Sony CFD-V37 Service Manual ▷ View online
CFD-V37
5-5.
SCHEMATIC DIAGRAM — TUNER/SYSTEM SECTION —
Note:
• 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.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 9 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground un-
der no-signal (detuned) conditions.
no mark : CD PLAY
(
no mark : CD PLAY
(
) : FM
[
] : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
• Signal path.
• Signal path.
F
: FM
f
: AM
• Abbreviation
E4
: 220V – 240V AC area
EA
: Saudi Arabia
E92
: 120V AV area
• Waveform
1
IC501
#¡
2
IC501
&¢
4.0Vp-p
4.5Vp-p
4.0MHz
500kHz
1.0V/div
0.1
0.1
µ
sec/div
1.0V/div
1.0
1.0
µ
sec/div
E92 MODEL
L2, CT1(2/4)
L1,CT1(1/4)
FM FREQUENCY
COVERAGE
L4,CT1(4/4)
E4,EA MODEL:4.7p
E92 MODEL:3.3K
FM FREQUENCY
COVERAGE
27p
FM TRACKING
220
C1 47p
E92 MODEL
E4,EA MODEL
E92 MODEL
470
L3,CT1(3/4)
AM TRACKING
AM
Mark:
Ref.No.
E4 MODEL
E92 MODEL
EA MODEL
C7
C8
C18,19
R5
5.6p
5.6p
6.8p
3.3p
1.5p
3.3p
0.01
0.015
0.01
330
470
330
SWITCH
28
28
32
— 23 —
— 24 —
— 25 —
— 26 —
• Refer to page 34 for IC Block Diagrams.
CFD-V37
5-6.
SCHEMATIC DIAGRAM — POWER SECTION —
Note:
• 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.
•
U
: B+ Line.
• Power voltage is dc 9 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground un-
der no-signal (detuned) conditions.
no mark : CD PLAY
(
no mark : CD PLAY
(
) : TAPE PLAY
[
] : TAPE REC
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
• Signal path.
• Signal path.
F
: FM
E
: PB
a
: REC
J
: CD
• Waveform
3
T301 REC
40Vp-p
52.75kHz
10V/div
10
10
µ
sec/div
Note: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
32
23
23
E4,EA MODEL
E4,EA MODEL
E4,EA MODEL
E92 MODEL
E92 MODEL
F902
2.5A:E4,EA MODEL
3.15A:E92 MODEL
250V
POWER TRANSFORMER
— 27 —
— 28 —
— 29 —
— 30 —
CFD-V37
5-7.
SCHEMATIC DIAGRAM — CD SECTION —
5-8.
IC BLOCK DIAGRAMS
–
+
+
–
–
+
+
1
2
3
4
5
6
7
8
9
10
20
19
17
16
15
14
13
12
11
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
52
51
50
49
48
47
+
–
+
–
+
–
+
–
–
+
–
+
–
+
+
–
+
–
+
–
+
–
–
–
+
+
–
–
+
–
+
+
–
+
–
–
+
–
–
+
–
+
–
+
–
–
+
–
+
–
+
–
+
+
–
+
–
–
+
+
–
–
+
–
+
+
–
–
18
–
+
–
+
–
+
+
–
+
–
–
+
Charge
up
up
FEO
FEI
FDFCT
FGD
FLB
FE_O
FE_M
SRCH
TGU
TG2
FSET
TA_M
TA_O
SL_P
SL_M
SL_O
ISET
VCC
VCC
LOCK
CLK
XLT
DATA
XRST
C. OUT
SENS1
SENS2
FOK
CC2
CC1
CB
CP
RF_I
RF_O
RF_M
RFTC
LD
PD
PD1
PD2
FE_BIAS
F
E
EI
VEE
TEO
LPFI
TEI
ATSC
TZC
VC
FZC
TM2
VEE
VEE
TM3
TM5
TM4
TM6
VCC
VCC
TM7
ISET
TTL
↓
IIL
IIL
↓
TTL
IIL
↓
TTL
IIL DATA REGISTER
INPUT SHIFT REGISTER
ADDRESS DECODER
SENS SELECTOR
OUTPUT DECODER
INPUT SHIFT REGISTER
ADDRESS DECODER
SENS SELECTOR
OUTPUT DECODER
DFCTO
IFB1-6
BAL1-4
TOG1-4
BAL1-4
TOG1-4
FS1-4
TG1-2
TM1-7
PS1-4
FOH
FOL
TGH
TGL
TGL
BALH
BALL
ATSC
BALL
ATSC
TZC
FZC
FZC
FSET
TG2
VEE
VCC
FS1
FS2
FOCUS
PHASE COMPENSATION
PHASE COMPENSATION
DFCT
FS4
TRACKING
PHASE COMPENSATION
PHASE COMPENSATION
TG1
TM1
DFCT
FZC COMP.
VEE
VCC
VCC
TDFCT
TZC COMP.
ATSC
WINDOW
COMP.
WINDOW
COMP.
E-F BALANCE
WINDOW COMP.
WINDOW COMP.
TRK. GAIN
WINDOW COMP.
WINDOW COMP.
FO. BIAS
WINDOW
COMP.
WINDOW
COMP.
VEE
TGFL
TOG1
TOG2
TOG3
TOG4
BAL1
BAL2
BAL3
BAL4
IFB1
IFB2
IFB3
IFB4
IFB5
IFB6
FE AMP
VEE
E IV AMP
F IV AMP
VCC
APC
VCC
VEE
LASER POWER CONTROL
VEE
PD1 IV
AMP
AMP
PD2 IV
AMP
AMP
RF SUMMING
AMP
AMP
VCC
VEE
VEE
LEVEL S
LEVEL S
VEE
MIRR
VCC
DFCT
FOK
VCC
LDON
LPCL
LPC
TGFL
MIRR
DFCT1
CC1
30
29
4
5
6
7
8
9
10
11
12
13 14 15
3
2
1
28 27
26 25 24 23 22 21
20
19
18
17
16
REG
FM FRONT-END
AM FRONT-END
VCO
MPX REG.
1/2
COUNTER
1/2
COUNTER
PD1
PD2
MUTING
DECODER AMP
MONO/ST
SELECT
RIPPLE
FILTER
AUTOBLEND
BAND PASS
MUTE
TUNING
INDICATOR
FM IF/
DISCRI
AM
IF/DET
GND
PLL LPF2
MPX REG
VCO
FM
DISCRI
MUTE
AM OSC
AFC
FM OSC
REG
FM RF
AM RF IN
FM RF IN
BAND SELECT
AM IF IN
FM IF IN
TUNE IND
GND
VCC
L CH OUT
R CH OUT
ST IND/
VCO CHECK
PILOT DET LPF2
PILOT DET LPF2
PLL LPF1
AGC AFC2
AGC AFC1
RIPPLE
FIL
TER
FM GND
FM/AM
FE OUT
IC1
CXA12138S
IC701
CXA1992BR
Note:
• 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.
•
U
: B+ Line.
• Power voltage is dc 9 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground un-
der no-signal (detuned) conditions.
no mark : CD PLAY
no mark : CD PLAY
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Circled numbers refer to waveforms.
• Signal path.
J
: CD
• Waveform
4
IC703
&¡
5
IC703
#∞
3.5Vp-p
1.2
±
0.2Vp-p
16.9344MHz
1.0V/div
50nsec/div
50nsec/div
0.2V/div
0.5
0.5
µ
sec/div
Note: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
PD
LD
28
24
— 31 —
— 32 —
— 33 —
— 34 —
• Refer to page 34 for IC Block Diagrams.
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