Sony SRF-R405 Service Manual ▷ View 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 —
SRF-R405
S502
1
S505
3
S503
4
S510
5
S511
6
S512
7
S504
2
TP12
KR2
KR2
TP10
KR0
KR0
TP15
KS1
KS1
TP11
KR1
KR1
TP16
KS2
KS2
TP17
KS3
KS3
D0
TP13
KR3
KR3
S509
ENT/BAND
(JOG LEVER)
S508
MENU
DET
C351
CF202
R312
76k
TP4
B
B
E
E
B
E
B
B
E
E
B
E
E
C1
C2
B1
B2
1 2
5
3
4
1
1
1
1
1
5
10
15
16
16
17
20
25
30 32
64
60
55
50 49
33
35
40
45
48
2
4
3
5
5
5
8
9
10
10
24
20
15
12
13
10
15
16
16
6
1-672-806-
MAIN BOARD
(SIDE A)
E
B
E
E
E
B
B
B
E
E
B
B
S401
S301
RV301
C401
(BLK)
(BRN)
SP101
(SPEAKER)
(SPEAKER)
BATT2
X501
RV401
VOL
S506
POWER
HOLD
NOISE CUT
S501
S507
(RED)
(BRN)
(BLK)
HP101
(EAR-RECEIVER)
(EAR-RECEIVER)
ON
OFF
1
2
3
4
E
E
E
E
B
B
B
B
E
B
E
B
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION RO3)
2PCS, 3V
EP
EP
SP
SP
CT201
CT202
J401
L201
ANTENNA FERRITE-ROD
1-672-806-
MAIN BOARD
(SIDE B)
R702
S301, S401
LCD101
R703
R509
R508
R514
R515
R516
R517
R518
R520
R522
R523
R524
R544
R550
R606
R404
C702
C701
C703
C518
R545
R548
R405
C316
C314
C313
C303
R529
TP3
(LPF)
TP1
(ANT)
R305
R304
R308
R307
R209
R206
R203
C203
C209
C205
C214
R207
R205
R408
R409
R302
C304
J401
C307
C302
R301
R309
R306
R216
R215
R313
C306
C407
R407
R406
C406
C216
R213
C208
C201
C207
R201 R204
R202
D203
C215
C202
R210
R212
C219
C223
R303
R214
R208
R403
R402
R401
C512
C705
C704
C504
C511
C503
R531
R530
R546
R603
R604
R602
C603
R549
R502
R601
R526
R605
D501
R532
C513
C502
R519
R525
R521
C602
C514
R527
C606
R218
11
(11)
11
(11)
Q602
16
1
2
A
B
C
D
E
F
G
H
I
J
3
4
5
6
7
8
9
10
11
12
13
14
4-2. PRINTED WIRING BOARD
— 7 —
— 8 —
Note on Printed Wiring Board:
• Y
: parts extracted from the conductor side.
•
®
: Through hole.
• b
: Pattern from the side which enables seeing.
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(SIDE B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(SIDE A)
the parts face are indicated.
Ref. No.
Location
• Semiconductor Location
Ref. No.
Location
D201
I-2
D202
J-3
D203
J-2
D204
H-12
D401
F-2
D501
D-10
D601
C-11
D602
C-10
IC201
I-3
IC301
G-3
IC401
F-4
IC503
C-12
IC505
D-4
IC506
C-3
Q201
I-2
Q202
I-12
Q203
H-12
Q204
H-12
Q301
G-13
Q302
G-11
Q303
H-2
Q304
H-2
Q305
H-2
Q306
G-2
Q307
G-2
Q401
G-11
Q501
D-11
Q502
D-11
Q507
D-10
Q508
D-11
Q601
D-10
Q602
D-10
Q603
F-4
Q604
F-4
SRF-R405
4-3. SCHEMATIC DIAGRAMS
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.
•
¢
: internal component.
•
C
: panel designation.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms 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
• Waveform
1
IC506
@•
(X OUT)
2
Q601
C
5
µ
sec/1Vdiv
0.2
µ
sec/2Vdiv
75kHz
3MHz
TP4
(76k)
4p
PLL LOW-PASS
FILTER
100k
S301
— 9 —
— 10 —
— 11 —
• Refer to page 13 for IC Block Diagrams.
— 12 —
4-4. IC PIN FUNCTION
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
I/O
O
O
O
O
–
O
O
O
O
O
I
–
I
I
I
O
O
I
O
–
–
O
I
I
–
–
I
O
–
–
–
–
–
O
O
O
–
O
O
O
O
O
O
O
–
O
O
O
O
O
Description
Serial data output terminal (Not used: open)
Chip selection output to EEPROM (Not used: open)
Band switching output “H”: TV (4 to 12 channels), “L”: FM/TV (1 to 3 channels)/AM (Not used: open)
Audio mute signal output
Not used (Ground)
Power ON/OFF control output
Key strobe signal output. *1
Key strobe signal output. *1
Key strobe signal output. *1
Key strobe signal output. *1
Key return signal input. *1
Not used (Ground)
Key return signal input. *1
Key return signal input. *1
Key return signal input. *1
Meter drive signal output (Not used: ground)
TV mode control signal output (Not used: ground)
Low power voltage detection input (Not used: ground)
Band switching signal output “H”: AM, “L”: FM/TV (1 to 3 channels)
Ground (Ground)
Ground (Ground)
PLL error signal output to PLL low-pass filter (Q401, 402)
VCO input from FM/TV (1 to 3 channels)/AM local oscillator
VCO input from TV (4 to 12 channels) local oscillator (Not used: open)
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Power supply input (3 V)
Power supply input (3 V)
System clock output (75 kHz)
System clock input (75 kHz)
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Terminal to which external capacitor for the circuit to generate the LCD drive voltage, is connected
Common signal output to LCD
Common signal output to LCD
Common signal output to LCD
Not used (Ground)
Common signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Not used (Ground)
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Segment signal output to LCD
Pin Name
DATA OUT
EEPROM CS
TV 4-12CH
MUTE
NC
POWER
KS0
KS1
KS2
KS3
KR0
NC
KR1
KR2
KR3
POC0
POC1
V DET2
BAND
GND
GND
EO
VCOL
VCOH
REG0
VDD
VDD
X OUT
X IN
REG 1
REG LCD0
CAP LCD0
CAP2 LCD1
REG LCD1
COM0
COM1
COM2
NC
COM3
LCD0
LCD1
LCD2
LCD3
LCD4
NC
LCD5
LCD6
LCD7
LCD8
LCD9
• IC506 µPD17073GB-921-9EU (System Control, LCD Drive)
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