Read Sony CDX-M850MP Service Manual online
22
CDX-M850MP
Pin No.
Pin Name
I/O
Pin Description
53
CD LM EJ
O
CD eject motor control signal output Not used. (Open)
54
CD RST
O
CD servo reset signal output
55
CD AO
O
CD servo command/parameter discri. output Not used. (Open)
56
CD STB
O
CD servo data strobe signal output Not used. (Open)
57
CD TSTB
O
CD servo text strobe signal output Not used. (Open)
58
CD RFOK
I
CD servo RFOK signal input
59
CD XTALEN
O
CD servo crystal OSC control signal output Not used. (Open)
60
VCC2
—
Power supply pin (+5V)
61
RESET OUT
O
Display CPU reset signal output
62
VSS
—
Ground
63
TEST IN
I
Test mode setting detect signal input
64
BUS ON
O
BUS ON control signal output
65
SYS RST
O
System reset signal output
66
BUS/AUX
O
BUS/AUX select control signal output
67
LINK OFF
O
Link OFF control signal output
68
ACC IN
I
Accessory key ON detect signal input
69
ILL IN
I
Ilumination line detect signal input
70
RC IN1
I
Rotary commander signal input 1
71
NCO
O
Not used. (Open)
72
CD SELF SW
I
CD self SW detect signal input
73
TU ATT IN
I
Tuner mute control signal input
74
CLOSE SW
I
Front panel close detect signal input
75
OPEN SW
I
Front panel open detect signal input
76
I-DET
I
Front panel current detect signal input
77
MOT–
O
Front panel open/close control signal output
78
MOT+
O
Front panel open/close control signal output
79
ROMC EN
I
ROM correction enable signal input
80
QUALITY
I
Tuner noise detect signal input
81
MPTH
I
Tuner multi-path signal input
82
VSM
I
S-meter signal input
83
SA IN
I
SA data input
84
KEY IN1
I
Key signal input 1
85
KEY IN0
I
Key signal input 0
86
RC IN0
I
Rotary commander signal input 0
87
KEY ACK2
I
Key acknowledge detect signal input 2
88
KEY ACK0
I
Key acknowledge detect signal input 0
89
KEY ACK1
I
Key acknowledge detect signal input 1
90
OPEN KEY
I
Open key detect signal input
91
RAM BU
I
RAM reset detect signal input
92
FLD ON
O
FL driver power supply ON/OFF signal output
93
FL ON
O
FL power supply ON/OFF signal
94
AVSS
—
Ground
95
DISP CE
O
Display CPU chip enable output
96
VREF
—
A/D converter reference voltage (+5V)
97
AVCC
—
Power supply pin (+5V)
98
DISP SI/RX
I
Display CPU BUS data input
99
DISP SO/TX
O
Display CPU BUS data output
100
DISP CKO
O
Display CPU BUS clock output
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