Diagrams; Block Diagram; Circuit Boards Location - Sony ICF-CD823 Service Manual

SECTION 5
DIAGRAM

5-1. BLOCK DIAGRAM

FM/AM
MAIN BOARD
FRONT- END
IC1
ANT1
BPF1
FM RF IN
1 B.P.F 3 18
(FM ANTENNA)
MIX OUT
21 REG
L1
FM RF
20 FM RF OUT
CT1
FM
TRACKING
22 FM OSC
FM
L2
FREQUENCY
FM OSC
COVERAGE
DISCRI
L3
MW ANT
AM
TRACKING
AM RF
19
D4
VCO
L4
AM OSC
AM
FREQUENCY
24 AM OSC
COVERAGE
PLL
IC51
12 FM IN P1
11 AM IN
DATA
L.P.F
15 PD CLK
Q51,52
LAT
X OUT X IN
PLL +B
1 2
X51
75kHz
OPTICAL PICK-UP
BLOCK
RF AMP
(KSS-213C)
IC501
VC 51 VC RFO 33
+5V RFI 32
A
38 PD1
B
39 PD2
C
D
DATA 22
E
42 E CLK 20
F
41 F XLT 21
Q501
FOK 27
LD LD
36 LD COUT 24
DRIVE
SENS1 25
SENS2 26
GND
XRST 23
PD
37 PD
VR
MOTOR/COIL DRIVE
IC591
F+
26 F+ F IN 25
FOCUS
COIL (F IN) 24
F-
27 F-
T+
17 T+ T IN 19
TRACKING
COIL
T-
18 T-
MOTOR(6P)
BOARD
2 SL+ SL IN 3
1 SL-
M571
SLED
M
MOTOR
12 SP+ SP IN 15
11 SP- MUTE 7
M572
SPINDLE
M
MOTOR
S570 LIMIT
SW
S501
DOOR SW
16
— 11 —
BUFFER
L OUT 6
Q102
CF3
BUFFER
10.7MHz R OUT 5
Q202
16 13 FM IF
MUTE
T1 CONT
AM IFT Q302
CF2
BUFFER
450kHz
Q103
14 AM IF
AM
IF BUFFER
Q203
26 SYSTEM CONTROL
IC401
CF1
15 BAND A MUTE 58
BUZZER
53
POWER ON 64
LCD401
27
LIQUID CRYSTAL
RV1
DISPLAY PANEL
FM
VCO
+B SW SEG0 11
TU +B +5V
Q5
SEG15 26
60 RADIO ON
7
COM0
10
COM3
8
KS0 35
KS2 37
61 R DATA
5
4 62 R CLK KRO0 38
3 63 R LAT
41
KR0
KR3 44
KR04 64
DIGITAL SERVO
DIGITAL SIGNAL PROC.
D/A CONV.
IC551
35 RF L OUT1 67
A OUT1 65
32
KRO1
L OUT2 74
KR03 34
A OUT2 76
12 DATO
14 CLKO
13 XLTO
18 FOK
RESET
11 CIN DATA 7 77 C DATA RESET 67
IC402 IC402
10 SEIN CLK 9 75 C CLOCK
XLAT 8 76 C LATCH
SQCK 4 56 C SQCK
SCOR 57 49 C SCOR
SQSO 5 54 C SQSO
SENS 6 52 C SENS
55
SMUTE 62 C MUTE
6 FEO
AC IN 51
7 FEM
13 TAO
XTAI 71
X501
16.9344MHz
XTAO 72 CD ON 59
16 SLO
XRST 79
21 MDP
XLDON MUTE 17
15 SPOA(LIMIT)
50 C SENS2
57 C RST
47 DOOR IN
AEP, Australian model
HEADPHONE BOARD
RV301
VOLUME
J301
11 5
POWOR AMP
MUTE
IC351
Q101
12 3
MUTE
Q201
SP101
MUTE
L
Q353
SPEAKER
SP201
MUTE
MUTE
CONT R
Q354
Q351,352
US, Canadian model
KEY(UPPER)
BOARD
S701-713
FUNCTION
KEY
KEY(FRONT)
BOARD
S715-718
FUNCTION
KEY
S719,721-723
S720 DIAL
(ALARM)
ALARM B
RADIO BUZZER
BACK LIGHT
BOARD
D402-404
D901,902
PLL +B
D903
D910
REG
CD +B
Q301 TRANSFORMER
BOARD
REG T901
+5V
Q901 POWER
TRANSFOMER
D904-907
REG AC
M +5V
Q902 IN
• Signal Path
: FM
: CD
— 12 —
Note on Printed Wiring Board: • Waveforms
• X : parts extracted from the component side.
• b : Pattern from the side which enables seeing.
1
IC401 ud (XT1)
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 / W or less unless otherwise
4
31 ms
specified.
1.0 V/DIV, 20 ms/DIV
• ¢ : internal component.
• 2 : nonflammable resistor.
2
IC501 ed (RF0)
• C : panel designation.
(PLAY MODE)
• H : adjustment for repair.
• U : B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
Note: Note:
The components identi- Les composants identifiés par 0.2 V/DIV, 500 ns/DIV
fied by mark ! or dotted une marque ! sont critiques
3
IC551 ua (XTA0)
line with mark ! are criti- pour la sécurité.
cal for safety. Ne les remplacer que par une
piéce por tant le numéro
Replace only with part
number specified. spécifié.
no mark : FM
( ) : AM 59 ns
2.0 V/DIV, 40 ns/DIV
< > : CD
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F : FM
f
: AM
J : CD
• Abbreviation
CND : Canadian model
AUS : Australian model
5-2. CIRCUIT BOARD LOCATION
KEY (UPPER) board
HEADPHONE board
BACK LIGHT board
KEY (FRONT) board
— 13 —
ICF-CD823
3.4 Vp-p
0.9 – 1.3 Vp-p
5.6 Vp-p
MOTOR (6P) board
MAIN board
TRANSFORMER board