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Model
SRF-T615
Pages
18
Size
834.49 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
srf-t615.pdf
Date
PREV: Sony ZS-M35 (serv.man3) Service Manual

Sony SRF-T615 Service Manual ▷ View online

– 9 –
– 11 –
– 10 –
SRF-T615
4-2. BLOCK DIAGRAMS
• Signal path.
F
: FM
2
3
4
5
6
7
8
9
10
A
1
B
C
D
E
F
G
H
02
[MAIN BOARD]  (SIDE B)
S503
POWER
S507
NOISE
CUT
S511
MENU
S501
HOLD>
ON
T
OFF
RV301
VOL    
C607
R541
R305
R508
R307
R301
R603
R542
R304
C601
R601
R604
R602
R605
R606
R533
C120
C604
C602
C608
C606
D602
D601
C603
C605
BCE
ECB
T601
Q603
Q604
BAT501
(LITHIUM BATTERY)
L302
SP401
SPEAKER
S301,302
i
5
BAT601
DRY BATTERY
SIZE "AAA"
(IEC DESIGNATION R03)
2PCS, 3V
X501
D501
D104
C311
C309
C310
C301
L102
C314
Q201
CF103
CF102
1
5
13
15
20
24
IC101
10 12
T101
TP102
(RF IN)
CT101 CT102
L103
L101
L104
AM FERRITE-ROD
ANTENNA
[MAIN BOARD]  (SIDE A)
S502
1
S508
2
S510
3
S506
4
S505
5
S509
6
S512
7
1
4
5
7
8 9
10
15
19
LCD501
R523
R518
R526
R528
R529
C509
IC501
2  1
3  4
2
1
3
4
IC503
C512
1
5
10
15
16
17
20
25
30
32
33
35
40
45
48
49
50
55
60
64
IC502
S504
ENTER/
BAND
ı
(–)
(BAND)
(+)
CF101
11
(11)
1-674-988-
11
(11)
1-674-988-
D101
-1 -2
-3
Q602
B
E
C
J301
i
R308
L303
D301
S301
S302
C114
C112
C128
C127
C204
C131
C315
C511
C306
R113
R125
R119
R309
R310
R607
R115
R201
R116
R120
R531
R536
C115
C124
C207
C313
C308
C307
C312
C201
C504
C521
C519
C503
C507
C508
C523
R520
R521
R522
R504
R509
R517
R516
R505
R506
R510
C506
C510
ECB
Q601
ECB
Q504
ECB
Q503
C17
BCE
BCE
Q202
C121
L106
L105
Q103
C206
C122
1
5
8
9
12
16
IC301
RV201
C116
C125
C126
C304
C303
C129
C517
C515
C514
C513
C525
C501
C502
R114
R111
R110
R105
R109
R103
R203
R202
R502 R503
R108
R107
R102
R104
R303
R302
R204
R126
R124
R123
R112
R539
R540
R537
R530
R311
R532
R534
R535
R538
R306
C109
C113
D103 C104
C110
C132
C111
C107
C103
C105
C102
C106
C130
C202
C203
C209
C208
C205
C133
C302
C518
C516
C505
C524
L301
C305
L501
R511
BCE
BCE
ECB
Q105
Q104
Q301
1
5
6
10
IC201
D102
ECB
TP511
(VT)
Q102
-1
C117
– 12 –
– 14 –
– 13 –
SRF-T615
4-3. PRINTED WIRING BOARDS
Note:
• X
: parts extracted from the component side.
•
r
: Through hole.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
 Caution:
Pattern face side:
Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
Ref. No.
Location
r
  Semiconductor
    Location
D101
G-9
D102
G-8
D103
G-9
D104
D-4
D301
C-5
D501
D-2
D601
C-2
D602
C-2
IC101
F-3
IC201
E-9
IC301
E-3
IC501
C-7
IC502
C-8
IC503
D-7
Q102
G-9
Q103
E-3
Q104
E-8
Q105
E-8
Q201
E-3
Q202
E-3
Q301
E-9
Q503
D-3
Q504
D-3
Q601
C-4
Q602
D-2
Q603
C-1
Q604
C-1
– 15 –
– 17 –
– 16 –
SRF-T615
4-4. SCHEMATIC DIAGRAM
Note:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
Ω
 and 
1
/
4
 
W or less unless otherwise
specified.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 3V 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
<
> : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
r
 WAVEFORMS
1
IC502   
wk
X OUT
2
3
4
VOLT/DIV : 0.5 V AC
TIME/DIV : 5 
µ
sec
T601
Q603 BASE
Q603 COLLECTOR
VOLT/DIV : 2 V AC
TIME/DIV : 0.2 
µ
sec
VOLT/DIV : 50 mV AC
TIME/DIV : 0.1 
µ
sec
VOLT/DIV : 1 V AC
TIME/DIV : 0.1 
µ
sec
1.7 Vp-p
75 kHz
13.2 Vp-p
466 nsec
230 mVp-p
343 nsec
3.5 Vp-p
319 nsec
r
 Refer to page 18 for IC Block Diagrams.
– 18 –
r
 IC BLOCK DIAGRAMS
IC101  CXA1111N
IC201  LA3335M
IC301  CXA1522N
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
FM.IF
DISCRI
TUNING
METER
RIPPLE
FILTER
AM.IF
DET.AGC
BAND SIGNAL
OUTPUT CIRCUIT
REGULATOR
FM.FE
AM.FE
BAND SELECT
AM IF IN
FM IF IN
METER
IF GND
AM IF OUT
AFC/AGC 2
AFC/AGC 1
DET
FILTER
VCC
DETUNE
DET COUNT
FM/AM
 FE OUT
FE GND
FM RF IN
NC
AM RF IN
FM RF
REG
FM OSC
AFC
AM OSC
FM DISCRI
GND
FF   0º
1
2
3
4
5
6
7
8
9
10
FF 1/2
FF   90º
V.C.O
VCO STOP
SYNC
DET
STEREO
SWITCH
PHASE
COMPALATE
LAMP
TRIGGER
DECODER
IN
PLL
VCC
VCO
NC
GND
IND
PLT DET
L OUT
R OUT
REG
VOL
PRE+POWER1
PRE+POWER2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IN1
REG
NF1
VOL
GND1
P-GND1
OUT1
VCC
IN2
NC
NC
NF2
GND2
P-GND2
OUT2
RIPPLE
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