Sony MDS-PC2 service manual Pb-P

Pin No.		Pin Name	I/O		Function
60	PB-P		I	Detection signal input from the playback position detection switch
61	REC/PB		O	Not used Write: “H”
62	+3.3V		—	+3.3V power supply
63	NC		O	Not used (Fixed at “L”)
64	GND		—	Ground
65	SDA		I/O	Data signal input/output pin with the backup memory
66	MNT3 (SLOCK)		I	In the state of spindle servo lock from the CXD2564R
67	WR PWR		O	Write power ON/OFF output
68	PROTECT		I	Recording-protection claw detection input from the protection detection switch
				Protect: “H”
69	REFLECT		I	Disk reflection rate detection input from the reflect detection switch
				Disk with low reflection rate: “H”
70	LDON		O	Laser ON/OFF control output	“H”: Laser ON
71	SENS		I	Internal status (SENSE) input from the CXD2654R
72	NMT1 (SHOCK)		I	Track jump signal input from the CXD2654R
73	DIG-RST		O	Digital rest signal output to the CXD2654R and motor driver Reset: “L”
74	MNT2 (XBUSY)		I	In the state of executive command from the CXD2654R
75	XLATCH		O	Latch signal output to the serial bus
76	MOD		O	Laser modulation switching signal output
77	LIMIT-IN		I	Detection input from the limit switch
				Sled limit-In: “L”
78	MNT0 (FOK)		I	Focus OK signal input from the CXD26504R
				“H” is input when focus is on
79	SCL		O	Clock signal output to the backup memory
80	SCTX		O	Writing data transmission timing output to the CXD2654R
				Shared with the magnetic head ON/OFF output
81	CLKSET0		I	Clock destination select pin	US, Canadian: “L”, Except US, Canadian :“H”
82	CLKSET1		I	Clock destination select pin	US, Canadian: “H”, Except US, Canadian :“L”
83	LED0		O
84	LED1		O
85	OPT DEL		O	Not used
86	OPT SEL		O
87	MODE SEL 0		I
88	MODE SEL 1		O
89			O
	REC
90	BEEP SW		O	Beep switch
91	NC		I
92	NC		I	Not used
93	KEY 3		I
94	KEY 2		I
95	KEY 1		I	Key input pin (A/D input)
96	AVSS		—	Ground (Analog)
97	KEY0		I	Key input pin (A/D input)
98	VREF		—	A/D reference voltage (Fixed at “H”)
99	+3.3V		—	+3.3V power supply
100	MONO/ST		I	Monaural, stereo change input Monaural: “L”

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