Infinity-BU1-sub-sm 维修电路原理图.pdf

BU1Powered SubwooferA Harman International CompanyPart No.: 1112-BU1 11/98Technical ManualTechnical ManualINFINITY SYSTEMS INC.250 Crossways Park DriveWoodbury, New York 11797RadioFans.CN 收音机爱 好者资料库1Powered SubwooferBU1BU1 SPECIFICATIONSDriver.8 WooferNominal Impedance .4 ?Enclosure Design.Tuned PortAmplifier Power.50 watts RMSFrequency Response.45Hz - 150Hz ( 3dB)Crossover Frequency.50 to 150 Hz Continuously VariableInputsLine Level .RCA jacksHigh Level .(Speaker) Input terminalsOutputs.Full range SpeakerSensitivityLow Level .50mVHigh level .1VInput ImpedanceLow Level .10k?High level .4.7k?DimensionsInches.11 x 11 x 11Metric.29.2 x 29.2 x 29.2cmplus 1 (32mm) for feetOccasional refinements may be made to existing products without notice, but will always meet orexceed original specifications unless otherwise stated.TABLE OF CONTENTSBU1 SPECIFICATIONS .1BU1 CONTROLS AND THEIR FUNCTION .2BU1 TEST PROCEDURE.3BU1 AMPLIFIER BLOCK DIAGRAM.4BU1 CABINET EXPLODED VIEW .5AMPLIFIER EXPLODED VIEW.6BU1 MECHANICAL PARTS LIST .7BU1 ELECTRICAL PARTS LISTS .8BU1 PACKAGING EXPLODED VIEW .10INTEGRATED CIRCUIT DIAGRAMS.11PCB (TOP VIEW, component side).12PCB (BOTTOM VIEW, solder side).13PREAMP/CROSSOVER SCHEMATIC 120V .14AMPLIFIER SCHEMATIC 120V .15THIS MANUAL IS FOR THE BU1 REVISION WITHOUT AN EXTERNAL POWER SWITCHRadioFans.CN 收音机爱 好者资料库2Powered SubwooferBU1BU1 CONTROLS AND THEIR FUNCTION120V,60Hz130WLOW LEVELINPUTRLLLRRPOWER505015010080120VOLUMECONTROLWARNING:TO REDUCE THE RISK OF FIRE OR ELECTRICSHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.NRTL/CUL-1492CAUTIONRISK OF ELECTRIC SHOCKDO NOT OPENWARNING: SHOCK HAZARD-DO NOTOPEN.AVIS: RISQUE DE CHOC ELECTRIQUE-NE PAS OUVRIR.120V60Hz 130WMODEL BU1HCMNOTSUITABLE FOR IN-WALLMOUNTINGONOFFHIGH LEVEL INPUTHIGH LEVEL OUTPUTFREQUENCYHzAUTOPOWERMINMAX123541. Auto Power - This Auto On/Off switch controlswhether the BU1s Automatic turn-on circuit isactive. When the switch is ON , the BU1 will turnitself on, indicated by a green LED, when it isplugged in and receiving a signal. When the BU1has not received a signal for approximately tenminutes, the unit will revert to the STANDBY mode,indicated by a red LED. When this switch is OFF,the unit will revert to the STANDBY mode and willstay OFF, regardless of input signal. THIS IS NOTA TRUE AC POWER SWITCH AS IT DOES NOTDISCONNECT THE AMPLIFIER FROM THE120VAC LINE.2. High Level Inputs - These High Level Inputs are forreceivers that do not have line-level “pre-amp out”or “subwoofer out” jacks. When a pair of main orsatellite speakers are attached to the OUTPUTterminals, they are driven the full range offrequencies as generated by the music source(receiver, amplifier, etc.)3. Low Level Input - These left and right Line LevelInputs are normally used when thereceiver/processor has line-level “pre-amp out ”or “subwoofer out” jacks. If a single cable monoor subwoofer source is connected to the BU1, aY-cable must be connected to the subwoofer forfull output.4. Volume Control - This controls the volume levelof the subwoofer.5. Frequency - The Frequency adjustment determinesthe upper corner roll-off point for the BU1.TEST PROCEDUREEquipment needed:?Function/signal generator/sweep generator?Integrated Amplifier?Multimeter?Cables - line level (RCA) and speaker cablesGeneral FunctionUUT = Unit Under Test1.Connect both right and left line level inputs (RCA) tosignal generator and UUT. Use Y-cable if necessary frommono source. VOLUME control should be fullcounterclockwise.2.Turn on generator, adjust to 25mV, 50 Hz.3.Plug in UUT; red LED should be ON. Turn VOLUMEcontrol full clockwise.4.LED should turn Green; immediate bass response shouldbe heard and felt from port tube opening.5.Turn off generator, turn VOLUME control fullycounterclockwise, disconnect RCA cables.6.Connect one pair of speaker cables to either high levelinput terminal on UUT. Cables should be connected to anintegrated amplifier fed by the signal generator.7.Turn on generator and adjust so that speaker level outputis 1.0V, 50 Hz. Turn VOLUME control full clockwise.8.Green LED should light, immediate bass response shouldbe heard and felt from port tube opening.Sweep Function1.Follow steps 1 - 4 above, using a sweep generator as asignal source.2.Sweep generator from 20Hz to 300Hz. Listen to thecabinet and drivers for any rattles, clicks, buzzes or anyother noises. If any unusual noises are heard, remove driverand test.Driver Function1.Remove driver from cabinet; detach + and - wire clips.2.Check DC resistance of driver; it should be 3.3 ohms.3.Connect a pair of speaker cables to driver terminals.Cables should be connected to an integrated amplifier fed bya signal generator. Turn on generator and adjust so thatspeaker level output is 5.0V.4.Sweep generator from 20Hz to 1kHz. Listen to driver forany rubbing, buzzing, or other unusual noises.3Powered SubwooferBU1BU1 TEST PROCEDURE4Powered SubwooferBU1BU1 AMPLIFIER BLOCK DIAGRAM5Powered SubwooferBU1BU1 CABINET EXPLODED VIEW6Powered SubwooferBU1AMPLIFIER EXPLODED VIEW3256781391210191916161817171820141521311441BU1AmplifierExplodedViewEEDDCCBBAA776655443322117Powered SubwooferBU1BU1 MECHANICAL PARTS LISTSRef. #Part #DescriptionQty.1XX1342GASKET 1 OF 442XX1275Plastic Cover For Inf. Bu-1(2)13XX1250Strain Relief SPT-1 Black24SC1194Screw 6-32x3/8 Tapt-Thr Hex Washr25NU1049Nut 8-32 x 1/4 Hex Keps Sink F2(XFORMER)6MI1210POWER TRANSFORMER BU-117NU1059Nut 4-40Keps-Thr,Hexag. Znk Fs2(THERMOSWITCH)8XX1343KNOB BLACK29SC1215Screw M3x1.25x10 Plas-Thr Pan-Phi3(SPK CONNECTOR, RCA CONNECTOR)10SC1214Screw 8-32x1/2 Mach-Thr Pan-Phil2(XFORMER)11SC1253Screw 4-40 x3/8 Pan Phillips Hd Mc2(THERMOSWITCH)12HA1132HARNESS AC CORD BU-1/BU-21(FRONT PLATE)13SW1082THERMOSWITCH 60 DEG C PANEL1MOUNTED FASTON TERM(FRONT PLATE)14SP1082SPONGE W/ADHESIVE L=1/4 W=1/42T=3/16 (BIAS XTOR, THERMISTOR)Ref. #Part #DescriptionQty.15SP1073Sil Pad TO-220 0.750 x 0.500216BR1395Bracket Pwr Support217NU1057Hex Nut Keps 6-32 Zinc Fsh2(BRACKET SUPPORT)18BR1566FIN-XTOR BAR TO-218 USED ON BU1219SC1285SC 6-32 x 3/4” MACH-THR PAN PHI4HEAD BLACK ZINC FSH (XTOR BARTO2182X, BRACKET SUPPORT2X)20HA1218SPK HARNESS AWG 18 MOLEX TO1FASTON .187 AND .250(PLASTIC COVER)21BR1537FRONT PLATE BU-11XX1369GASKET PWR XMER 4.20 x 1.45 x11/16 (FRONT PLATE)NOT SHOWN8Powered SubwooferBU1Ref.#Part #DescriptionQty.CapacitorsC1, 2CP1545CAP ALUM ELECT 4700uF 20% 50V2SNAP-IN 30 x25mmC3, 4, 5, 11CP1552SMD Cap .1uF 20% 100v Z5U 12104C6, 7, 15, 16,CP1426SMD CAP 0.1uF 20% 50V Z5U1421, 22, 25,1206 T/R110, 111, 115,116, 117, 126,127C8, 9, 12CP1475SMD Cap 33pF 5% 50v NPO 12063C10, 23, 24, 133CP1496SMD CAP 100pF 10% 50V X7R 12064C13CP1412Cap Alum El. 47uF 20% 16v Rad.1C14CP1528SMD CAP 0.1uF 10% 50V X7R 1206 T/R 1C18, 19, 27,CP1645Cap Al El 22uF 20% 63V 85 Deg528, 32C26CP1562Cap Alum El. 330uF 20% 16v T/R1C29CP1808Cap Poly Fil 0.01uF Class X21C30, 31CP1844SMD CAP CERAMIC 0.01uF 10%2200V X7R 1206 T/RC101, 102, 103,CP1415Cap Alum El. 2.2 uF 20% 50v T/R5104, 113C107, 119, 120CP1424Cap. Alum El. 10uF 20% 16V T/R3C108, 109, 118CP1646SMD Cap 220pF 5% 50V X7R 12063C112CP1417Cap Alum El. 22uF 20% 16v T/R1C114CP1411Cap Alum El. 100uF 20% 16v T/R1C121, 122CP1539Cap. Poly Fil .047uF 5% 63V TR2C124CP1679Cap. Poly Fil .068uF 5% 63V1C125CP1632Cap.Poly.Film0.033uF,5%, 63VT/R1DiodesD1, 2, 3, 4DI1005Rectifier Diode 3A/200V 1N54014D5, 6, 7, 8, 9,DI1132SMD Diode Swch LL-34 Pkg T/R1315, 16, 17,RLS414818, 101, 102,103, 104D14DI1010Diode Fast Rect. 1A/100v Axial1Z101, 102DI1127SMD Zener 5.6v 5% CP Pkg. T/R2Z1, 2DI1150SMD Zener 15v 5% CP Pkg. T/R2Ref.#Part #DescriptionQty.Integrated CircuitsIC1, 102, 103IC1041IC SMD DUAL J-FET-INPUT3OP AMP T/R TLO72IC101IC1162IC SMD Quad-J Fet Input OP Amp1TLO74ResistorsJ1, 2, 3, 4, 5,RS1779SMD RES ZERO ohm 5% 1/8W 1206166, 7, 101,102, 103, 104,105, 106, 107,108, 109R1, 2RS2310RES CER 0.1 ohm 5% 3W2RADIAL BULKR3, 4RS1916RES C/F 5.1 ohm 5% 1/4W T/R2R5RS1994RES C/F 100 ohms 5% 1/4W T/R1R6, 20, 21, 34RS1831SMD RES 7.5Kohm 5% 1/8W 12064R7RS1871SMD RES 5.1Kohm 5% 1/8W 12061R8RS1878SMD RES 10 ohm 5% 1/8W 12061R9, 10, 26, 35,RS1701SMD RES 10Kohm 5% 1/8W 12061440, 43, 44,54, 109, 110,111, 113,121, 123R11, 12, 15, 17RS1717SMD RES 100 ohm 5% 1/8W 12064R13, 14, 32, 57RS1722SMD RES 470 ohm 5% 1/8W 12064R16, 23, 41RS1706SMD RES 47Kohm 5% 1/8W 12063R18, 39, 119RS1703SMD RES 2.2Kohm 5% 1/8W 12063R19, 22RS1725SMD RES 15Kohm 5% 1/8W 12062R24, 126, 134,RS1700SMD RES 1Kohm 5% 1/8W 12064136R25, 118RS1710SMD RES 3.3Kohm 5% 1/8W 12062R27, 28, 29RS1898SMD RES 10Kohm 1% 1/8W 12063R30RS2160SMD RES 11Kohm 1% 1/8W 12061R31, 124, 138RS1767SMD RES 1Mohm 5% 1/8W 12063R33RS1877SMD RES 4.3Kohm 5% 1/8W 12061R36, 37RS2424RES M/O F/P 220 ohm 5% 1W T/R2R38, 55, 58,RS1705SMD RES 4.7Kohm 5% 1/8W 12068101, 106, 107,108, 139R42, 102, 103,RS1702SMD RES 100Kohm 5% 1/8W 120610104, 105, 116,122, 128, 137,142BU1 ELECTRICAL PARTS LISTSRef.#Part #DescriptionQty.R51, 52RS1715SMD RES 5.6Kohm 5% 1/8W 12062R56RS1005RES C/F 100 ohms 5% 1/2W T/R1R112RS1872SMD RES 51Kohm 5% 1/8W 12061R114RS1793SMD RES 470Kohm 5% 1/8W 12061R117RS1968SMD RES 2.2Mohm 5% 1/8W 12061R120RS1892SMD RES 10Mohm 5% 1/8W 12061R125RS1883SMD RES 1.5Kohm 5% 1/8W 12061R129RS1783SMD RES 12Kohm 5% 1/8W 12061R131RS2419SMD RES 430Kohm 5% 1/8W 12061R132, 133, 140RS1704SMD RES 22Kohm 5% 1/8W 12063R135RS1712SMD RES 43Kohm 5% 1/8W 12061R141RS1791SMD RES 39Kohm 5% 1/8W 12061TransistorsQ1TR1346TIP35C1Q2TR1347TIP34C1Q3TR1183TIP31C1Q4TR1184TIP32C1Q5, 18TR1043MPS2222A2Q6, 9, 15, 20TR11662N54014Q7, 8TR11672N55512Q10, 12, 16TR1131DTC114TK3Q11TR11082SC2412K1Q17, 101, 102TR11252SZ1037K3Q19TR10102N2907A1Ref.#Part #DescriptionQty.MiscellaneousCONN101CO1334JACK SPEAKER OCTAL PC1MOUNT RIGHT ANGLEF1FS1086FUSE SLO-BLO 1A 250V 5x20 3AG1FUSE1XX1297Fuse Clip 5x20 PC Mount2HARNESSHA1186HARNESS 7-POSITION 0.11CENTER-CENTER L=4 (ConnectsPower Board to PreAmp/Cross-Over Board)K1RE1026RELAY PC MOUNT 24V 6A1L1MI1100Inductor Air Core 0.38uH1LED101LE1032Led Bicolor Red/Green 5mm1PCBS (BLANK)CL1232BLANK PCBs WITH CONNECTOR1RCA102CO1407CONNECTOR RCA DUAL VERT.1PC MOUNT WHT/RED R/A GOLDSW101SW1084SWITCH SLIDE DPDT R/A PC MOUNT1SPKOUTCO1343Strght Sq Hdr 0.156Center1T1MI1210POWER TRANSFORMER BU11TH1TH1006NTC THERMISTOR 10Kohm 25DegC1VR101RS2426POT 20K DUAL 16mm B-TAPER1VOLUMEVR102RS1794POT 50Kohm 20% LOG TAPER 15A1FREQUENCY9Powered SubwooferBU110Powered SubwooferBU1BU1 PACKAGING EXPLODED VIEW11Powered SubwooferBU1INTEGRATED CIRCUIT DIAGRAMS12Powered SubwooferBU1PRINTED CIRCUIT BOARDS (TOP VIEW, component side)13Powered SubwooferBU1PRINTED CIRCUIT BOARDS (BOTTOM VIEW, solder side)14Powered SubwooferBU1PREAMP/CROSSOVER SCHEMATIC 120V VERSION15Powered SubwooferBU1POWER SCHEMATIC 120V VERSION