Sony srf m 45 service manual
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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-MBO/ M45
SECTION 1
GENERAL
1-1. LOCATION OF CONTROLS
MEGA BASS knob
VOLUME knob (SRF-M45 only)
0 (headphones) jack /
POWER switch
TUNE buttons
+ _
SENS (sensitivity) ( 0" )
selector
(x/CAD BAND button
(FM/AM)
KEY PROTECT ENTER button
Owl
switch
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 lrequency.
-: To tune in a lower frequency.
5 Store the station
(AM-A
While keeping ENTER (1) pressed.
press MEMORY PRESETQJ) or -)
to select a preset number Hold them
down lor at least two seconds to store
the station,
You will hear a peep and PRESET will
stop flickering to show that the unit has
slored the station,
Up to 10 stations in all lor AM and FM
can be stored in the desired order.
SENS (sensitivity) selector
While listening. normally set the selector (located on the n'tt
left side) to DX. However. it a very strong station signal ~ 3 3'5 "
causes noise or ii multipath signals are heard while
listening to a FM program, set it to LOCAL. The noise will
be reduced. mm
'- 39.3 :
(i) MEMORY
, (1) ENiEl-l
PRESET
_2__