ICF-CD853, ICF-CD853L - Sony Audio Service Manual (repair manual)

Model
ICF-CD853 ICF-CD853L
Pages
40
Size
2.1 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icf-cd853-icf-cd853l.pdf
Date

View Sony ICF-CD853 / ICF-CD853L Service Manual online

SERVICE MANUAL
CD player section
System: Compact disc digital audio system
Laser diode properties: Material: GaAlAs
Wavelength: 780 nm
Emission duration: Continuous
Laser output: Less than 44.6 µW
(This output is the value measured at a
distance of about 200 mm from the objective
lens surface on the optical pick-up block with
7 mm aperture.)
Frequency response: 20-20 000 Hz 
 +1
–1.5
 dB
Wow and flutter: Below measurable limit
Radio section
Frequency range:
Model for North America
Band
ICF-CD853
Channel step
FM
87.5 - 108 MHz
0.1 MHz
AM
530 - 1 710 kHz
10 kHz
Model for other countries
Band
ICF-CD853
ICF-CD853L
Channel step
FM
87.5 - 108 MHz 87.5 - 108 MHz
0.05 MHz
AM(MW) 531 - 1 602 kHz 531 - 1 602 kHz
9 kHz
LW
153 - 279 kHz
9 kHz
General
Time display:
UK, North and South America: 12-hour system
Other countries: 24-hour system
Speaker: 66 mm (2 
5
8
 inches) dia., 4 Ω
Outputs: i (headphones) jack (ø 3.5 mm
stereo minijack)
Power outputs:
1.2 W + 1.2 W (at 10% harmonic distortion)
Power requirements:
North American model:
120 V AC, 60 Hz
Other models:
220-230 V AC, 50 Hz
Dimensions:
Approx. 185.5 × 176 × 210.5 mm (w/h/d)
(Approx. 7 
3
8
 × 7 × 8 
3
8
 inches) incl.
projecting parts and controls
Mass:
Approx. 1 780 g (3 lb. 15 oz.)
ICF-CD853L (UK model):
Approx. 1 870 g (4 lb. 2 oz.)
Design and specifications are subject to change
without notice.
ICF-CD853
FM/AM CD CLOCK RADIO
ICF-CD853L
FM/MW/LW CD CLOCK RADIO
Canadian Model
Italian Model
East European Model
ICF-CD853
AEP Model
UK Model
ICF-CD853L
SPECIFICATIONS
ICF-CD853/CD853L
Ver 1.1  2002.07
9-873-680-02
Sony Corporation
2002G0500-1
Personal Audio Company
C
 2002.07
Published by Sony Engineering Corporation
Model Name Using Similar Mechanism
CFD-G70/G70L
Optical Block Name
KSM-213RDP
Optical Pick-up Name
KSS-213R
Photo: ICF-CD835L
2
ICF-CD853/CD853L
About CD-Rs/CD-RWs
This unit is compatible with CD-Rs/CD-RWs but
playback capability may vary depending on the
quality of the disc, the recording device and
application software.
TABLE  OF  CONTENTS
1.
SERVICING  NOTES
..............................................
3
2.
GENERAL
..................................................................
4
3.
DISASSEMBLY
3-1. Disassembly Flow ...........................................................
5
3-2. Rear Cabinet Assy ...........................................................
6
3-3. CD Lid .............................................................................
6
3-4. Upper Cabinet Assy ........................................................
7
3-5. MAIN Board ...................................................................
7
3-6. CD Block .........................................................................
8
3-7. Optical Pick-up Device (KSS-213R) ..............................
8
4.
ELECTRICAL  ADJUSTMENTS
Tuner Section .................................................................
9
CD Section .....................................................................  11
5.
DIAGRAMS
5-1. Block Diagram  – CD Section – .................................... 12
5-2. Block Diagram  – TUNER Section – ............................ 13
5-3. Block Diagram  – MAIN Section – ............................... 14
5-4. Note for Printed Wiring Board and
Schematic Diagrams ....................................................... 15
5-5. Printed Wiring Board  – CD Section – .......................... 16
5-6. Schematic Diagram  – CD Section – ............................. 17
5-7. Printed Wiring Board  – MAIN Section – ..................... 18
5-8. Printed Wiring Boards  – POWER Section – ................ 19
5-9. Schematic Diagram  – MAIN section (1/2) – ............... 20
5-10. Schematic Diagram  – MAIN section (2/2) – ............... 21
5-11. Printed Wiring Boards  – PANEL Section – ................. 22
5-12. Schematic Diagram  – PANEL Section – ...................... 23
5-13. IC Pin Function Description .......................................... 26
6.
EXPLODED  VIEWS
6-1. Cabinet Section ............................................................... 27
6-2. Upper Cabinet Section .................................................... 28
6-3. Front Cabinet Section ..................................................... 29
6-4. Rear Cabinet Section ...................................................... 30
6-5. Optical Block (KSM-213RDP) ....................................... 31
7.
ELECTRICAL  PARTS  LIST
.............................. 32
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.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE  TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able.  (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15 
µ
F
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation exposure.
ATTENTION  AU  COMPOSANT  AYANT  RAPPORT
À  LA  SÉCURITÉ!
LES  COMPOSANTS  IDENTIFIÉS  PAR  UNE  MARQUE  
0
SUR  LES  DIAGRAMMES  SCHÉMATIQUES  ET  LA  LISTE
DES  PIÈCES  SONT  CRITIQUES  POUR  LA  SÉCURITÉ
DE  FONCTIONNEMENT.  NE  REMPLACER  CES  COM-
POSANTS  QUE  PAR  DES  PIÈCES  SONY  DONT  LES
NUMÉROS  SONT  DONNÉS  DANS  CE  MANUEL  OU
DANS  LES  SUPPLÉMENTS  PUBLIÉS  PAR  SONY.
SAFETY-RELATED  COMPONENT  WARNING!!
COMPONENTS  IDENTIFIED  BY  MARK  
0
  OR  DOTTED
LINE  WITH  MARK  
0
  ON  THE  SCHEMATIC  DIAGRAMS
AND  IN  THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE
OPERATION.  REPLACE  THESE  COMPONENTS  WITH
SONY  PARTS  WHOSE  PART  NUMBERS  APPEAR  AS
SHOWN  IN  THIS  MANUAL  OR  IN  SUPPLEMENTS  PUB-
LISHED  BY  SONY.
This Compact Disc player is classified
as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT label
is located on the bottom exterior.
3
ICF-CD853/CD853L
S302
SECTION  1
SERVICING  NOTES
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The flexible board is easily damaged and should be handled with
care.
NOTES  ON  LASER  DIODE  EMISSION  CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION
CHECK
During normal operation of the equipment, emission of the laser
diode is prohibited unless the upper lid is closed while turning ON
the S302. (push switch type)
The following checking method for the laser diode is operable.
• Method
Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the S302 as shown in Fig.1.
Note:
 Do not push the detection lever strongly, or it may be bent or dam-
aged.
3. Press the
CD 
u
button.
4. Check the object lens for confirming normal emission of the
laser diode. If not emitting, there is a trouble in the automatic
power control circuit or the optical pick-up.
In this operation, the object lens will move up and down 2
times along with inward motion for the focus search.
NOTES  ON  HANDLING  THE  OPTICAL  PICK-UP
BLOCK  OR  BASE  UNIT
CHUCK  PLATE  JIG  ON  REPAIRING
On repairing CD section, playing a disc without the CD lid, use
Chuck Plate Jig.
• Code number of Chuck Plate Jig: X-4918-255-1
Fig.1 Method to push the S302
CF3
CF1
mark
Mark
Center frequency
red
10.70 MHz
blue
10.67 MHz
orange
10.73 MHz
black
10.64 MHz
white
10.76 MHz
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 changed two pieces together
since it’s supply two pieces in one package as a spare parts.
MODEL  IDENTIFICATION  – Bottom View –
 
Canadian model: AC: 120 V 
-
 60 Hz 15 W
Except Canadian model: AC: 220 – 230 V 
-
 50 Hz 15 W
MODEL NO.      ICF-CD853
4
ICF-CD853/CD853L
SECTION  2
GENERAL
This section is extracted from
instruction manual.
Features
• FM/AM 2 band (ICF-CD853) or FM/MW/LW
3 band (ICF-CD853L) PLL (phase locked loop)
synthesized clock radio
• Easy preset digital tuning with 15 memory
presets for ICF-CD853, 20 memory presets for
ICF-CD853L
• Built-in CD player with CD-R/RW playback
function
• Easy to see large Display with small footprint.
• Triple Alarm (Radio, buzzer or CD) with the
extendable snooze function.
• Easy nap timer –one push operation.
• LCD with backlight which has a brightness
control switch.
• D.S.T. (Daylight Saving Time) –Summer time
calculation.
Setting the Brightness
of the Backlight
Press BRIGHTNESS to select high, middle or low
for the display according to your preferences.
Setting the Clock
and Date
1
Plug in the clock radio.
The display will flash “AM 12:00” or “0:00”.
2
Press CLOCK for a few seconds.
You will hear a beep and the year will start to
flash in the display.
3
Press TUNE/TIME SET + or  until the
correct year appears in the display.
4
Press CLOCK  once.
5
Repeat steps 3 and 4 to set the month,
day, hour, and minute.
After setting the minute, press CLOCK  to
start the counting of the seconds, and you
will hear two short beeps.
To display the year and date, press
SNOOZE•DATE/SLEEP OFF once for the date,
and within 4 seconds press it again for the year.
The display shows the date or year for a few
seconds and then changes back to the current
time.
To set the current time rapidly,  hold down
TUNE/TIME SET + or .
The clock system varies depending on the model
you own.
12-hour system: “AM 12:00” = midnight
24-hour system: “0:00” = midnight
Setting the Alarm
This clock radio is equipped with 3 alarm
modes—CD, radio and buzzer. Before setting the
alarm, make sure to set the clock (see “Setting the
Clock and Date”).
To  Set the Alarm Time
To  Set the CD Alarm:
For the CD alarm, the track you specified as the
Wake-up track is played first.
(If the CD play mode is set to “SHUFFLE” or
“SHUFFLE REP”, however, all the tracks are
played in random order.)
1
With the alarm turned on, adjust the
volume to the level you require.
2
Press ALARM SET CD for a few
seconds.
“ALARM”, “CD” appear on the display.
After one beep, “ALARM” and the hour will
start to flash in the display.
3
Press TUNE/TIME SET + or  until the
desired hour appears.
To set the hour rapidly, hold down TUNE/
TIME SET +
 or .
4
Press ALARM SET CD.
The minute will flash.
5
Repeat step 3 to set the minute and
press ALARM SET CD.
The wake-up track number flashes on the
display.
6
Press TUNE/TIME SET + or  to select
the desired wake-up track number.
The wake-up track number can be set up to
99.
7
Press ALARM SET CD.
Two short beeps will confirm the setting.
The PRESET TUNING 3 button has a tactile dot.
La touche de PRESET TUNING 3 comporte un point tactile.
(headphones)
jack
Prise 
i
(casque)
FM wire antenna
Antenne fil FM
AC power cord
Cordon
d’alimentation
secteur
There is a tactile dot beside
volume to show the direction
to turn up the volume.
Un point tactile, situé à côté de
la molette de volume, indique le
sens dans lequel il faut tourner
pour augmenter le volume.
The CD u button has a tactile dot.
La touche CD 
u comporte un point tactile.
To  Set the Alarm Mode
Before setting the alarm mode, be sure to set the
alarm time. (See “To Set the Alarm Time”.)
Repeat the pressing of ALARM MODE to select
the alarm mode you want. Every time you press
ALARM MODE, CD/RADIO/BUZZER indicator
changes in the order as follows:
CD 
RADIO
BUZZER
CD+RADIO
CD+BUZZER
RADIO+BUZZER
CD+RADIO+BUZZER
OFF
The alarm time which plays or sounds next is
displayed.
To  Check the Alarm Setting
For ALARM SET CD, pressing once displays the
alarm time, pressing twice displays the wake-up
track number.
For ALARM SET RADIO, pressing once displays
the alarm time, pressing twice displays the wake-
up station.
For ALARM SET BUZZER, pressing once displays
the alarm time.
The display shows the alarm setting for a few
seconds and then returns to the previous display.
Alarm time in CD alarm, radio alarm and buzzer
alarm is set at AM 12:00 or 0:00 when you
purchased the unit.
Setting the Sleep
Timer
You can enjoy falling asleep to the radio using
the built-in sleep timer that turns off the CD or
the radio automatically after a preset duration.
Press SLEEP during CD or radio play.
You can set the sleep timer to durations of 90, 60,
30, or 15 minutes. Every push changes the
display as follows:
off (current time)
90
60
30
15
NAP indicator
Indicateur
NAP
Display window*
(12-hour system)
Afficheur*
(système par 12
heures)
* The display differs depending on
your country.
* L’affichage diffère selon votre pays.
6
Press TUNE/TIME SET + or  to select
the wake-up station.
Preset number changes in the order as
follows:
ICF-CD853
P-
AM P1 to 5
FM1 P1 to 5
FM2 P1 to 5
ICF-CD853L
P-
MW P1 to 5
FM1 P1 to 5
FM2 P1 to 5
LW P1 to 5
“P–” is the last received station.
You can directly select the desired wake-up
station by pressing RADIO•BAND or the
PRESET TUNING button while the indication
“P–” is not displayed.
7
Press  ALARM SET RADIO.
Two short beeps will confirm the setting.
To  Set the Buzzer Alarm:
1
Press ALARM SET BUZZER for a few
seconds.
“ALARM” and “BUZZER” appear on the
display.
After one beep, “ALARM” and the hour will
start to flash in the display.
2
Press TUNE/TIME SET + or  until the
desired hour appears.
To set the hour rapidly, hold down TUNE/
TIME SET +
 or .
3
Press ALARM SET BUZZER.
The minute will flash.
4
Repeat step 2 to set the minute and
press ALARM SET BUZZER.
Two short beeps will confirm the setting.
In step 5, when you press CLOCK after the
minute setting to activate the clock, the seconds
start counting from zero.
To  change the display to the
daylight saving time (summer time) indication
Press D.S.T./SUMMER T. .
” is displayed and the time indication
changes to summer time.
To deactivate the summer time function, press
D.S.T./SUMMER T.  again.
To  Set the Radio Alarm:
For the radio alarm, the station you specified as
the Wake-up station is played.
1
Tune in to a station and adjust the
volume.
2
Press ALARM SET RADIO for a few
seconds.
“ALARM” and “RADIO” appear on the
display.
After one beep, “ALARM” and the hour will
start to flash on the display.
3
Press TUNE/TIME SET + or  until the
desired hour appears.
To set the hour rapidly, hold down TUNE/
TIME SET + 
or –.
4
Press ALARM SET RADIO.
The minute will flash.
5
Repeat step 3 to set the minute and
press ALARM SET RADIO.
“WAKE UP STA” appears and the preset
number flashes on the display.
ALARM ON—
If you set the CD alarm and there is no disc in
the CD player, the buzzer alarm will sound in its
place at the time set.
For the buzzer alarm, the beeping of the alarm
becomes more rapid after every few seconds in
three progressive stages.
When headphones (not supplied) are plugged
into the unit, buzzer alarm through the speakers
and the headphones regardless of the alarm
mode setting. In this case, the unit will not play a
CD or radio.
Note
When CD, radio and  buzzer alarms are set for
the same time, the CD alarm takes precedence. If
the CD alarm is not set, the radio alarm takes
precedence.
To  Doze for a Few More
Minutes
Press SNOOZE•DATE/SLEEP OFF.
The CD, radio or buzzer alarm turns off but will
be automatically activated again after about 10
minutes.  Every time you press SNOOZE•DATE/
SLEEP OFF
, the snooze time changes as follows:
10 
20
50
60
30
40
The display shows the snooze time for a few
seconds and returns to show the current time.
When you press SNOOZE•DATE/SLEEP OFF
after the current time appeared, the snooze time
starts from 10 minutes again.
The maximum length of the snooze time is 60
minutes.
ALARM OFF—
The CD, radio, or buzzer alarm is turned off
automatically after 60 minutes.
To  Stop the Alarm
Press OFF x•ALARM RESET to turn off the
alarm.
The alarm will come on again at the same time
the next day.
To  Deactive the Alarm
Press ALARM MODE repeatedly until CD/
RADIO/BUZZER indicator go off.
“SLEEP” will appear in the display when the
duration time is set.
The radio will play for the time you set, then
shut off.
To turn off the CD or the radio before the preset
time, press SNOOZE•DATE/SLEEP OFF.
ICF-CD853/CD853L
5
• This set can be disassembled in the order shown below.
3-1.
DISASSEMBLY  FLOW
SECTION  3
DISASSEMBLY
3-2. Rear Cabinet Assy
(Page 6)
3-3. CD Lid
(Page 6)
3-4. Upper Cabinet Assy
(Page 7)
3-5. MAIN Board
(Page 7)
3-6. CD Block
(Page 8)
3-7. Optical Pick-up Device
(KSS-213R)
(Page 8)
SET
ICF-CD853/CD853L
6
Note:
 Follow the disassembly procedure in the numerical order given.
3-2.
REAR  CABINET  ASSY
3-3.
CD  LID
1
two screws (P3 
×
 10)
2
two screws (P3 
×
 14)
2
two screws (P3 
×
 14)
2
two screws (P3 
×
 10)
3
4
connector (CN305)
4
connector (CN901)
5
rear cabinet assy
1
screw (P3 
×
 10)
2
damper
3
boss
4
CD lid
3
boss
ICF-CD853/CD853L
7
3-4.
UPPER  CABINET  ASSY
3-5.
MAIN  BOARD
2
two screws (P3 
×
 10)
1
screw (3 
×
 10)
1
screw (3 
×
 10)
3
4
flexible flat cable (20core)
(CN301)
5
upper cabinet assy
3
MAIN board
2
four screws
(P3 
×
 10)
2
screw (P3 
×
 10)
1
flexible flat cable (14core)
(CN302)
ICF-CD853/CD853L
8
3-6.
CD  BLOCK
3-7.
OPTICAL  PICK-UP  DEVICE
(KSS-213R)
3
vibration proof (green)
3
vibration proof (green)
3
vibration proof (red)
3
vibration proof (red)
1
three screws
(2.6 
×
 10)
1
screw (2.6 
×
 10)
4
CD block
2
4
two screws (M2)
3
gear (B)
6
sled shaft
7
flexible flat cable (16core) (CNP701)
8
optical pick-up device
(KSS-213R)
5
1
two claws
1
two claws
2
CD cover
9
ICF-CD853/CD853L
MW VCO VOLTAGE ADJUSTMENT (CD853L)
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
531 kHz
2.7 
± 0.05 V
Confirmation
1602 kHz
9.5 
± 1.5 V
LW VCO VOLTAGE ADJUSTMENT (CD853L)
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
CT4
279 kHz
9.0 
± 0.05 V
Confirmation
153 kHz
2.35 
± 1.0 V
MW TRACKING ADJUSTMENT (CD853L)
Adjust for a maximum reading on level meter
L3-1
621 kHz
CT2
1404 kHz
LW TRACKING ADJUSTMENT (CD853L)
Adjust for a maximum reading on level meter
L3-2
162 kHz
CT3
243 kHz
FM VCO VOLTAGE CONFIRMATION
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
Confirmation
87.5 MHz
3.2 
± 0.5 V
Confirmation
108 MHz
10.3 
± 1.5 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment Location: MAIN board (See page 10)
TUNER  SECTION
0 dB=1 
µ
V
[AM (MW/LW)]
Setting:
Function : RADIO
RADIO BAND button : AM or MW or LW
[FM]
Setting:
Function : RADIO
RADIO BAND button: FM
• Repeat the procedures in each adjustment several times, and the
tracking adjustments should be finally done by the trimmer ca-
pacitors.
• Remove FM antenna in FM adjustment.
AM RF signal 
generator
30% amplitude
modulation by
400 Hz signal
Output level: 
as low as possible
Put the lead-wire
antenna close to 
the set.
+
level meter
set
4.0 
MAIN board
CN303 pin 
3
MAIN board
CN303 pin 
4
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: 
as low as possible
+
level meter
MAIN board
CN303 pin 
3
MAIN board
CN303 pin 
4
set
4.0 
0.01 
µ
F
MAIN board
TP (GND)
MAIN board
TP (FM IN)
digital voltmeter
TP (VT)
TP (GND)
100 k
MAIN board
SECTION  4
ELECTRICAL  ADJUSTMENTS
FM STEREO ADJUSTMENT
Setting:
Function: RADIO
RADIO BAND button: FM
1. Connect the frequency counter to TP (FMST) and TP (RA-
DIO +B) as shown the figure below.
2. Tune the set to 87.5 MHz (98 MHz).
3. Adjust RV1 for 75.95 to 76.05 kHz reading on the frequency
counter.
Adjustment Location: MAIN board (See page 10)
set
MAIN board
TP (FM IN)
MAIN board
TP (GND)
0.01 
µ
F
Carrier frequency : 87.5 MHz
(98 MHz)
Modulation
: no modulation
Output level
: 0.1 V (100 dB)
FM RF SSG
(   ): Except CD853: Canadian model
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
(
): Italian model
AM VCO VOLTAGE ADJUSTMENT (CD853)
Adjustment Part
Frequency Display
Reading on Digital Voltmeter
L4
530 kHz (531 kHz)
3.0 
± 0.05 V
Confirmation
1,710 kHz
9.7 
± 1.5 V (9.0 ± 1.5 V)
(1602 kHz)
(
): Italian model
AM TRACKING ADJUSTMENT (CD853)
Adjust for a maximum reading on level meter
L3
580 kHz (621 kHz)
CT2
1,490 kHz (1404 kHz)
33 k
+
+
MAIN board
TP (FMST)
TP (RADIO +B)
TP (GND)
frequency counter
µ
F/50 V
10
ICF-CD853/CD853L
Adjustment Location:
– MAIN BOARD (Component Side) –
CT3
L3-2
LW Tracking Adjustment (CD853L)
T1 AM (MW/LW) IF Adjustment
CT1
L1
FM Tracking Adjustment
RV1 FM Stereo Adjustment
L4 AM (MW) VCO Voltage Adjustment
CT4 LW VCO Voltage Adjustment
CT2
L3-1
AM (MW) Tracking Adjustment
CN303
TP
(VT)
TP (FM IN)
TP
(GND)
TP
(FM ST)
TP
(RADIO B+)
1
4
– MAIN BOARD (Conductor Side) –

Download Sony ICF-CD853 / ICF-CD853L Service Manual (Repair Manual)

Here you can view online and download Sony ICF-CD853 / ICF-CD853L Service Manual in PDF. ICF-CD853 / ICF-CD853L service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sony ICF-CD853 / ICF-CD853L Audio. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.