Sony CDX-4240R / CDX-4250R Service Manual ▷ View online
Pin No.
Pin Name
I/O
Pin Description
56
AMP ON
O
Power amplifier power control output
57
TXT ON
O
Reset output to CD-TEXT decoder IC. (Not used in this set.)
58
VOL ATT
O
Electric volume mute control output
59
NIL
—
Not used. (Open)
60
ATT
O
System attenuate control output
61
RC IN1
I
Rotary commander shift key input 1
62
TU ATT
O
Tuner attenuate output
63
VSS
—
Ground
64
NIL
—
Not used. (Open)
65
SSTOP
I
IF counter result signal detection input of PLL.
66
TEST
I
Test mode initial setting detection input
67
DAVN
I
RDS IC data acquisition detection input
68
FM ON/AM ON
O
FM ON output
69
TU ON
O
Tuner power control output
70
SDA
I/O
I
2
C BUS serial data input/output
71
SCL
O
I
2
C BUS serial clock output
72
NOSE2
I
Front panel OPEN detection input
73
X1A
O
Sub ceramic oscillator output (32 kHz)
74
X0A
I
Sub ceramic oscillator input (32 kHz)
75
SCOR
I
SCOR signal detection input
76
BU IN
I
Backup power detection input
77
DQSY
I
CD-TEXT data setting completion signal detection input (Not used in this set.)
78
CD SENS
I
CD SENS signal detection input
79
NIL
I
Key input acknowledge
80
TEL ATT
I
Telephone attenuate detection input
81
ST/MONO
I/O
Tuner stereo signal detection input/forced monaural output
82
SEEKOUT
O
SEEK output
83
SD IN
I
Signal detector input
84
WIDE
O
WIDE select output (Not used in this set.)
85
NARROW
O
NARROW select output (Not used in this set.)
86
HSTX
—
Hardware standby input (Connect to pin (º (RESET).)
87
MD2
—
Operation mode input (Connect to ground in this set.)
88, 89
MD1, 0
—
Operation mode input (Connect to VCC in this set.)
90
RESET
I
Reset input
91
VSS
—
Ground
92
X0
I
Main ceramic oscillator input (4.19 MHz)
93
X1
O
Main ceramic oscillator output (4.19 MHz)
94
VCC
—
Power supply pin (+5 V)
95
COM8V ON
O
COM 8V control output
96
NIL
—
Not used. (Open)
97
AREA1
I
Destination select input 1 (Fixed at “L” in this set.)
98
AREA2
I
Destination select input 2 (Fixed at “L” (AEP, UK model) or “H” (German model)
in this set.)
99
LOUD
I
Fixed at “L” in this set.
100
BAND
I
Fixed at “H” in this set.
101
ACC IN
I
Accessory power detection input
102, 103
PH3, 2
I
Disc insertion detection photo sensor input (Fixed at “H” in this set.)
104
LCD CE
O
LCD chip enable output
105
FLS W
I
Flash write input (Fixed at “H” in this set.)
106, 107
RE IN0, 1
I
Rotary encoder input
108
ILL ON
O
Illumination power control output
109
PW ON
O
System power control output
110
NIL
—
Not used. (Open)
Pin No.
Pin Name
I/O
Pin Description
111
ANT REM
O
ANT REMOTE power control output
112
NIL
—
Not used. (Open)
113
CTL2
—
Not used in this set.
114
CD LD
O
Loading motor control output (Loading direction)
115
CD EJ
O
Loading motor control output (Eject direction)
116
L SW
I
Sled limit switch detection input
117
IN SW/(PH1)
I
Disc insertion detection input
118
D SW
I
DOWN switch detection input
119
VSS
—
Ground
120
SELF SW/(IN SW)
I
Disc self store detection input
– 21 –
– 22 –
35
31
36
39
38
PD1
RF
CLKO
XLTO
DATO
SE IN
FOK
CN IN
RF 0
21
PCMD
22
BCK
20
LRCK
34
XTAI
27
GFS
19
CLK
20
XLT
21
DATA
24
SENS
25
FOK
23
14
DIN
59
57
56
54
1
55
C. OUT
37
FE BIAS
22
50
XRST
16
SLO
6
FEO
13
TAO
PD2
E
F
1 FEO
2 FEI
34 PD
33 LD
XRST
MDP
RF AMP, SERVO CONTROL
IC2
OPTICAL PICK-UP
KSS-521A
DIGITAL SIGNAL PROCESSOR
IC1
D/A CONVERTER
IC702
FOCUS
GAIN
RV4
FOCUS
BIAS
RV1
LD POWER
CONTROL
Q1, 2
PD
LD
FOCUS/TRACKING COIL DRIVE,
MOTOR DRIVE
IC3
CH2 IN
LEVEL
SHIFT
22
16
15
TRACKING
CH1 IN
LEVEL
SHIFT
19
18
17
FOCUS
M902
(SLED)
CH2+
CH2–
CH1+
CH1–
CH3 IN
LEVEL
SHIFT
24
13
14
CH3+
CH3–
M
M901
(SPINDLE)
CH4 IN
LEVEL
SHIFT
2
CTL2 5
12
CH4+
M
M903
(LOADING)
FWD
LEVEL
SHIFT
6
REV
7
10
CH5+
M
49
SENS
46
SQSO
47
SQCK
51
DATA
52
XLAT
53
CLOK
43
SCOR
41
WFCK
44
SBSO
5
BCKIN
6
LRCIN
4
CLKO
19
XTI
1
XTO
20
RSTB
15
12
V OUTL
9
V OUTR
17
MC/DM1
X700
16.9344MHz
3
SELECT
SWITCH
Q3-6
SCOR
CLOK25
XLAT25
DATA25
SQ CKO
SQ SI
CD SENS
GFS
XRST
C IN
FOK
LD ON
CD LD
CD EJ
L SW
IN SW
D SW
SELF SW
SW3
(LIMIT)
SW1
(DISC IN)
SW4
(DOWN)
SW2
(SELF)
23
2
1
114
115
116
117
118
120
75
28
3
4
19
17
78
6
5
DEEMPH
R-CH
30
SYSTEM CONTROL
IC801 (1/3)
CD L-CH
TUNER
SECTION
A
I-V
AMP
04
• Signal path
: CD
– 23 –
– 24 –
CDX-4240R/4250R
4-2. BLOCK DIAGRAM — CD SECTION —
(Page 25)
ANT AM
L
CD L-CH
ANT FM
1
18
R 16
AM DET 12
FM+B 8
TU+B 9
AM+B 10
VT 5
LCL/DX 4
FM/AM IF 21
VCO 6
AM OSC 13
FM DET 23
S-METER 19
ST/MONO 22
SD 20
SEEK 11
2
CNJ600
(ANTENNA)
TUNER UNIT
TU601
R-CH
FM8V
TU8V
AM8V
CD
SECTION
A
SE3L
SE3R
SCL
SDA
28
FML
1
CDL
OUT FL
12
22
OUT RL 20
27
MUTE
26
24
25
ELECTRONIC
VOLUME
IC401
SYSTEM CONTROL
IC801 (2/3)
TU ATT
ATT 60
X1A 73
X0A 74
62
SEEK OUT
82
SD IN
83
ST/MONO
81
S-METER
53
VOL ATT
58
SCL
71
SDA
70
SSTOP
65
X801
32kHz
X0 92
X1 93
AMP ON 56
AMP ATT 31
TEL ATT 80
TEST 66
FM ON/
AM ON
68
TU ON 69
X800
3.68MHz
AMP
Q618
RV801
S-METER
LP OUT
28
LCL/DX
5
IF AM
14
IF FM
15
FM IN
24
AM IN
25
OSC IN
9
OSC OUT
10
S METER
20
XO
4
XI
5
FM DET
16
5
1
SCL 12
SDA 13
SSTOP 16
SDA 9
SCL 10
MPTH 2
DAVN 8
PLL
IC601
MPDH
52
DAVN
67
QUALITY
50
NS MASK
55
X601
10.25MHz
X602
4.3MHz
RDS DECODER
IC602
NOISE
FILTER
IC603
NOISE
CONTROL
Q804
RDS POWER
CONTROL
Q604,605
TU5V
FM8V
RDS5V
MUTE
CONTROL
Q401,402
D402
MUTE
Q111
MUTE
Q110
12
11
4 22
5
3
POWER AMP
IC200
1
9
9
7
2
10
13
15
5
6
7
16
CNP501
STBY
MUTE
Q916
AMP+B
ANT+B
ACC
BATT
F901
FL+
FL–
RL+
RL–
ATT
CDX-4250R
TEST
AMP REM
ANT REM
ACC
BATT
PJ400
L
R
R-CH
–2
–1
LINE OUT REAR
04
TUNER POWER
CONTROL
Q603,609
AM/FM POWER
CONTROL
Q610,612,615
+5V REG
Q613
+8V
FM 8V
AM 8V
TU 5V
TU 8V
MUTE
Q101
AM OSC
Q614
• Signal path
: CD
: FM
: MW
4-3. BLOCK DIAGRAM — TUNER SECTION —
CDX-4240R/4250R
– 25 –
– 26 –
(Page 24)
– 27 –
– 28 –
CDX-4240R/4250R
4-4. BLOCK DIAGRAM — DISPLAY SECTION —
RESET
IC902
1
2
BU5V
BATT
90
13
RESET
SO
14
CKO
46
KEY IN0
104
CE
DATA
CLK
CE
ILL ON
76 BU IN
SYSTEM CONTROL
IC801 (3/3)
LCD DRIVE
IC501
LCD
RC
LCD
BACK-UP
CHECK
Q906
BACK-UP
CHECK
Q917,918
ACC
CHECK
Q905
LCD POWER
CONTROL
Q901,902
ROTARY
ENCODER
RE501
KEY ACTIVE
Q914,915
+10V REG
Q903
POWER
CONTROL
Q913,919
BATT
CHECK
Q940
+8V REG
Q904
+8V REG
Q912
CD POWER
CONTROL
Q907,908
ANT POWER
CONTROL
Q924,925
95 COM8V ON
35 CD ON
32
47
48
MD ON
BATT
101
108
RE IN0 106
RE IN1
KEY IN1
KEY IN2
79
NIL
37
NIL
61
IN1
49
IN0
107
ACC IN
111 ANT REM
109 PW ON
D910
BATT
D807
+5V REG
Q909
CD POWER
CONTROL
Q910,911
BATT
BATT
BATT
ACC
D909
BATT
D940
+8V
CD5V
AMP ON
1
2
4
VCC
AMP+B
5 BU+B
AMP+B
ANT+B
MD 8V
BU5V
POWER SUPPLY
IC901
64
63
62
DIM ON 1
DIMMER
CONTROL
Q502,505
LCD501
PL501,502
LED501-505,
LSW511-529
LSW511-529
D-BASS
S501
D919
D918
CNP802
(REMOTE IN)
(REMOTE IN)
KEY MATRIX
LSW511-529
LSW511-529
S502
04
S900
RESET
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