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Pin No.
Pin Name
41
R REC
42
B PLAY
43
BIAS
44
BEAT.C
45
B SOL
46
CPM
47
A SOL
48
TAPE MUTE
49
A/B
50
A EQ
51
MCONT A
52
MCONT B
53
VOL B
54
VOL A
55
LED STBY
56
LED TIMER
57
NC
58
OPEN SW
59
CLOSE SW
60
TD SW
61
TU SW
62
VCC(BU)
63
OPEN
64
VSS
65
CLOSE
66
BRKM
67
RTL
68
RTR
69
DC OFF
70
CD PROT
71
SLT SW
72
MLD
73
SQCK
74
SUBQ
75
D MUTE
76
XRST
77
PHTR
78
PS SW
79
TU ON/OFF
80
A-MUTE
81
ATT
82
POWER
83
SP RELAY
84
EV CLK
85
EV DATA
86
EMPHASIS
87
EPROM DATA
88
EPROM CLK
89
PROTECT
90
SPEANA
91
TYPE
92
BPH
93
APH
94,95
KEY3,KEY2
96
AVSS
97
KEY1
98
VREF
99
AVCC(BU)
100
PLL DATA
CIRCUIT DESCRIPTION
I/O
Description
I
B deck reverse recording prohibition detection switch.
I
B deck head position detection switch input.
O
Deck bias on/off changeover control.
O
Deck beat cancel on/off changeover control.
O
B deck solenoid control.
O
Deck capstan motor control.
O
A deck solenoid control.
O
Deck line mute control.
O
Deck A/B changeover control.
O
A deck play back equalizer control.
I
Multi control jog input 1.
I
Multi control jog input 2.
I
Volume encoder input 2.
I
Volume encoder input 1.
O
Control port of standby LED.
O
Control port of timer LED.
-
Unused.
I
CD open detection switch input.
I
CD close detection switch input.
I
Traverse down switch input port of CD mechanism.
I
Traverse up switch input port of CD mechanism.
-
u-com power supply(+5.0V).
O
CD motor control output.
-
GND.
O
CD motor control output.
O
CD motor control output.
O
Rotary motor opposite direction(CCW) output.
O
Rotary motor positive direction(CW) output.
O
Power control of CD DSP IC.
I
CD protection input(Only at selector CD).
I
CD start limit switch input.
O
CD DSP command load signal output.
O
CD sub code clock output.
I
CD sub code input.
O
CD DSP muting output.
O
CD DSP IC reset control.
I
CD mecha. Stop switch input.
Tray position & disc detector switch input port of
I
CD mechanism.
O
Tuner power on/off output.
O
Control port of audio muting.
O
-10dB attenuation output.
O
Power relay control.
O
Control port of speaker relay.
O
Clock output to E..volume.
O
Data output to E..volume.
O
Tuner emphasis output.
O
Expander ROM data output.
O
Expander ROM clock output.
I
Detection port of protection.
I
Input port of music signal.
I
Discrimination of tuner destination.
I
B deck reel sensor input.
I
A deck reel sensor input.
I
A/D key input(key3,key2).
-
GND.
I
A/D key input(key1).
-
A/D reference voltage input.
-
u-com power supply(+5.0V).
O
PLL IC data output.
RXD-303/353/503/553/653/A33/A53
ACTIVE
H
L
ON
OFF
ON
OFF
MUTE ON
B
A
OFF
ON
OFF
ON
ON
OFF
NORMAL
PRO. ON
RESET
ON
OFF
9
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