Sony SRF S54, SRF S56 Service Manual
SRF-S54/S56
SERVICE MANUAL
Ver 1.0 2002.10
Photo: SRF-S56
SPECIFICATIONS
Frequency range
87.5 - 108 MHz
Output
i (stereo earphones) jack (ø 3.5 mm stereo minijack) load impedance
16 1
Power output
4.5 mW + 4.5 mW (at 10% hamonic distortion)
Power requirements
1.5 V DC, one R03 (size AAA) battery
Dimensions
Approx. 33.7 × 75.3 × 16 mm (w/h/d) (Approx. 1
not incl. projecting parts and controls
Approx. 34.9 × 76.3 × 20 mm (w/h/d) (Approx. 1
inches) incl. projecting parts and controls
Mass
Approx. 46.6 g (1.7 oz
Supplied accessory
Stereo earphones (1)
Design and specifications are subject to change without notice.
) incl. a battery and stereo earphones
3
/8 × 3 × 5/8 inches)
7
/16 × 3 1/8 × 13/
16
E Model
Chinese Model
9-874-198-01 Sony Corporation
2002J0500-1 Personal Audio Company
C 2002.10 Published by Sony Engineering Corporation
FM STEREO RADIO
SRF-S54/S56
TABLE OF CONTENTS
1. GENERAL .................................................................. 3
2. DISASSEMBLY
2-1. Disassembly Flow ........................................................... 4
2-2. Cabinet (Rear) Block, Knob (ST)................................... 4
2-3. MAIN Board ................................................................... 5
3. ASSEMBLY
3-1. How to Install Gear (Tuning Capacitor)......................... 6
4. ELECTRICAL ADJUSTMENTS........................ 7
5. DIAGRAMS
5-1. Block Diagram ............................................................... 8
5-2. Note for Printed Wiring Board and
Schematic Diagram ......................................................... 9
5-3. Printed Wiring Board ..................................................... 10
5-4. Schematic Diagram ........................................................ 11
6. EXPLODED VIEWS............................................... 12
7. ELECTRICAL PARTS LIST .............................. 12
Notes on chip component replacement
•Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
2
SECTION 1
GENERAL
SRF-S54/S56
This section is extracted from
instruction manual.
i (stereo earphones) jack
Prise i (écouteurs stéréo)
Stereo-Ohrhörerbuchse i
Toma i (auriculares estéreo)
i (stereo oortelefoon) aansluiting
OFF/ON/
MEGABASS
TUNE
Dial scale
Voyant de
syntonisation
Frequenzanzeige
Dial
Afstemschaal
A
Rear
Arrière
Rückseite
Posterior
Achter
Clip*
Pince*
Klammer*
Gancho*
Insert the # side of the battery first.
Introduisez d’abord le pôle négatif # de la pile.
Legen Sie die Batterie mit dem Minuspol # zuerst ein.
Inserte el polo negativo de la pila primero.
Breng de # kant van de batterij eerst in.
*Press the top of the clip to open.
*Appuyez sur le haut de la pince pour ouvrir.
*Drücken Sie zum Öffnen oben auf die Klammer.
*Presione la parte superior del gancho para abrirlo.
*Druk op de bovenkant van de clip om deze te openen.
R03 (size AAA) x 1
R03 (format AAA) x 1
R03 (Größe AAA) x 1
R03 (tamaño AAA) x 1
R03 (AAA) x 1
VOLUME
MONO/ST
B
Installing the Battery
(See Fig. A)
Open the battery compartment lid at the rear of the radio.
1
2 Insert one R03 (size AAA) battery (not supplied) with the 3
and # marks aligned correctly.
3 Close the battery compartment lid.
Battery life (approx. hours) (JEITA*)
Using Sony alkaline LR03 (size AAA) battery 44
Using Sony R03 (size AAA) battery 19
*Measured by JEITA (Japan Electronics and Information Technology
Industries Association) standards. The actual battery life may vary
depending on the circumstance of the unit.
When to replace the battery
Replace the battery when the sound becomes weak or distorted. Remove
the old battery and insert a new one.
Notes on battery
• Do not charge the dry battery.
• Do not carry the dry battery with coins or other metallic objects. It can
generate heat if the positive and negative terminals of the battery are
accidentally contacted by a metallic object.
• When you are not going to use the unit for a long time, remove the
battery to avoid damage from battery leakage and corrosion.
If the battery compaertment lid comes off
(See Fig. B)
The battery compartment lid is designed to come off when opened with
excessive force. To put it back on, see the illustration.
1 Insert the right hook of the lid into the right hole in the unit.
2 Hang the left hook on the left part of the compartment where the lid
fits.
3 Slide the left hook toward the left hole in the unit.
Operating the Radio
1 Connect the supplied stereo earphones to i (stereo
earphones) jack.
2 Set OFF/ON/MEGABASS to ON to turn on the radio.
3 Turn TUNE to tune in to a station.
4 Adjust VOLUME.
To turn off the radio
Set OFF/ON/MEGABASS to OFF.
To Improve the Reception (See Fig. C)
Extend the stereo earphones cord which functions as an FM antenna.
When listening to the stereo reception, normally set MONO/ST to ST
(stereo)*. If the stereo reception is poor, set MONO/ST to MONO.
Although the sound will not be heard in stereo, noise will be reduced.
*You will hear the sound in stereo only when the program of the station
that you are tuned into is in stereo.
C
To Enjoy Powerful Bass Sound
Set OFF/ON/MEGABASS to MEGABASS to emphasize bass sound.
3
SRF-S54/S56
• This set can be disassembled in the order shown below.
2-1. DISASSEMBLY FLOW
SECTION 2
DISASSEMBLY
SET
2-2. CABINET (REAR) BLOCK,
KNOB (ST)
(Page 4)
2-3. MAIN BOARD
(Page 5)
Note: Follow the disassembly procedure in the numerical order given.
2-2. CABINET (REAR) BLOCK, KNOB (ST)
1
two screws
×
8)
(B1.7
4
claw
5
cabinet (rear) block
3
two claws
6
knob (ST)
knob (ST)
slide switch (S2)
2
claw
Note: When installing knob (ST),
connect with slide switch
(STEREO/MONO) (S2).
4
2-3. MAIN BOARD
w
SRF-S54/S56
main board
13
shaft
(tuning capacitor)
hole
(gear (tuning capacitor))
2
cla
5
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