Sony xm 275 service manual

Page 1

XM-275

SERVICE MANUAL

U8 Model

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS

POWER OUTPUT AND TOTAL HARMONIC DISTORTION

75 watts per channel minimum continuous average power into 4 ohms,
both channels driven from 20 Hz to 20 kHz with no more than 0.04%
total harmonic distortion per Car Audio Ad Hoc Committee standards.

Other Specifications

Circuit system OTL (output transformerless) Low-pass filter 80 Hz, -18 dB/oct
circuit Low boost O - 10 dB (40 Hz)
Pulse power supply Power requirements
Inputs RCA pin jacks 12 V DC car battery
Outputs Speaker terminals (negative ground)
Speaker impedance 2 - 8 ohms (stereo) Power supply voltage 10.5 - 16 V
4 8 ohms (when used as a Current drain at rated output: 20 A
bridging amplifier) Remote input: 5 mA
Maximum output <1 ohms Dimensions Approx. 219 x 56 x 212 mm
150 watts per channel lW/h/d) (3 /. x 2 '/s X 8 /:« in.)
450 watts (monaural) not incl, projecting parts and
Rated outputs (supply Voltage at 14.4 V) controls
75 watts per channel (20 Hz ~ 20 Mass Approx. 2.1 kg (<1 lb. 10 oz.) not
kHz, 0.04 2» THD, at 4 ohms) incl. accessories
100 watts per channel (:0 Hz - 20 Supplied accessories Mounting screws (4)
kHz, 0.1 THD, at 2 ohms) Optional accessories Connecting cord for power
Monaural: 200 watts (20 HZ - 20 amplifier RC-46
kHz, 0.1 "a. THD, at <1 ohms) RCA pin cord RC-bl (2 m)
Frequency response 5 Hz - 100 kHz ( N; dB) RCA pin curd R065 (5 m)

Harmonic distortion 0.005 32, or less
(at 1kHz, 4 ohms, 16 W)

Input leVel adjustment range Design and specifications are subject to change without
0.2 - Z V notice.

STEREO POWER AMPLIFIER
ONY®

Page 2

-
Features

. Maximum pawn output or mamas per
channel {at 4 ohms»

. wade dymmi: rang: and low drslomou (less
man 0 cos n.

. Bulk m LPF flaw-p156 filler) And low boos!
(IKIII.

. sum in prmmion circuit.

. Pulse power supply" (or slahk 1nd regulaled
outpul power.

- Ms. mm
The um! m . bum-5.. pm "3.4m" um mum) HM
pm Me; by m.- vc l2 Vt." lutwy "u.- my. Wu
pulses mg u (Madurai mm. nosey-Ago m
«(1:li up by lht bullI-lu pulx "whom And maid
mill Mk lawn Wm. m" supplies 1.7m turq-
tumult-l ml.) lured rum] Axum "a: ll l. Iqaluit
flurlmlmx lullaxcfimu lllr m lumry Thu lulu »
palm wyply wilt"! Wm o wry r/jiaml 1w ,,
slowly will . lua- rmmlour may.

m

SECTION 1
GENERAL

_
Caution

. More maklng any cannearrm dimmed the
ground terminal or rho ctr balmy lo Avoid short
chums.

. Be sun lo use speakm will. an adequate power
Mung ll you use small upacily speakers, lhey
may be damaged

. Do not connect me e nominal or the spcnker
sysltm to rlre cor chassis, and do "0le me
9 rerm'mal of m righl speakn with our M [he
loll spcflker,

~ lnslall the input and oulpur cords away [mm the
power supply lead as running them close
Whey un genomic some lnlrflcrence noise.

- This unil is: lug,» powered amplifier. Dix-refine,
. may not porlorm lo ils lull polemlnl ll used
mm llu speaker mtds supplied wilh rho can

~ your car Is equipped wllh a computer system
for navlgallnn or some lube! purpose, Do no! lo
remove me ground wire mm are tar barrow, If
you dimnml [he wim, lhl: zompum mmry
may be erased. To avoid short circuus when
making zonnedims, disconnm mo 2 v
power supply load umll all the orher lends have
boon cnnneclcd.

Make the terminal
connections as illustrated below.

More
Mm. you 1.3m rm mu Iv rm": um All upplv 7m ml.
Iovqur' .5 4m .14) runny damngr nu stmo

' rlrr lnrqwxvlur shouldbrless than lN-m

Power Connection Leads (not supplied)

ro. mu yolnl ol 9.. ur
E

um our 0 Q
" "° mo as A)
. u v or bonny
New on the power W'y

. mm: lhr ell v Mm ulnar, lmrlanly one: all NM our"

full: lrm hurl mmm m1

. Be um ro roam rne ground lend lame unit
"(only ro o meta/point of the car. A loose
eomealon may roar. : malhndron of the
mower,

. lu «m m mum: lhrmlmlrrvullml Innis/[hr «mull-l.)

r».- mum lrnmlML

. 1154-th Wm wwllulmrl wrllln/usr'rllluhafllfl A)

- l'lnrr lllrfllsl m m. powflsupplylmdasduwn! pmslbll lrl
rlrr Mr balmy.

. um. x/lrIl-ponvv «manor, 1 (mm rgrmm um. 25 A
mll n... Illrrlllgll the (yKIrm Tllrnjrlve, makr- um um» lh(
loads r" n. (ommmi n- lllr o 11 v and own Irrman: of
mu uml vfiyrwlx'rly mus] hr- Yaqullmll 72-61"er rm;-
III or with Ill! serllmml and um" um I m»-

2-Speaker System

cor wall:

UNE our

tum speaker
(mln. m)

1m weaker
(min. my

This section is extracted from

instruction manual.

As a Monaural Amplifier

(a ladle

tms our

Len (ll-noel

la

{W

llgM speaker lawn. «in

lull-Y

an weal... (run um

um
M-Ilrr um lh-l lhr lmr Oulyml [w are on Mr. N
mmmlel m Mr M mlkd 1 1MON07" ml Illr urur.

As the Monaural Amplifier for a Subwoofer

55;
Car :udlo w
our our

Subwoofev (min. «ll

Note
l/ w wvl'xh r.. w n eulwfrr as r mammal Wm,
mum rhr 9mm "Instr-led ohm-r. The output
signals l" Illr snlmm/rr lull] be the mmbmnliwr u/llw
no». rush! ml It]! only"! 5W5,

_
Level Adjustment
Control

The inpul level can be adjusrea wnh Ihis control
when thing «mm cqmprncnl 010er
llunnfuluwm Tum ll r0 MAX when mo oulpul
level n! «he ear audio seems low,

LOW BOOST Level
Control

Tum mo- mmml lo mm .lre frequencies around
40 H: u llu- nmxlnmm of m M3 '1» low boost
n-spunw cum» xs ,lurwn below.

maniac! ..