Sony MZ-R50 - MD Walkman MiniDisc Recorder Service Manual page 38

Pin No. Pin name
51 AVREF
52 AV
DD
53 AM3 MNT
54 TEMP
55 KEY3
56 KEY4
57 KEY0
58 KEY1
59 UNREG MNT
60 LIP MNT
61 FG IN
62 SLA
63 SLB
64 INT SW
65 PACK IN
66 JACKDET
67 OPT DET
68 MIC DET
69 XLAT
70 KEY ON
71 ST1 A
72 ST2 A
73 ––––
74 ––––
75 DQSY
76 T COUNT
77 SDI1
78 SDO1
79 SCK1
80 SQSY
81 BEEP
82 XLIP DET
83 REFLCT
84 TEX
85 XT
86 V
SS
87 V
DD
88 NC
89 XCS ADA
90 XPD ADA
91 ST1B
92 ST2B
93 A MUTE
94 OPT CONT
95 CS EVR
96 CS NV
97 SCK2
98 –––––––
99 SDO2
100 XLIP
I/O
I A/D converter reference voltage input.
– A/D converter power supply terminal.
I AC adaptor or EXT battery detection input.
I Temp meter (IC803) input.
I PLAY/REC key input.
I Key input.
I Key input.
I Key input.
I UNREG voltage monitor.
I Voltage monitor for lithium battery.
I FG input from motor driver (IC701).
I
JOG dial signal input.
I
I INITIAL switch input.
I MEDIA switch input.
I Input jack detection input.
I Detecting input an optical input.
I MIC jack detection.
O Latch output.
O TRACK MARK jack input.
O
Stepping motor control signal output.
O
– Not used (Open).
– Not used (Open).
I Subcode Q sync (SCOR) of digital in U-bit CD format from IC503.
I Traverse count signal input.
I Serial data input.
O Serial data output.
O Serial clock output.
I SUB-Q/ADIP SYNC input.
O BEEP sound output control.
I This is at "L" level when using the lithium battery or with no sensor switch input.
I CD/MO discrimination switch.
– Not used (Fixed at "L")
– Not used (Open).
– Ground.
– Power supply pin (+2.8V).
– Not used (Fixed at "H")
I Chip select input.
O D/A converter power down detect during recording.
O
Stepping motor control signal output.
O
O Analog mute control.
O Power supply control output for an optical input.
O
Chip select output.
O
O Serial clock output.
O HF module control output. (Not used : open)
O Serial data output.
O Charge control. H : Charge
– 38 –
Description
L : EXT battery
H : BEEP sound output
L : Mute
H : Power down