Sony ICF-CD823 Service Manual ▷ View online
ICF-CD823
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5-4. SCHEMATIC DIAGRAM – MIAN SECTION (2/2) –
The components identified by
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
mark 0 or dotted line with mark
0 are critical for safety.
Replace only with part number
specified.
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
• Refer to page 13 for Waveforms.
• Refer to page 26 for IC Block Diagrams.
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○
○
○
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ICF-CD823
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5-5. PRINTED WIRING
BOARD
– MAIN SECTION –
BOARD
– MAIN SECTION –
Ref. No.
Location
D2
B-10
D3
B-10
D4
B-11
D101
G-11
D102
F-12
D201
F-11
D301
D-3
D401
D-4
D501
D-2
D551
D-3
D552
D-13
D901
F-8
D902
F-8
D903
F-8
D904
G-8
D905
F-8
D906
F-8
D907
G-8
D908
D-10
D909
E-10
D910
F-8
IC1
C-10
IC51
A-4
IC351
F-10
IC401
D-5
IC402
E-8
IC501
E-2
IC551
D-2
IC591
E-3
Q5
C-4
Q51
A-10
Q52
A-10
Q101
G-11
Q102
F-11
Q103
F-12
Q201
F-11
Q202
G-11
Q203
G-12
Q301
D-3
Q302
G-11
Q351
F-9
Q352
F-9
Q353
G-9
Q354
G-9
Q501
F-12
Q901
D-10
Q902
E-10
• Semiconductor
Location
• Refer to page 13 for
Circuit Board Location.
MAIN BOARD
(SIDE B)
MAIN BOARD
(SIDE A)
1-678-388-
11
(11)
1-678-388-
11
(11)
TO
KEY (FRONT)
BOARD
C11
B
TO
BACK LIGHT
BOARD
C
TO
KEY (UPPER)
BOARD
A
TO
MOTOR (6P)
BOARD
F
TO
TRANSFORMER
BOARD
TO
HEADPHONE
BOARD
TO
OPTICAL PICK-UP
BLOCK (KSS-213C)
D
E
L3
L4
CT2
C62
X51
C51
CN401
CN402
CN403
S501
(DOOR SW)
RV1
CF1
C17
C18
C20
L2
L1
C65
C15
BPF1
CF3
CF2
T1
16
15
30
C25
C23
C566
C584
C580
C511
C515
C521
C524
C526
C559
C599
X501
CN502
Q501
C105
C106
C103
C203
CN501
C595
RV301
VOLUME
Q902
Q901
C914
C915
C918
C919
C355
C353
C252
C254
C154
C155
C255
C156
C256
C152
R904
R907
IC351
CN351
KH901
C908
C909
C910
D905
D906
D907
D904
C447
C446
IC402
C912
C436
X402
C402
20
1
80
61
60
41
40
21
X401
1
20
LCD401
(LIQUID CRYSTAL DISPLAY)
1
1
13
14
26
27
39
40
52
14
15
28
1
20
40
60
61
41
21
80
1
16
16
1
2
A
B
C
D
E
F
G
3
4
5
6
7
8
9
10
11
12
13
AEP,AUS MODEL
AEP,AUS
MODEL
MODEL
AEP,AUS
MODEL
MODEL
US,CND
MODEL
MODEL
US,CND,AUS
MODEL
MODEL
AEP
MODEL
MODEL
US,CND
MODEL
MODEL
SP101
(L ch)
SP201
(R ch)
1
1
15
1
8
9
16
ANT1
(FM ANTENNA)
ICF-CD823
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5-6. PRINTED WIRING BOARD – PANEL SECTION –
• Refer to page 13 for Circuit Board Location.
HEADPHONE BOARD
MOTOR (6P) BOARD
BACK LIGHT BOARD
TRANSFORMER BOARD
KEY (FRONT) BOARD
KEY (UPPER) BOARD
1-678-392-
11
(11)
1-678-391-
11
(11)
1-678-393-
11
(11)
1-678-390-
11
(11)
1-678-389-
11
(11)
TO
MAIN BOARD
D
TO
MAIN BOARD
C
1
2
A
B
C
D
E
F
G
3
4
5
6
7
8
9
10
TO
MAIN BOARD
A
TO
MAIN
BOARD
B
TO
MAIN
BOARD
E
TO
MAIN
BOARD
F
TO
DIAL (ALARM)
CLOCK
S716
CLOCK
S707
OFF
S703
1
S708
2
S712
3
S711
CD PLAY
MODE
S713
WAKE UP
TRACK
SNOOZE/DATA
SLEEP OFF
S704
4
S709
5
S706
BAND
S710
RADIO
S705
CD
S720
ALARM B
S718
D.S.T
S715
S701
S702
S717
BUZZER
RADIO
CN701
BH702
1
11
BH701
1
9
TUNING
D404
D403
D402
L251
L151
L351
BH351
CNP352
SP101
(L ch)
SP201
(R ch)
SPEAKER
S714
J301
AC
IN
IN
LF901
CN901
T901
POWER TRANSFORMER
BH704
BACK LIGHT
16
AEP,AUS MODEL
M572
SPINDLE MOTOR
M571
SLED MOTOR
S570
(LIMIT)
R702
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5-7. IC PIN FUNCTION DESCRIPTION
• MAIN BOARD IC401 µPD789407AGK (SYSTEM CONTROL/LCD DRIVER)
Pin No.
1
2
3–5
6
7–10
11–26
27
28–30
31
32–34
35–38
39
40
41–45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78–80
I/O
−
O
−
−
−
O
O
−
Ι
−
Ι
Ο
−
−
−
I
I
−
I
I
I
I
O
O
O
O
O
O
O
O
O
O
O
O
O
O
I
O
I
−
−
−
Ο
Ι
−
Ο
Ο
Ο
Ο
Ο
−
−
−
Description
System power supply
LCD bias output
LCD drive power supply
Ground
LCD drive common signal
LCD drive segment signal
Not used
Initialization input
Not used
Key return signal
Key strobe signal
Analog power supply
A/D converter reference voltage
Key return signal
Key return signal
CD lid open/close detection
Analog ground
Sub code sync input
CD SENS2 input
Power failure detection
CD SENS1 input
Buzzer input
Sub code Q 80-bit serial output
CD mute
CK for reading sub code Q 80-bit
CD reset output
Audio muting output
CD ON output
Radio ON output
Radio data output
Radio CLK output
Radio LAT output
Power ON output
Serial clock output 0
Serial clock output 1
Serial reset input
Main system clock output
Main system clock input (4.19 MHz)
Ground
System power supply
Sub system clock output
Sub system clock input (32 kHz)
Normally, not used. (Used for writing)
CD CLK output
CD LAT output
CD data output
Not used.
Pin Name
VDD1
BIAS
VLC0–2
VSS1
COM0–3
COM3–15
NC
VERSION0–2
NC
KR01–3
KS0–3
AVDD
AVREF
KR0–4
KR00
DOOR IN
AVSS
C SCOR
C SENS2
AC IN
C SENS1
BUZZER
C SQSO
C MUT
C SQCK
C RST
AMUT
DC ON
RADIO ON
R DATA
R CLK
R LAT
POWER ON
SHIFT0
SHIFT1
RESET
X2
X1
VSS0
VDD0
XT2
XT1
IC
C CLK
C LAT
C DATA
NC
5-8. IC BLOCK DIAGRAMS
IC1
CXA1238M-T6
IC51
BU2614FS-E2
30
29
4
5
6
7
8
9
10
11
12
13 14 15
3
2
1
28 27
26 25 24 23 22 21
20
19
18
17
16
REG
FM FRONT-END
AM FRONT-END
VCO
MPX REG.
1/2
COUNTER
1/2
COUNTER
PD1
PD2
MUTING
DECODER AMP
MONO/ST
SELECT
RIPPLE
FILTER
AUTOBLEND
BAND PASS
MUTE
TUNING
INDICATOR
FM IF/
DISCRI
AM
IF/DET
GND
PLL LPF2
MPX REG
VCO
FM
DISCRI
MUTE
AM OSC
AFC
FM OSC
REG
FM RF
AM RF IN
FM RF IN
BAND SELECT
AM IF IN
FM IF IN
TUNE IND
GND
VCC
L CH OUT
R CH OUT
ST IND/
VCO CHECK
PILOT DET LPF2
PILOT DET LPF2
PLL LPF1
AGC AFC2
AGC AFC1
RIPPLE
FIL
TER
FM GND
FM/AM
FE OUT
16
15
14
13
12
11
1
2
3
5
6
7
8
4
10
9
PHASE DET
MAIN CTL
PRESCALER
COUNT
IF
I/O CTL REDISTER
OUT PUT CTL
VSS
PDI
VDD1
VDD2
FM IN
AM IN
P2
IF-IN
P1
P0
CD
DA
CK
CE
X IN
X OUT
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