ICF-C218 (serv.man2) - Sony Audio Service Manual (repair manual)

E Model

Australian Model

2012J33-1
© 2012.10

Model for Australian, Central & South American 
                                    and Mexico: 12-hour system
Model for other countries/ regions: 24-hour system

FM

87.5 – 108 MHz

AM

530 – 1 710 kHz

Approx. 6.6 cm (2 

5

/

8

 inches) dia., 8 

Ω

150 mW (at 10% harmonic distortion)

Model for Central & South American and Mexico: 120 V
AC, 60 Hz

Model for Argentine: 220 - 230 V AC, 50 Hz

Model for Australian and Thailand: 230 V AC, 50 Hz

Model for other countries/ regions: 230 – 240 V
AC, 50 Hz
For power backup: 3 V DC, one CR2032 battery

Approx. 155 

×

 64.5 

×

 150 mm (w/h/d)

(6 

1

/

8

 

×

 2 

5

/

8

 

×

 6 inches) incl. projecting parts and controls

Model for Central & South American and Mexico: approx.
462.2g (1 lb 0.3 oz) incl. CR2032 battery
Model for Australian: approx.
498.2g (1 lb 2.1 oz) incl. CR2032 battery
Model for other countries/regions: approx.
470.2g (1 lb 0.6 oz) incl. CR2032 battery

Design and specifications are subject to change without notice.

2

0

0

Locating the Controls ......................................................

3

2-1. Disassembly Flow ....................................................

5

2-2. Front Panel, Upper Cabinet assy ..............................

5

2-3. MAIN Board ............................................................

6

Power Cord and Pointer Installation ...............................

6

.........................

7

4-1. Printed Wiring Board ...............................................

9

4-2. Schematic Diagram .................................................. 10

................................................ 12

................................ 13

This model is used two ceramic filters of CF2 and CF3.
You must use same type of color marked ceramic filters in order
to meet same specifications.
Therefore, the ceramic filter must change two pieces together since
it's supply two pieces in package as a spare parts.

mark

mark

CF3

CF2

red

blue

orange

black

white

10.70MHz

10.67MHz

10.73MHz

10.64MHz

10.76MHz

Mark

Center

frequency

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

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.)

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 viscous (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.

Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.

Accessories are given in the last of the electrical parts list.

3

This section is extracted
from instruction manual.

SN

OOZE / D

ATE / SL

EEP 

OFF

BAND

TUNIN

G

VO

L

AM

FM

*

* The display differs depending on your country.

4

Set the clock and date according to the following
steps.

Plug in the unit.

The display will flash “AM 12:00” or “0:00”.

Press CLOCK for more than 2 seconds.

You will hear a beep and the year will start to
flash in the display.

Press 

 or 

 until the correct year appears

in the display.

Press CLOCK.

Repeat steps 

 and 

 to set the month, day

and time.

After setting the time, two short beeps sound and
the clock starts from 0 seconds.

• Pressing and holding 

 or 

 changes the year, month

or day rapidly.
When setting the current time, time changes rapidly
by 1 minute-increments up to 10 minutes, and then
by 10 minute-increments.

• The clock system varies depending on the model

you own.
12-hour system: “AM 12:00” = midnight
24-hour system: “0:00” = midnight

• While setting the clock, you must perform each step

within 65 seconds, or the clock setting mode will be
cancelled.

Press SNOOZE/DATE/SLEEP OFF once
for the date, and within about 3 seconds press it
again for the year.

The display shows the date or year for about 3
seconds and then changes back to the current time.
If you connect the AC plug to AC outlet while this
unit is powered from the backup power source, the
current date and time appears in the following order.
(It is same as when the unit is powered on after the
power failure.)
“month and date” (about 1 second) t “year” (about 1
second) t “current time”

Press DST.

DST indicator appears in the display and the time
indication changes to the daylight saving time
(summer time).
To deactivate the daylight saving time (summer time)
adjustment, press DST again.

Press RADIO ON to turn on the radio.

Adjust volume using VOLUME.

Select BAND.

Tune in to a station using TUNING.

Press RADIO OFF/ALARM RESET.

:

Model for Central America and Mexico:

The AC power cord functions as an FM antenna.
Extend the AC power cord fully to increase
reception sensitivity.

Model for other countries/ regions:

Extend the FM wire antenna fully to increase
reception sensitivity.

:

Rotate the unit horizontally for optimum reception.
A ferrite bar AM antenna is built-in to the unit.

Do not operate the unit over a steel desk or metal
surface, as this may lead to interference of reception.

The alarm function can be select from two alarm
sounds, RADIO or BUZZER.

• Before setting the alarm, make sure to set the clock

(see “Setting the clock and date”).

• The factory setting alarm time is “PM 12:00” or

“12:00”.

• To set the radio alarm, first tune in to a station and

adjust the volume (see “Operating the radio”).

Set ALARM MODE to the desired alarm
sound (RADIO or BUZZER).

The alarm time appears for a few seconds, and
then the ALARM indicator lights up in the
display. (It does not appear when the switch is set
to OFF.)

Slide 

 or 

 to set

the desired time.

Each slide of 

 or 

 changes

the indication by 1 minute. If you keep sliding

 or 

, the alarm time goes

forward (or backward) by 1 minute up to 10
minutes, and then by 10 minutes increments.
While setting the alarm time, the ALARM
indicator flashes in the display.

When the alarm time setting operation is
complete, the display returns to the clock after a
few seconds and the ALARM indicator changes
from flashing to fully lit.

• While 

 is set to 

 or

, the alarm time setting can be changed by

.

One slide of 

 displays the

alarm time for about 4 seconds. By adjusting

 while the alarm time appears

in the display, the alarm time will be changed.

• The ALARM indicator flashes in the display while:

– The alarm time appears in the display.
– The alarm sounds.
– Snooze function is turned on.

• The alarm time setting cannot be changed if

is set to 

. If 

SET is adjusted, “OFF” appears in the display for
about 0.5 seconds.

•

 and 

 are unavailable while the alarm

sounds or snooze function is turned on.

Press SNOOZE/DATE/SLEEP OFF.

The sound turns off but will automatically come on
again after about 10 minutes. Each time you press

, the snooze time

changes as follows:

The maximum length of the snooze time is
60 minutes.
The display shows the snooze time for about
4 seconds and returns to show the current time. When
you press 

after the

current time appears, the snooze time starts from 10
minutes again.

Press RADIO OFF/ALARM RESET to
turn off the alarm.

The alarm will come on again at the same time the
next day.
If 

 is not pressed, the

alarm sounds continuously for about 60 minutes, and
then it will be stop automatically.

Turn ALARM MODE to OFF.
ALARM indicator disappears from the display.

If the alarm set time comes in the event of a power
interruption or a power interruption occurs while the
alarm is sounding, the display will turn off and the
alarm will not sound, and the alarm status will be as
follows. If power returns within 60 minutes from the
alarm set time, the alarm will sound. If the power
interruption occurred while the snooze function was
operating, the snooze function will continue. If the
snooze time had passed when the power interruption
occurred, the alarm will sound after power returns.

In this status, if the E indicator does not light up,

, 

 buttons

and 

 functions are available.

 time will be fixed only 10 minutes if the

 button has been pressed.

You can fall asleep to the radio using the built-in
sleep timer that turns off the radio automatically after
a preset duration.

Press SLEEP.
The radio turns on. You can set the sleep timer to
durations of 90, 60, 30, or 15 minutes. Each press
changes the display as follows:

Two short beeps sound when the display returns to
“90”.
The radio will play for the duration you set, then shut
off.

Press RADIO OFF/ALARM RESET or
SNOOZE/DATE/SLEEP OFF.

You can fall asleep to the radio and also be awakened
by the radio or buzzer alarm at the preset time.

Set the alarm. (See “Setting the alarm”.)

Set the sleep timer. (See “Setting the sleep
timer”.)