Sony XR-CA600X, XR-CA600V service manual Busso

XR-CA600/CA600V/CA600X

Pin No.	Pin Name		I/O			Description
40	TELATT		I	Telephone attenuate signal input		At input of “H”, the signal is attenuated by –20 dB
41		NIH	I	Not used (fixed at “H”)
42	BUSSO		O	Serial data output to the SONY bus interface (IC581)
43	BUSSI		I	Serial data input from the SONY bus interface (IC581)
44	BUSCKO		O	Serial data transfer clock signal output to the SONY bus interface (IC581)
45	IIC SIO		I/O	Two-way data IIC bus with the FM/AM tuner unit (TU1), RDS decoder (IC51) and electrical
				volume (IC331)
46		NCO	O	Not used (open)
47	IIC CKO		O	IIC bus clock signal output to the FM/AM tuner unit (TU1), RDS decoder (IC51) and electrical
				volume (IC331)
48	AMPON		O	Standby on/off control signal output to the power amplifier (IC751)
				“L”: standby mode, “H”: amplifier on
49	AMPATT		O	Muting on/off control signal output to the power amplifier (IC751) “L”: muting on
50		ATT	O	Audio line muting on/off control signal output			“H”: muting on
51		NCO	O	Not used (open)
52	AMSON		O	Tape auto music sensor control signal output to the CXA2509AQ (IC301)
				“L”: auto music sensor on
53	F/ROUT		O	Forward/reverse control signal output to the CXA2509AQ (IC301)
				“L”: reverse direction, “H”: forward direction
				METAL control in/out terminal
54	MTLON		O	At initial mode: valid/invalid selection input of METAL function (valid at “L” input)
				At normal mode: METAL on/off control signal output to the CXA2509AQ (IC301)
				(METAL on at “H” output)
55	TAPATT		O	Tape muting on/off control signal output to the CXA2509AQ (IC301)				“H”: muting on
				Active at ATA, FF/REW mode
56		NCO	I/O	Dolby control in/out terminal	Not used (pull down)
57	AMSIN		I	Whether a music is present or not from CXA2509AQ (IC301) is detected at auto music sensor
				“L”: music is present, “H”: music is not present
58	4VPRE		I	4V PREOUT setting terminal	“L”: 4V PREOUT on Fixed at “H” in this set
59	VOLATT		O	Pre amplifier muting on/off control signal output to the electrical volume (IC331)
				“L”: muting on
60 to 64		NCO	O	Not used (open)
65		FL_W	I	Internal flash memory data write mode detection signal input terminal				“L”: data write mode
				Not used (open)
66	TESTIN		I	Setting terminal for the test mode		“L”: test mode, normally fixed at “H”
67	RCIN1		I	Rotary remote commander shift key input terminal “L”: shift key on
68 to 73		NCO	O	Not used (open)
74	EEP SIO		I/O	Two-way data bus for tuner EEPROM with the FM/AM tuner unit (TU1)
75	EEP CKO		I/O	Two-way bus clock signal for tuner EEPROM with the FM/AM tuner unit (TU1)
76	COLSEL		I	Setting terminal for the illumination color
				“L”: amber, “H”: green Fixed at “L” in this set
77		NCO	O	Not used (open)
78	DOORSW		I	Front panel open/close detection signal input			“L” is input when the front panel is closed
79	DOORIND		O	LED drive signal output of the MD disc slot illumination and Zindicator (LED810, LSW810)
				“H”: LED on “H” is output to turn on the LED when front panel is opened
80, 81	RE IN1, RE IN0		I	Dial pulse input of the rotary encoder (RE901) (for VOLUME control)
82	AD ON			A/D converter power control signal output terminal
			O	When the KEYACK (pin wh) that controls reference voltage power for key A/D conversion input
				is active, “L” is output from this terminal to enable the input

27