562C20, 22.022uF, BOX, 85, 100V,5%137127-223C24, 26, 48-5110000pF, CHIP, 5%124959-103C25, 27.0027uF, BOX, 85, 100V,5%137127-272C27.0022uF, BOX, 85, 100V,5%137127-22247ELECTRICAL PART LISTDiodesReferenceDesigna

28、torDescriptionPartNumberNoteD1, 2, 3, 51N4148, 52MM, AXIAL121501D4, 6ZEN, 18V, 1W, 5%,1N4746A116995-4746AIntegrated CircuitsReferenceDesignatorDescriptionPartNumberNoteU1, 2IC, OP AMP, QUAD144008U3IC, SWITCH, ACTIVE,SIP-8, BA3128N 177292PCB LAYOUTFigure 1. PCB SMD Bottom ViewFigure 2. PCB Component

29、Top View89Figure 3. Model 8 and Model 25/32 Schematic Diagram2R54312345678ABCDDCBAFRAMINGHAM, MA 01701-91688761+15V+15V+15V+15V+15V-15V-15V-15V-15V-15VR39NUR450R440R410R400C27OPTR420R430114123U1RC4156ND61N4746AD41N4746AD51N4148D31N4148D21N4148D11N4148C26.01C24.01RC4156N141312U2R34N.U.R360R350R3847kC

30、1N.U.C2.068R120kR2OPTC3OPTR3OPTR4N.U.C5N.U.RC4156N8910U1R5OPTC6OPTR6N.U.R7N.U.C4N.U.C7N.U.C8.047C10OPT114123U2RC4156NR11110KR13OPTR8N.U.C9N.U.R12OPTR10N.U.R911.5KR16OPTR15OPTR18OPTC13N.U.R14OPTR19OPTR17OPTRC4156N765U1C12.0056C11OPTC14N.U.C15N.U.RC4156N8910U2R25OPTR27OPTR21N.U.C16N.U.R266.19KR23N.U.R

31、24N.U.R204.99kR22OPTC17N.U.C25.0027R33N.U.RC4156N765U26J15J12J13J1R3747kRC4156N141312U1C19N.U.C18N.U.C20.02215486732U3NJM2120VEEVCC-INB+INB-INA+INASWOUTR3121.5K7J1R3278.7KR30N.U.R28N.U.C23N.U.C22.022C21N.U.R29N.U.1J1C48.01C49.01C50.01C51.014J1Model 8, and Model 25/32 ? EQ PCB 184844? Page 1 of 1Serv

32、ice Manual 181812-S5 REV 00Note: See the part list for the proper value of OPT components.1800 SERIES V PROFESSIONAL AMPLIFIER58122040OFF0.25123.558122040OFF0.25123.5dBPEAK/PROTECTONSTANDBYPEAK/PROTECT1 CHANNEL 2036912ONTModel 1800-V Professional Stereo PowerAmplifier EQ PCB AssembliesSupplement1997 Bose CorporationService ManualPart Number 181812-S5Bose CorporationThe MountainFramingham Massachusetts USA 01701SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICEP/N 181812-S5 REV. 00 11/97 FOR TECHNICAL ASSISTANCE OR PART ORDERS, CALL 1-800-367-4008