McIntosh MA 5100 User manual

m$mfusk

sTARTTNG

wrTH

sERIAL

No.

30H15

McINT0SH

LAB0RAT0RY

lNC.

MA S|OO

SERVIffiffi

INFORMATION

64'

2 CHAMBERSSTREET

BINGHAMTON,

NEWYORK

---

I t'rt

l.r

l-;

Unless otherwise specified, resistance values are in ohms, L/2

watt, and I0% tolerance. Capacitance values smaller than I

are in microfarads (mfd); values greater than t are in pico-

farads (pF.

) .

The terminal numbering of rotary switches and printed circuit

board wires is for reference only.

A11 voltages are measured under the following conditions:

1. Use of an lO-megohm input impedance VTVMvoltmeter.

2. AII voltages !LO% with respect to chassis ground.

3. No signal at input terminals.

4. AC input at LL7 volts, 50/60 cycles.

5. Front panel controls at:

Input Selector AIIX

Mode Selector STEREO Tape

Phase

Speaker

Power

LF Filter

HF Filter

Iroudness

NOR}iIAL

FLAT

FI,AT

NORMAL

Volume

Balance

Bass

TrebIe

Comp

IVIAX

ZERO

FI,AT

RTAA

PREAMP,SECTIONPRINTED

CIRCUITBOARD

O43-723

",';;ir

l r----.,,-k=."',i;'"Illi

",.--*4,.^r-:,:ll i

r/2 PARrum-Oza _ j

-z

tov

RII I RI7

/ SI.2 FRONT

/ (PARTIAL)

REAR

l- aux

F TAPE

O. TUXER

- PHONO I

lrJ PHONO 2

Z TAPE HO

lrl

J TAPE

l_ uorrron

TAPE

OUTPUT

tul

Le_t

lOOntd/12

RzZ 75V

t5K

ct2

-r---l_

c24

-22

;

T aux

F TAPE

o- Tur{ER

- pHolo t

IIJ PHONO2

Z rlpE Ho

tr. TAPE

LroNrToR

TAPE

OUTPUT

FRONI

'----J

ORN/WHT

L_- "!to"gglt:-J

- +R58C (FILTER SECTION)

R648

500 K

-t

vto

loo K

L rj. ",..:".

PREAMP.SECTION

PRINTED

CIRCUITEOARD

o43- 723

li--

,47

Qtl

l-"rl

tsl

LTI

.47/75V lOOald/ l2 V

RIGHTOUTPUT

HEAVY LINE SHOWS

PRIMARY

SIGNAL

PATH

ct8 40

i n: I

R64A

500 K

R55

to0K5%

oto

"r-

PREAMP.SECT

ION

MA5lOO 154

- 282

L + R58D

(FILTER

SECTIoN)

(

PRE

LEFT IIIPUT_

(FROI LEFT OUTPUT

OF PREAMP

SECTIONI

R5EB

ATP SECTION)

rl-

| + REol

7--

ti I

i I + gRl/\_

clol

.t lot R

to5 Rlo7

ro9

=l*

.,,,

*qI

."1:'- 6RED^ - Lf:

3.3X

l.av

;.?; I

26vl

)o,o, l

I nld 20*

\olo5

4v e

cll3

IaLx

cox

ur*

,"o'l

o'9-",o,

I FrAiFl

\,.o,

: E 8RN/

! o-(

I r<

| + Tqo

. r<

r tJ

I r*

lEl lEl

tut tul

:lll llll

=lEl =l*l

"ldl 'lql

tit trl

rlREo

l+i wtr

t50

R||9

r.5ilr; zoa Y

)

-17

trl

470 K

FILTER SECTION

PRI

o43

680 5*

TED

722

4.?K 5L

RCUIT

BC I

ARD :ov*-@!I-rsv

J'\

--9,-

I cntr

+ | WXT/A

\ sLK

I vlo/

I wHT

I vto/ ctoz

.r tota R106 Rlot

;

RilO

I-(

to4

cilz

RfGHT

ftfPUT

(FROM

RIGHT

OUTPUT

OFPREATP

SECTION}

aarl

-glYrb

_e!9,5

-EE9X

n lt8

."'",Agl

:l!

6Rll/

t.2x 5%

3.3K 5*

_9,

qo 35:t4

T1.8

ERll4

it=-

I drrlren

\r,-ot

58A

t 5 garz

t50

R120

r.infdao% I I t::#8i'

.t | --

---i Y

J : L--

LTER

SECTION

PRINTED

4?oK I seo

s* 4'7x 5L

-- _ _--_J

;IRCUIT

BOARD

O43-7?2

ffi

Wlu"nr*",

ffi

ILTER

5loo

POWEROUTPUTSECTION

PRINTEDCIRCUIT

BOARD

O43-7?4

ANNEL

LEFT

i l;^-

r(a

ilrd

Hl[,1fr;

+H(

PUT

IT OF

JT sEcrtot)

RIGHTCHANNEL

POWER

OUTPUTSECTION

PRINTED

CIRCUIT

BOARD043_724

219 Q

2t7

TOP BOTTOM

@@@

2r3 Q

215

220 Q

218

TOP BOTTOM

@@@

Q214 0 216 Q

212

LOCATION

TRANSISTORS

NOTON PRINTEDCIRCUIT

BOARDS

LEFTCHANNEL

POWER

OUTPUT

SECTION

PRINTED

CIRCUIT

BOARD

O43-7?4

--l I

(FROX

LEFT OUTPUT

OFFILTER

SECTIOT)

LEFT ITPU

il5 V

-.o<

YEL

---)r-- ot'1

- ,04

:--\/* o'',

R€D/WHT --l

RIGHTCHANNEL

POWER

OUTPUTSECTION

PRINTED

CIRCUIT

BOARD

O43

- 724

9 azze

IFROMRIGHTOUTPUT

OFFILTER

SECTION)

RIGHT INPUT R202

R214

HEAVYLINE

SHO

TT-l-t

l*telf"''

) |..1"."1 ti

Rl:

ali

to*

R251

l--'Fy'"''"1

I li,nTl I "-.","

L+R OUTPUT(e_*

I 1 I 1 -=€:'

| 3IF | +^^

I ITB I AD2r2

:lt

:'"'.

l:5.0I

FI=4.'.1

l" "'"1 |

I oN

220 5%

LEFT

SPEAKER

? OUTPUT

HEADPHONES

o^__

POWER

OUTPUT

SECT

5lOO t54-244

|lS

PRIMARYSIGNAL PATH

_lI

R39

HEAVY LINE SHOWS

PRIMARYSIGNAL

PATH

VIO/WHT RIGHT OUTPUT

PREAMP.

SECTION

MA5f

OO t54

- 242

--'t-

OFF

c 303

t-:

REDI

oi!

-P

-o

oo5/t400v

III

IAJ

'll-ll-

?t t"l t"

fIl

(FROI LEFT OUTPUT

OFFILTER SECTIO]I'

rEF T

l|7V

70- 200

50- GOCPS

(FROM

RIGHT

OUIPU]

OF FILTER SECTIOII)

RIGHI IIPUT

i{o

-::

.otv

R302

220 5W R303

220 5W R304

t.2K

rw R305

8.2

R301

too 5w

R307 R308

loo 5w 220 5W

E-

€

itr

{

POWER

SUPPLY

SECTIO

MAstOO t54

- 285

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