McIntosh-MA5100-pre-sm 维修电路原理图.pdf

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1、MA 5100PREAMP - AMPLIFIERSERVICE INFORMATIONS T A R T I N G W I T H S E R I A L N O . 21HOOMclNTOSH LABORATORY INC. 2 CHAMBERS STREET BINGHAMTON, NEW YORKMA 5100RadioFans.CN 收音机爱 好者资料库MA 5100ELECTRICAL SPECIFICATIONSPower Output:90 watts RMS continuous, 45 watts per channel operating simultaneously

2、into4 ohm or 8 ohm loads.60 watts RMS continuous, 30 watts per channel operating simultaneously into16 ohm loads.Harmonic Distortion:Less than 0.25% at rated power output from 20Hz to 20,000Hz with both chan-nels operating.Intermodulation Distortion:Less than 0.25% for any combination of frequencies

3、 from 2QHz to 20,000Hzif instantaneous peak power is 90 watts per channel or less into 4 or 8 ohmloads and 60 watts per channel or less into 16 ohm loads with both channelsoperating.Frequency Range:At rated output both channels: 0.5dB 20Hz through 20,000Hz.Output Impedance:4 ohm, 8 ohm, 16 ohm. No i

4、mpedance switching required.Internal Impedance/Damping:Less than .04 ohms; damping factor greater than 100.Input Sensitivity And Impedance:Auxiliary, Tape, Tuner, and Tape Monitor: 300mV, 250K ohms.Phono 1 and Phono 2: 2mV, 47,000 ohms.Tape Head: 2mV, 1/2 megohm.Hum And Noise:High Level Inputs: 75dB

5、 below rated output.Low Level Inputs: 70dB below 10mV input.Power Amplifier: 90dB below rated output.Tape Output:300mV at rated sensitivity, 1.4 volts with 10mV at phono input.Left Plus Right Output:Adjustable 0 to 6 volts from generator impedance of less than 5,000 ohms.Bass Controls:+18dB at 20Hz.

6、Treble Controls:+l8dB at 20,000Hz.HF Filter:Flat, or 5,000Hz cutoff.LP Filter:Plat, or 50Hz cutoff.Power Requirements;117 volts AC, 50-60Hz, 70 watts at zero signal output, 200 watts at ratedoutput.RadioFans.CN 收音机爱 好者资料库MA 5100 BLOCK DIAGRAMMA 5100MA 5100PREAMP. SECTION PRINTED CIRCUIT BOARD 043-98

7、9PREAMP. SECTIONMA 5100 154-411HEAVY LINE SHOWS PRIMARY SIGNAL PATHPOWER OUTPUTSECTIONMA 5100 154-376HEAVY LINE SHOWS PRIMARY SIGNAL PATHMA 5100OUTPUT MONITOR PRINTED CIRCUIT BOARD 043-821( NOTE 1 )LEFT CHANNEL POWER OUTPUT SECTION PRINTED CIRCUIT BOARD 043-919RIGHT CHANNEL POWER OUTPUT SECTION PRIN

8、TED CIRCUIT BOARD 043-919FILTER SECTIONMA5100 154-410FILTER SECTION PRINTED CIRCUIT BOARD043-990MA 5100FILTER SECTION PRINTED CIRCUIT BOARD 043-990SCHEMATIC NOTESMA 5100Unless otherwise specified: Resistance values are in ohms, 1/2 watt, and 10%tolerance; capacitance values smaller than 1 are in mic

9、rofarads (mfd); capacitancevalues greater than 1 are in picofarads (pF) ; inductors are in microhenries (H).Printed circuit board components are outlined on the schematics by dotted lines.The circled numbers on the dotted lines correspond to the numbers of the PC boardlayouts.The heavy lines on the

10、schematics denote the primary signal path.The terminal numbering of rotary switches is for reference only.All voltages indicated on the schematics are measured under the following condi-tions :a. Use of an 11 megohm input impedance VTVM,b. All voltages 10% with respect to chassis ground.c. No signal

11、 at input terminals,d. AC input at 117 volts AC, 50/60Hz.e. Front panel controls at:Input SelectorMode SelectorAUXSTEREOVolumePowerMAXONAll other controls in normal position.1. In units with serial numbers below 46H01, the output monitor PC board is notused.2. In units with serial numbers below 44H5

12、0: R256 & R25? are not used; R254 &R255 are 120 ohms; transistors Q205 & Q206 (132-021) and pots R221 & R222(134-120) are used; the emitter of Q2l5 & Q216 is connected as shown by thedotted line; C221 & C222 are used.3. In early units, C5 & C6 were 39pF.4. In units with serial numbers below 30H15: L

13、201, L202, R241, R242, C215,C216, C217, and C2l8 are not used; C227, C228, C229, C230, C231, and C232are used; R229 & R230 are 100 ohms; C201 & C202 are 330pF.5. In early units, C207 & C208 were 200F, 3V (part number 066-086).6. In units with serial numbers below 30H30: D201 & D202 were two diodes(p

14、art number 070-022).7. In units with serial numbers below 28H00: C3, C4 C5, C6, R9, R10, andR314 are not used.8. In early units, C308 & C309 were 10,000F, 40V (part number 066-090).9. In units with serial numbers below 24H05: R237 & R238 are .47 ohms; R233& R234 are 220 ohms; C211, C212, C213, and C

15、2114 are .01F.10. In units with serial numbers below 23H7S: D211, D212, D213, and D214 arenot used.11. In units with serial numbers below 22H00: R227 & R228 were 1K, 1 0 % , 1W,12. In units with serial Nos below 54H60: R254 and R255 are 18 and F201,F202, F203j and F204 are 3A fuses. (Part Ho. 089019

16、)LOCATION OF TRANSISTORS NOT ON PRINTED CIRCUIT BOARDSPOWER SUPPLYSECTIONMA 5100 154-331MA 5100REPLACEMENT PARTSA l l parts not listed are common items obtain-able from radio parts jobbers.Replacement parts may be obtained when orderedby PART NUMBER from:Mclntosh Laboratory, Inc.Customer Service Dep

17、artment2 Chambers StreetBinghamton, New York 13903(telephone 607-723-3512)SymbolNumberC1 ,2C7,8C9 ,10C11 , 12C 1 3 , 14C15, 16C17, 18C19,20C21 ,22C23,24C101 , 102C103, 104C107, 108C11 1C1 12, 113C203,204C207,208C21 1 ,212C213,214C 2 2 3 , 2 2 4C304C305C306C307C308C309D201 ,202D203,204D205,206D207,20

18、8D209,210D21 1 ,212D213,214CAPACITORSDescriptionMylar .22F 250VMylar .1F 250VElect. 100F 12VMylar .1F 250VMylar .1F 250VMylar .47F 75VMylar .47F 250VElect. 100F 12VMylar .47F 250VMylar .22F 200VMylar . 1 F 250VMylar .01F 250VMylar .22F 250VTa. Elect. 1F 35VTa. Elect. 1.5F 35VElect. 100F 12VElect. 18

19、0F 3VMylar .047F 250VMylar .047F 250VElect. 10F 25VPartNumber064-043064-037066-127064-037064-037064-039064-045066-127064-045064-087064-038064-040064-043066-091066-092066-127066-111064-044064-044066-005Elect. 80/80/150/50F 066-103200/200/150/150VElect. 200/500F100/50VElect. 200/500F-100/-75VElect. 10

20、0F 12VElect. 9300F 45VElect. 9300F 45VDIODESS i . reference diodeSi. rectifierSi. rectifierS i . signal diodeSi. signal diodeSi. rectifierS i . rectifier066-099066-093066-127066-106066-106070-040070-030070-030070-022070-022070-031070-031D301D302D303D304D305D306D307D308D309F201 ,202F203,204F301L201 ,

21、202Q1,2Q3,4Q5,6Q7,8Q9, 10Q11,12Q101 , 102Q103, 104Q201 ,202Q203,204Q207,208Q209,210Q 2 1 1 ,212Q 2 1 1 ,212Q213,214Q215,216Q217,218Q219,220R53R58R63R63R64R64R247Si. rectifierSi. rectifierSi. rectifierSi. rectifierSi. rectifierSi. rectifierSi. rectifierSi. rectifierS i . rectifierFUSESFuse 4A (SFE-4)

22、Fuse 4A (SFE-4)Fuse 2.5A Slo-BloCHOKESChoke 2HTRANSISTORSSi. NPN transistorSi. NPN transistorSi. NPN transistorSi. NPN transistorSi. NPN transistorSi. NPN transistorSi. NPN transistorSi. PNP transistorSi. PNP transistorSi. PNP transistorSi. NPN transistorSi. PNP transistorSi. NPN transistor (forunit

23、s above 22H60)S i . NPN transistor (forunits below 22H60)Si. NPN transistorSi. PNP transistorSi. NPN transistorSi. NPN transistorPOTENTIOMETERSBalance controlVolume ControlBass control (w/flat shaft)Bass control (w/knurledshaft)Treble control (w/flatshaft)Treble control (w/knurledshaft)L & R adjust0

24、70-031070-031070-031070-031070-041070-041070-041070-041070-030089-021089-021089-015122-064132-041132-041132-051132-041132-057132-051132-057132-029132-029132-029132-021132-032132-515132-022132-521132-527132-533132-533134-035134-033134-172134-162134-173134-163134-063MA 5100MA 5100 SCHEMATIC PART NO. 0

25、38-376BE042004MA 5100R231 ,232R237,238R239,240R250,251R301R302,303R307R308R311R312R313S1S2S3S4S5S101S102S103S201S301S302S303T301TR201 ,202SB201 ,202RESISTORSWirewound 3 . 6k 5WWirewound .33 ohms 5WWirewound .47 ohms 5WWirewound 200 ohms 5WWirewound 100 ohms 5WWirewound 220 ohms 5WWirewound 100 ohms

26、5WWirewound 220 ohms 5WWirewound 7.5 ohms 5WWirewound 500 ohms 5WWirewound 220 Ohms 5WSWITCHESInput selector switchCompensation switchTape monitor switchMode selector switchLoudness switchL F switchHF switchPhase switchSpeaker switchPower switchThermal cut outThermal cut outTRANSFORMERSPower transfo

27、rmerTHYRISTORS & TRIGGERSTriacBilateral switchMODULESTone Control moduleCompensation moduleFRONT PANEL & TRIMFront panelFront panel end cap right)Front panel end cap (left)Volume control knobBalance control knobInput control knobMode selector knobTreble knob (rear)Treble knob (front) - forflat shaft

28、139-013139-036139-050139-009139-008139-009139-008139-009139-010139-011139-009146-035148-019148-012146-105148-019148-019148-019148-019148-012148-005153-007153-007043-551131-001131-002130-007130-026043-725018-043018-044043-253043-253043-253043-253090-009043-625Treble knob (front) - forknurled shaftBas

29、s knob (rear)Bass knob (front) - forflat shaftBass knob (front) - forknurled shaftLAMPSPanel illumination #1864Switch indicator #334MOUNTING SYSTEMShelf bracket right)Shelf bracket (left)Mounting template #100Hardware packageMISCELLANEOUS ITEMSPlastic feetShipping cartonOwners manualLine cordShorting plugFuseholder15C1114S6-M9376090-008090-009043-625090-008058-028058-003043-234043-235038-179043-557017-041043-727038-129170-021127-001178-001