Sony CFD-S27 (serv.man2) Service Manual ▷ View online
– 34 –
CFD-S27
IC704 SM5877AM
EMPH
CKO
DGND
BCK
DATA
DVDD
LRCK
TEST
MUTE
ATTENUATION COUNTER
FILTER PROCESSOR &
ATTENUATION PROCESSOR
NOISE SHAPER
PROCESSOR BLOCK
INPUT INTERFACE
PWN DATA
PRODUCE
BLOCK
TIMING
CONTROL
TO1
AVDD
LO
AGND
RO
AVDD
TO2
XVDD
XI
XO
XGND
HISP
RSTN
MODE
ATCK
L
L
L
R
R
R
1
2
3
4
5
6
7
8
9
10
11
12
15
16
17
18
19
20
24
23
22
21
14
13
– 39 –
– 40 –
– 42 –
– 41 –
CFD-S27
1
IC3
1
r
Waveforms
VOLT/DIV : 0.2 V AC
TIME/DIV : 10
TIME/DIV : 10
µ
sec
2
IC801
&™
VOLT/DIV : 1 V AC
TIME/DIV : 0.1
TIME/DIV : 0.1
µ
sec
3
IC801
#º
VOLT/DIV : 1 V AC
TIME/DIV : 10
TIME/DIV : 10
µ
sec
1.1 Vp-p
75 kHz
4.19 MHz
3.6 Vp-p
4.4 Vp-p
32.768 kHz
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.
no mark : FM (Radio section)
no mark : FM (Radio section)
PLAY (Tape section)
(
) : AM (Radio section)
REC (Tape section)
• Voltages and current are taken with a VOM (Input imped-
ance 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.
F
: FM
E
: PB (L-CH)
d
: PB (R-CH)
a
: REC (L-CH)
G
: REC (R-CH)
J
: CD
5-7. SCHEMATIC DIAGRAM – MAIN SECTION (1/2) – (NEW TYPE)
r
Refer to page 31 for IC Block Diagrams.
– 45 –
– 46 –
– 43 –
– 44 –
CFD-S27
1
IC701
#¡
(RFO)
r
Waveforms
1.0 – 1.4
Vp-p
Vp-p
VOLT/DIV : 200 mV AC
TIME/DIV : 0.5
TIME/DIV : 0.5
µ
sec
4
IC702
#¡
(MNT3)
VOLT/DIV : 1 V AC
TIME/DIV : 50
TIME/DIV : 50
µ
sec
2
IC702
@∞
(XPCK)
VOLT/DIV : 1 V AC
TIME/DIV : 0.1 msec
TIME/DIV : 0.1 msec
5
IC702
#™
(MNT1)
VOLT/DIV : 1 V AC
TIME/DIV : 50
TIME/DIV : 50
µ
sec
3
IC702
@•
(RFCK)
VOLT/DIV : 1 V AC
TIME/DIV : 50
TIME/DIV : 50
µ
sec
6
IC702
#∞
(XTAO)
VOLT/DIV : 0.2 V AC
TIME/DIV : 50 nsec
TIME/DIV : 50 nsec
4.8 Vp-p
242.0
µ
sec
5.3 Vp-p
140.5
µ
sec
5.3 Vp-p
140.5
µ
sec
5.3 Vp-p
140.5
µ
sec
1.1 Vp-p
16.9344 MHz
(PLAY MODE)
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.
•
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 (detuned) 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
r
Refer to page 32 for IC Block Diagrams.
5-8. SCHEMATIC DIAGRAM – MAIN SECTION (2/2) – (NEW TYPE)
– 47 –
SECTION 6
EXPLODED VIEWS
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) ••• (RED)
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
6-1. FRONT CABINET SECTION
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.
1
X-3375-014-1 NET (R) ASSY (BLACK) (EXCEPT AUS)
1
X-3376-201-1 NET (R) ASSY (GREEN) (AEP, UK,AUS)
1
X-3376-203-1 NET (R) ASSY (BLUE) (UK,AUS)
2
X-3375-013-1 NET (L) ASSY (BLACK) (EXCEPT AUS)
2
X-3376-200-1 NET (L) ASSY (GREEN) (AEP, UK,AUS)
2
X-3376-202-1 NET (L) ASSY (BLUE) (UK,AUS)
3
X-3375-015-1 CABINET (FRONT) ASSY (EXCEPT AUS)
3
X-3376-354-1 CABINET (FRONT) ASSY (AUS)
4
4-951-620-01 SCREW (2.6X8), +BVTP
* 5
1-665-045-11 SW BOARD
6
3-009-228-11 WINDOW, INDICATION
C851
1-162-199-31 CERAMIC
10PF
5%
50V
SP901
1-505-531-11 SPEAKER (10cm) (L-CH)
SP902
1-505-531-11 SPEAKER (10cm) (R-CH)
#1
#1
#1
#8
#8
#8
#1
#1
#8
#8
#1
SP901
SP902
1
2
3
4
4
5
6
C851
• Abbreviation
AUS
: Australian
EE
: East European
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