Diagrams; Block Diagram; Circuit Boards Location - Sony ICF-CD823L Service Manual

SECTION 5
DIAGRAM

5-1. BLOCK DIAGRAM

MAIN BOARD
ANT1
BPF1
1 B.P.F 3
(FM ANTENNA)
C T1,L1
FM TRACKING L1
FM RF
CT1 D2
L2
FM
L3
FREQUENCY L2
MW/LW FERRITE-ROD
COVERAGE FM OSC
ANTENNA
D3
L3-1
(MW)
L3-1,CT2
MW TRACKING
CT2
D5
(1/3)
Q1
Q1
MW/LW
SWITCHING
L3-2
(LW)
CT3
L3-2,CT3
L4
LW TRACKING VREF
MW/LW D5
OSC
(2/3)
L4 Q2
CT4
MW Q2
FREQUENCY MW/LW
COVERAGE SWITCHING
D5
(3/3)
VREF
CT4
LW
L.P.F
FREQUENCY
Q51,52
COVERAGE
PLL +B
OPTICAL PICK-UP
BLOCK
RF AMP
(KSS-213C)
IC501
VC 51 VC RFO
+5V RFI
A
38 PD1
B
39 PD2
C
D
DATA
E
42 E CLK
F
41 F XLT
Q501
FOK
LD LD
36 LD COUT
DRIVE
SENS1
SENS2
GND
XRST
PD
37 PD
VR
MOTOR/COIL DRIVE
IC591
F+
26 F+ F IN
FOCUS
COIL F- (F IN)
27 F-
T+
17 T+ T IN
TRACKING
COIL
T-
18 T-
MOTOR(6P)
BOARD 2 SL+ SL IN
M571 1 SL-
SLED
M
MOTOR
12 SP+ SP IN
M572 11 SP- MUTE
SPINDLE
M
MOTOR
S570 LIMIT
SW
S501
DOOR SW
16
— 11 —
FM/AM
FRONT- END
IC1
BUFFER
L OUT 6
Q102
FM RF IN
18
CF3
BUFFER
10.7MHz R OUT 5
21 REG MIX OUT 16 FM IF Q202
13
T1
20 FM RF OUT
AM IFT
CF2 BUFFER
450kHz
14 AM IF Q103
22 FM OSC
AM
BUFFER
IF
Q203
DISCRI 26
SYSTEM CONTROL
19 AM RF
IC401
CF1
15 BAND A MUTE 58
BUZZER 53
POWER ON 64
VCO
27
RV1
FM
VCO
AM OSC
24
11
+B SW SEG0
TU +B +5V
Q5 26
SEG15
60 RADIO ON
COM0 7
COM3 10
PLL
IC51
35
KS0
P1 8
12 FM IN
KS2 37
11 AM IN
DATA 5 61 R DATA KRO0 38
10 P2
CLK 4 62 R CLK
LAT 3 63 R LAT
15 PD
X OUT X IN
1 2
KR0 41
44
X51 KR3
75kHz
KR04 64
DIGITAL SERVO
DIGITAL SIGNAL PROC.
D/A CONV.
IC551
33 35 RF L OUT1 67
32 A OUT1 65
KRO1 32
L OUT2 74
34
KR03
A OUT2 76
22 12 DATO
20 14 CLKO
21 13 XLTO
27 18 FOK
24 11 CIN DATA 7 77 C DATA RESET 67
25 10 SEIN CLK 9 75 C CLOCK
26 XLAT 8 76 C LATCH
SQCK 4 56 C SQCK
23 SCOR 57 49 C SCOR
SQSO 5 54 C SQSO
SENS 6 52 C SENS
SMUTE 62 55 C MUTE
25 6 FEO
AC IN 51
24 7 FEM
19 13 TAO
XTAI 71
X501
16.9344MHz
XTAO 72 CD ON 59
3 16 SLO
XRST 79
15 21 MDP
XLDON MUTE 17
7 15 SPOA(LIMIT)
50 C SENS2
57 C RST
47 DOOR IN
HEADPHONE BOARD
RV301
VOLUME
11 5
POWOR AMP
MUTE
IC351
Q101
12 3
MUTE
MUTE
CONT
Q201
Q302
SP101
MUTE
L
Q353
SPEAKER
SP201
MUTE MUTE
CONT R
Q354
Q351,352
LCD401
LIQUID CRYSTAL
DISPLAY PANEL
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
RESET
IC402 IC402
D901,902
PLL +B
D903
D910
REG
CD +B
Q301
TRANSFORMER
BOARD
REG T901
+5V
POWER
Q901
TRANSFOMER
D904-907
REG AC
M +5V
Q902 IN
• Signal Path
: FM
: CD
— 12 —
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• b : Pattern from the side which enables seeing.
• : Through hole.
a
Note on Schematic Diagrams:
J301 • 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
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.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
no mark : FM
( ) : MW/LW
< > : 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 : MW/LW
J : CD
5-2. CIRCUIT BOARD LOCATION
KEY (UPPER) board
BACK LIGHT board
KEY (FRONT) board
ICF-CD823L
• Waveforms
1
IC401 ud (XT1)
3.4 Vp-p
31 ms
1.0 V/DIV, 20 ms/DIV
2
IC501 ed (RF0)
(PLAY MODE)
0.9 – 1.3 Vp-p
0.2 V/DIV, 500 ns/DIV
3
IC551 ua (XTA0)
5.6 Vp-p
59 ns
2.0 V/DIV, 40 ns/DIV
MOTOR (6P) board
HEADPHONE board
MAIN board
TRANSFORMER board
— 13 —