LEM-TM15_2-spk-sm 维修电路原理图.pdf

1 rCODE : 277322Index & WarningsSoldering point.Male connector.Female connector.M/F faston connector.Test point.Supply voltage.Logic supply ground.Analog supply ground.Signal ground.Chassis ground.Flag joined with one or more flags with the same signal name inscribed.NoticeService must be carried out by qualified personnel only. Any tampering carried out by unqualified personnel during the guarantee period will forfeit the right to guarantee.For a correct operation of the instrument, after having switched off, be careful to wait at least 3 seconds before switching on again.To improve the devices specifications, the schematic diagrams may be subject to change without prior notice.Schematic NotesAll components marked by this symbol have special safety characteristics, when replacing any of these components use only manufacturers specified parts.The (?) micro symbol of capacitance value is substituted by U. The () omega symbol of resistance value is substituted by E. The electrolytic capacitors are 25Vdc rated voltage unless otherwise specified. All resistors are 1/4W unless otherwise specified.All switches shown in the OFF position. All DC voltages measured to ground with a voltmeter 20KOhm/V.ATTENTIONObserve precautions when handlingelectrostatic sensitive devicesSERVICE MANUALSchematic DiagramsGENERALMUSIC S.p.a. Sales Division:47842 S.Giovanni in Marignano (RN) ITALY - Via delle Rose, 12 - tel. 0541/957404 - fax0541/957404 - http:/RadioFans.CN 收音机爱 好者资料库r 2RadioFans.CN 收音机爱 好者资料库3 r+-+r 45 rr 6Spare Parts1887074XLR MALE-FEMALE SIGNAL CABLE (mt. 1.5)2768030DISPLAY & SETTING BOARD3768126SIGNAL INPUTS CONTROLS & MIDI INTERFACE BOARD4768043POWER AMPLIFIER BOARD5768042POWER SUPPLY BOARD6768128CONVY PROCESSOR BOARD7767987MAINS FILTER BOARD (EU)7768002MAINS FILTER BOARD (US)8667613CONTROLS PANEL9667610METAL GRID10659027CYL. KNOB WHITE CAP11717054WOODEN CABINET12347287PLASTIC HANDLE13347286HANDLE SET14347187RUBBER HANDLE15237064TRANSFORMER (EU)15237065TRANSFORMER (US)162290302 COMPRESSION DRIVER TWEETER17347283COMPRESSION DRIVER HORN1822703815 SPEAKER19177476AMPLIFIER HEAT SINK20177325STAND ADAPTOR21150591DISPLAY RED GLASS22141202XLR MALE SOCKET23141184XLR FEMALE SOCKET24140526GRAY BUTTON25140212DIN SOCKET26130297MAINS CORD (EU)26130283MAINS CORD (US)27120319WL 4x15 MAINS CORD SCREW28120125M5x35 MAINS CORD SCREW29120111M6x25 MAINS CORD SCREW30120108M5x30 MAINS CORD SCREW31120099M4x25 MAINS CORD SCREW32120098M4x20 MAINS CORD SCREW33110614MAINS INLET (EU)(US)341102972 POLES 2 POS. SLIDE SWITCH35110291MAIN SWITCH (EU)(US)36180637ADHESIVE GENERALMUSIC-LEM BRAND37177474DRIVER HOLDERInputs Controls Panel7 rBIAS ADJUSTMENTInstruments, materials and tools:- Audio Generator- Dual Trace Oscilloscope- Digital Voltmeter (or Multimeter)- 4 500W and 8 100W Resistors- Temperature MeterSetup:- Connect the Audio Generator to the input and set its output at 2KHz sinusoidal signal.- Insert the temperature sensor through the interstize between the heatsink and R93 (PTC).- Connect the 4 500W resistor to the amplifier output instead of the woofer speaker and 8 100W instead of tweeter speaker.- Connect the oscilloscope probes (setting 20V/div.,1ms/div.) on the loads.- Insert the voltmeter terminals on R107.ADJUSTMENT PROCEDURE1) Turn on the amplifier, pressing UP DOWN and MIDI simultaneously, check that the display shows C.2) Set the input signal to 0dB (0.775Vrms).3) When the temperature has reaches about 45C (109F) set the signal input to minimum (0 or -).4) Adjust the trimmer R111 to read a voltage of 6mV 0.1 on the multimeter.5) Check that the voltage across the R108 resistor has the same value.6) At the same temperature condition, adjust the VR1 trimmer to read 2.2mV 0.1 at R24 resistor.7) Check that the voltage on the R25 resitor has the same value.Veryfing:1) Increase the input level to obtain an output voltage about of 0.5Vpp.2) Check with the oscilloscope that the output signal is without a cross-talk distortion and eventually slightly adjust the R111 or VR1 position until distortion disappears. (Note: the voltage value across the R107 or R108 resistor must not exceed 10mV and the R24 or R25 resistor must not exceed 4mV).LIMITER ADJUSTEMENT1) Increase the input level to 10dB, adjust the trimmer VR1 until clipping distortion disappears.2) Verify tha the led change colour from green to red.3) Re-connect the speakers instead of the 4 and 8 resistors.TOUR MASTER 15,2 ACTIVE - Technical SpecificationSPEA KER SPECIFICA TIONSCOMPONENTSHigh2 driver with controlled directiv ity hornLow15 low frequency speakerHIGH section POWER HANDLINGW continuous75(EIA RS-426A)W peak240LOW section POWER HANDLINGW continuous800(EIA RS-426A)W peak2400IMPEDANCE (nominal)Highohm8 Low4CONSTRUCTIONCabinet: birch playwood Finish: Black scratch-resistant paint Protection grille: metal grilleWEIGHTkg - lbs.48,5 - 106,8DIMENSIONSmm - in.470 x790 x465 (LxAxP) - 185x311x183(WxHxD)PROCESSOR SPECIFICA TIONSINPUTSensitivitydB0 (0.775Vrms)ImpedanceKohm30 (balanced) - 15 (unbalanced)A/D converterbit18D/A converterbit18Dynamic rangedB105Sampling rateKHz48CROSSOVERFrequencyHz1350SlopedB/oct.24HIGH section POWER AMPLIFIERW continuous150LOW section POWER AMPLIFIERW continuous650AMPLIFIERS DISTORTIONTHD +Noise0,02%CONTROLSVOLUME controlUP & DOWN selector buttonsMIDI buttonEarth LiftDISPLAY2-digit displaySIGN/COMP LEDCONNECTORS1 XLR-F +1 XLR-M (input + link) MIDI in & MIDI THRUPOWER SUPPLY230V 15% 50/60Hz - 115V 15% 50/60HzSYSTEM SPECIFICATIONSFREQUENCY RESPONSEHz50 20000 (-10dB)SENSITIVITY SPL 1W/1m dB98MAX SPL continuous127DISPERSION ANGLEhorizontal 60 (10)vertical40 (7)DIRECTIVITY Factor (Q)12DIRECTIVITY Index DidB11 (+2.8 , -4)Note:the system specifications have been calculated using PRESET n.1 FLATr 8Notes:Each spare part is single quantity unless otherwise specifiedAsterisk prefix explanation:Omitted= First level spare part.One asterisk= Second level, part of previous listed first level part.Two asterisks= Third level, part of previous listed second level part.Three asterisk=.Any request for not above mentioned part must encompass specific description including:1) Model name,2) Section,3) Module code,4) Reference name,5) Quantity number.SPARE PARTS LISTACCESSORIES887074XLR Female-Male Signal Cable (1.5mt)277310Owners ManualASSEMBLY667613Controls Panel659027Cyl. Knob White Cap237064Transformer (230V)237065Transformer (115V)150591Display Red Glass110614Mains Socket110291Power Switch110037T6.3A Fuse 6.3x32mm (US)110035T2.5A Fuse 6.3x32mm (US)110034T800mA Fuse 6.3x32mm (US)110022T8A Fuse 6.3x32mm (US)110029T4A Fuse 5x20mm (EU)110023T8A Fuse 5x20mm (EU)110018T6.3A Fuse 5x20mm (EU)110015T800mA Fuse 5x20mm (EU)110014T2.5A Fuse 5x20mm (EU)667506Left Side Bar717054Wooden Cabinet667610Metal Grid347287Plastic Handle347286Plastic Set3472832 Comprission Driver Horn347187Plastic Grip2290302 Compression Driver Tweeter22703815 Speaker177474Driver Holder177325Stand Adapter130297Mains Cord (EU Version)130283Mains Cord (US Version)CONVY Processor Board758128CONVY Processor Board (PCB#313020)230569*FL5R200PNT EMI Coil For Signal141059*Con V M 9 C Mini Mate Burndy141015*Con V F 14c P=1.27 Mmatch Amp141013*Con V F 10c P=1.27 Mmatch Amp141010*4 Contacts Vert Female Connector100943*MC33079 Quad Ln Op Amp100919*MC33078 Dual LN J-Fet Operational Amplifier100737*ADMOD79 2ch Ad Delta Modulator100643*AD1865N Dual 18bit Dac100642*TS93C46 1Kbit Eeprom Memory100612*74HC374 Octal D-Type Flip-Flop100061*TL072 Dual J-Fet Operational Amplifier100059*7805 +5V 1A Voltage Regulator100058*7905 -5V 1A Voltage Regulator080103*1N4148 100mA 75V Signal Diode050494*Resistor Array 10K X5 1/8w 5%050492*10Kx8 1/8w 5% Resistor Array010722*24.576MHz Quartz Resonator010720*12MHz Ceramic Resonator With Capacitors557026*AT89C55-12JC Programmed CPU105001*CONVY Dsp ConvolverPower Supply Board768042*Power Supply Board (PCB#317191)141060*Con V M 12c Mini Mate Burndy141013*Con V F 10c P=1.27 Mmatch Amp140081*H 2c P=10 Terminal Block140069*H 3c P=10mm Terminal Block100060*7815 +15V 1A Voltage Regulator100059*7805 +5V 1A Voltage Regulator100049*7915 -15v 1a Voltage Regulator080606*GBU8D 8A Rectifier Diodes Bridge080168*W02M 1.5A Rectifier Diodes Bridge030882*10000uF 50V Snap-In Electrolytic Capacitor030881*10000uF 50V Snap-In Electrolytic Capacitor030866*4700uF 100V Snap-In Electrolytic Capacitor030858*4700uF 25V 20% Vert Electrolytic Capacitor030560*4700uF 80V 20% Snap-In Electrolytic CapacitorSignal Input Controls & MIDI Interface Board768126Signal Input, Controls & MIDI Interface Board (PCB#313019)757942*Photores Coupler141202*Hor. Male XLR Socket (M21bc Nuova Asme)141184*Hor. Male XLR Socket (NC3FPRH Neutrik)141064*9 Contacts Hor. Male Connector141010*4 Contacts Vert Female Connector140212*Horizontal Female 5 Poles Din Socket100602*74HC04 Hex Inverter100061*TL072 Dual J-Fet Operational Amplifier100035*6N138 Optocoupler090194*BC560 TO92 LN Pnp Transistor090183*BC550 To92 Ln Npn Transistor080734*Led 2.5x5mm Rect Diff Red-Grn LED080245*7V5 1W 5% Zener Diode080103*1N4148 100mA 75V Signal Diode074570*5K lin. 31 clicks Potentiometer070125*1K 20% Vertical Linear Trimmer140526*Gray ButtonDisplay & Setting Board768030*Display & Setting Board (PCB#319046)141015*Con V F 14c P=1.27 Mmatch Amp140526*Microswitch 100V 100ma 0.8mm080717*HDN1105 7 Segments DisplayMains Filter Board767987*Mains Filter Board (Pcb#315016) (EU)768002*Mains Filter Board (Pcb#315016) (US)230565*2.5mH 250V 3A AC Line Filter140010*3 Contacts P=10 Vert Terminal Block110113*Fuse Clip 5x20mm 6A max (EU)110114*Fuse Clip 6.3x32mm 10A Max (US)020493*100n 250Vac MKP EMI Capacitor “Siemens”010719*2n2 250Vac 7A 20% AC Line “Y” Filter “Murata”Power Amplifier Assembly727524Power Amplifier Assenbly768043*Power Amplifier Board (PCB#319044)141059*9 Contacts Vert. Male Connector141058*6 Contacts Vert. Male Connector110316*Relay 24V / 1 Switch no 16A 250V110307*Relay 24V / 2 Switch 5A 250V100084*TL074 Quad J-Fet Operational Amplifier100061*TL072 Dual J-Fet Operational Amplifier090920*Mje803 TO126 Npn Darl Transistor090917*MJE350 TO126 Pnp Transistor090916*MJE340 TO126 Npn Transistor090201*2N5401 TO92 Pnp Transistor090200*2N5550 TO92 Npn Transistor090924*MJL21194 NPN Transistor090923*MJL21193 PNP Transistor090920*MJE802P PNP Transistor090919*MJE15031 PNP Transistor090918*MJE15030 NPN Transistor090917*MJE350 PNP Transistor090916*MJE340 NPN Transistor090863*TIP36C PNP Transistor090862*TIP35C NPN Transistor080282*13V 1W 5% Zener Diode080261*10V1W 5% Zener Diode080245*7V5 1W 5% Zener Diode080241*5V6 1W 5% Zener Diode080171*FE6B 6A 100V Fast Recovery Diode080156*1N4002 1A 100V Rectifier Diode080103*1N4148 100mA 75V Signal Diode070106*470E 20% Horizontal Linear Trimmer070082*220E 20% Horizontal Linear Trimmer080819*PTC 70 Pth59f04bg222ts080607*KBPC25 25A 200V Bridge Rectifier Diode080606*GBU8D 8A Rectifier Diodes Bridge