Sony MT-MZR70-165, MZ-R90/R91 service manual

Pin No.	Pin Name			I/O			Pin Description
					System reset signal input from the MPC18A31FTA (IC901) “L”: reset
43			XRST	I
					For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
44			VSS	—	Ground terminal
45			XTAL	O	Main system clock output terminal (16.9344 MHz)
46		EXTAL		I	Main system clock input terminal (16.9344 MHz)
47			VDD	—	Power supply terminal (+2.4 V)
48	TSB SLV CTL			I/O	Two-way control signal bus with TSB slave circuit					Not used (open)
49	SPDL START SW			O	Spindle servo start switching signal output to the analog switch (IC504, 505)
50	OPEN CLOSE SW			I	Upper panel open/close detect switch (S801) input terminal (A/D input)
					“L”: upper panel close, “H”: upper panel open
51	XSHOCK			I	Recording shock detect signal input from the CXD2660GA (IC502)
52			FOK	I	Focus OK signal input from the CXD2660GA (IC502)					“H”: is input when focus is on (“L”: NG)
53			SQSY	I	Subcode Q sync (SCOR) input from the CXD2660GA (IC502)
					“L” is input every 13.3 msec	Almost all, “H” is input
54		DQSY		I	Digital In U-bit CD format subcode Q sync (SCOR) input from the CXD2660GA (IC502)
					“L” is input every 13.3 msec	Almost all, “H” is input
55			XINT	I	Interrupt status input from the CXD2660GA (IC502)
56		T.MARK		I	T MARK switch (S803) input terminal
57	REC WBL SW			O	Stable control signal is output when recording
58		SERON		O	Series power supply control signal output to the MPC18A31FTA (IC901)
59		XCHG		O	Charge control signal output to the MPC18A31FTA (IC901)
60		XTEST		I	Setting terminal for the test mode		“L”: test mode, normally: fixed at “H”
61	SET CODE0			I	Destination setting terminal for the test mode
62	SET CODE1			I	Destination setting terminal for the test mode				Not used (open)
63	SET CODE2			I	Destination setting terminal for the test mode
64	REG CTL PWM			O	Synchronizing external clock signal output to the MPC18A31FTA (IC901)
65	VRM PWM			O	VREM power supply voltage control PWM signal output to the MPC18A31FTA (IC901)
66	VC PWM			O	System power supply voltage control PWM signal output to the MPC18A31FTA (IC901)
67	SPDL PWM			O	Spindle servo drive voltage control PWM signal output to the MPC17A56FTA (IC901)
					Reset signal output to the A/D, D/A converter (IC301), SN761056ADBT (IC501) and
68		XIC RST		O
					CXD2660GA (IC502) “L”: reset
69	REC LED			O	REC LED drive signal output terminal			Not used (open)
70			SI1	I	Joint text data input from the remote commander with headphone
71			SO1	O	Joint text data output to the remote commander with headphone Not used (open)
72			SCK1	O	Joint data communication clock output to the remote commander with headphone
					Not used (open)
73	XHOLD SW			I	HOLD switch (S804) input terminal			“L”: hold on, “H”: hold off
74			VDD	—	Power supply terminal (+2.4 V)
75			TEX	I	Sub system clock input terminal		Not used (open)
76			TX	O	Sub system clock output terminal		Not used (open)
77			VSS	—	Ground terminal
78		VBKAN		I	Sub power supply input terminal
79		S MON		I	Servo signal monitor input from the SN761056ADBT (IC501) (A/D input)
80	VB MON			I	Un-regulator power supply voltage monitor input terminal (A/D input)
81	CHG MON			I	Rechargeable battery voltage monitor input from the MPC18A31FTA (IC901) (A/D input)
82	VREF MON			I	Reference voltage monitor input from the SN761056ADBT (IC501) (A/D input)
83		WK DET		I	Set key starting detect signal input terminal (A/D input)
84	HALF LOCK SW			I	Open knob detect switch (S802) input terminal				“L”: normal position, “H”: open knob slid
85	RMC KEY			I	Remote commander with headphone key input terminal (A/D input)
86	SET KEY 1			I	Set key input terminal (A/D input)		(x, >, ., VOL +/– keys input)

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