Sony ICF-F12S User manual

SERVICE MANUAL
Published by Sony Techno Create Corporation
Sony Corporation
Audio Business Group
ICF-F11S/F12S
SPECIFICATIONS
FM/SW/MW 3 BAND RADIO
9-887-911-02
2007L05-1
© 2007.12
E Model
Ver. 1.1 2007.12
Frequency range:
Band ICF-F11S ICF-F12S
FM 87.5-108 MHz 87.5-108 MHz
MW 530-1 605 kHz 530-1 605 kHz
SW 2.3-7.35 MHz 5.9-18 MHz
Speaker
Approx. 9.2 cm (3 5/8inches) dia., 4 Ω
Output
v(earphone) jack (ø3.5mm minijack)
Power output
300 mW (max)
Power requirements
3V DC, two R20 (size D) batteries
Dimensions
Approx. 216 ×129.8 ×68.6 mm (w/h/d)
(8 5/8×5 1/8×2 3/4inches) incl. projecting parts and
controls
Mass
Approx. 676 g (1 lb 8 oz) incl. carrying strap and
batteries
Supplied accessories
carrying strap (1)
Design and specifications are subject to change
without notice.
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.
Photo : ICF-F12S

ICF-F11S/F12S
2
SECTION 1
SERVICING NOTES
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
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
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.
Soldering irons using a temperature regulator should be set to
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 viscou-s (sticky, less prone to flow)
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.
HOW TO CHANGED THE CERAMIC FILTERS
This model is used two ceramic filters of CF1 and CF3.
You must used same type of color marked ceramic filters in order
to meet same specifications.
Therefore, the ceramic filter must be changed two pieces together
since it’s supply two pieces in one package as a spare parts.
Mark Center frequency
red 10.70 MHz
blue 10.67 MHz
orange 10.73 MHz
black 10.64 MHz
white 10.76 MHz
CF3
mark
CF1
A
B
Telescopic antenna
Antena telescópica
FM MW SW
R20 (size D) ×2
R20 (tamaño D) ×2
Insert the Eside of the battery first.
Inserte primero el lado Ede la pila.
Rear
Parte posterior
Installing the
batteries
(See fig. A)
1Open the battery compartment lid.
2Install two R20 (size D) batteries (not
supplied) with correct polarity.
3Close the lid.
Battery life (Approx. hours) (JEITA*)
When using FM SW MW
Sony R20 (size D) 200 220 220
* 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 batteries
When the sound becomes weak or distorted, replace
all the batteries with new ones.
Notes on batteries
• Do not charge the dry batteries.
• Do not carry the dry batteries with coins or other
metallic objects. It can generate heat if the positive
and negative terminals of the batteries are
accidentally contacted by a metallic object.
• Do not use different types of batteries at the same
time.
• When you replace the batteries, replace all with new
ones.
• When you are not going to use the unit for a long
time, remove the batteries to avoid damage from
battery leakage and corrosion.
Improving the
reception
(See fig. B)
FM: Extend the telescopic antenna and adjust the
angle for optimum reception.
MW: Rotate the unit horizontally for optimum
reception. A ferrite bar antenna is built into the
unit.
SW: Extend the telescopic antenna vertically.
Note
Adjust the direction of the
antenna by holding the bottom of
it. The antenna can be damaged
when you move the antenna with
excessive force.
SECTION 2
GENERAL
This section is extracted
from instruction manual.

ICF-F11S/F12S
3
SECTION 3
DISASSEMBLY
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
Note: Follow the disassembly procedure in the numerical order given.
3-2. REAR CABINET BLOCK
3-2. REAR CABINET BLOCK
(Page 3)
3-3. MAIN BOARD, GEAR (VC)
(Page 4)
3-5. GEAR (VC) AND MAIN BOARD SETTING
(Page 5)
3-4. TELESCOPIC ANTENNA (ANT1),
BATTERY CASE LID, CABINET (REAR)
(Page 4)
SET
Open the battery case lid.
three claws
antenna cable
terminal board
(antenna)
Remove a
solder.
screw

rear cabinet block
screw

ICF-F11S/F12S
4
3-3. MAIN BOARD, GEAR (VC)
two screws
MAIN board
Remove a solder.
Remove two solders.
gear (VC)
Remove a solder.
3-4. TELESCOPIC ANTENNA (ANT1), BATTERY CASE LID, CABINET (REAR)
terminal board (antenna)
two bosses
cabinet (rear)
telescopic antenna (ANT1)
battery case lid
battery case lid
screw
(M3 ×6)
cushion
(battery)
cabinet (rear)

ICF-F11S/F12S
5
Note: Follow the assembly procedure in the numerical order given.
3-5. GEAR (VC) AND MAIN BOARD SETTING
gear (VC)
knob (tune)
Install the gear (VC)
as shown in figure.
Down the pointer.
pointer
Set the second concave portion
of pointer to the convex part
of the gear (VC).
first concave portion
rib of front cabinet
Match two gears.
Rotate knob (VOL)
in the direction
of the arrow fully.
Rotate the shaft of RV1 in the direction
of the arrow fully.
Rotate the shaft of CV1 in the direction
of the arrow fully.
two screws
MAIN board
The vicinity of hole at center
of gear (VC) and the pointer
must be parallel.
Note: Match the convex part of the gear (VC) to the second concave portion of pointer
with pointer lowered most.