Sony ICF-F1 (serv.man2) Service Manual ▷ View online
SECTION 3
ELECTRICAL ADJUSTMENTS
2-6. DIAL POINTER
— 5 —
— 6 —
Screw
CV1
1mm
Chassis
Chassis
4
Scale, dial
Rack
Shaft (tune)
2
Rotate the Shaft (tune)
in the direction of the arrow fully.
1
Install the tuning capacitor gear (A) in the direction
as shown while it is aligned with CV1.
Rack
Rack
Pointer
Two claws
3
Push the rack deep inside at the position
of 1 mm away from the end surface
of the Chassis as far as it can go.
of the Chassis as far as it can go.
5
Attach the pointer as follows
: While aligning the hole of the
pointer with the projection
of the rack, engage the two
claws of the pointer with
the chassis.
of the rack, engage the two
claws of the pointer with
the chassis.
BAND : AM
Signal generator
Signal generator
• Repeat the procedures in each adjustment several times for the
maximum level meter indication.
• The frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM SECTION
FM SECTION
[Adjustment Location : Main board] (Component side)
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
AM RF signal
generator
generator
0.01
µ
F
FM RF signal
generator
generator
telescopic
antenna
terminal
antenna
terminal
75kHz (100%) amplitude modulation
by 1kHz signal.
Output level : as low as possible
by 1kHz signal.
Output level : as low as possible
16
Ω
set
+
–
level meter
Speaker terminal (SP1)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455 kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
600 kHz
CT1-1
1,400 kHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
87.35 MHz
CT1-2
108.25 MHz
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
516.5 kHz
CT1-4
1,631.5 kHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
CT1-3
108.25 MHz
BAND : FM
Signal generator
Signal generator
L3
CT1-2
CT1-2
FM
TRACKING
adjustment
TRACKING
adjustment
T1
AM IF
adjustmnet
AM IF
adjustmnet
CT1-4
AM
FREQUENCY
COVERAGE
adjustment
AM
FREQUENCY
COVERAGE
adjustment
CT1-3
FM
FREQUENCY
COVERAGE
adjustment
FM
FREQUENCY
COVERAGE
adjustment
L5
AM
FREQUENCY
COVERAGE
adjustment
AM
FREQUENCY
COVERAGE
adjustment
CT1-1
AM TRACKING
adjustment
AM TRACKING
adjustment
L1 AM TRACKING adjustment
ICF-F1
— 7 —
— 8 —
SECTION 4
DIAGRAMS
4-1.
PRINTED WIRING BOARDS
Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
MAIN BOARD
S1
(BAND)
E
Q1
C22
C28
C25
C27
30
C24
CF1
C21
R17
C18
C19
C17
R7
R8
CF2
CF4
16
T1
R5
CF3
C16
IC1
15
C12
C20
C26
C13
1
C14
R15
R3
CV1
L5
C4
C9
C5
L6
L3
C11
BPF1
C32
R10
Q2
E
C29
R14
R16
C33
D2
D1
R9
C31
C30
1-678-312
11
(11)
LED BOARD
D3 (LIGHT)
1-678-315
11
(11)
JACK BOARD
R11
C34
1-678-314
11
(11)
VOL BOARD
RV1
R4
S2
1-678-313
11
(11)
16
CT1-4
CT1-1
CT1-2
CT1-3
CV1-2
CV1-3
CV1-4
CV1-1
TUNING
L1
AM FERRITE
ROD ANTENNA
AM
FM
DRY
BATTERY SIZE ''C''
(ICE DESIGNATION R14)
2PCS, 4.5V
ANT1
FM TELESCOPIC
ANTENNA
A
B
C
G
F
D
E
1
2
4
3
5
6
7
G
F
DC IN 4.5V
J2
J1
SP1
(SPEAKER)
1
2
3
4
5
E
D
C
B
A
D5
(POWER)
LIGHT
D4
(POWER)
POWER/VOLUME
6
7
1
2
A
B
C
D
E
F
G
3
4
5
6
7
8
9
10
ICF-F1
— 9 —
— 10 —
4-2.
SCHEMATIC DIAGRAM
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM
(
no mark : FM
(
) : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
: FM
f
: AM
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
• IC BLOCK DIAGRAM
IC1
CXA1019S
1
2
3
4
5
6
7
8
9
10
15
14
13
12
11
FM
DISCRIMINATOR
AF POWER AMP
AM FE
FM IF
TUNING
METER
AM IF DET AGC
FM FE
23
22
21
20
24
25
19
18 17 16
29 28 27 26
30
GND
GND
AF OUT
VCC
RIPPLE
FIL
TER
AF IN
DET OUT
AFC AGC
AFC AGC
IF GND
METER
N.C
FM IF IN
AM IF IN
FM/AM BAND
SELECT
FM/AM
IF OUT
FE GND
N.C
AM RF IN
FM RF
REG OUT
FM OSC
FM RF IN
AFC
AM OSC
VOL
NF
FM DISCRI
GND
GND
C6
33p
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