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Sony MZ-R37 Service Manual page 23

Portable minidisc recorder
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Pin No.
Pin name
I/O
50
AV
—
Ground terminal for A/D converter.
SS
51
AVREF
I
A/D converter reference voltage input.
52
AV
—
A/D converter power supply terminal.
DD
53
VLG2-MNT
I
DSP power monitor signal.
54
TEMP
I
Temp meter (IC802) input.
55
KEY3
I
Key input.
56
KEY2
I
Key input.
57
KEY1
I
Key input.
58
XINT REC SW
I
Recording head position detect input.
59
UNREG MNT
I
2.8 V voltage monitor input.
60
BAT VC
I
Battery detect signal input.
61
FG IN
I
FG input from motor driver (IC503).
62
NC
—
Not used (Open).
63
FOK PORT
I
Focus OK signal input.
64
––––
—
Not used (Open).
65
LCD RESET
O
LCD reset signal output.
66
XJACKDET
I
LINE IN (OPTICAL) jack detection input.
67
OPT DET
I
LINE IN (OPTICAL) optical detection input.
68
XMIC DET
I
MIC (PLUG IN) jack detection.
69
(NC)
—
Not used (Open).
70
FSI (NC)
—
Not used (Open).
71
SPOFF
O
REC head motor control signal output.
72
RSI
O
73
RH PWM
O
RH constant current control signal output.
74
(NC)
—
Not used (Open).
75
DQSY
I
Subcode Q sync (SCOR) of digital in U-bit CD format from IC601.
76
T COUNT
I
Traverse count signal input.
77
SDI1
I
Serial data input.
78
SDO1
O
Serial data output.
79
SCK1
O
Serial clock output.
80
SQSY
I
SUB-Q/ADIP SYNC input.
81
BEEP
O
BEEP sound output control.
82
XLAT
O
Latch output.
83
NC
—
Not used (Open).
84
TEX
—
Not used (Fixed at "L").
85
TX
—
Not used (Fixed at "L").
86
V
—
Ground.
SS
87
V
—
Power supply pin (+2.8V).
DD
88
NC
—
Not used (Fixed at "H").
89
XCS ADA
O
A/D, D/A converter chip select output.
90
XPD ADA
O
A/D, D/A converter power down signal output. H : Power down
91
KEY ON
O
SLEEP : L, action : H.
92
XNIMH DET (NC)
—
Not used (Open). (Battery detect switch input.)
93
A MUTE
O
Analog mute control. H : Mute
94
XOPT CTL
O
Power supply control output for an optical input.
95
FFCLR
O
Flip flop clear signal output.
96
XCE NV
O
EEPROM chip select output.
97
SENS
I
SENS input.
98
LDON
O
"H" : APC circuit ON, "L" : APC circuit OFF
99
XSHOCK
I
Track jump detection input from IC601.
100
CLV STB
O
CLV drive control signal output.
Pin Description
– 23 –
– 24 –
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