Sony CFD-V14 Service Manual ▷ View online
– 13 –
– 14 –
– 16 –
– 15 –
• Signal path.
F
: FM
E
: PB
a
: REC
J
: CD
CFD-V14
6-2. BLOCK DIAGRAM
r
CIRCUIT BOARDS LOCATION
AC INLET board
REC SW board
BATT board
MONO/ST SW board
CD MOTOR board
POWER board
CONTROL board
MAIN board
– 21 –
– 22 –
– 24 –
– 23 –
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
2
: nonflammable resistor.
•
¢
: internal component.
Note: The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
•
U
: B+ Line.
• Power voltage is dc 9V 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 (RADIO SECTION)
no mark : FM (RADIO SECTION)
CD STOP (CD SECTION)
PLAY (TAPE SECTION)
PLAY (TAPE SECTION)
(
) : AM (RADIO SECTION)
REC (TAPE SECTION)
• 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
E
: PB
a
: REC
J
: CD
•
Abbreviation
IT
IT
: Italian
EE
: East European
CIS
: Russian
6-4. SCHEMATIC DIAGRAM (MAIN SECTION)
r
Refer to page 29 for IC Block Diagrams.
CFD-V14
– 27 –
– 28
–
– 25 –
– 26 –
CFD-V14
6-5. SCHEMATIC DIAGRAM (CD SECTION)
r
Refer to page 30 for IC Block Diagrams.
Note:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
Note: The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
•
U
: B+ Line.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD STOP
no mark : CD STOP
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
J
: CD
1
IC701
#£
(RFO)
r
WAVEFORMS
VOLT/DIV : 0.2V AC
TIME/DIV : 0.5
TIME/DIV : 0.5
µ
sec
4
IC702
$§
(MNT3)
VOLT/DIV : 1V AC
TIME/DIV : 50
TIME/DIV : 50
µ
sec
2
IC702
#ª
(XPCK)
VOLT/DIV : 1V AC
TIME/DIV : 0.1
TIME/DIV : 0.1
µ
sec
5
IC702
$¶
(MNT1)
VOLT/DIV : 1V AC
TIME/DIV : 50
TIME/DIV : 50
µ
sec
3
IC702
$¡
(RFCK)
VOLT/DIV : 1V AC
TIME/DIV : 50nsec
TIME/DIV : 50nsec
6
IC702
`⁄‚›
(XTAO)
VOLT/DIV : 0.5V AC
TIME/DIV : 20nsec
TIME/DIV : 20nsec
1.0 – 1.4
Vp-p
Vp-p
5Vp-p
484nsec
5Vp-p
237nsec
4.8Vp-p
140.5
µ
sec
4.9Vp-p
140.5
µ
sec
2.5Vp-p
16.9344 MHz
PLAY MODE
– 29 –
IC301 TA2068N
r
IC BLOCK DIAGRAMS (MAIN SECTION)
IC1 CAX1538S
REG
FM FRONT-END
AM FRONT-END
VCO
REG
MPX REG.
PD 1
PD 2
MONO/ST
SELECT
SELECT
1/2
COUNTER
1/2
COUNTER
MUTING
DECORD AMP
AUTOBLEND
RIPPLE
FILTER
BAND PASS
MUTE
TUNING
INDICATOR
AM
IF / DET
GND
PLL LPF 1
PILOT DET
LPF 1
PILOT DET
LPF 2
ST IND/
VCO CHECK
RCH OUT
LCH OUT
VCC
RIPPLE
FILTER
AFC/AGC 1
AFC/AGC 2
GND
TUND IND
FM IF IN
AM IF IN
BAND SELECT
PLL LPF2
MPX REG
VCO
FM
DISCRI
MUTE
AM OSC
AFC
FM OSC
REG OUT
FM RF
AM RF IN
FM RF IN
FM/AM
FE OUT
FE GND
2
3
5
4
6
7
8
9
10
1
11
12
13
14 15
16
17
18
19
20
30
29
28
27
26
25 24 23 22
21
FM IF /
DISCRI
21
22
23
24
2
3
5
4
6
7
8
9
10
1
11
12
13
14
15
16
17
18
19
20
LOGIC
7dB
26dB
26dB
7dB
ALC1
ALC2
DET
MIC
AMP1
1k
10k
NAB
AMP2
NAB
AMP1
ON
MUTE
MUTE
MUTE
BUF AMP
A2
BUF AMP
A1
BUF AMP
B1
BUF AMP
B2
TAPE
TAPE
–––––
TAPE
–––––
LINE
RADIO
10k
10k
10k
1k
1k
10k
10k
10k
10k
10k
10k
10k
10k
10k
10k
15k
6k
1k
6k
LINE
RADOI
TAPE
REC
AMP1
REC
AMP2
REF AMP
2.1
ON
ON
MONITOR
AMP
MONITOR
AMP
LIN
MIC
I/EX
L. RAD
L. LO
REC
TAPE
R. LIN
MIC
IN
R. LO
LINE
R. RAD
VCC
MIC
NF
R. PO
R. NF
R. RO
R. IN
GND
REF
L. IN
L. RO
L. NF
L. PO
AGC
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