Sony SRF-HM55 User Manual

SONY

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FM Stereo/AM PUL Synthesized Headphone fladto

______________

SRF-HM55

Operating Instructions

Before operating the unit, pleaee read this manual thoroughly t
retam it tor future reference.

Sony Corporation C199B PrMod in Japan

Owner’s Record

Tbs modsi and sartal numbsra ars locstsd at ths toft rsar.
Record the serial number in the apace provided below.
Rotor to them whenever you cal upon your Sony deStot rsgardinQ this product.

Modal Na 8RPJ4MSS Sartal No

Features

•FM StaraolAM Р1Д. (Pbaaa Locad Loop) aymhaiiaad baadphona radio

• AdMtobto doubts headbands designad to fit your head

•Tbs AVtS (Automatte VMuma UtiMar Syatam) to alow you to emit the maximum voluma
vMioui dagradtog the sound dually

• Watar^aatoiant tor al>waaihar opanMion

•Capabtoty to praaat up to $ atttiona in aa^ band praaat in toa daairad order

• Light raftoclor to roflact ear Nghta at night tor your aato^

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WARNING

You aro cautionad that any cbangas or modffieationa not axproaaly approved in itoa
manual could void your authority to operate to» aquipmant

INFORMATION

Tbit aquipmant baa bean tasted and tound to comply with the Omits tor a Class В rigiiai
dsviea. pursuant to Fart 1$ of RX Rutoa. Tbaaa Imita are deaignad to provida

геааопаЫа protoction against harmful intertorence in e residential instaltotton. TMe
equifxnertt generates, uses, and can radtota radto Iraquaney energy and. if not inatatfad
and used in accordance with the instructione. may causa harmful intartoranoa to radio
eommunicationa. However, there to no guarantee that mtarfaranc* wW not occur in a
particular instalation. If toto aquipmant does causa harmful intartoranca to radto or
tatovision recaption, wbtob can be dataoninad by turning tba aquipmant off and on. toe
user to encouraged to iiy to corroci the intariaranco by one or more of me toiowing

— RaortoM or ratocato toe raoaMng antenna.
— tnoraaaa the aaparaiion between the aquipmant and racaivar.
—Contract the aquipmant into an outlet on e circuit dittorent from that to which the

raoeivar to oonneetod.

—Consult toe daator or an axpartoncad radtonv tacbnictort for help.

Specifications

Fiequaney range (Cbsnnal Step)

FM47.S-10e MHz (ai MHD
AM:530-1710 KHz (ЮIHD

РМЛ73-108 MHz (006 MHz)*
АМЯЭ1-1710КНг(1КН«

Headphone brpa

Oynsmle

piQiiiar ftritixit

i8mW -t- iemW(al 10%
harmonic dtotorHon)

•Tba fraquaney dtoptoy to ralaad or toworod by etapa of 01 MHl (Exempts: Fraouancy
8006 MHz la dtoplayad ea “883 MHTJ

OaNgn and spaeiflcatlona sublet to change without nottca.

Power requirement

3V0C
two alza AA (R8) oattanaa

Bettary ito

Approx. 33 hours, with Sony

8UM«3 (NS) battanaa

Mesa Approx. 227 g (8 oq

inehidino battartoa

at;.»

•*

Precautions

Do not open the unit Refer servicing to quaiifled penonnei only.
Operate the unit on 3 V DC with two size AA (RQ tMtteries.
When the unit is not to be used tor a long period of time, remove the
batteries to avoid unit damage from battery leakage.
Avoid exposure to temperature extremes, direct sunlight moisture, sand, dust
or mechanical shock. Never leave in a car parked In the sua
Should any liquid or solid object fail into the unit remove the batteries, and
have the unit checked by qualified personnel before operating it any further.
Clean №e unit with a soft cloth dampened with a mild detergent solutloa
Never use abrasive cleansers or chemical solvents, as they may mar the unit
In vehicles or buildings, radio reception may be difficult or noisier. Tty
listening near a window.
If there is lightning when you are using the unit, take off the headphone
receiver immediately.

Do jnpf^ (fmiMpst |n|wfa|tor orH

This product is designed to be water-resistant but should not be immersed in
water or come in continuous contact with water.
Before installing the batteries, be sure to wipe off drops of water on the unit
Never use an electric hair dryer while wearing the headphones.

N<^oiT AH^dhaiuw^ gtep

The AM channel step differs depending on areas. The channel step of this unit
is factory-set to 10 kHz. You can change the channel step (See "Changing AM
channel slep”4

Arse ChannsISlip

North American countries
Other countries

Road Sefely
Oo not use headphones while driving, cycling, or operating any motorized
vehicle. It may create a traffic hazard and is ilfegal In many areas. It can also
be potentially dangerous to play your headsets at high volume while walking,
especially at pedestrian crossings. You should exercise extreme caution or
discontinue use in potentially hazardous situations

Pievsniing hearing damage
Avoid using headphones at high voiume. Hearing experts advise against
continuous loud and extended play. If you experience a ringing In your ears,

reduce volume or discontinue uss

Caring tor ottieis

Keep the volume at a moderate level. This will allow you to hear outside

sounds and to be considerate to the people around you

If you have any questions or problems concerning your unit that are not
covered in this manual, please consult the nearest Sony dealer.

10 kHz

9 kHz

[W*.)4 sre ^

a',mn MA ertr t

Troubleshooting Guide

Trouble Cauaaa

Sound Is not hoard at all.

very weak or kitenupfed

sound, dfetotted sound

when volume is turned up,
or unsatfefedory rscepiloa

PieseHing cannot be made.

TiM piM«t station cannot
ba laoalvad»

No dtoplay avan whan

POWER la oa

• Incorrect polarity of batteries.

• Weak batteries.

• VOL is turned down completely.

• weak batteries.

• Incorrect tuning.

• Weak signal. When in a vehicle or in a
building, listen near a window.

• SENS is set to LOCAL ^ Set it to DX.

• Incorrect presetting. When storing the
station, press ENTER before pressing the
desired preset button.

• Incorrect preset button has been pressed.

• The preset station has been cleared when
replacing batteries.
(Batteries should be replaced within three
minutes.)

• Weak batteries.

Locations of Controls

OFF

1

2

AVLS

QHMdbami

Adjust n to your head.

[DSupport band

(sJavUS lelector

When this selector is set to either position 1 or
2, (around 95 dB, 85 dB respectively) the volume
will be kept at a moderate tevei without
degradation of the sound quality, even if you
attempt to turn the volume up higher.
When this selector is turned off, you will be
able to enjoy the full volume capability of your
radio.

BSattery compaibnanl
[s Driver unKs
(DUgM ralleclor

This reflector reflects car lights at night for your
safty.

{7]fM IlexMs antenna

Use for FM receotion.

(UPrsaat buttons

These buttons can preset up to 5 stations in
each band.

[U Display window

The indicator displays the power remaining in
the batteries, the frequency, the preset number
and the time.

@Band button

Use for changing FM and AM.

QilBnEIVCLOCK button

Use for storing station and setting clock.

QliTUNE(lunfna)fnMESEr(-f and -) buttons

Use tor tuning the frequency and setting time.

ODPOWBUxitton
Q4)fm sens (SensHMIy) DX/LOCAL selector

(is)VDL (Volume) oontml

Turn off the power by pressing the POWER button, if
it is turned on.
While pressing the ENTEWCLOCK button, keep
pressing the POWER button for more than 5 seconds.
The AM tuning interval has been changed. If you
proceed step 2 again, the interval changes again.

H you proceed vrith the steps above, the dock and the preset
memory are canceled, and "AM 12KX)" flashes.

Installing Batteries

WhM to rapfaw* ttw battarlM
When the batteries become weak, sound becomes
weak or the stereo sound becomes moneural. When
the batteries are nin down completely, the power Is
turned olf and the ** ooo ^ in the display window
flashes. When the power is turned on with the
indication flashing, the power is turned olf right awa
While the“ ooo “ starts flashing, replaoe both
batteries with new ones. After the batteries are
replaced, turn the power on again to stop the ilashin
of the indication.

When replacing the batlariee
Replace the batteries within about X seconds. If yoi
do not replace them within 30 seconds, the preset
stations may be canceled, and “AM i2dXT flashes ir
the display window.
For battery life, see “Specifications“.

To avoid damage tram battery leakage and oortosion
Remove the batteries when you do not use the unit

for a long time.

When the batteries are removed for a long «me

Preset stations are canceled and “AM 12:00” is
displayed.
Preset stations again and reset the clock.

The indlcatton of «to power remaining In ttw battery

New battertes

When the power has
been exhausted

--------------------------------------

ooo

► Used batte

oo

o

When you turn on ttie unit, the power remaining In
the battery is displayed for about one second and a

half. The unit displays one of the four indications

depending on the power remaining in ttie battery.

Listening to a Preset Station

1 Press the POWER buttoa

2 Press the desired preset button.

3 Adjust the VOL (volume).

On FM SENS OXILOCAL Salsetor

OX: Normalty set It to this position and the radio operates in stereo mode tor

FM stereo programs and will be automatically switched to mono tor non­stereo programs.

LOCAL: Set it to this position, if a vary strong station signal causes noise or if

muittpeth* oocurs. The reception will be more stable and noise will be
reduoed.

« Multipath, which often occurs In a street with big buildings or in a mountainous

area. Is reflection ol signals that teach the receiver trom structures or hills
considetably later than direct signals. A multipath condition brings about high­frequency noise, distortion, and a poor stereo efiect In FM reception.

Setting the Clock

Set the clock or display time when the radio Is turned off.

Tuning in and Presetting Stations

ILla-ilUI

1 When you insert batteries for the first time, digits flash in the display window.

To stop flashing, press the ENTEFVCLOCK button.

AM 12KX) = midnight

PM 12KJ0 = noon ^ I ,

hr;£.*00d-

/ I \

2 White pressing the ENTEFVCLOCK button, press the TUNE/TtME SET buttons

C'-t-” or to set the clock to the current time. Each time the TUNEniME

SET button is pressed, the digits move forward or back by one.

When you keep the button pressed, the digits ohange rapidly.

Lights while the

3 When you release the ENTEFVCLOCK button, the clock starts to operate and

“: ” of the time Indication flashes.
If you release the ENTEFVCLOCK button simultaneously with the time signal as
it sounds, the clock starts from zero second.

-/3500

5 4

1 Press the POWER buttoa

2 Adjust the VOL (volume).

3 Select a desired band.

M03.O

4 Tune In a desired statkxi

■r: To tune in a higher frequency.
To tune in a lower frequency.

5 Store the statioa

While keeping the ENTEFVCLOCK button pressed, press the desired preeet
number buttoa Then the preset number appears in the display window.

Repeat these steps for each station to be preseL
Up to 5 stations In each band can be preset.
To turn off the neflo^ press the POWER button.

To change the preset station
Preset a new station to a desired preset button; the station previously preset for
that button will be erased.

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m03.0 /