Sony exm 702 service manual

Page 1

EXM-702

. SERVICE MANUAL

US Model
E Model

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION

70 watts per channel minimum continuous average power into 4 ohms,
both channels driven from 20 Hz to 20 kHz with no more than 0.1%
total harmonic distortion per Car Audio Ad Hoc Committee standards.

Other Specifications

Low boost

Power requirements
12 V DC car battery
(negative ground)

Power supply voltage 10.5 - 16 V

Current drain at rated output: 18 A
Remote input: 5 mA

on. (output transformerless) circuit 0 - 10 dB (-10 H2)
Pulse power supply
Inputs RCA pin jacks
Outputs Speaker terminals
Speaker impedance Z - 8 ohms (stereo)
4 - 8 ohms (when used as a
bridging amplifier)

Circuit system

Maximum output 4 ohms Dimensions Approx. 219 x 56 x 212 mm
140 watts per channel (w/h/d) (8 Vs x 2 V: x 8 /s in.)
400 watts (monaural) not incl. projecting parts and
Rated out-puts (supply Voltage at 14.4 V) controls '
70 watts per channel (20 HZ - 20 Mass Approx. 2.1 kgi4lb.10 oz.) not

kHZ, 0.1 '3'}: THD, at 4 ohms)
90 watts per channel (20 Hz - 20
kHz, 0.5 "o THD, at 2 ohms)
Monaural 160 watts (20 Hz - 20
kHz, 0.5 /0 THD, at 4 ohms)
Frequency response 8 Hz - 50 kHz (:1 dB)
Harmonic distortion 0.01 "/0 or less
(at 1kHz, 4 ohms, 16 W)
Input level adjustment range
0.2 -- 2 V

Low»pass filter 80 Hz, ~18 dB/oct

incl. accessories

Supplied accessories Mounting screws (4)

Design and specifications are subject to change without

notice.

STEREO POWER AMPLIFIER

SONY.

Page 2

_
Features

. Maximum power output o! no walls per
ehannt-l (at 4 ohms),

. Direct connection ean be made with mt: speaker
output of your ear audio it it is not equipped
with the line output (High level input
connection)

. Bull n LPF (Lowrpass tilterland low boost
circuit.

. The EXM-m can be used as a monaural
amplifier with a maximum output limo wam.

. lznral modemnnmmln ean be made tor a multi.
upoator iyslem.

. Built in proleclion circuit.

. Pulse power supply tor stable and regulated
output power.

u Mu pm auppty
Tim ttrtrt has r built-m MW regulator utuetr mums the
putter tupplltd by the DC l2 Veer battery into high sprd
pulses usinx r sentienntturlar surlrrlr, hexpttlres m
slfppnl up by me builhm pnlsnr-m/tmna ant aeparrterl
into both poeilnernu lkxnllwptun supplies ire/ore hem,
Mlflld itttodrrrrt nimul min ntis tr to regular
[humming mange/rum lhl err batlery. nits ltgltl waglu
power 314;:ny system pratudes r htxhlytfinml palm
sryply uullt r Iorrt tntprdamautpttt

SECTION 1
GENERAL

-
Caution

. Belore making any connecfitms, discount! the
ground terminal oi the car battery to avoid short
circuils.

. Be sure to use speakzrs with an adequate power
rating. ll you use small eaparlty speakelst Hwy
may be damaged.

. Do not conned the (9 terminal or thospaalter
system to the earrhassit, and do not eonnuet the
9 terminal ol the right speaker with that or the
lelt sprain-r

. lnstall the lnpul and ou|pul cords away lrom the»
power supply load as running thorn close
hlgclbtcrun gmrale game» tntcrtereneu mm.

. This unit is a high powered ampltlier nit-relate,

may not perlorm to its lull potential it used

.tti th- speaker eords supplied With the» can

. it }our ear is equipped with a computer system
tor navigation or some other purpose, Do not to
remort- the ground wire trtrtn the carbatten lt
you disconneet |hc Wlle, the (mnpulur mentori-
may he erased. To amid short eireuits when
making eonneetions, diaennneet [M e l: v
power suppl rad until all the other leads have
been competed.

Make the terminal
connections as illustrated below.

I
%

Wlmlytlll invite. 'Ilfifh'fl'.bff17(fl4'IIIIIIDIW'y kw ruler.
(on'ur' osdtrmg somlydamxrlhe ml.

' 1hr torque nrltte should (id's! than l N-nt

tlswl our

car audio

Power Connection Leads (not supplied)

Fuse (:5 A)

toarneulwirttotmeur
-E

0 e

. u vat battery

Mom on ttteltower tuoply

. chit-int 1hr .r: v purer supply kmlanlyanr til the other
lttltk lure btm rattan-tea

. to sun to eonneet ttte ground lead a! are «all
reeuretytoa metalpornratrrt. rat. a loore
eonneetiort may tarts. a mattunerlon o/ ttre
amplifier.

. at run ta «meet the mtreanrral lrnllvflltt' err (ll-1m lo
the remotr tamtml.

. UK kht MW Sllnlly lad :4th a [I451 uttretred l2; rtt

. plrrt nit-lust tr. the perm supply was elotets Mafia lo
the ear balmy.

. During r/ullptrrer operatron. r nmml ohm," than 15 rt
realm lhnughlhrxzfilml thereto", nah utretltrt lllr
Ira: lobtrarlmdrd lotlree u you GNDtrmttn to/
tlrtt urnt rcspvmrdy mm! he larger nun lZ-Glugr
um uni. the 51mm»! area more than 3 non-z

2-Speaker Syslem

Car audio

mom

llghl speaker

(no... m) h

tett sneaker
ltnln. ml

This section is extracted from
instruction manual.

As a Monaural Ampli

car audio

one our

utt that-net

ltett wait-r (min on)

Note
Maire aure that the line output troru the cur ltudm ts
connected mlmjuknwhd'l tmrtorou the unit.

As the Monaural Amplifier for a Subwoofer

or audio

LIME our

subwaoter (min. «1)

Mote
ll wit nut. to tree t tubunoter .r . manaurst «przkr.
ml the tpeuerar riluuntetl ahote The outrrut
yak to the wlwtoolu lull be the min-nun otthe
truth outtt Ind len orupot signals.

#
Level Adlustment
Control

The input level can be odiuswd with this comm]
when using attureu cqulpnwn' otother
manutarturors Turn it to MAX when the output
level otthe ear audio seems low.

_
LOW BOOST Level
Control

rut-n thts control to boost the lrequmies around
to H1 at the maximum oi lodla. the low boost
response curve is shown below.