Sony srf m 30 service manual

Page 1

SERVICE MANUAL

This photo is SRF-MSO.

US Model
Canadian Model

SRF-M3O

US Model

SRF-M45

This photo is SRF-M45.

SPECIFICATIONS

Frequency range
FM: 87.5 - 108MHz
AM: 530 -1.710kHz

Scan slep FM : 0.1MHz
AM: 10kHz
Antennas FM: Headphones cord anlenna
AM: Built-In ierrile bar anlenna
Output Headphones jack (stereo
minijack) load impedance 16
ohms
Power oulpul

20 mW + 20 mW (al 10%
harmonic distortion)

Power requiremenls
3 V DC, two H6 (size AA)
baileries
Battery IIle Approx. 20 hrs. with Sony
SUM-3 (NS) batteries
Dlmensions Awrox. 109.5 xeo.3x33mm (wlh/d)
(43/. x all. x 15/ inches)
excl projectlng pans and
controls
Weight Approx 1 mg (601) incl, batteries.

Aocessorles supplled

SHF-MBO: Stereo headphones (1. vertical
in-lhe-ear type lor the Canadian
model only and stereo dynamic
earphones type lor the us
model only)
Carrying holder (1)

SRF-MdS: Stereo headphones (1, vertical-
in-iheear lypel
Carrying holder (1}

Design and specilrcalions subject lo change
wilhoul nolrce.

FEATURES

- AM/FM stereo 2-band PLL synthesized
receiver

0 Up to 10 stations can be preset in the
desired order.

- MEGA BASS control for powerful bass
sound (SRF-M45 only)

Note on AM tunlng interval

The AM tuning interval differs depending
on areas. The interval of this unit is
factoryAset to lokHZ.

NOTES ON CHIP COMPONENT REPLACEMENT

0 Never reuse a disconnected chip component

I Notice that the minus side of a tantalum capacitor may be
damaged by heat,

AM/FM STEREI] 2 BAND
PLL SYNTHESIZED RECEIVER

SONY;

Page 2

SRF-M30/ M45

SECTION 1
GENERAL

1-1. LOCATION OF CONTROLS

MEGA BASS knob
VOLUME knob (snrwms only)

G (headphones) jack /

POWER switch

TUNE buttons

SENS (sensitivity) (+ or -)

selecto r
(DX/ LOCAL)

\

-1 BAND button
(FM/AM)

KEY PROTECT
0-
switch

\ENTER button
MEMORY PRESET buttons

(+ or -)

1-2. OPERATION OF CONTROLS
To Tune in and Store a Station

Set POWER to ON.
Connect the supplied headphones.
Adjust the volume and select a desired
band
4 Tune in a desired station

+: To tune in a higher trequency.

-: To tune in a lower frequency.
5 Store the station.
While keeping ENTER (1") pressed.
press MEMORY PRESET(®)(+ or -)
to select a preset numberr Hold them
down lot at least two seconds to store
the station,

(AM-A

You will hear a peep and PRESET will
stop flickering to show that the unit has
stored the station,

Up to 10 stations in all for AM and FM
can be stored in the desired order.

SENS (sensitivle selector

While listening, normally set the selector (located on the
left side) to DX. However. i! a very strong station signal
causes noise or it multipath signals are heard while
listening to a FM program, set it to LOCAL. The noise will
be reduced.

(at) MEMORY
PRESET

_2_