Read Sony SRF-R405 Service Manual online
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
3
B+ (+1.2V)
B+ (+1.2V)
D201-2
D201-3
L205
AM VCO
L202
L204
B+ (+1.2V)
B+ (+1.2V)
CT201
CT202
L201
AM FERRIT-ROD
ANTENNA
D201-1
D202
AM TRACKING
FM TRACKING
AM RF IN
AM OSC
AM FE
10
12
14
13
6
16
19
23
28
29
58
3
7
8
9
10
11
26
27
13
14
15
22
61
4
60
FM RF IN
7
FM RF
5
4
FM OSC
FM FE
D203
AFC
FMAM
FE OUT
FE OUT
FM VCO
AMP
Q201
B+
(+1.2V)
T201
AM IF
15
21
1
1
4
4
2
10
9
1
8
7
23
4
14
15
2
CF203
CF202
CF201
BAND
SELECT SWITCH
Q203
1.2V REG
SWITCH
Q202
TUNING,
MUTE SWITCH
Q204
MUTE
Q401
AM IF IN
BAND SELECT
FM IF IN
VOLTAGE
DETECT
IC505
2.9V REG
Q507
REG SWITCH
Q508
3V REG
Q603,604
DET OUT
VCC
NF2
FM
DISCRI
DISCRI
FM
DISCRIMINATOR
FM IF
AM IF
DET AGC
TUNING
METER
REG OUT
METER
NOISE CUT
BUFFER
Q305,
Q306(2/2)
NORMAL
BUFFER
Q303,304
R-CH
R-CH
S501
C
HOLD
ON
OFF
PLL LOW-PASS
FILTER
Q501,502
SW
S502-512
SYSTEM CONTROL
LIQUID CRYSTAL
DISPLAY
DRIVE
IC506
(NOISE CUT) P0B0
BAND
VCOL
XOUT
XIN
(HOLD) INT
P0A1 TV 4-12CH
P1B0 KS0
P1B1 KS1
P1B2 KS2
P1B3 KS3
P1A0 KR0
P1A1 KR1
P1A2 KR2
P1A3 KR3
EO
BEEP
17
POC1
35
36
37
39
36
37
39
40
|
44
46
46
|
53
55
56
55
56
COM0-3
LCD0-14
VDD
VDD
18
VDET2
6
P0A3 POWER
57
(VDET1) CE
P0A2 MUTE
FM/AM FRONT END
IC201
B+
(+3V)
RV401
∑
VOL
VOLTAGE
DETECT
IC503
TV (4-12CH)
3V REG
Q103
DC/DC CONVERTER
T601, Q601,602
LIQUID
CRYSTAL
DISPLAY
BATT2
LITHIUM
BATTERY
PAS621L
B+
(+3V)
B+
(+3V)
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R03)
2PCS, 3V
SIZE "AA"
(IEC DESIGNATION R03)
2PCS, 3V
(SPEAKER)
(EAR-RECEIVER)
SP101
(SPEAKER)
(SPEAKER)
HP101
(EAR-RECEIVER)
(EAR-RECEIVER)
S401
EAR-RECEIVER
/SPEAKER
J401
2
16
X701
75kHz
B+
(TV+3V)
• Signal path
:FM
:AM
TP1
ANT
ANT
8
Q306(1/2)
ANALOG SWITCH
Q307
DECODER
SYNC DET
VCO
VCO STOP
FF 0˚
FF 1/2
STEREO
SWITCH
SWITCH
PHASE
COMPARETE
LAMP
TRIGGER
FF 90˚
EP/SP
SWITCH
Q301,302
LOUT
ROUT
PRE+POWER2
VOL
REG
EP
SP
RV301
FM DECODER
IC301
POWER AMP
IC401
TP2
VCOL
TP9
CE
TP4
B+
TP4
76kHz
TP19
DET
TP18
D/D CON
L201, CT201
L202, CT202
FM STEREO (76kHz)
— 5 —
— 6 —
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