McIntosh MA6100 B Operating and installation instructions

MA 6100
PREAMP AMPLIFIER
SERVICEINFORMATION
STARTINGWITHSERIALNO.AE1001
MclNTOSHLABORATORYINC.2 CHAMBERSSTREETBINGHAMTON,NEWYORK
MA
6100

MA 6100
PERFORMANCELIMITS
PERFORMANCE
Mclntoshaudiopowerratingsareinaccordance
withtheFederalTradeCommissionRegulationof
November4,1974concerningpoweroutputclaims
foramplifiersusedinhomeentertainmentproducts.
POWEROUTPUT
70wattsminimumsinewavecontinuous
averagepoweroutput,perchannel,
bothchannelsoperatinginto8 ohms
loadimpedancewhichis:
23.7voltsRMSacross8 ohms
40wattsminimumsinewavecontinuous
averagepoweroutput,perchannel,
bothchannelsoperatinginto16ohms
loadimpedancewhichis:
25.3voltsRMSacross16ohms
OUTPUTLOADIMPEDANCE
8ohmsor16ohms
RATEDPOWERBAND
20Hzto20,000Hz
TOTALHARMONICDISTORTION
0.2%maximumharmonicdistortionat
anypowerlevelfrom250milliwattsto
ratedpowerperchannelfrom20Hzto
20,000Hz,bothchannelsoperating
INTERMODULATIONDISTORTION
0.2%ifinstantaneouspeakpoweroutputistwice
ratedcontinuousaveragepowerorlessperchannel
withbothchannelsoperatingforanycombinationof
frequencies20Hzto20,000Hz
FREQUENCYRESPONSE
20Hzto20,000Hz+0-0.5dBatratedpower
NOISEANDHUM
Poweramplifier:95dBbelowratedoutput
Aux,Tape,Tuner:90dBbelowratedoutput
PhonoInput, TapeHd.:76dBbelow10mVinput
RATINGS
OUTPUTVOLTAGE
AtTAPEoutput:Aux,Tape,Tuner:300mVwith
input
Phono:300mVwithratedinput;
1.2voltswith1.0mVinputat1000
Hz
TapeHd:300mVat500Hzwith
ratedinput
DAMPINGFACTOR
50at8 ohmsoutput
100at16ohmsoutput
INPUTSENSITIVITYANDIMPEDANCE
PowerAmplifier:3 volts,100,000ohms
Phono1 andPhono2:2.5mVat1000Hz,47,000
ohms
TapeHead:3 mV,47,000ohms
Tape,Aux,andTuner:300mV,250,000ohms
BASSCONTROLS
+16dBto-16dBat20Hz
TREBLECONTROLS
+16dBto-16dBat20,000Hz
LFFILTER
Activefilter,12dBperoctaverolloffbelow50Hz;
20dBdownat20Hz
HFFILTER
Activefilter,12dBperoctaverolloffabove7000Hz;
20dBdownat20,000Hz
GENERALINFORMATION
SEMICONDUCTORCOMPLEMENT
36SiliconTransitors,22SiliconRectifiersandDi-
odes,2 SiliconBilateralSwitches,2 Triac
POWERREQUIREMENTS
120Volts,50/60Hz,50wattsatzerosignaloutput,
380wattsatratedoutput
MECHANICALINFORMATION
SIZE
Frontpanelmeasures16incheswide(40.64cm)by
57/16incheshigh(13.81cm).Chassismeasures
15incheswide(38.1cm)by13inchesdeep(33.02
cm),includingPanlocshelfandbackpanelcon-
nectors.Knobclearancerequiredis1½(3.81cm)in
frontofmountingpanel
WEIGHT
34pounds(15.42kg)net,46pounds(20.87kg)in
shippingcarton

MA6100BLOCKDIAGRAM

TONE & VOLUME CONTROL PC BOARD 044-514
NOTE10
MA6100
MA 6100
RIGHT CHANNEL PREAMP PC BOARD 044-512
EQUALIZATION PC BOARD 044-420
LEFT CHANNELPREAMP PC BOARD 044-512

PREAMPSECTION
MA6100 154-632

MA 6100 MA 6100
POWEROUTPUT
SECTION
MA6IOO 154-631

MA 6100
LEFTCHANNEL
POWEROUTPUT
PC BOARD 044-480
RIGHTCHANNEL
POWEROUTPUT
PC BOARD 044-480

MA 6100
REG& PHASEINVERTER PC BOARD 044-419
Q418
Q416
Q417
Q415
LOCATIONOFTRANSISTORSNOTONPCBOARD
TOP
BOTTOM
TOP
BOTTOM

MA 6100
POWERSUPPLY
SECTION
MA6IOO154-616

MA6100SCHEMATICNOTES
1.Unlessotherwisespecified:Resistancevaluesareinohms, 1/4watt,
and10%tolerance;Capacitancevaluessmallerthen1 areinmicrofarads
(µF);capacitancevaluesgreaterthan1 areinpicofarads(pF);
inductorsareinmicrohenries( µH).
2. Printedcircuitboardcomponentsareoutlinedontheschematicsby
dottedlines.Thecirclednumbersaroundthedottedlinescorrespond
tothenumbersonthePCBoardlayouts.
3. Theheavylinesontheschematicsdenotetheprimarysignalpath.
4.Theterminalnumberingofrotaryswitchesisforreferenceonly.
5. Allvoltagesindicatedontheschematicsaremeasuredunderthe
fol1owingconditions:
6.InunitswithSerialNo'sbelowAE1453;C415& C416are1000pF.
C413& C414are1000µFandC407& C408are470pF.
7.InearlyexportunitsR429,R430,R447& R448are47
8.InunitswithSerialNo'sbelowAE2557;CI17andC118are12pF.
9.InunitswithSerialNo'sbelowAE2075;R309isD308.(Mclntosh
PartNo.070-064)
10.InunitswithSerialNo'sbelowAE2122;R211& R212areMclntosh
PartNo.134-354andR227& R228areMclntoshPartNo.134-253.
11.InunitswithSerialNo'sbelowAE3988;R421, R422,R423& R424
are1005%1/2W;R425,R426,R427,& R428areused;D417,
D418,D419& D420arenotused;R437andR438areusedandD4I5
andD416arenotused.
a.Useofan11megohminputimpedanceVTVM.
b.Allvoltages±10%withrespecttochassisground.
c.Nosignalatinputterminals.
d.AC input at120 volts, 50/60 Hz.
e.Frontpanelcontrolsat:
VolumeFul1yCWTapemon.out
InputselectorAuxTapecopyout
ModeselectorStereoFiltersout
BalancecontrolZeroPhaseout
ComoFlatSpeakersout
TonecontrolsFlat

MA 6100
REPLACEMENTPARTS
Allpartsnotlistedarecommonitemsobtain-
ablefromradiopartsjobbers.
Replacementpartsmaybeobtainedwhenordered
by PART NUMBER from:
MclntoshLaboratory,Inc.
CustomerServiceDepartment
2ChambersStreet
Binghamton,NewYork13903
(telephone[phone])
Symbol
Number
C101 , 102
C105, 106
C107,108
C111 , 112
C113,114
C115,116
C119, 120
C123, 124
C125,126
C127, 128
C129, 130
CI31 ,132
C137,138
C201,202
C209.210
C212 ,213
C301
C302
C303
C305
C306
C307
C312
C313,314
C317
C401,402
C403,404
C419,420
C427,428
D301,302
D303,304
D305,306
D307
CAPACITORS
Description
Mylar. 47µF
Ta.Elect10µF
Ta.Elect10µF
Mylar . 4µF
Ta.Elect-100µF
Mylar. 1 µF
Mylar. 22µF
Ta.Elect100µF
Mylar.22µF
Mylar. 1 µF
Mylar.022µF
Mylar.01µF
Mylar.47µF
Mylar.22µF
Mylar.01µF
Mylar.022µF
Mylar. 47µF
Ta.Elect10µF
Elect.33µF
Mylar.22µF
Mylar1µF
Elect.100µF
250V
63V
63V
250V
16V
250V
16V
250V
250V
250V
250V
250V
250V
250V
250V
63V
40V
250V
40V
Elect. 80/150/150/200µF
200/200/150/100V
Elect.9300µF
Elect.220µF
Elect.150µF
Elect.470µF
Elect.10µF
Ta.Elect1.5µF
DIODES
Si . Recti f i er
Si . Recti f ier
Si . Recti fier
Zener
50V
100V
63V
4V
35V
20V
75V
Part
Number
064-069
066-221
066-178
064-069
066-226
064-067
064-068
066-226
064-068
064-067
064-102
064-040
064-069
064-068
064-040
064-102
064-069
066-221
066-204
064-096
064-088
066-206
066-191
066-162
066-201
066-?05
066-136
066-173
066-158
070-041
070-041
070-031
070-025
D417,418
D419,420
0308
D309
D401,402
D403,404
D405,406
D407,408
D409,410
D411,412
D413,414
D415,416
F401,402
F403,404
CB301
L401,402
Q101 , 102
Q 103, 104
Q105,106
Q107, 108
QI09, 110
Ql11 , 112
Ql13, 114
Q115, 116
Q301
Q302
Q303
Q401,402
Q403,404
Q405,406
Q407,408
Q409,410
Q411 ,412
Q413, 414
Q415,416
Q417 ,418
R20I
R2IO
R211
R212
Si.Rectifier
Si. Rectifier
Si. Rectifier
Zener20V
Si. Rectifier
Si. Rectifier
Si. Rectifier
Si. Rectifier
Si. Rectifier
Si. Rectifier
Ge.PNPTransistor
Si. Rectifier
FUSES
Fuse5A
Fuse5A
Circui t B reaker4A
CHOKES
Choke4µH
TRANSISTORS
Si. PNPtransistor
Si . PNPtransistor
Si . NPNtransistor
Si . NPNtransi stor
Si . NPNt ransi stor
Si . NPNtransi stor
Si . NPNtransistor
Si . NPNt ransi s tor
SI.NPNt ransi s tor
Si . PNPtransi stor
Si . NPNtransi stor
Si . PNPtransi stor
Si.PNPtransistor
Si.NPNtransistor
Si . NPNtransistor
Si.PNPtransi stor
Si.NPNtransistor
Si. PNPtransistor
Si . NPNtransistor
Si . NPNtransi stor
POTENTIOMETERS
Bal ancecont rol
Vo1umecontrol
Basstrimcont rol
Basstrimcontrol
070-046
070-046
070-031
070-064
070-047
070-046
070-047
070-047
070-031
070-031
132-098
070-047
089-014
089-014
088-007
122-105
132-096
132-096
132-095
132-093
132-093
132-093
132-095
132-095
132-094
132-096
132-078
132-056
132-056
132-081
132-021
132-032
132-080
132-079
132-128
132-128
134-240
134-239
134-354
134-254

R215
R2I6
R227
R228
R3I3
R314
R401,402
R433,434
R435,436
SI
S2
S3
T30I
SBS401,402
TR401,402
POTENTIOMETERS
Treblecontrol
Basscontrol
Trebletrimcontrol
Trebletrimcontrol
RESISTORS
Wirewound6005W
Wirewound1 . 5K5W
Wirewound3 . 6K1 0W
Wirewound.335W
Wirewound.335W
SWITCHES
Inputselectorswitch
Pushbuttonswitch
Modeselectorswitch
TRANSFORMERS
Powert ransformer
THYRISTORS& TRIGGERS
Bilateralswitch
Triac
FRONTPANEL& TRIM
Frontpanel
Front panel endcaps
Balancecontrolknob
Compcontrol knob
Bassknob(front )
Bassknob( rear )
Trebleknob(front)
Trebleknob( rear)
Volu mecont rol knob
Modeselectorknob
Inputselectorknob
LAMPS
Panel illurni nat i on# 1 866
Switchindicator#51
MOUNTINGSYSTEM
Shel f bracket(right)
Shelfbracket(left)
Mounti ngtempla te# 1 00
Hardwarepackage
MISCELLANEOUSITEMS
Plasticfeet
Shi ppi ngcar ton
Ownersmanual
Li necord
134-238
134-237
134-253
134-253
139-043
139-079
139-047
139-080
139-080
146-153
150-011
146-134
044-418
131 -004
131-005
044-423
018-154
044-375
090-100
044-375
090-100
044-375
090- 100
044-372
044-372
044-372
058-014
058-021
043-622
043-623
038-179
043-608
017-156
044-510
038-61 1
170-021
MA 6100SCHEMATICPART NO. 038-810
BE042004
20C1025S7-M4810