Sony XR-M510 service manual Accin

XR-M510

Pin No.	Pin Name		I/O					Description
77		BU-IN	I	Battery detection signal input from the SONY bus interface (IC501) and battery detect circuit
				“L” is input at low voltage
78		NC	O	Not used (open)
79		KEYACK	I	Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
				and eject keys in the power off status			On at input of “H”
80		AD ON		A/D converter power control signal output terminal
			O	When the KEYACK (pin ul) that controls reference voltage power for key A/D conversion input
				is active, “L” is output from this terminal to enable the input
81		ACCIN	I	Accessory detection signal input terminal “L”: accessory on
82	FLS PWON		O	Power on/off control signal output of the illumination LED and liquid crystal display driver
				(IC901, 902) “H”: power on
83		PW-ON	O	Main system power supply on/off control signal output terminal						“H”: power on
84		TESTIN	I	Setting terminal for the test mode		“L”: test mode, Normally: fixed at “H”
85		RAMBU	I	Internal RAM reset detection signal input from the RN5VD33AA (IC603)
				Input terminal to check that RAM data are not destroyed due to low voltage
				This checking is made within 100 msec after reset
86		HSTX	I	Hardware standby input terminal		“L”: hardware standby mode				Reset signal input in this set
87		MD2	I	Setting terminal for the CPU operational mode (fixed at “L” in this set)
88		MD1	I	Setting terminal for the CPU operational mode (fixed at “H” in this set)
89		MD0	I	Setting terminal for the CPU operational mode (fixed at “H” in this set)
90		RST	I	System reset signal input from the reset signal generator (IC602) and reset switch (S901, 902)
				“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
91		VSS	—	Ground terminal
92		X0	I	Main system clock input terminal (3.68 MHz)
93		X1	O	Main system clock output terminal (3.68 MHz)
94		VCC	—	Power supply terminal (+5V)
95		ILLIN	I	Auto dimmer control illumination line detection signal input terminal
				“L” is input at dimmer detection
96		I-DET		Detection signal input from the motor overload detection circuit for the front panel open/close
			I	motor (M601)
				“L” is input when the motor current exceeds the specified value
97		MOT–	O	Front panel open/close motor (M601) drive signal (in panel close direction) output to the
				BA6288FS (IC502)	“H” active	*2
98		MOT+	O	Front panel open/close motor (M601) drive signal (in panel open direction) output to the
				BA6288FS (IC502)	“H” active	*2
99	CLOSE SW		I	Front panel open/close detect switch input terminal					“L” is input when the front panel is closed
100	OPEN SW		I	Front panel open/close detect switch input terminal					“L” is input when the front panel is opened
101 to 103		NC	I	Not used (fixed at “H”)
104, 105	DSTSEL1,		I	Destination setting terminal (A/D input)				*3
		DSTSEL2
106		BOOT	O	Serial data output to the liquid crystal display drive controller (IC607)
107	DSP GAIN		O	Not used (open)
108		DSP ON	O	Power supply on/off control signal output terminal					“H”: DSP on	Not used (open)
109		NC	O	Not used (open)
110		EMPH-IN	I	Emphasis control signal input terminal				Not used (fixed at “L”)
111	PACK SW		I	Cassette in/out detect switch (S901)			“L”: cassette in
112		4V SEL	I	Input terminal of whether line driver is mounted or not is detected
				“H”: line driver is not mounted
113		P SEL	I	Power select input terminal Not used (fixed at “L”)

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