Sony Icf 8 Service Manual

							MICROFILM
SERVICE MANUAL
Ver 1.3  2000. 10
With SUPPLEMENT-1
(9-924-922-81)
With SUPPLEMENT-2
(9-924-922-82)
With SUPPLEMENT-3
(9-924-922-83)
ICF-8
FM/AM RADIO
ICF-8L
FM/LW RADIO
AEP Model
UK Model
ICF-8/8L
E Model
ICF-8
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.
SPECIFICATIONS
ICF-8/8L
Photo: ICF-8 
						

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SECTION  1
GENERALThis section is extracted from
instruction manual. 
						

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CABINET  (REAR)
MAIN  BOARD
Note: Follow the disassembly procedure in the numerical order given.
SECTION  2
DISASSEMBLY
2three screws
(P2 ´ 8)
8cabinet (rear)
3two claws
3two claws
47
telescopic antenna
1Remove the battery lid.
3two claws
6lug
5screw (B1.7 ´ 4)
9cabinet (front)
1Remove two solders
of the speaker leads.
4two claws
2battery terminal (–)
5MAIN board
A
3
battery terminal (+) CV1
Note:On installation MAIN board, 
turn CV1 shaft in the arrow A 
direction fully. 
						

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DIAL  POINTER  SETTING
Note: Follow the assembly procedure in the numerical order given.
¥ POINTER
¥ KNOB  (TUNE)1pointer
5knob (TUNE)
4Insert the knob (TUNE) to the pointer 
fitting the two gear portion of the knob (TUNE) 
to the concave portion of the pointer.
3
hole
hole
knob (TUNE)
pointer 
						

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SECTION  3
ELECTRICAL  ADJUSTMENTS
PRECAUTION
¥ Adjustment should be performed in the order given.
0 dB=1 µV
[FM]
Setting:
BAND switch: FM
[AM/LW]
Setting:
BAND switch: AM/LW
¥ Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
Adjustment Location: MAIN board (Component Side)
FM RF signal 
generator
22.5 kHz frequency 
deviation by 
400 Hz signal.
Output level: as low as possibleFM antenna IN level meter
set
earphone jack (J1) 32 
½
+
– 0.01 µF
AM RF signal 
generator
30% amplitude 
modulation by 
400 Hz signal
Output level: as low as possiblePut the lead-wire
antenna close to 
the set.level meter
set
earphone jack (J1) 32 
½
+
–
( ): Italian model, [    ]: East European model
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L3 86.5 MHz (87.35 MHz) [64.0 MHz]
CT3 109.5 MHz (108.25 MHz) [109.5 MHz]
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2 86.5 MHz (87.35 MHz) [64.0 MHz]
CT2 109.5 MHz (108.25 MHz) [109.5 MHz]
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1 455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT (ICF-8)
Adjust for a maximum reading on level meter.
L4 520 kHz (516.5 kHZ)
CT4 1,650 kHz (1,631.5 kHz)
AM TRACKING  ADJUSTMENT (ICF-8)
Adjust for a maximum reading on level meter.
L1 620 kHz
CT1 1,400 kHz
LW FREQUENCY COVERAGE ADJUSTMENT (ICF-8L)
Adjust for a maximum reading on level meter.
L4 145 kHz
CT6 265 kHz
LW TRACKING ADJUSTMENT (ICF-8L)
Adjust for a maximum reading on level meter.
L1 160 kHz
CT5 240 kHz
AM Tracking
AdjustmentL1
CT1
FM Tracking 
AdjustmentT1
AM IF 
AdjustmentFM Antenna IN CT2
L2
LW Tracking 
Adjustment L1
CT5FM Frequency
Coverage
AdjustmentJ1
CT3
L3
LW Frequency 
Coverage
AdjustmentCT6
L4
AM Frequency 
Coverage
AdjustmentL4
CT4
SECTION  4
DIAGRAMS
¥ IC Block Diagram
IC1 CXA1019M
FM FE
TUNING METER
AM IF DET AGCAF POWER AMP FM IF
FM/AM
IF OUT
FM RF IN FE GND
NC
AM RF IN
FM RF
FM OSC REG OUT
AFC
AM OSC
NF VOL
FM DISCRI
GND FM/AM BAND 
SELECT
FM IF IN AM IF IN
NC
METER
IF GND
DET OUTAFC AGCAFC AGC
AF IN
RIPPLE FILTER
AF OUTVCC
GND
AM FEFM
DISCRIMINATOR
14 13
121110 9 8 7 2 16534
15
161718
1920
21
22
23
242526
2728
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 CF2 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 itÕs supply two pieces in one package as a spare parts.
CF2
CF3 mark 
						

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SECTION  5
EXPLODED  VIEW
¥ Items marked Ò*Ó are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
¥ The mechanical parts with no reference num-
ber in the exploded views are not supplied.
¥ Accessories and packing materials are given
in the last of the electrical parts list. NOTE:
¥ -XX and -X mean standardized parts, so they
may have some difference from the original
one.
¥ Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
­­
Parts Color Cabinets Color
¥ Abbreviation
EE : East European
FR : French
IT : Italian
Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark
1 3-027-092-01 PLATE, TRANSPARENT (ICF-8)
1 3-027-092-11 PLATE, TRANSPARENT (FR)
1 3-027-092-21 PLATE, TRANSPARENT (EE)
2 3-027-089-01 CABINET (FRONT) (ICF-8)
2 3-027-089-11 CABINET (FRONT) (ICF-8L)
3 3-027-106-01 TERMINAL (+), BATTERY
4 3-027-096-01 POINTER
5 3-027-093-01 KNOB (TUNE)
*6 A-3683-011-A MAIN BOARD, COMPLETE (AEP, UK, E)
*6 A-3683-012-A MAIN BOARD, COMPLETE (IT)
*6 A-3683-013-A MAIN BOARD, COMPLETE (FR)
*6 A-3683-014-A MAIN BOARD, COMPLETE (EE)
7 3-027-094-01 KNOB (VOL)8 3-027-095-01 HOLDER (FERRITE-ROD ANTENNA)
9 3-318-203-61 SCREW (B1.7X4), TAPPING
10 7-623-505-01 LUG, 2
11 3-027-090-01 CABINET (REAR)
12 7-685-105-14 TAPPING +P 2X8 NON-SLIT
13 3-027-091-01 LID, BATTERY CASE
14 3-027-108-01 CUSHION (BATTERY)
15 3-027-107-01 TERMINAL (-), BATTERY
16 3-893-381-01 STRAP, HAND
ANT1 1-501-247-21 ANTENNA, TELESCOPIC
L1 1-754-018-11 ANTENNA, FERRITE-ROD (LW) (ICF-8L)
L1 1-754-019-11 ANTENNA, FERRITE-ROD (MW) (ICF-8)
SP1 1-503-616-11 SPEAKER
Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark
*A-3683-011-A MAIN BOARD, COMPLETE (AEP, UK, E)
*A-3683-012-A MAIN BOARD, COMPLETE (IT)
*A-3683-013-A MAIN BOARD, COMPLETE (FR)
*A-3683-014-A MAIN BOARD, COMPLETE (EE)
*********************
3-027-094-01 KNOB (VOL)
3-027-095-01 HOLDER (FERRITE-ROD ANTENNA)
< CAPACITOR >
C1 1-163-141-00 CERAMIC CHIP 0.001uF 5% 50V
C2 1-161-051-00 CERAMIC 0.01uF 10% 50V
(ICF-8)
C2 1-161-055-00 CERAMIC 0.022uF 10% 50V
(ICF-8L)
C3 1-104-664-11 ELECT 47uF 20% 16V
C4 1-163-106-00 CERAMIC CHIP 36PF 5% 50V
(EE)
C4 1-163-235-11 CERAMIC CHIP 22PF 5% 50V
(EXCEPT IT, EE)
C4 1-163-237-11 CERAMIC CHIP 27PF 5% 50V
(IT)
C5 1-163-091-00 CERAMIC CHIP 8PF 50V
(EE)
C5 1-163-235-11 CERAMIC CHIP 22PF 5% 50V
(EXCEPT IT, EE)
C5 1-163-237-11 CERAMIC CHIP 27PF 5% 50V
(IT)
C6 1-163-097-00 CERAMIC CHIP 15PF 5% 50V
(EE)
C6 1-163-104-00 CERAMIC CHIP 30PF 5% 50V
(EXCEPT IT, EE)
C6 1-163-106-00 CERAMIC CHIP 36PF 5% 50V
(IT)
C7 1-163-021-00 CERAMIC CHIP 0.01uF 10% 50V
C8 1-126-963-11 ELECT 4.7uF 20% 50V
C9 1-163-021-00 CERAMIC CHIP 0.01uF 10% 50V
C10 1-126-963-11 ELECT 4.7uF 20% 50V
C11 1-126-963-11 ELECT 4.7uF 20% 50V
C12 1-124-907-11 ELECT 10uF 20% 50V
C13 1-163-038-00 CERAMIC CHIP 0.1uF 25V
C14 1-161-051-00 CERAMIC 0.01uF 10% 50V
(ICF-8L)
C14 1-161-055-00 CERAMIC 0.022uF 10% 50V
(ICF-8)
C15 1-124-907-11 ELECT 10uF 20% 50V
C16 1-126-925-11 ELECT 470uF 20% 10V
SECTION  6
ELECTRICAL  PARTS  LIST
NOTE:
¥ Due to standardization, replacements in the
parts list may be different from the parts speci-
fied in the diagrams or the components used
on the set.
¥ -XX and -X mean standardized parts, so they
may have some difference from the original
one.
¥ RESISTORS
All resistors are in ohms.
METAL: Metal-film resistor.
METAL OXIDE: Metal oxide-film resistor.
F: nonflammable¥ Items marked Ò*Ó are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when order-
ing these items.
¥ SEMICONDUCTORS
In each case, u: µ, for example:
uA. . : µA. . uPA. . : µPA. .
uPB. . : µPB. . uPC. . : µPC. .
uPD. . : µPD. .
¥ CAPACITORS
uF: µF
¥ COILS
uH: µHWhen indicating parts by reference
number, please include the board.
¥ Abbreviation
EE : East European
FR : French
IT : Italian
C17 1-164-346-11 CERAMIC CHIP 1uF 16V
C18 1-164-346-11 CERAMIC CHIP 1uF 16V
(ICF-8)
C18 1-164-505-11 CERAMIC CHIP 2.2uF 16V
(ICF-8L)
C19 1-104-666-11 ELECT 220uF 20% 6.3V
C20 1-163-251-11 CERAMIC CHIP 100PF 5% 50V
C21 1-163-222-11 CERAMIC CHIP 5PF 0.25PF 50V
(ICF-8)
C21 1-163-235-11 CERAMIC CHIP 22PF 5% 50V
(ICF-8L)
C22 1-163-093-00 CERAMIC CHIP 10PF 5% 50V
(ICF-8)
C22 1-163-121-00 CERAMIC CHIP 150PF 5% 50V
(ICF-8L)
C23 1-163-021-00 CERAMIC CHIP 0.01uF 10% 50V
(ICF-8L)
C24 1-163-141-00 CERAMIC CHIP 0.001uF 5% 50V
C25 1-163-141-00 CERAMIC CHIP 0.001uF 5% 50V
< FILTER >
CF1 1-577-072-11 FILTER, CERAMIC (ICF-8)
CF1 1-781-035-11 FILTER, CERAMIC (ICF-8L)
CF2 1-579-632-51 FILTER, CERAMIC
CF3 1-579-632-51 FILTER, CERAMIC
< VARIABLE CAPACITOR >
CV1 1-141-497-11 CAP, VAR (TUNE) (EXCEPT EE)
CV1 1-141-498-11 CAP, VAR (TUNE) (EE)
CT1-4 1-141-497-11 CAP, VAR (EXCEPT EE)
CT1-4 1-141-498-11 CAP, VAR (EE)
CT5 1-141-604-11 CAP, ADJ (ICF-8L)
CT6 1-141-604-11 CAP, ADJ (ICF-8L)
< DIODE >
D1 8-719-991-33 DIODE 1SS133T-77
D2 8-719-991-33 DIODE 1SS133T-77
D3 8-719-059-87 DIODE SLR-342VRTB7 (TUNE)
< IC >
IC1 8-752-050-16 IC CXA1019M
MAIN
1
2
3SP1
4
6
7
9
10
11
12
8
ANT1
L1
5
15
16
1413 
						

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Ref. No.Part No.DescriptionRemarkRef. No.Part No.DescriptionRemark
MAIN
< JACK >
J1 1-770-666-11 JACK (@)
< COIL >
L1 1-754-018-11 ANTENNA, FERRITE-ROD (LW) (ICF-8L)
L1 1-754-019-11 ANTENNA, FERRITE-ROD (MW) (ICF-8)
L2 1-416-799-11 COIL, AIR-CORE (EXCEPT EE)
L2 1-416-800-11 COIL, AIR-CORE (EE)
L3 1-422-131-00 COIL, FM OSCILLATION (EXCEPT IT, EE)
L3 1-428-768-11 COIL, AIR-CORE (EE)
L3 1-460-018-11 COIL (WITH CORE)( IT)
L4 1-406-028-00 COIL, OSC (MW)
L5 1-416-459-11 COIL, AIR-CORE
L6 1-410-294-11 INDUCTOR       38uH (ICF-8L)
< RESISTOR >
R1 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
R2 1-216-045-00 METAL CHIP 680 5% 1/10W
R3 1-216-053-00 METAL CHIP 1.5K 5% 1/10W
R4 1-216-013-00 METAL CHIP 33 5% 1/10W
R6 1-216-057-00 METAL CHIP 2.2K 5% 1/10W
(ICF-8L)
R7 1-216-061-00 METAL CHIP 3.3K 5% 1/10W
(EXCEPT IT)
R9 1-216-071-00 METAL CHIP 8.2K 5% 1/10W
R10 1-216-063-00 RES, CHIP 3.9K 5% 1/10W
< VARIABLE RESISTOR >
RV1 1-225-441-41 RES, VAR, CARBON 50K (VOL)
< SWITCH >
S1 1-572-633-11 SWITCH, SLIDE (BAND)
< TRANSFORMER >
T1 1-404-790-11 TRANSFORMER, IF (ICF-8)
T1 1-404-902-11 TRANSFORMER, IF (ICF-8L)
************************************************************
MISCELLANEOUS
***************
ANT1 1-501-247-21 ANTENNA, TELESCOPIC
SP1 1-503-616-11 SPEAKER
************************************************************
ACCESSORIES & PACKING MATERIALS
********************************
3-864-359-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH,
GERMAN, SPANISH, DUTCH, ITALIAN,
PORTUGUESE, RUSSIAN, CHINESE)
   
						

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ICF-8/8L
Sony Corporation
Personal A&V Products Company9-924-922-11
98F0565-1
Printed in Japan  © 1998. 6
Published by Quality Engineering Dept.
(Shibaura)