McIntosh MX 118 Service Manual

Page 1

rnEBLE VOLUME

mfiflnioeh

'" MX1 15 AN TUNER CONTROL CENTER
rum none 0
axe- l, z-TVMDED elm - - mu
0 ° ===== IYEIED- 0 O -- Imam
Ont-I: «~th mm
was: LOUDNEss+ mums
BASS
D i r. u
.u
o a 5 3 o
u .4»:
mm FLAI ml
. rAPE/vcnm 2 gamma 909v»: Emu um was! v Me A women

NEADFHONES

©

CONTENTS
Perlormance Specifications 3-4 G) Loudness/Balance 34-35
Notes 4 ® Tone/Headphone 36-38
Rear Panel 5 (9 Keyboard 39-40
Section Locations 5 0) Display 41-44
Block Diagram 6-8 6) Mode/Power Supply 4546
Front Panel & Trim Parts List 8 ® Backup Power Supply 47

8-12
13-18

47-51
52-57

Interconnection Diagram
Input Switching

(9» Tuner Controller
® Tuner

Control (Dolby Function) 19-28 AM/FM Alignment Procedure 56-57
4) Video Switching 58-60
Control (Remote Function) 29-33 ® Multi-Floom Controller 61-62

Mode Rotary Switch
Input Rotary Switch

24-28
29-33

Repacking Instmctions 63

§
® Control (Surround Function) 24-28
<>
{3*
®

Sewvice Manual

McIntoshLaborauorvylr-ict EChsmbers Streets. Einghamcon.NewYork13808 Prinbedin U.S.A. Part No.040309

Page 2

Performance Specificatians

91119101
W W
V MONO and mum moons
LEFT, CENTER and RIGHT FRONT manners +0.
W from 20H: to £0,000»;

HALL mom

LEFT. CENTER and mm FRONT mamas. +0.
0.5118 from 209-12 to 20.000512.

LEFT and RIGHT suanouuo omen. +0.
«303 Mm SOB: to 700051;.

CHEM {DGLBY 03049010) MOM

LEFT CENTER and mom FRONT mam. safédfl
{mm 3051: to 16. 000512.

LEFT and H1581 SUWND shaman. $103 from
50112 to 63001-52 003 st moors

ALL MODES

suswoeFm shamans 50w mass. 10H: is 15 WW
Imam m 8031:: with a 2403 par octave mums.
wah the rear pane! NEH PASS witch 0N and the
SLEBWDOF Switch ON the LEFT CENTER and EGHT
FROM chomois iqude high pass was with a 1108
not name runoff and a comer mummy at 00H;

RATED OUTPUT
ZWBVMLEFTW m WGHT FRGNT Lm
W WENT W0 and SWWOQFER
mam.

"*«~/ 2.5V 81: LET and HIGH? mom 38W.

GUT?! WEE
Lass than 200 ohms at an outputs

WNW VOLTAGE OWEN"
av EMS at a3! mots.

WIN. mama 9WD!

MGM). 51mm and HALL MODES

LEFT. CENTER am! mm FRONT 0W3, 13400596
from 20112 to 20.000sz

(HALL MODE. 055M [33 and FGGHT SURROUND
3W5. 0.1% from 50512 to 3W2.

Guam gums? mums; MODE

LEFT. CENTER and RIGHT FRQNT sham 0.05%
from 00H: to 18.000512.

LEFT and NGHT SURROUND ohmmais. 0.1% from
501-12 to 1000112.

SENSWMTY
HIGH LEVEL; my fat 2.5V 0mm (EOmVIHF).
DDLRY LEVR: 200m? 5mm.

WAL TO 00155 RATIO. A~WEIGHTED

«we, steam and HALL mamas

EFT, CENTER and NGHT FRQNT sham. 20011
LEVEL: 9003 031mm med output (8603 ms)

CWEMA {DOLBV P0010010} MGDE
All outputs greater than 70dB Mow referents; loud.

KW MT 316%
HIGH LEVEL: 6V MUN!) and STEREO, 2.1V HALL.
STADIUM and CINEMA (WHY moms).

INPUT MWCE
HIGH LEVEL: Quanta than 22K ohms.

VOLTAGE GAIN
Haiti LEVEL to TAPE: (MB.
WGH LEVEL in MN: 1%.

TOME comm
BASS anti mEELE varésme 1208 boost m 12$ out.

(FM mama;
USEABLE SENSLYMTY
11.2508 whisk is 11.01 Harm 25 am

5MB name WW?
Mom: 1508!: Which is 1.650? across 25 ohms.
SW: 370% which is 20W mass 15 m.

WILL To 0535 RATIO
Mono: 8003.
Stereo: 2503.

FREDMEMCI' mmNSE
Mono: +0, MS. 20H! to 15.0mm.
8mm: +9, -1dB. 201-1200 10000512.

mmumc DWM

Mom: 0.08% at 30051:.
013831 at 500%.
0.12% at 10.0mm.

55mm: 0.03% at 1mm.
0.03% as! 3000512.
0.12% at 10.000013.

4MERMQDULATION BISTDRTM
Mom: 0.08%
812030: 0. 3 2%

CNTURE Mflb
LEdB.

ALTERNATE CHANNEL WWY
701113.

SPURVOUS KESPONSE
1W8.

WAGE RESPGNSE
8003.

IiF INTERMGDULATLON
6508.

MEMO WRATTDN
45233 at 100112.
51308 at 1000112.
35133 at 16.000312.

lover!

Mommas Wm contktued...

36A REJECHON
GEUB.

90M SEEM
SENSITIVITY
20W Extsmsl mm Input, 60 ohm generates.

SIGNAL TO [330595
was at 30% momma».
8005 31 100% modulation.

flAWMK: summon
0.5% maximum at 50% rmdmmim.

FHEBUENGY BEWfiE
50H: to 8000351: N533

AMEN? CHANNEL mmwrrv
45:13 minimum IHF.

IMAGE REA/ECHO
7568 mimmmn Mm 540k!!! to 19000;;

Notes

1. mmzmwonmmmwmm
pmwmtpsm

2. (Mass WW1» noted ail witness Wasted on
the mm m measured undo: this mama
mndifims:

a. N: m at 120 wits. $010M.

h. Allyoflmesm saosmwemmm
A max irnpadancs :10 mamhm! 0
must no used.

3. um othsmiss specified:
a mm mm am 311 ohms
b Capacitor valuas era in mionfiam {HF}
4:. Muomrkuesmammam M5

4,, Thsvaltages Wostabmtam 1:in
that are assumed with :3 400mm tkHz Wat
summed to both W8 atthaAUXAV "W

Front panel sonnets are sat at:
BALANCE .......... . CENTS?! uETENT
mm ........ CENTER DETENT
WPUTSWONS) LVZAUX
mum . . ................ FLAT
M005 ........ . ...... STEM)
Pom ....................... 0
VOLUME ..... . . ........ CLOCKWISE
MONO ............ . .......... OFF
Rom not nomads are set at: ,
5Y5 TEN! ....... CENTER DETENW
HIGH PASS mums ............. OFF
WE. ........... . . ...... 8
SYSTHI CAUBBATE .......... MAN
{ENTER SPEAKER . . .......... MflGE
CENTER Flu. . ......... . . . ...... 0N
SWGF ........... . . ..... an

IF REJECTM
6865 mininmm.

£1157 POWER AND mmmu
An POW-EH W3

2 swfimiasd for W rigs

1 unswtmhod

POW 3931;393:3113
1213 volts 89.50342. 35 watts.

$125

From W 1M)? 5mm (Jami Wide. Beam
mom: (13.7mm 511931.me behind from pans!
including 0mm 0): combats, 17 W2 mm
(44.5%}. Knob (:1an required in from of the
mom ' paw is 3%! Hashes {1 00m!

mm
22 pounds 1105(9) net. 37 pounds (18.8!) inshm
tartan.

'5. OnPCdemaMnas.SqmrsM
Moms:
3. WWs-Posifive
h. Diodo«cubod' 'e
c. cam-m1

a. Asymm! numbermdosefi mamwam
mntmtumdmsmmfimwfits

7. Unions otherwm W. a schemfic woman
drawnwtmmdmwssussdinsomeesm
was.

8. mm: 1%:
Pass W with the symbol have critical
5:me Use ONLY replacemm saris
Wham fly the msnufanhzrer

0mm? SURROUND. PRO LOGIC and magnum
Symbni are warm WWII-:3 03 W
manning Laboratory

ROME mx AW) is rants-torso trodematk of
Lmasfilm Ltd.

Rear Panel

.m p

ssfiEos -
H®@@I®W

F

m. n En.
Mi 0 $§§$§§

W-Mml

Eu
055

f:fi;m:sg., oossssfifimg

fl" Var ! *nfim ,

(0" a 0 Esfim Efi-fl no.
Futflwvisw

Sectinn Locations

gum W mum W
mm" mm '1 '3 mm
' 13 E

\\\ 0" a. %

a/§% WY

swam WWW

Fig. Zvaiswvvimoavorromd

_ 8

Page 3

ANALOG AND WE SUPPLY TUNER AND TUNER cam

.V
mm
I GAL
WW
w
mm
mm mm
m m ,
M £1 fin I m m 1::me
m Mam mummm
? , , ,
mx E: m M
cu! A: W W
I m m w mm mm and m
, PARTS 11$? ¢
M MW
m 01 am up Pml m
cams Butm Panel MI
mama and cm
_ . mm Iawawaua mam- mm comm
"mum , I . wk m3? '9..on Knob. Rut
w w 0 w W mg wusmmum Knob
, , , '7' s x m finch, W
m iF memw 3: m ' 3?; m .* m m , a -0 wig was (mg. Knob
W N - " M K m m a , W 20:35:? may m WW, aw pea.
W
use
4%!
mm \y
AOGESfiQRY OONTRGL LGGIC @wflm
M um-D rang
WW , WV Mn Wm?
°" m " W '-------* xmflm
gum? ...... mm W Imam? NNECTIIIM
, m PARTS LIST
m
m, 1
, ,
as: new (In. 9041» a may. ULIQSA
VOLUMEIOUTPUT SECTION 4 W ml VIDEO SWITCHING W m
m m as: amass LED, aw, mamas
m W mm % n? 1 m9 068130 ma. $417373
"- r I I l E £1 1222?: m mum
* ms * 5 m , , , {m m '
a» a m. a-C-I m" ~ {m It: w am
' l l » 1 mm 217437 xm mmm Mate
, W a m. , 3 in A , gm ,
A? $33; , m My 335mg? m --'| 3;: * g w W 1"! $23? Paw
W & I g Wt , , Rm
4 3; mm mu-W I mm 33,? I '1 M m m #32 >
I I m m V
m .l m a W W
m; M m U ml
.--- 51m
Wm '* m *3: " m