Sony SRF-18 Service Manual ▷ View online
SERVICE MANUAL
Sony Corporation
Published by Sony Techno Create Corporation
SRF-18
SPECIFICATIONS
FM STEREO/AM RADIO
9-893-410-02
2012C33-1
©
2012.03
E Model
Ver. 1.1 2012.03
Frequency range:
FM: 87.5 MHz - 108 MHz
AM: 530 kHz - 1,710 kHz
AM: 530 kHz - 1,710 kHz
Speaker:
Approx. 3.6 cm (1
7
/
16
inches) dia, 7.2 (2)
Input:
AUDIO IN jack ( 3.5 mm stereo minijack) (1)
Outputs:
(headphones) jack ( 3.5 mm stereo minijack) (1)
AUDIO OUT jack ( 3.5 mm stereo minijack) (1)
Power output:
80 mW + 80 mW (JEITA*)
Power requirements:
3 V DC, two size AA (R6) batteries
Dimensions:
Approx. 155 mm × 78.5 mm × 32.5 mm (6
1
/
8
inches × 3
1
/
8
inches × 1
5
/
16
inches)
(w/h/d, projecting parts not included)
Approx. 155.4 mm × 80.3 mm × 34.2 mm (6
Approx. 155.4 mm × 80.3 mm × 34.2 mm (6
1
/
8
inches × 3
1
/
4
inches × 1
3
/
8
inches)
(w/h/d, projecting parts included)
(JEITA*)
(JEITA*)
Mass:
Approx. 198 g (7 oz) (batteries included)
* JEITA
(Japan
Electronics and Information Technology Industries Association) standards.
Supplied accessories
Operating Instructions (1)
Audio connecting cable (stereo mini plug
Audio connecting cable (stereo mini plug
stereo mini plug) (1)
Design and specifications are subject to change without notice.
On Copyrights
“WALKMAN” and “WALKMAN” logo are registered trademarks of Sony
Corporation.
Corporation.
NOTES ON CHIP COMPONENT REPLACEMENT
•
•
Never reuse a disconnected chip component.
•
Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
aged by heat.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong
viscosity
Unleaded solder is more viscous (sticky, less prone to fl ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
•
Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
also be added to ordinary solder.
SRF-18
2
SECTION 1
DISASSEMBLY
• This set can be disassembled in the order shown below.
1-1. DISASSEMBLY FLOW
1-2. FRONT CABINET BLOCK
(Page
(Page
3)
1-3. MAIN BOARD BLOCK
(Page
(Page
4)
SET
1-4. MAIN
BOARD
(Page
5)
1-5. KNOB
(TUNE)
(Page
6)
1-6. GEAR
(VC)
(Page
6)
SRF-18
3
Note: Follow the disassembly procedure in the numerical order given.
1-2. FRONT CABINET BLOCK
1
Open the battery case lid.
– Rear bottom view –
2
three screws
(1.7)
9 front cabinet block
JIG
When disassembling the unit,
use the following jig.
use the following jig.
Part No.
Description
9-913-402-33 Tool for Disassembly
3 Insert the jig in the space between
the cabinet front assy and the cabinet
rear assy and remove.
4
three claws
4
claw
4
three claws
6
adhesive sheet
– Front top view –
– Front top view –
5 Remove all claws while
rounding in outer.
7 Lift up the cabinet front assy
in the direction of an arrow.
4
three claws
8
Remove
two
solders.
brown
orange
red
blue
speaker (3.6 cm)
speaker (3.6 cm)
8
Remove
two
solders.
:ire VettinJ
:ire VettinJ
6
two adhesive
sheets
+
-
+
-
SRF-18
4
qa MAIN board block
5
two screws
(1.7)
5
two screws
(1.7)
5
screw (1.7)
5
screw (1.7)
– Front top view –
– Front top view –
2
knob (power) block
8
holder
(headphone)
battery terminal (+)
4
transparent plate
1
two claws
9
Remove the solder.
MAIN board
:ire VettinJ
6 Lift up the holder
(headphone)
block.
3 Peel off the transparent plate
from adhesive sheet.
3 Peel off the transparent plate
from adhesive sheet.
7 Remove the battery
terminal (+) in the
direction of an arrow.
0 Lift up the MAIN board block
in the direction of an arrow.
knob
(power)
(power)
switch
(S501)
(S501)
Note: When installing the knob (power),
the position of switch (S501) and
claw of knob (power) is set and installed.
Note: When installing the transparent plate, the position of
convex part and ditch is set and installed.
ditch
1-3. MAIN BOARD BLOCK
