Sony CDX-F50M Service Manual ▷ View online
29
CDX-F50M
• IC PIN DESCRIPTIONS
• IC3 MB90487APFV-G-142-BNDE1 (CD SYSTEM CONTROL) (SERVO BOARD (2/2))
Pin No.
Pin Name
I/O
Pin Description
1
NC
O
Servo 1.5 V power supply control signal output
2 to 6
NC
—
Not used. (Open)
7
CD BUS0
I/O
Bus data signal input/output 0
8
CD BUS1
I/O
Bus data signal input/output 1
9
VSS
—
Ground pin
10
CD BUS2
I/O
Bus data signal input/output 2
11
CD BUS3
I/O
Bus data signal input/output 3
12
CD BUCK
O
Bus clock signal output
13
CD XCCE
O
Chip enable signal output
14
CD XRST
O
Reset signal output
15
CD ZDET
I
Zero detection signal input
16 to 20
NC
—
Not used. (Open)
21
VCC
—
Power supply pin (+3.3 V)
22
DAC ZDETL
I
Zero data detection signal input (L-ch)
23
DAC ZDETR
I
Zero data detection signal input (R-ch)
24
NC
—
Not used. (Open)
25
RXD
I
UART RXD data signal input (MCBUS/Flash data input)
26
TXD
O
UART TXD data signal output (MCBUS/Flash data output)
27
DEC SSTBY
O
SRAM STANDBY mode control signal output
28, 29
NC
—
Not used. (Open)
30
DEC INT
I
Request signal input
31, 32
NC
—
Not used. (Open)
33
AVCC
—
Power supply pin (+3.3 V) for A/D converter
34
AVRH
—
External reference voltage for A/D converter
35
AVSS
—
Ground pin
36
NC
—
Not used. (Open)
37
DEC XMUTE
O
Mute signal output L: mute
38, 39
NC
—
Not used. (Open)
40
VSS
—
Ground pin
41
NC
—
Not used. (Open)
42
MEC LIMIT
I
Sled limit in detection switch signal input
43
MEC LOAD
O
Loading motor signal output (Load direction)
44
MEC EJECT
O
Loading motor signal output (Eject direction)
45
MEC INSW
I
Pack-in detection signal input
46
MEC DSW
I
Chucking end detection switch signal input
47, 48
MD0, MD1
I
CPU operation mode designation signal input (Connect to Vcc.)
49
MD2
I
CPU operation mode designation signal input (Connect to Vss.)
50
BUS ON
I
Bus on signal input L: bus on
51
BU IN
I
Backup on/off signal input H: backup on, L: backup off
52
CD SBSY
I
SUBQ sync signal input L: interruption
53
MEC SELFSW
I
Disc insert detection switch signal input L: disc in interruption
54, 55
NC
—
Not used. (Open)
56
UNISI
I
Serial data signal input
57
UNISO
O
Serial data signal output
58
UNICKI
I
Serial clock signal input
59
LINEOFF
O
Line off signal output
60
A ATT
O
Audio attenuation signal output H: ATT on
61
EJECT OK
I
Front panel open signal input H: eject
62
OPEN REQ
O
Front panel open/close request signal output H: open request
63
MECON
O
Mechanism deck power supply control signal output
64
CDON
O
Servo power supply control signal output
30
CDX-F50M
Pin No.
Pin Name
I/O
Pin Description
65
XUART
I
Sony-Bus/MC-Bus change signal input H: Sony-Bus, L: MC-Bus
66
ZMUTE
O
Zero detection mute signal output
67
MECON CHK
I
MECON rising detection signal input
68
CDON CHK
I
CDON rising detection signal input
69 to 74
NC
—
Not used. (Open)
75
RSTX
I
System reset signal input
76
NC
—
Not used. (Open)
77
X1A
—
Sub-clock connect pin Not used in this set. (Open)
78
X0A
—
Sub-clock connect pin Not used in this set. (Connect to Vss.)
79
VSS
—
Ground pin
80
X0
I
Main-clock connect pin (12 MHz)
81
X1
O
Main-clock connect pin (12 MHz)
82
VCC
—
Power supply pin (+3.3 V)
83
XTS
I
Not used in this set. (Open)
84
XINIT3
I
Not used in this set. (Open)
85
NC
—
Not used. (Open)
86
XSJIG
I
Not used in this set. (Open)
87 to 89
XINIT0 to 2
I
Not used in this set. (Open)
90 to 97
NC
—
Not used. (Open)
98
XLINE
I
Not used in this set. (Open)
99, 100
NC
—
Not used. (Open)
31
CDX-F50M
• IC401 TDA7419TR (ELECTRONIC VOLUME) (MAIN BOARD (1/3))
Pin No.
Pin Name
I/O
Pin Description
1
ACOUTR
O
AC coupling R-ch signal output
2
ACINR
I
AC coupling R-ch signal input
3
ACINL
I
AC coupling L-ch signal input
4
ACOUTL
O
AC coupling L-ch signal output
5
SE3L
I
Single-ended input 3 L-ch
6
SE3R
I
Single-ended input 3 R-ch
7
SE2L
I
Single-ended input 2 L-ch
8
SE2R
I
Single-ended input 2 R-ch
9
SE1L
I
Single-ended input 1 L-ch
10
SE1R
I
Single-ended input 1 R-ch
11
DIFFL
I
Pseudo differential stereo signal input left
12
DIFFG
I
Pseudo differential stereo signal input common
13
DIFFR
I
Pseudo differential stereo signal input right
14
CREF
O
Reference capacitor connect pin
15
GND
—
Ground pin
16
RL
O
Second rear L-ch signal output
17
OUTRF
O
Front R-ch signal output
18
OUTRR
O
Rear R-ch signal output
19
OUTLR
O
Rear L-ch signal output
20
OUTLF
O
Front L-ch signal output
21
MUTE
I
External mute signal input
22
SCL
I
I2C bus serial clock signal input
23
SDA
I/O
I2C bus serial data signal input/output
24
VDD
—
Power supply pin (+8 V)
25
SAIN
I
Spectrum analyzer clock signal input
26
SAOUT
O
Spectrum analyzer data signal output
27
VREF
O
Voltage reference signal output
28
RR
O
Second rear R-ch signal output
32
CDX-F50M
• IC801 MB90487APF-G-125-BNDE1 (SYSTEM CONTROL) (MAIN BOARD (3/3))
Pin No.
Pin Name
I/O
Pin Description
1
ATT
O
Audio mute control signal output
2 to 4
NC
—
Not used in this set. (Open)
5
BEEP
O
Beep signal output to power amp IC
6
VOL ATT
O
Electrical volume ATT control output
7
ILL
I
Illumination check signal input for auto dimmer
8 to 10
NC
—
Not used in this set. (Open)
11
VSS
—
Ground pin
12 to 14
NC
—
Not used in this set. (Open)
15
TU ATT
O
Tuner mute control output
16 to 20
NC
—
Not used in this set. (Open)
21
RE 0
I
Rotary encoder signal input 0
22
RE 1
I
Rotary encoder signal input 1
23
VCC+3.3
—
Power supply pin (+3.3 V)
24
EEP SIO
I/O
Serial data signal input/output for EEPROM communication
25
EEP SCK
O
Serial clock signal output for EEPROM communication
26
SA CLK
O
Serial clock signal output for spectrum analyzer to electronic volume IC
27
LCD CE
O
Chip enable signal output to LCD driver IC Flash: serial in
28
LCD SO
O
Serial data signal output to LCD driver IC Flash: UART serial out
29
LCD SCK
O
Serial clock signal output to LCD driver IC
30
NC
—
Not used in this set. (Open)
31
STB
O
Standby signal output to power amp IC
32
AUX
O
Not used in this set. (Open)
33
IIC SCK
O
IIC bus serial clock signal output
34
IIC SIO
I/O
IIC bus serial data signal input/output
35
VCC+3.3
—
Power supply pin (+3.3 V) (for A/D converter)
36
AVRH+3.3
—
External reference power supply (+3.3 V) (for A/D converter)
37
AVSS
—
Ground pin (for A/D converter)
38, 39
KEY IN0, 1
I
Key signal input
40
SA DATA
I
Serial data signal input to electronic volume IC
41
RC IN0
I
Rotary commander key signal input
42
VSS
—
Ground pin
43, 44
NC
—
Not used in this set. (Fixed at “L”.)
45
VSM
I
S meter voltage detect signal input
46
DST SEL
I
Destination select pin
47
KEY ACK
I
Key acknowledge detect signal input
48
NC
—
Not used in this set. (Open)
49, 50
MD0, 1
I
Input for operation mode designation (Fixed at “H”.)
51
MD2
I
Input for operation mode designation (Fixed at “L”.)
52
NC
—
Not used in this set. (Open)
53
BU IN
I
Back up power supply detect signal input
54
OPEN REQ
I
Open REQ signal input
55
NC
—
Not used in this set. (Open)
56
DIAG
I
Condition input from power amp IC
57
NC
—
Not used in this set. (Open)
58
UNI SI
I
Serial data signal input
59
UNI SO
O
Serial data signal output
60
UNI SCK
O
Serial clock signal output
61
BUS ON
O
Bus on signal output
62
SYS RST
O
System reset signal output
63
TEL ATT
I
TEL ATT detect input
64
ACC IN
I
Accessory power supply detect signal input
65
SIRCS
I
Remote control signal (infrared rays) input
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