Sony ICF-CD831 / ICF-CD831L Service Manual ▷ View online
ICF-CD831/CD831L
17
17
MAIN BOARD (1/2)
20
CF1
24
23
21
12
8
7
4
14
FM
DET
AM
OSC
AM
MIX
FM
OSC
FM
MIX
AM
DET
VREG
ICF-CD831L (3-BAND: AEP, UK MODEL)
ICF-CD831 (2-BAND: CND, AUS, IT, MX, CET MODEL)
Q2
LPF2
VREG
CF2
IT MODEL
AEP MODEL
AM OSC
L2
L5
CT2
CV1-2
L3
CT3
CV1-3
VREG
MIX
OUT
MPX
IN
T1 AM IFT
T2
FM DET
IC1
FM/MW/LW FRONTEND
IF AMP,DET
LOUT
ROUT
DET
OUT
VREG
VREG
VREG
VREG
VREG
AM
IF
IN
IF
IN
FM
IF
IN
IF
IN
FM
RF
IN
RF
IN
AM RF IN
FM RF OUT
FM OSC
AF
ST/MO
FM/AM
TU-R
TU-L
A
13
DECODE
18
17
16
19
ANT1
(FM)
L1
MW/LW ANT
S1-1
BAND SW
1
S1-2
BAND SW
T1
MW IF
T2
FM IF
T1
AM IF
T2
FM IF
CT1,L1-1
MW
TRACKING
CT1,L1
AM
TRACKING
CT6,L1-2
LW
TRACKING
CT2,L2
FM
TRACKING
CT5,L3
LW
FREQUENCY
COVERAGE
CT4,L4
AM
FREQUENCY
COVERAGE
CT3,L5
FM
FREQUENCY
COVERAGE
CT2,L2
FM
TRACKING
CT3,L5
FM
FREQUENCY
COVERAGE
CT4,L4
MW
FREQUENCY
COVERAGE
BPF1
FM
L1-2
L1-1
CT1
CV1-1
CT6
CT5
CT4
CV1-4
L4
MW
LW
FM
MW
LW
MAIN BOARD (1/2)
20
CF1
24
23
21
12
8
7
4
14
FM
DET
AM
OSC
AM
MIX
FM
OSC
FM
MIX
AM
DET
LPF2
VREG
CF2
AM OSC
L2
CT2
CV1-2
L5
CT3
CV1-3
VREG
MIX
OUT
MPX
IN
T1 AM IFT
T2
FM DET
IC1
FM/AM FRONTEND
IF AMP,DET
LOUT
ROUT
DET
OUT
VREG
VREG
VREG
AM
IF
IN
IF
IN
FM
IF
IN
IF
IN
FM
RF
IN
RF
IN
AMRF IN
FM RF OUT
FM OSC
AF
ST/MO
FM/AM
TU-R
TU-L
A
13
DECODE
18
17
16
19
ANT1
(FM)
1
S1
BAND SW
BPF1
CT4
CV1-4
L4
MW FM
VREG
CV1-1
CT1
L1
AM ANT
• Signal path
: FM
: AM
• Abbreviation
CND : Canadian model
AUS : Australian model
IT
AUS : Australian model
IT
: Italian model
MX
: Mexican model
CET : East European & CIS model
5-4. BLOCK DIAGRAM — TUNER SECTION —
(Page 18)
(Page 18)
Ver 1.2
ICF-CD831/CD831L
18
18
• Signal path
: CD
: FM
: AM
• R-ch is omitted due to
Same as L-ch
• Abbreviation
CND : Canadian model
MX : Mexican model
MX : Mexican model
5
4
1
2
54
53
55
56
58
58
57
50
50
39
59
52
37
I
30
SEG0
I
SEG12
SEG1
I
SEG13
68
I
64
60
61
63
62
51
18
14
15
16
17
49
77
78
76
1
3
7
1
11
40
79
80
42
44
75
43
45
46
X402
4.19MHz
CN301
SP101
SP201
R-CH
+3.9V
CN302
CN901
CH901
4
3
L
IN
IN
L
OUT
2
1
4
3
2
1
5
4
1
2
FREQ.
CHECK
+3.9V
REG
+3.9V
Q1
Q904
Q551
Q601
Q602
Q901
F901
T901
JW901
JW901 : CND, MX MODEL
F901 : EXCEPT CND, MX MODEL
Q902,903
+6V
CD+B
+11V
6V
REG
LED
DRIVE
LED
DRIVE
SOFT
START
LED
DRIVE
LED
DRIVE
LED
DRIVE
+B
SWITCH
+B
SWITCH
Q401
S401
CN601
MUTE
DRIVE
Q301
Q403
+B
SWITCH
+B
SWITCH
+B
SWITCH
Q401
Q516
Q514
Q517
Q515
Q501-513
AMP
Q102
AMP
Q101
Q103
IC401
SYSTEM CONTROL
IC402
RESET
3
4
6
10
8
7
5
5
1
3
4
5
7
6
2
1
CD+B
+6V
R-CH
R-CH
TU-R
TU-L
DATA
A MUT
BUZZER
POWER ON
BRIGHTNESS
SEG13
SEG14
50/60Hz
RESET
AC IN
RADIO ON
CD ON
VREF
CN501
DATA IN CD
CLK
LAT
XRST
XRST
DRF
WRQ
FSEQ
SEG14
SEG15
SEG16
COM1
COM2
CD OPEN
KEY1
X2
74 X1
+3.9V
71
X401
32KHz
XT2
70 XT1
SW2
SW0
SW1
CD/RADIO
NAP LED
KEY0
11
9
12
13
1
I
13
S653
CLOCK/TRACK
S602
RADIO ON
S604
TIME SET -
S606
SNOOZE/
SLEEP OFF
S607
ALARM
SET A
S610
ALARM
SET B
S603
CD
S601
OFF
VR301
VOLUME
S605
SLEEP
S608
NAP
S609
TIME SET +
D601
CD/RADIO
D602
NAP
S652
BRIGHTNESS
S612
ALARM B-MODE
S651
CD PLAY MODE
CD – RADIO – BUZZER – OFF
S611
ALARM A-MODE
CD – RADIO – BUZZER – OFF
NORMAL
I
REPEAT
I
SHUFFLE
I
SHUFFLE REPEAT
CD BOARD
CNP702
STBY
IN AMP
OUT AMP
IC301
POWER AMP
AC IN
LED501
CLOCK DISPLAY
A
MAIN BOARD (2/2)
KEY(B) BOARD
KEY(A) BOARD
DRIVE BOARD
TRANSFORMER BOARD
Z
PUSH
OPEN/CLOSE
B
5-5. BLOCK DIAGRAM — MAIN SECTION —
(Page 16)
(Page 17)
Ver 1.2
ICF-CD831/CD831L
19
19
5-6. PRINTED WIRING BOARD — CD SECTION — • Refer to page 15 for Circuit Boards Location.
1
A
B
C
D
E
F
G
2
3
4
5
6
7
M
M
OPTICAL
PICK-UP
BLOCK
(KSS-213R)
C N 5 0 1
1
15
10
2
16
M701
SPINDLE
MOTOR
M702
SLED
MOTOR
IC701
Q701
IC702
C729
C730
R730
R728
R729
C704
R708
C728
R724
R722
R725
R726
R707
C701
C726
C723
C725
C724
R719
R717
R718
R716
C720
C721
C722
R731
R721
R720
C716
R715
R714
1-684-506-
(11)
11
C727
C711
C709
FB701
C736
C734
R709
C705
R704
R702
R711
R710
R703
R705
R701
C703
C731
R706
R727
R712
R723
C708
R741
JC701
R744
R743
C751
JC702
JC703
C743
C744
C745
C742
C754
C755
C741
JC704
C707
L706
C717
C739
C738
TP
(VREF)
TP
(TE)
TP
(FE)
TP
(RF)
TP
(R-CH)
TP
(L-CH)
R732
S701
(LIMIT)
C732
CNP701
X701
CNP702
C702
JW701
JW702
JW703
JW705
TY
FY
TX
FX
JW706
JW707
JW708
JW709
JW713
JW714
JW715
JW716
JW717
JW718
JW721
JW722
JW723
JW724
JW725
JW726
JW727
JW728
JW729
C740
C750
C746
C747
JW719
C735
JW720
JW711
C733
C706
JW712
JW710
ICF-CD831
(Page 22)
ICF-CD831L
(Page 23)
Ver 1.2
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
Common Note on Schematic Diagrams:
• 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.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• 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.
F
: FM
f
: AM
J
: CD
• Abbreviation
CND : Canadian model.
IT
IT
: Italian model.
AUS
: Australian model.
MX
: Mexican model.
CET
: East European & CIS model.
Common Note on Printed Wiring Boards:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
• Abbreviation
CND : Canadian model.
IT
IT
: Italian model.
AUS
: Australian model.
MX
: Mexican model.
CET
: East European & CIS model.
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
ICF-CD831/CD831L
20
20
5-7. SCHEMATIC DIAGRAM — CD SECTION — • Refer to page 19 for Common Note on Schematic Diagrams and page 28 for IC Block Diagrams.
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : CD PLAY
no mark : CD PLAY
IC B/D
IC B/D
C745
R707
CNP701
R701
R702
R703
R704
R705
R706
R702
R703
R704
R705
R706
R712
C751
M702
M701
R744
R743
C741
C733
C732
R724
R709 R710
C703
C704
C704
R711
C743
C731
R708
C708
C742
R741
C740
C709
R726
C729
R731
R720
R719
R722
R727
R728
C744
R730
R729
C724
C720
C722
C723
C722
C723
C721
R717
R716
R718
R721
R716
R718
R721
FB701
C717
C735
R715
R714
R723
C728
R725
C702
S701
C730
CNP702
C707
C706
TP
TP
C711
L706
C750
C747
C746
C701
C739
IC702
JC702
JC701
C738
C705
C734
C736
JC703
C727
C726
C726
C725
R732
C755
C754
IC701
X701
C716
Q701
JC704
(Page 21)
1
IC701
4
(RF)
500mV/div 0.5µsec/div
2
IC701
qd
(FE)
100mV/div 20µsec/div
3
IC701
qg
(TE)
100mV/div 20µsec/div
4
IC701
rk
(XOUT)
1V/div 0.05µsec/div
0.85±0.2Vp-p
Approx. 100mVp-p
Approx. 100mVp-p
1.8V
1.8V
3.2Vp-p
• Waveforms
(Mode: PLAY)
16.93MHz
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