Read Sony CDX-MP450X Service Manual online
14
CDX-MP450X
SECTION 3
DIAGRAMS
3-1. IC PIN DESCRIPTIONS
• IC513 CXP81960M-671R (CD SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
A MUTE
O
Audio mute control output
2
N.C
—
Not used. (Open)
3
CD ON
O
CD servo power supply control output (H: Power on)
4
RW/R
O
RF amplifier gain control output (H: CD-RW, L: CD-R/CD-DA)
5
SLD MINUS
O
Sled motor control output
6
SELF SW
I
Disc self store switch (SW1) input
7
E/(U)
I
Destination setting input (Fixed at H in this set)
8
PH1
I
Photo coupler input 1 (Not used in this set)
9
SDA
I/O
I2C interface data input/output for video encoder IC. (Not used in this set)
10
SCL
O
I2C interface clock output to video encoder IC. (Not used in this set)
11
H WAIT
I
Wait input from MPEG decoder (Host) IC (IC514).
12
H INT
I
Interruption input from MPEG decoder IC (IC514).
13 – 20
HDATA7 – 0
I/O
Host data 7 – 0 input for MPEG decoder IC (IC514).
21
EMPH O
O
D/A converter emphasis control output to DSP IC (IC516).
22
CD DATA
O
Data output to CD servo IC (IC516).
23
CD XTAL
O
System latch output to CD servo IC (IC516).
24
CD CKO
O
Clock output to CD servo IC (IC516).
25
D SW
I
Disc switch (SW3) input
26
N.C
—
Not used. (Fixed at H in this set)
27
LIMIT SW
I
Sled limit switch (SW4) input (L: ON)
28
SUBQ
I
CD sub-Q serial data input from DSP IC (IC516).
29
N.C
—
Not used. (Open)
30
SQCK
O
Sub-Q clock output to DSP IC (IC516).
31
N.C
—
Not used. (Open)
32
MSRQ
O
Serial request output to master microcomputer (IC801).
33
N.C
—
Not used. (Open)
34
CD RST
O
CD reset output to DSP IC (IC516). (L: Reset)
35, 36
N.C
—
Not used. (Open)
37
MP
I
Connect to VSS.
38
RESET
I
Slave microcomputer hard reset input from system control IC (IC801).
39
VSS
—
Ground
40
XTAL
O
Crystal oscillation output (12 MHz)
41
EXTAL
I
Crystal oscillation input (12 MHz)
42
N.C
—
Not used. (Fixed at H in this set)
43
TEXT IN
I
CD text deter input
44
N.C
—
Not used. (Open)
45
TEXT CLK
O
CD text clock output
46 – 49
N.C
—
Not used. (Open)
50
AVSS
—
Analog ground
51
AVREF
—
Analog power supply reference input
52
AVDD
—
Analog power supply pin
53
GFS/MNT2 SEL
I
GFS/MNT2 select input of DSP IC. (Fixed at H in this set)
54
PH2
I
Photo coupler input 2 (Not used in this set)
55
FOK
I
Focus OK input from DSP IC (IC516).
56
GFS
I
Guard frame synchro input from DSP IC (IC516).
57, 58
N.C
—
Not used. (Fixed at L in this set)
59
TEMP H
I
Not used. (Open)
60
TEMP L
I
Not used. (Open)
61
LOCK
I
Lock input from DSP IC (IC516).
62
TEST MODE
I
Not used. (Fixed at H in this set)
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