Sony CDX-L480X Service Manual ▷ View online
13
CDX-L480X
SECTION 3
DIAGRAMS
3-1. IC PIN DESCRIPTION
• IC501 MN101C49KSG (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
VREF–
—
A/D converter power supply (–) pin
2
VSM
I
S-meter voltage detection input
3
QUALITY
I
Noise detection input
4, 5
KEYIN1, 0
I
Key input 1, 0
6
RCIN0
I
Rotary commander key input
7 – 9
NIL
I
Not used. (Fixed at L in this set)
10
VREF+
—
A/D converter power supply (+) pin (+5 V)
11
VDD
—
Power supply pin (+5 V)
12
OSCOUT
O
Main clock output (18.432 MHz)
13
OSCIN
I
Main clock input (18.432 MHz)
14
VSS
—
Ground
15
XIN
I
Sub clock input (32.768 kHz)
16
XOUT
O
Sub clock output (32.768 kHz)
17
MMOD
I
Not used. (Fixed at L in this set)
18
LCDSO
O
Serial data output for LCD driver IC.
19
LCDCE
O
Chip enable output for LCD driver IC.
20
LCDCKO
O
Serial clock output for LCD driver IC.
21
CD_TSO
O
Serial data output for CD servo IC.
22
CD_TSI
I
Serial data input from CD servo IC.
23
CD_TCKO
O
Serial clock output for CD servo IC.
24
SYSRST
O
Not used. (Fixed at H in this set)
25
BUSON
O
Not used. (Fixed at H in this set)
26
KEYACK
I
Key acknowledge detection input
27
DAVN
I
RDS data block synchronization detection input
28
BUIN
I
Backup power supply input
29
SIRCS
I
SIRCS input
30
TU_ATTIN
I
Tuner attenuator control input
31
CD_PACK
I
CD text pack synchronization signal input from CD servo IC.
32
NC (VCC)
—
Power supply pin (+5 V)
33
RESET
I
Microcomputer reset input
34
NOSE-SW
I
Not used. (Fixed at H in this set)
35
BEEP
O
Beep output
36
NC
O
Not used. (Open)
37
TESTIN
I
Test mode detection input
38
ACCIN
I
Accessory power supply detection input
39
NC
O
Not used. (Open)
40
TELATT
I
Telephone attenuator detection input
41
NC (VCC)
I
Not used. (Fixed at H in this set)
42
UNISO
O
Not used. (Open)
43
UNISI
I
Not used. (Fixed at L in this set)
44
UNICKO
O
Not used. (Fixed at L in this set)
45
I2C_SIO
I/O
I
2
C BUS serial data input/output
46
NC
O
Not used. (Open)
47
I2C_CKO
O
I
2
C BUS serial clock output
48, 49
NC
O
Not used. (Open)
50
CD_SELFSW
I
CD mechanism deck Self switch detection input
51
TSTB
O
CD text parameter strobe output for CD servo IC.
52
RFOK
I
RFOK signal input from CD servo IC.
53
CD_RST
O
Reset signal output for CD servo IC.
54
A0
O
Command/parameter discrimination signal output for CD servo IC.
55
STB
O
Data strobe signal output for CD servo IC.
14
CDX-L480X
Pin No.
Pin Name
I/O
Pin Description
56
X_EN
O
Not used. (Open)
57
LIMIT
I
CD mechanism deck Limit switch detection input
58
NCO
O
Not used. (Open)
59
D_SW
I
CD mechanism deck Down switch detection input
60
INSW
I
CD mechanism deck Disc in switch detection input
61
NC
O
Not used. (Open)
62
CD_LM_LO
O
CD mechanism deck loading motor control output (Loading direction)
63
CD_LM_EJ
O
CD mechanism deck loading motor control output (Eject direction)
64 – 66
NC
O
Not used. (Open)
67
ATT
O
System attenuator control output
68
DIAG
I
Mode input from power amp IC.
69
STB
O
Standby control output for power amp IC.
70
VOLATT
O
Electronic volume attenuator control output
71 – 74
NC
O
Not used. (Open)
75
DOOR-IND
O
Not used. (Open)
76 – 84
NC
O
Not used. (Open)
85
NS_MASK
O
Noise mask output
86
E2P_CKO
O
EEPROM serial clock output
87
E2P_SIO
I/O
EEPROM serial data input/output
88
TU-ATT
O
Tuner attenuator control output
89, 90
NC
O
Not used. (Open)
91
AD_ON
O
Key power supply control output
92, 93
NC
O
Not used. (Open)
94
PANEL_SW
I
Front panel OPEN/CLOSE detection input
95
DAVSS
—
D/A converter power supply (–) pin
96
COLSW
I
Not used. (Open)
97
FLASH_W
I
Flash microcomputer write detection input
98
RCIN1
I
Rotary commander SHIFT key input
99
NC
O
Not used. (Open)
100
DAVDD
—
D/A converter power supply (+) pin (+5 V)
15
15
CDX-L480X
84
85
82
83
16
12
D/A
CONV
TRACKING
ERROR
FORCUS
ERROR
1
OSC
EFM
DEMOD
SERVO
CTL
RF
EQ
EQ
52
56
DSUB CODE
PROCESS
8
7
6
5
4
3
2
60
50
57
59
31
51
21
22
23
55
54
53
52
I/F
87
86
97
98
LD
DRIVE
Q1
FOCUS
COIL
DRIVE
TRACKING
COIL
DRIVE
SLED
MOTOR
DRIVE
SPINDLE
MOTOR
DRIVE
LOADING
MOTOR
DRIVE
6
5
23
2
16
15
17
18
13
14
11
12
9
10
26
62 63 64 65
63
62
33
M902
(SLED)
M901
(SPINDLE)
M903
(LOADING)
SW3
(LIMIT)
SW2
(SELF)
SW5
(DOWN)
SW1
(DISC IN)
X1
16.9344MHz
OPTICAL PICK-UP
(KSS-720A)
I-V
CONV.
CDL
CDR
CDR
CD PACK
TSTB
STB
AO
CD_TSO
CD_TSI
CD_TCKO
CD_RST
RFOK
INSW
LIMIT
CD_SELFSW
D_SW
CD_L_ LO
CD_LM_EJ
TUNER
SECTION
A
23
24
M
M
M
IC602
B.UP+B
LOUT
ROUT
PACK
TSTB
SI
RFOK
SO
SCK
STB
AO
RST
RESET
A
C
B
D
E
F
PD
LD
A
C
B
D
E
F
PD
LD
LD AMP
FOCUS
COIL
TRACKING
COIL
FD
FSC+
FSC-
TRK+
TRK-
SL-
SL+
SP-
SP+
LD-
LD+
TD
SD
MD
LOAD
EJECT
SYSTEM CONTROL
IC501 (1/3)
RF AMP,DIGITAL SERVO,
DIGITAL SIGNAL PROCESSOR
IC1
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE/LOADING MOTOR DRIVE
IC2
FD
TD
SD
MD
Signal path
: CD
A5V
AU5V
D5V
DR6V
SERVO 5V
MECH6V
+
-
+
-
+
-
1
S702
RESET
RESET
3
3-2. BLOCK DIAGRAM — CD SECTION —
(Page 16)
16
16
CDX-L480X
J1
(ANTENNA)
1 ANT
CDL
CDR
R-CH
3
R-CH
9
RDS
16
9
10
8
MPX
VDD
RDS DEMODULATOR
IC51
SDA
SCL
DAVN
4 OSCO
5 OSCI
AUDIO 8.3V
TUNER UNIT
TU1
6
S-METER
14
TU-SDA
SYSTEM CONTROL
IC501 (2/3)
67
ACCIN 38
TELATT 40
STB 69
BEEP 35
CD
SECTION
A
3
11
CN601
1
9
FL+
FL-
2
10
RL+
RL-
4
12
13
7
FR+
FR-
15
RR+
RR-
TEST
ACC
ATT
16 +B(BATT)
8 GND
R-CH
F901
10A
TU-ATTIN
QUALITY
NS-MASK
NC
BATT
17
19
18
BATT
3
E2P_CKO
86
VSM
13
TU-SCL
ATT
BATT
68
TESTIN
DIAG
37
2
VOLATT
70
SOUND CONTROL
ELECTRONIC VOLUME
IC401
VCC
NC
16
BUS-LCH
5
CD-LCH
9
TV-LCH
7
SDA
SCL
MUTE
CONT.
EVR
19
I2C_SIO
I2C_CKO
45
47
17
E2P-SDA
16
E2P-SCL
5
QUALITY
8
MUTE-CONDITION
7
TU-MUTE
11
TU-VDD
10
VCC(8.3V)
27
87 E2P_SIO
DAVN
85
30
TU-ATT
88
R-CH
25
29
AUDIO OUT REAR
-1
L
R
-2
R-CH
J330
5 ANP-R
27
35
37
34
33
31
30
6 ANT-R
BEEP
STB
4
SCL
2
SDA
CONT.
9
7
6
20
POWER AMP
IC750 (1/2)
MULTIPLE VOLTAGE
REGULATOR
IC750 (2/2)
AUDIO 8.3V
VP2
VP1
VP1
• Signal path
: FM
: CD
• R-ch is omitted due to same as L-ch.
12
SYSRST
B.UP+B
24
BUSON 25
UNISI 43
UNICKO 44
UNISO 42
BU IN 28
4
L-CH
OUT
-FL
13
OUT
-RL
12
+5V REG.
Q1
BACK-UP CHECK/
LOW VOLTAGE
CHECK
Q581,582
OVER VOLTAGE
DET.
Q580,D580,581
LINE MUTE
CONTROL
Q478,479
TEL
ATT
ATT
Q651
I2C
BUS
ACC
DETECT
Q631
MUTE
Q441
MUTE
Q461
11
MUTE
TONE
INPUT SELECTOR
EFFECT
Q22
X51
4.332MHz
5
3
DIAG
AMP-REM
ANT-REM
B.UP+B
PANEL+B
MECH 6V
SERVO 5V
AUDIO 8.3V
B.UP+B
PANEL+B
MECH 6V
SERVO 5V
AUDIO 8.3V
SERVO 5V
AUDIO 8.3V
VP
D759
D760
MUTE
16
22
I2C
BUS
21
20
3-3. BLOCK DIAGRAM — TUNER SECTION —
(Page 15)
Click on the first or last page to see other CDX-L480X service manuals if exist.