Sony SRF-M90 User Manual

 

Thank you for choosing the Sony radio! It will give
you many hours of reliable service and listening
pleasure.
Before operating the radio, please read these
instructions thoroughly and retain them for future
reference.

• Quartz-controlled PLL(Phase Locked Loop)

synthesizer system using a microcomputer for
easy pinpoint tuning.

• Up to 7 stations in FM and 7 stations in AM

can be preset.

• You can enjoy a powerful bass sound using the

“MEGA BASS” system.

• Power goes off automatically in about 90

minutes.

Notes on AM Channel Step
The AM channel step differs depending on areas.
The channel step of this unit is factory-set to
10 kHz (models for North and South America)/
9 kHz (models for other countries).

North and South

10 kHz

American countries
Other countries

 9 kHz

(See Fig. A)

Open the lid at the rear of the radio.

Install two R03 (size AAA) batteries with
correct polarity.

Close the lid.

Battery Life
Using Sony R03 (AAA) batteries
FM

Approx. 13 hours

AM

Approx. 22 hours

Knowing When to Replace the Batteries
• When the batteries become weak, the sound

becomes weak and distorted, and “

i” will

appear or flash in the display.
Replace the batteries with new ones.

• Before replacing the batteries, make sure that

the radio is turned off.  Replace the batteries
within 30 seconds. Otherwise, the clock setting
and preset stations could be erased. In this case,
set the clock and preset the stations again.

• After replacing the batteries, to clear “

i” press

POWER (AUTO OFF).

Notes on Batteries
• Insert the batteries with correct polarity.
• Do not charge the dry batteries.
• Do not use different types of batteries at the

same time.

• When you replace the batteries, replace both

with new ones.

• When the unit is not being used for a long

period of time, remove the batteries to avoid
damage from battery leakage and corrosion.

• If a battery leakage occurs, wipe the battery

compartment with a soft cloth before inserting
new ones.

The time display of this clock is a 12-hour
system.
The display will flash “AM 12:00” when the
batteries are first installed.
Press ENTER/CLOCK to stop flashing of the
display .

Press POWER (AUTO OFF) to turn off
the power.

While holding down ENTER/CLOCK,
press TUNE/TIME SET + or – to set the
clock to the current time.

Each time you press the button, the digits move
forward or backward by one.
When you keep the button pressed, the
digits change rapidly.

When you release ENTER/CLOCK, the
clock starts operating, and “:” starts
flashing.

• To set the current time exactly to the second,

release ENTER/CLOCK at step 3 with the
telephone time signal.

• 12-hour system : “AM 12:00”= midnight ,

“PM 12:00”= noon.

The channel step of this unit is factory-set to
9 kHz or 10 kHz to match the frequency allocation
system of the country as listed.
When needed, change the channel step before
listening to the radio.

North and South

10 kHz

American countries
Other countries

 9 kHz

Press POWER (AUTO OFF) to turn off
the power.

While holding down ENTER/CLOCK,
keep pressing POWER (AUTO OFF) for
more than 5 seconds.

You can hear the confirmation beep and the
channel step (9 kHz or 10 kHz) will flash in the
display for 3 seconds.
If you proceed to step 2 again, the channel step
changes back to the previous channel step.

Note
• When the AM channel step is changed, the

preset stations will be erased, and the  clock
time will be kept.

Connect the headphones to 

2 .

Press POWER (AUTO OFF).

Press BAND to select the band.

Press TUNE/TIME SET + or – to tune in a
station.

Adjust VOL (volume).

• To turn off the radio, press POWER (AUTO

OFF).

• The radio will be shut off automatically in about

90 minutes to prevent unnecessary wear of the
batteries. To listen to the radio continuously,
press the POWER (AUTO OFF) again.

• To improve radio reception

FM: Extend the headphones cord which

functions as the FM antenna.

AM: Rotate the unit horizontally for optimum

reception. A ferrite bar antenna is built
in the unit.

When listening to stereo program, normally set the
FM selector (at the rear of the unit) to the ST
position. If the stereo program is too weak and
noisy, set the FM selector to the MONO position.
(When the selector is set to the MONO position, the
sound will become monaural.)

Switch MEGA BASS to ON. The “MEGA BASS”
system produces a powerful bass.
When the sound become distorted, switch MEGA
BASS to OFF.

You can preset up to 7 stations in FM, 3 stations in
TV (TV 1-3, channels is use in Japan only) and 7
stations in AM, 17 stations altogether. Easily tuned
by choosing a preset number you want to listen to.

Tune in a station to preset. (See
“Operating the Radio”)

Hold down ENTER/CLOCK until the
preset number flashes in the display.

Press the MEMORY PRESET button
repeatedly to choose the preset number.

Press ENTER/CLOCK.

You can hear the confirmation beep and preset
number appears in the display.

Example: To set FM 90 MHz in preset
button 2 for FM.

To preset another station, repeat these
steps.

• To change the preset station, preset a new

station number. The previous station will be
cancelled.

Press POWER (AUTO OFF).

Select the band with BAND.

Press MEMORY PRESET button
repeatedly to choose the preset stations.

Adjust VOL (volume).

• Operate the unit only on 3 V DC with two R03

(size AAA) batteries.

• Avoid exposure to temperature extremes, direct

sunlight, moisture, sand, dust or mechanical
shock. Never leave in a car parked in the sun.

• Should anything fall into the unit, remove the

batteries, and have the unit checked by qualified
personnel before operating it any further.

• To clean the casing, use a soft cloth dampened

with a mild detergent solution.

• In vehicles or buildings, radio reception may be

difficult of noisy. Try listening near a window.

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

Preventing hearing damage
Avoid using headphones at high volume.
Hearing experts advise against continuous, loud
and extended play. If you experience a ringing in
your ears, reduce volume or discontinue use.

Caring for others
Keep the volume at a moderate level. This will
allow you to hear outside sounds and to be
considerate to people around you.

If there is lightning when you are using the unit,
take off the headphones immediately.

If you have any questions or problems concerning
your unit, please consult your nearest Sony dealer.

12-hour system

FM (TV1–3)* 76 - 108 MHz

0.1 MHz

AM

531 -1.710 kHz

  9 kHz

AM

530 -1.710 kHz

10 kHz

*

Received inside Japan only.

FM

76 - 108 MHz

0.05 MHz**

AM

531 -1.710 kHz

  9 kHz

AM

530 -1.710 kHz

10 kHz

** The frequency display is raised or lowered by a

step of 0.1 MHz. (Example: Frequency 88.00
and 88.05 MHz is displayed as “ 88.0 MHz”.)

2 (headphones) jack (stereo minijack)

4 mW + 4 mW (headphones)
(at 10% harmonic distortion)

3 V DC, two R03 (size AAA) batteries

90 minutes

Approx.  45 x 88 x 19.8 mm

13

16

1

2

25

32

(w/h/d) (1 

   

⁄

 

 

 ×

 3 

 

⁄ 

 

×

 

 

⁄

   

 in) incl.

projecting parts and controls

Approx. 74.2 g (2.6 oz) incl. batteries and
headphone

Stereo headphones (1)
Batteries (2)

Design and specifications are subject to change
without notice.

Should any problem persist after you have made
the following checks, consult your nearest Sony
dealer.

Very weak or interrupted sound, or
unsatisfactory reception
• Weak batteries
• In a vehicle or in a building, listen near a

window.

Display is dim, or no indication is displayed.
• Weak batteries.
• The unit is being used in extremely high or low

temperatures or in a place with excessive
moisture.

The station cannot be received when a
MEMORY PRESET button is pressed.
• Chosen the wrong preset number.
• The memory of the station has been erased,

preset the station again.

i” flashes in the

display.
• Weak batteries.

 

A

RO3 (size AAA) ✕ 2

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,

yy

yyyy

yyy

y

ST

ON

MONO

OFF

MEGA
BASS

FM

2