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Port No.
Port Name
41
VPP
42
MDATA
43
STAT
44
MCLK
45
MLD
46
SUBQ
47
SQCK
48
EEP SDA
49
EEP SCL
50
HI SPEED
51
OPEN
52
CLOSE
53
MD CE
54
MD RST
55
INI MD SW
56
BACK CHK
57
BACK ON
58
MD IN SW
59
60
PLAY SW
61
CrO2 SW
62
HALF SW
63
REC F SW
64
CPM
65
REC R SW
TE
L 13942296513
66
SOL
67
LMUTE
68
A/B-1
69
A/B-2
70
Bø/¿
71
NOR
72
BIAS
73
74
BEAT_C
75
76
EVCLK
77
EVDATA
78
79,80
81
LED STBY GRN
82
LED STBY RED
83,84
85
CD POWER
86
AMP ON/OFF
87
AMUTE
88
POWER
89~92
93
94
95
GND
www
96
PLL DATA
97
PLL CLK
98
PLL DO
.
99
PLL CE
100
DAVDD
CIRCUIT DESCRIPTION
I/O
-
Microcomputer power supply (+5v).
O
CD DSP command data output.
I
CD DSP status signal input.
O
CD DSP command clock signal output.
O
CD DSP command load signal output.
I
CD sub code input.
O
Clock output for CD sub code.
-
Unused.
-
Unused.
-
Unused.
-
Unused.
-
Unused.
I
Detection port for MD back up.
I
Reset output from MD mechanism.
I
Unused.
-
Unused.
-
Unused.
I
Load switch input for MD disc.
NC
-
Unused.
I
Detection switch input of head position for deck.
-
Unused.
I
Cassette half switch input.
I
Deck forward recording switch input.
O
Control port of capstan motor for deck.
I
Deck reverse recording switch input.
O
Control port of solenoid for deck.
O
Deck line mute control.
O
Deck recording mute & head select control 1.
O
Deck recording mute & head select control 2.
-
Unused.
-
Unused.
O
Control port of bias on/off for deck.
R/P
O
Deck recording & playback changeover.
O
On/off control port of beat cancel for deck.
NC
O
Unused.
O
Sound controller clock output.
O
Sound controller data output.
ST
-
Unused.
NC
-
Unused.
O
Standby led(green) control port.
O
Standby led(red) control port.
NC
-
Unused.
O
CD DSP power on/off changeover control.
O
On/off control port for amplifier circuit.
O
Audio mute output.
O
Power relay control.
NC
-
Unused.
ST
I
Stereo detector input.
SD
I
SD detector input.
-
Connected to ground.
O
PLL IC data output.
x
ao
O
PLL IC clock output.
y
I
PLL IC data input.
i
O
PLL IC chip enable output.
I
D/A converter positive voltage.
8
Description
Q Q
3
6 7
1 3
u163
.
MDX-G3
2 9
9 4
2 8
Active
H
OFF
OFF
1 5
0 5
8
2 9
9 4
ON
ON
Recording
ON
OFF
OFF
ON
m
co
9 9
L
ON
ON
2 8
9 9
OFF
Playback
OFF
ON
ON
OFF
7
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