Read Sony ICF-R40 Service Manual online
ICF-R40
– 7 –
– 8 –
SECTION 5
DIAGRAMS
13
10
15
18
11
6
8
FM
FRONT-END
FM
IF AMP
AF
POWER AMP
AM IF AMP,
AGC, DET
AM
FRONT-END
17
20
FM RF
IN
IN
MIX
OUT
CF2
10.7MHz
CF1
455kHz
CF3
10.7MHz
Q1
TONE CONTROL
SWITCH
FM RF
FM IF
3
FM
DISCRIMINATOR
TUNING METER
DISCRI
28
AF
OUT
SP1
(SPEAKER)
AF
IN
IN
24
16
25
DET
AM IF
METER
VOL
5
BAND
REG
AM OSC
L4
AM OSC
L3
FM OSC
L1
AM FERRITE-ROD
ANTENNA
FM OSC
AM
ANT
ANT
L2
FM RF
FM/AM FRONT-END,
FM/AM IF AMP, DET, AGC, AF AMP
IC1
TIMER
IC2
CT1-2
+
+
CT1-3, L3
FM FREQUENCY
COVERAGE
CT1-1, L4
AM FREQUENCY
COVERAGE
CT1-4, L2
FM TRACKING
CT1-2, L1
AM TRACKING
T1
AM IF
• SIGNAL PATH
: FM
: AM
05
9
DRY BATTERY
SIZE “AAA”
(IEC DESIGNATION R03)
2PCS. 3V
FM/AM TUNER
(IC1) B+
J1
(EARPHONE)
@
EP1
(EARPHONE)
B+ SWITCH
Q3
BAND-PASS
FILTER
Q2
CR
OSCILLATOR
COUNTER
OSC
CHATTERING
PROTECTOR
CONTROL
B+
OUT
SET
RESET
D5
C33, R15 – 17
VDD
OSC1 – OSC3
8
7
6
5
1 – 3
ON
OFF
AUTO OFF
S2
POWER
D2
TUNE
RV1
VOL
CV1
TUNE
CV1
TUNE
AM
FM
S4
BAND
S5
NOISE CUT
ON
OFF
CT1-4
CT1-3
CV1-2
CV1-4
CT1-1
CV1-1
CV1-3
S1
@/™
EARPHONE
SPEAKER
27
REG
B+
(1.25V)
VCC
5-1.
BLOCK DIAGRAM
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