Sony XR-M510 service manual Avcc

XR-M510

Pin No.	Pin Name	I/O			Description
40	MREF	O		Front panel open/close motor (M601) speed control signal output to the BA6288FS (IC502)
41	NC	O		Not used (open)
42	AVCC	—	Power supply terminal (+5V) (for analog system)
43	AVRH	I		Reference voltage (+5V) input terminal (for A/D converter)
44	AVRL	I		Reference voltage (0V) input terminal (for A/D converter) Not used (fixed at “L”)
45	AVSS	—	Ground terminal (for analog system)
46	KEYIN0			Key input terminal (A/D input) (LSW901 to LSW912, S900)
		I		TA, SOUND, D-BASS, MENU, DISC +, . m, LIST, > M, ENTER, DISC –, CLOSE,
				OPEN, Z keys input
47	KEYIN1	I		Key input terminal (A/D input) (LSW913 to LSW919, LSW921 to LSW925, S902)
				6 to 3, SHUF 2, REP 1, AF, +, PTY DSPL, –, OFF, SOURCE, MODEo keys input
48	RCIN0	I		Rotary remote commander key input terminal (A/D input)
49	NC	O		Not used (open)
50	QUALITY	I		Noise level detection signal input at SEEK mode (A/D input)
51	FMAGC	I		FM AGC detection signal input from the FM/AM tuner unit (TUX100) (A/D input)
52	MPTH	I		Multi-path detection signal input from the RDS decoder (IC700) (A/D input)
53	VSM	I		FM and AM signal meter voltage detection input from the FM/AM tuner unit (TUX100)
				(A/D input)
54	VCC	—		Power supply terminal (+5V)
55	ST-BY	O		Standby on/off control signal output terminal “L”: standby mode, “H”: amplifier on
56	NS-MASK	O		Discharge control signal output for the noise detection circuit “H”: discharge
57	REEL	I		Rotation detect signal input from supply reel sensor and take-up reel sensor on the deck
				mechanism
58	OPEN	I		Not used (open)
59	TAPE ON	O		Tape system power supply on/off control signal output terminal “H”: tape on
60	LMEJ	O		Motor drive signal output to the loading/tape operation motor drive (IC400)			“H” active
				(For the eject direction and reverse side operation) *1
61	LMLOD	O		Motor drive signal output to the loading/tape operation motor drive (IC400)			“H” active
				(For the loading direction and forward side operation)		*1
62	CM ON	O		Capstan/reel motor (M901) drive signal output terminal		“H”: motor on
63	VSS	—		Ground terminal
64	POS0	I
				Tape position (EJECT/FF/REW/REV/	POS0: “L”: EJECT mode, “H”: others mode
65	POS1	I
					POS1: “L”: FF and FWD mode, “H”: others mode
				FWD mode) detect input from the tape
66	POS2	I			POS2: “L”: REW mode, “H”: others mode
				operation switch on the deck mechanism
					POS3: “L”: REV and EJECT mode, “H”: others mode
67	POS3	I
68	NC	O		Not used (open)
69	FLASH-W	I		Internal flash memory data write mode detection signal input terminal “L”: data write mode
				Not used (pull up)
70	I2CSIO	I/O		Two-way data I2C bus with the FM/AM tuner unit (TUX100), RDS decoder (IC700) and electrical
				volume (IC100)
71	I2CCKO	O		I2C bus clock signal output to the FM/AM tuner unit (TUX100), RDS decoder (IC700) and
				electrical volume (IC100)
72	RCIN1	I		Rotary remote commander shift key input terminal
73	X1A	O		Sub system clock output terminal (32.768 kHz)
74	X0A	I		Sub system clock input terminal (32.768 kHz)
75	DAVN	I		Data transmit completed detection signal input from the RDS decoder (IC700) “H” active
76	CDON-IN	I		CD/MD on/off control signal input terminal (fixed at “L” in this set)

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