Sony ICF-CD830 / ICF-CD830L Service Manual ▷ View online
9
ICF-CD830/CD830L
SECTION 4
ELECTRICAL ADJUSTMENTS
FM VCO Adjustment
Procedure:
FM RF signal
generator
generator
Carrier frequency: 98 MHz
Modulation: no modulation
Output level: 0.1 V (100 dB)
Modulation: no modulation
Output level: 0.1 V (100 dB)
0.01
µ
F
FM lead wire antenna terminal
Connection:
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
455 kHz
AM FREQUENCY COVERAGE ADJUSTMENT (CD830)
Adjust for a maximum reading on level meter
L4
515 kHz (516.5 kHz)
CT4
1,750 kHz (1,631.5 kHz)
AM TRACKING ADJUSTMENT (CD830)
Adjust for a maximum reading on level meter
L1
600 kHz
CT1
1,400 kHz
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L3
86.5 MHz (87.35 MHz)
CT3
109.5 MHz (108.25 MHz)
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2
86.5 MHz (87.35 MHz)
CT2
109.5 MHz (108.25 MHz)
PRECAUTION
• Adjustment should be performed in the order given.
[FM]
Setting:
Function switch : RADIO
BAND switch
Function switch : RADIO
BAND switch
: FM
[AM (MW/LW) ]
Setting:
Function switch : RADIO
BAND switch
Function switch : RADIO
BAND switch
: AM (MW/LW)
AM RF signal
generator
generator
30% amplitude modulation by
400 Hz signal.
Output level: as low as possible
400 Hz signal.
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
FM RF signal
generator
generator
75 kHz frequency deviation
by 1 kHz signal.
Output level: as low as possible
by 1 kHz signal.
Output level: as low as possible
0.01
µ
F
FM lead wire antenna terminal
TUNER SECTION
0 dB=1 µV
Frequency counter
75,950 – 76,050 Hz
IC1 Pin
4
+
–
–
frequency counter
33 k
Ω
MAIN Board
IC1 Pin
7
LW FREQUENCY COVERAGE ADJUSTMENT (CD830L)
Adjust for a maximum reading on level meter
CT6
145 kHz
LW TRACKING ADJUSTMENT (CD830L)
Adjust for a maximum reading on level meter
L1-2
160 kHz
CT5
240 kHz
1. Connect the frequency counter to 4 and 7 pins of IC1 as shown
the figure right.
2. Tune the set to 98 MHz.
3. Adjust RV1 for 76 kHz reading on frequency counter.
3. Adjust RV1 for 76 kHz reading on frequency counter.
Specification Value:
MW FREQUENCY COVERAGE ADJUSTMENT (CD830L)
Adjust for a maximum reading on level meter
L4
515 kHz
CT4
1,750 kHz
MW TRACKING ADJUSTMENT (CD830L)
Adjust for a maximum reading on level meter
L1-1
600 kHz
CT1
1,400 kHz
level meter
set
SPEAKER OUT
4
Ω
+
–
–
( ) : AEP Model
Adjustment Location:
[MAIN BOARD] (Component Side)
L3
T1
AM IF
Adjustment
AM IF
Adjustment
CT3
CT2
L2
FM Traking
Adjustment
FM Traking
Adjustment
L3
FM Frequency
Coverage
Adjustment
FM Frequency
Coverage
Adjustment
L4
CT4
AM Frequency
Coverage Adjustment
MW Frequency
Coverage Adjustment
AM Frequency
Coverage Adjustment
MW Frequency
Coverage Adjustment
CT6
LW Frequency
Coverage
Adjustment
LW Frequency
Coverage
Adjustment
L1, L1-1
AM Tracking Adjustment
MW Tracking Adjustment
AM Tracking Adjustment
MW Tracking Adjustment
CT5
LW Traking Adjustment
LW Traking Adjustment
L1-2
LW Traking Adjustment
LW Traking Adjustment
CT1
AM Tracking Adjustment
MW Tracking Adjustment
AM Tracking Adjustment
MW Tracking Adjustment
10
ICF-CD830/CD830L
SECTION 5
DIAGRAMS
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
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.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
C
: panel designation.
•
H
: adjustment for repair.
•
A
: B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
( ) : AM (MW/LW)
<
( ) : AM (MW/LW)
<
> : CD
• 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
f
: AM (MW/LW)
J
: CD
• Abbreviation
AUS
: Australian model
CND : Canadian model
IT
IT
: Italian model
SP
: Singapore model
Note:
The components identi-
fied by mark
The components identi-
fied by mark
!
or dotted
line with mark
!
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
!
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.
5-1. CIRCUIT BOARDS LOCATION
• Waveforms
0.2 V/DIV, 500 ns/DIV
1.0 V/DIV, 20
m
s/DIV
2.0 V/DIV, 40 ns/DIV
1
IC401
ud
(XT1)
2
IC501
ed
(RF0)
(PLAY MODE)
3
IC551
ua
(XTA0)
3.4 Vp-p
31 ms
0.9 – 1.3 Vp-p
5.6 Vp-p
59 ns
MAIN board
LED board
TRANSFORMER board
MOTOR (6P) board
KEY board
11
11
ICF-CD830/CD830L
5-2. BLOCK DIAGRAM (CD830)
: AM
: FM
: CD
• Signal Path
SYSTEM CONTROL
IC401
OPTICAL PICK-UP
BLOCK
(KSS-213C)
A
B
C
D
E
F
LD
VC
+5V
GND
PD
VR
LD
DRIVE
FOCUS
COIL
TRACKING
COIL
Q501
RF AMP
IC501
VC
51
PD1
38
PD2
39
E
42
F
41
LD
36
PD
37
MOTOR/COIL DRIVE
IC591
F+
26
F-
27
T+
17
T-
18
SL+
2
SL-
1
M
SLED
MOTOR
SP+
12
SP-
11
M
SPINDLE
MOTOR
F+
F-
T+
T-
25
19
3
SLO
16
TAO
13
FEO
6
DIGITAL SIGNAL PROC.
D/A CONV.
IC551
DIGITAL SERVO
RF
35
32
RFI
33
RFO
DATA
20
CLK
23
XRST
DATO
12
CLKO
14
67
L OUT1
74
L OUT2
7
DATA
9
CLK
8
XLAT
4
SQCK
57
SCOR
5
SQSO
71
XTAI
72
XTAO
17
XLON MUTE
X551
16.9344MHz
C DATA
56
C CLOCK
54
C LATCH
55
C SQCK
62
C SQSO
61
C SENS
50
6
SENS
C MUTE
63
13
14
FM IF
AM IF
FM/AM
FRONT- END
15 BAND
C SCOR
52
SL IN
T IN
F IN
MAIN BOARD
ANT1
18
20
22
19
24
FM RF IN
FM RF OUT
FM OSC
AM RF
AM OSC
BPF1
B.P.F
3
1
IC1
CF3
10.7MHz
T1
AM IFT
MUTE
Q151
MUTE
CONT
Q351
Q351
S401
DOOR SW
22
21
XLT
XLTO
13
27
FOK
FOK
18
24
COUT
CIN
11
25
SENS1
SEIN
10
26
SENS2
76
A OUT2
65
A OUT1
SPOA(LIMIT)
15
62
SMUTE
RADIO ON
80
C SENS2
51
C RST
64
21 REG
L1
AM FERRITE-ROD
ANTENNA
L2
FM RF
CT2
CV1-2
CV1-1
CV1-4
L3
FM OSC
CT3
CT1
CT4
CV1-3
L4
AM OSC
RESET
IC402
16
MIX OUT
CF2
455kHz
26
DISCRI
27
VCO
CF1
S1
FM
AM
RV1
6
L OUT
5
R OUT
BUFFER
Q131
BUFFER
Q231
BUFFER
Q101
BUFFER
Q201
MUTE
Q251
RV351
VOLUME
BOARD
MOTOR(6P)
15
MDP
21
SP IN
7
MUTE
79
XRST
53
BUZZER
77
A MUTE
79
POWER ON
DOOR IN
75
LIMIT
SW
11
12
3
5
8
IC371
POWER AMP
SP101
L
SP201
R
(SPEAKER)
KEY BOARD
+B SW
Q1
+5V
TU +B
SEG0
SEG15
11
26
LIQUID CRYSTAL
DISPLAY PANEL
LCD401
COM0
COM3
7
10
KEY0
KEY12
33
47
FUNCTION
KEY
S601-613
BOARD
LED
D401-402
D653
D652
D651
60
ALM-BUZZER LED
59
ALM-RADIO LED
58
ALM-CD LED
67
RESET
D905-908
AC
IN
T901
POWER
TRANSFOMER
BOARD
TRANSFORMER
REG
Q903
REG
Q901
+B SW
Q551
CD +B
+5V
M +6V
IC402
D903
D904
49
AC IN
57
CD ON
FM
TRACKING
AM
TRACKING
FM
FREQUENCY
COVERAGE
AM
FREQUENCY
COVERAGE
AM
IF
FM
VCO
(FM ANTENNA)
M571
M572
S570
12
12
ICF-CD830/CD830L
5-3. BLOCK DIAGRAM (CD830L)
: MW/LW
: FM
: CD
• Signal Path
SYSTEM CONTROL
IC401
OPTICAL PICK-UP
BLOCK
(KSS-213C)
A
B
C
D
E
F
LD
VC
+5V
GND
PD
VR
LD
DRIVE
FOCUS
COIL
TRACKING
COIL
Q501
RF AMP
IC501
VC
51
PD1
38
PD2
39
E
42
F
41
LD
36
PD
37
MOTOR/COIL DRIVE
IC591
F+
26
F-
27
T+
17
T-
18
SL+
2
SL-
1
M
SLED
MOTOR
SP+
12
SP-
11
M
SPINDLE
MOTOR
F+
F-
T+
T-
25
19
3
SLO
16
TAO
13
FEO
6
DIGITAL SIGNAL PROC.
D/A CONV.
IC551
DIGITAL SERVO
RF
35
32
RFI
33
RFO
DATA
20
CLK
23
XRST
DATO
12
CLKO
14
67
L OUT1
74
L OUT2
7
DATA
9
CLK
8
XLAT
4
SQCK
57
SCOR
5
SQSO
71
XTAI
72
XTAO
17
XLON MUTE
X551
16.9344MHz
C DATA
56
C CLOCK
54
C LATCH
55
C SQCK
62
C SQSO
61
C SENS
50
6
SENS
C MUTE
63
13
14
FM IF
AM IF
FM/AM
FRONT- END
15 BAND
C SCOR
52
SL IN
T IN
F IN
MAIN BOARD
ANT1
18
20
22
19
24
FM RF IN
FM RF OUT
FM OSC
AM RF
AM OSC
BPF1
B.P.F
3
1
IC1
CF3
10.7MHz
T1
AM IFT
MUTE
Q151
MUTE
CONT
Q351
Q351
S401
DOOR SW
22
21
XLT
XLTO
13
27
FOK
FOK
18
24
COUT
CIN
11
25
SENS1
SEIN
10
26
SENS2
76
A OUT2
65
A OUT1
SPOA(LIMIT)
15
62
SMUTE
RADIO ON
80
C SENS2
51
C RST
64
21 REG
L2
CT2
FM RF
CT2,L2
CV1-2
CV1-4
CV1-1
L3
CT3
FM OSC
L3,CT3
CV1-3
L4
MW/LW
OSC
OSC
RESET
IC402
16
MIX OUT
CF2
455kHz
26
DISCRI
27
VCO
CF1
RV1
6
L OUT
5
R OUT
BUFFER
Q131
BUFFER
Q231
BUFFER
Q101
BUFFER
Q201
MUTE
Q251
RV351
VOLUME
BOARD
MOTOR(6P)
15
MDP
21
SP IN
7
MUTE
79
XRST
53
BUZZER
77
A MUTE
79
POWER ON
DOOR IN
75
LIMIT
SW
11
12
3
5
8
IC371
POWER AMP
SP101
L
SP201
R
(SPEAKER)
KEY BOARD
+B SW
Q1
+5V
TU +B
SEG0
SEG15
11
26
LIQUID CRYSTAL
DISPLAY PANEL
LCD401
COM0
COM3
7
10
KEY0
KEY12
33
47
FUNCTION
KEY
S601-613
BOARD
LED
D401-402
D653
D652
D651
60
ALM-BUZZER LED
59
ALM-RADIO LED
58
ALM-CD LED
67
RESET
D905-908
AC
IN
T901
POWER
TRANSFOMER
BOARD
TRANSFORMER
REG
Q903
REG
Q901
+B SW
Q551
CD +B
+5V
M +6V
IC402
D903
D904
49
AC IN
57
CD ON
FM
TRACKING
FM
FREQUENCY
COVERAGE
AM
IF
FM
VCO
(FM ANTENNA)
M571
M572
S570
L1-1
(MW)
L1-2
(LW)
L1
MW/LW FERRITE-ROD
ANTENNA
L1-2,CT5
LW TRACKING
MW
FREQUENCY
COVERAGE
L1-1,CT1
MW TRACKING
L4,CT4
LW
FREQUENCY
COVERAGE
CT6
CT6
S1-2
MW
LW
FM
Q2,Q3
S1-1
CT4
CT5
CT1
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