Read Sony SRF-PSY04 Service Manual online
SRF-PSY04
– 7 –
– 8 –
SECTION 4
DIAGRAMS
4-1.
BLOCK DIAGRAM
18
20
16
13
19
24
22
FM
FRONT-END
FM IF AMP/
DISCRI
DECODER
AMP
SWITCH
POWER
AMP
REGULATOR
1/2
COUNTER
1/2
COUNTER
AM IF AMP/
DET
TUNING
INDICATOR
PD1
VCO
PD2
AM
FRONT-END
14
FM RF
IN
IN
FM/AM
MIX OUT
CF3
10.7MHz
CF1
10.7MHz
SYSTEM CONTROLLER,
LIQUID CRYSTAL DISPLAY DRIVER,
KEY CONTROL
IC101
CF2
450kHz
FM
RF
RF
26
FM DISCRI
FM
IF IN
IF IN
6
7
21
5
L-CH
OUT
R-CH
OUT
4
27
29
1
2
3
ST IND
AM
IF IN
IF IN
PILOT DET
LPF2
12
TUNE IND
9
AFC1/AGC
15
BAND
SELECT
PILOT DET
LPF1
PLL
LPF1
PLL
LPF2
VCO
AM OSC
FM OSC
AM RF
IN
IN
FM/AM FRONT-END,
FM/AM DET, MPX
IC1
RV1
FM STEREO
(76kHz)
L5
AM FREQUENCY
COVERAGE
CT2, L3
FM TRACKING
S1
FM SENS
T1
AM IF
CT1, L2
AM TRACKING
L.P.F.
B.P.F.
FM VCO
BUFFER
BUFFER
Q1
FM/AM BAND
SELECT SWITCH
Q2
LIQUID CRYSTAL DISPLAY
LCD101
VOLTAGE
DETECT
IC102
B+ SWITCH
Q103, 104
DC/DC
CONVERTER
Q106, 107, T101
LOW-PASS
FILTER
Q101, 102
• SIGNAL PATH
: FM
: AM
05
POWER
AMP
MUTE
CONTROL
KEY MATRIX
S101 – 111
PC0 – PC3
PB0 – PB2
X1
75kHz
SYSTEM CONTROLLER (IC101) B+
FM/AM TUNER (IC1),
HEADPHONE AMP (IC2) B+
PLL LOW-PASS FILTER CIRCUIT B+
D102
–1
–2
HEADPHONE AMP
IC2
2
4
IN1
IN2
9
7
OUT1
OUT2
B+
VREF
CT1
D1-1
L2
AM FERRITE-ROD
ANTENNA
L3
FM RF
POWER
XOUT
XIN
CE
MT/SW
REG
VCC
EO
VCOL
VCOH
BAND
12
13
9
11
10
MUTE
10
BEEP
6
7
18
19
16
DX
LOCAL
D1-2
D3
CT2
D2
L5
AM OSC
L4
FM OSC
RV2
VOL
J1
(HEADPHONE)
2
DRY BATTERY
SIZE “AAA”
(IEC DESIGNATION R03)
2PCS. 3V
37, 38, 1
2 – 5
COM0 – COM3
32 – 29
LCD0 – LCD8
28 – 20
+
+
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