Sony CFD-V20 (serv.man4) Service Manual ▷ View online
– 9 –
– 10 –
– 12 –
– 11 –
IC1 CXA1238S
r
IC BLOCK DIAGRAM – MAIN SECTION –
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
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.
•
¢
: internal component.
•
1
: fusible resistor.
Note:
Note:
The components identi-
Les composants identifiés
fied by mark
!
or dotted par une marque
!
sont cri-
line with mark
!
are cri-
tiques pour la sécurité.
tical for safety.
Ne les remplacer que par
Replace only with part
une piéce portant le
number specified.
numéro spécifié.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• Voltages are dc with respect to ground under no-signal
(detuned) conditions.
no mark : FM (Radio section), CD STOP (CD section)
no mark : FM (Radio section), CD STOP (CD 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
CFD-V20
r
SCHEMATIC DIAGRAM – MAIN SECTION –
– 15 –
– 16 –
– 13 –
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CFD-V20
r
SCHEMATIC DIAGRAM – CD SECTION –
r
Refer to page 2 for IC Block Diagrams.
1
IC701
#¡
(RFO)
r
WAVEFORMS
1.2
±
0.2
Vp-p
VOLT/DIV : 200mV 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
@∞
(XPCK)
VOLT/DIV : 1V AC
TIME/DIV : 0.1msec
TIME/DIV : 0.1msec
5
IC702
#™
(MNT1)
VOLT/DIV : 1V AC
TIME/DIV : 50
TIME/DIV : 50
µ
sec
3
IC702
@•
(RFCK)
VOLT/DIV : 1V AC
TIME/DIV : 50
TIME/DIV : 50
µ
sec
6
IC702
#∞
(XTAO)
VOLT/DIV : 0.2V AC
TIME/DIV : 50nsec
TIME/DIV : 50nsec
4.8Vp-p
242.0
µ
sec
5.3 Vp-p
140.5
µ
sec
5.3Vp-p
140.5
µ
sec
5.3 Vp-p
140.5
µ
sec
0.8 Vp-p
16.9344 MHz
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:
Note:
The components identi-
Les composants identifiés
fied by mark
!
or dotted par une marque
!
sont cri-
line with mark
!
are cri-
tiques pour la sécurité.
tical for safety.
Ne les remplacer que par
Replace only with part
une piéce portant le
number specified.
numéro spécifié.
•
U
: B+ Line.
•
H
: adjustment for repair.
• 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 : FM (Radio section), CD STOP (CD section)
no mark : FM (Radio section), CD STOP (CD 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.
• 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
– 17 –
NOTE :
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
one.
• Color indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE)
KNOB, BALANCE (WHITE)
• • •
(RED)
↑
↑
Parts color Cabinet's color
• Items marked “ * ”are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference
number in the exploded views are not
supplied.
supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
parts list.
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
8-1. FRONT CABINET SECTION
• Abbreviation
CND : Canadian
Les composants identifiés par une
marque
marque
! sont critiques pour la sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
portant le numéro spécifié.
The components identified by mark
!
or dotted line with mark
! are critical
for safety.
Replace only with part number specified.
Replace only with part number specified.
r
EXPLODED VIEWS
(Service Manual See page 33 to 38)
1
X-3373-390-1 CABINET (FRONT) SUB ASSY
• • •
(BLACK) (US)
1
X-3373-934-1 CABINET (FRONT) SUB ASSY
• • •
(WHITE) (US)
1
X-3373-936-1 CABINET (FRONT) SUB ASSY
• • •
(BLACK)
(CND)
2
3-009-193-01 KNOB (VOL)
• • •
(BLACK)
2
3-009-193-11 KNOB (VOL)
• • •
(WHITE) (US)
3
3-012-689-01 WINDOW, TU
• • •
(BLACK)
3
3-012-689-51 WINDOW, TU
• • •
(WHITE) (US)
4
3-009-191-01 POINTER
5
3-009-190-01 KNOB (TU)
* 6
3-009-189-01 CHASSIS, TU
* 7
1-665-554-13 SW BOARD
8
4-951-620-01 SCREW (2.6X8), +BVTP
9
3-009-216-01 KNOB (MEGA BASS)
* 10
1-665-564-13 M/B SW BOARD
11
3-703-397-11 STOPPER, WIRING
12
3-014-933-01 SHEET (B), ADHESIVE
LCD801 1-801-639-11 LCD
SP901
SP901
1-505-531-11 SPEAKER (10cm) (L-CH)
SP902
1-505-531-11 SPEAKER (10cm) (R-CH)
#6
#6
#6
#6
#6
#1
#1
#1
#1
#1
SP902
LCD801
SP901
1
2
3
4
5
6
7
8
8
9 10
not
supplied
supplied
11
12
– 18 –
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
8-2. UPPER CABINET SECTION
51
3-009-208-01 SPRING, CASSETTE UP
52
3-922-112-11 DAMPER
53
3-009-186-01 CABINET (UPPER)
• • •
(BLACK)
53
3-009-186-21 CABINET (UPPER)
• • •
(WHITE) (US)
54
3-009-209-01 SPRING, CD UP
55
3-923-498-01 PLATE, CHUCK
56
1-452-899-11 MAGNET
57
3-009-187-01 LID, CD
• • •
(BLACK)
57
3-009-187-21 LID, CD
• • •
(WHITE) (US)
58
X-3373-389-1 HOLDER SUB ASSY, CASSETTE
• • •
(BLACK)
58
X-3373-974-1 HOLDER SUB ASSY, CASSETTE
• • •
(WHITE)
(US)
59
3-009-196-01 BUTTON (REC)
• • •
(BLACK)
59
3-009-196-11 BUTTON (REC)
• • •
(WHITE) (US)
60
3-009-199-01 BUTTON (PLAY)
• • •
(BLACK)
60
3-009-199-11 BUTTON (PLAY)
• • •
(WHITE) (US)
61
3-009-198-01 BUTTON (REW)
• • •
(BLACK)
61
3-009-198-11 BUTTON (REW)
• • •
(WHITE) (US)
62
3-009-197-01 BUTTON (FF)
• • •
(BLACK)
62
3-009-197-11 BUTTON (FF)
• • •
(WHITE) (US)
63
3-009-200-01 BUTTON (STOP)
• • •
(BLACK)
63
3-009-200-11 BUTTON (STOP)
• • •
(WHITE) (US)
64
3-009-195-01 BUTTON (PAUSE)
• • •
(BLACK)
64
3-009-195-11 BUTTON (PAUSE)
• • •
(WHITE) (US)
* 65
3-009-206-01 SHAFT (MD)
66
3-009-214-01 SPRING, REC
67
4-951-620-01 SCREW (2.6X8), +BVTP
* 68
1-665-562-13 REC SW BOARD
69
3-009-201-01 HANDLE
• • •
(BLACK)
69
3-009-201-11 HANDLE
• • •
(WHITE) (US)
70
3-923-736-01 COVER, CD
71
3-910-095-01 RUBBER, VIBRATION PROOF (RED)
72
3-910-095-11 RUBBER, VIBRATION PROOF (GREEN)
73
1-777-955-11 WIRE, PARALLEL (16 CORE)
* 74
1-639-678-12 CD MOTOR BOARD
75
3-923-151-01 CUSHION, RUBBER
76
7-623-957-11 SPACER (PICK)
77
3-015-646-01 CUSHION (CD)
• • •
(BLACK)
77
3-015-646-11 CUSHION (CD)
• • •
(WHITE) (US)
S871
1-692-960-11 SWITCH, PUSH (1 KEY) (OPEN/CLOSE)
#1
#1
#1
#1
#2
#1
#1
S871
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
72
73
74
77
75
76
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