Read Sony CDX-MP450X Service Manual online
15
CDX-MP450X
Pin No.
Pin Name
I/O
Pin Description
63
SENS
I
Sensitivity input from DSP IC (IC516).
64
IN SW
I
Disc in switch input
65, 66
N.C
—
Not used. (Fixed at H in this set)
67
MP3
I
MP3 playback control input (H: not playback, L: playback)
68
PH3
I
Photo coupler input 3 (Not used in this set)
69
SCLK
O
Serial clock output to DSP IC (IC516).
70
LM LOADING
O
Loading motor loading (CD tray close) output
71
TV RST
O
TV encoder IC reset output (Not used in this set)
72
N.C
—
Not used. (Open)
73
TE CANCEL
O
Tracking error offset cancel output of RF amplifier. (Not used in this set)
74
FE CANCEL
O
Focus error offset cancel output of RF amplifier. (Not used in this set)
75
BU IN
I
Back-up power supply input
76
SCOR
I
SCOR input from DSP IC (IC516).
77
MSO
I
Serial input from master microcomputer IC (IC801).
78
MSI
O
Serial output to master microcomputer IC (IC801).
79
MSC
I
Serial clock input from master microcomputer IC (IC801).
80
MCS
I
Chip select input from master microcomputer IC (IC801).
81
LM EJECT
O
Loading motor eject (CD tray open) output
82
DRV OE
O
Mute control output for driver IC (IC512).
83
MD2
O
Check output for operation mode. (Not used in this set)
84
TEX
I
Not used. (Connect to VSS)
85
TX
O
not used. (Open)
86
VSS
—
Digital ground
87
VDD
—
Digital power supply pin
88
N.C
—
Not used. (Fixed at H in this set)
89
H R/W
O
Read/Write select output for MPEG decoder IC (IC514). (H: Read, L: Write)
90
H RD
O
Mode select output for MPEG decoder IC (IC514) at read. (H: Multiflux, L: Individual)
91 – 93
HADDR2 – 0
O
Host address 2 – 0 output for MPEG decoder IC (IC514).
94
H CS
O
Host chip select output for MPEG decoder IC (IC514).
95
N.C
—
Not used. (Open)
96
H RST
O
Host reset output to MPEG decoder IC (IC514).
97 – 99
N.C
—
Not used. (Open)
100
CDM ON
O
CD mechanism deck loading motor power supply control output (8 V).
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