ICF-CD823L - Sony Audio Service Manual (repair manual). Page 11

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ICF-CD823L
SECTION  5
DIAGRAM

Note on Printed Wiring Board:
• X : parts extracted from the component side.
• b : Pattern from the side which enables seeing.
•
a
: Through hole.

Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted.  pF: µµF
50 WV or less are not indicated except for electrolytics
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.
• U : B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(         ) : 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.
• Signal path.
F
: FM
f
: MW/LW
J
: CD
— 11 —
— 12 —
— 13 —
5-1.  BLOCK DIAGRAM
5-2.  CIRCUIT BOARD 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
KEY (UPPER) board
HEADPHONE board
MOTOR (6P) board
MAIN board
TRANSFORMER board
BACK LIGHT board
KEY (FRONT) board

Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
: 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
24
FEM
7
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
XLDON MUTE
X501
16.9344MHz
C DATA
77
C CLOCK
75
C LATCH
76
C SQCK
56
C SQSO
54
C SENS
52
6
SENS
C MUTE
55
13
14
FM IF
AM IF
FM/AM
FRONT- END
15 BAND
C SCOR
49
(F IN)
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
Q101
MUTE
CONT
Q302
S501
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
R CLK
62
R LAT
63
RADIO ON
60
C SENS2
50
C RST
57
21 REG
D5
(1/3)
L3-1
(MW)
L3-2
(LW)
L3
MW/LW FERRITE-ROD
ANTENNA
L1
C T1,L1
FM RF
CT1
D2
D3
L2
FM OSC
CT2
L4
MW/LW 
OSC
RESET
IC402
IC51
PLL
FM IN
12
AM IN
11
PD
15
8
P1
5
DATA
4
CLK
3
LAT
2
1
X IN
X OUT
L.P.F
Q51,52
P2
10
75kHz
X51
PLL +B
16
MIX OUT
CF2
450kHz
26
DISCRI
27
VCO
CF1
RV1
6
L OUT
5
R OUT
BUFFER
Q102
BUFFER
Q202
BUFFER
Q103
BUFFER
Q203
MUTE
Q201
RV301
VOLUME
BOARD
MOTOR(6P)
15
MDP
21
SP IN
7
MUTE
79
XRST
53
BUZZER
58
A MUTE
64
POWER ON
DOOR IN
47
LIMIT
SW
11
12
5
3
IC351
POWOR AMP
MUTE
Q353
MUTE
CONT
Q351,352
MUTE
Q354
J301
SP101
L
SP201
R
SPEAKER
HEADPHONE BOARD
+B SW
Q5
+5V
TU +B
R DATA
61
SEG0
SEG15
11
26
LIQUID CRYSTAL
DISPLAY PANEL
LCD401
COM0
COM3
7
10
KS0
KS2
35
37
FUNCTION
KEY
S701-713
BOARD
KEY(UPPER)
FUNCTION
KEY
S715-718
ALARM B
S720
RADIO
BUZZER
BOARD
KEY(FRONT)
DIAL
(ALARM)
S719,721-723
D402-404
BOARD
BACK LIGHT
38
KRO0
64
KR04
KR0
KR3
41
44
67
RESET
KRO1
KR03
32
34
D904-907
AC
IN
T901
POWER
TRANSFOMER
BOARD
TRANSFORMER
REG
Q902
REG
Q901
REG
Q301
PLL +B
CD +B
+5V
M +5V
IC402
D901,902
D903
D910
51
AC IN
59
CD ON
16
L3-2,CT3
LW TRACKING
L2
FM
FREQUENCY
COVERAGE
MW
FREQUENCY
COVERAGE
AM
IF
FM
VCO
(FM ANTENNA)
M571
M572
S570
D5
(2/3)
D5
(3/3)
CT3
CT4
VREF
VREF
Q1
Q1
MW/LW
SWITCHING
Q2
MW/LW
SWITCHING
Q2
FM TRACKING
L3-1,CT2
MW TRACKING
L4
LW
FREQUENCY
COVERAGE
CT4
Display
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