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

Pin No.	Pin Name	I/O	Pin Description
108	VDC4	—	Power supply terminal (+1.8 V) (for internal logic)
109	TRDR	O	Tracking servo drive PWM signal (–) output to the MPC17A56FTA (IC601)
110	TFDR	O	Tracking servo drive PWM signal (+) output to the MPC17A56FTA (IC601)
111	FFDR	O	Focus servo drive PWM signal (+) output to the MPC17A56FTA (IC601)
112	FRDR	O	Focus servo drive PWM signal (–) output to the MPC17A56FTA (IC601)
113	FS4	O	Clock signal (176.4 kHz) output to the MPC18A21MTB (IC603) (X' tal system)
114	SRDR	O	Sled servo drive PWM signal (–) output terminal	Not used (open)
115	SFDR	O	Sled servo drive PWM signal (+) output terminal	Not used (open)
116	VSC4	—	Ground terminal (for internal logic)
117	SPRD	O	Spindle servo drive PWM signal (–) output terminal		Not used (open)
118	SPFD	O	Spindle servo drive PWM signal (+) output terminal		Not used (open)
119	FGIN	I	FG signal input terminal for spindle servo Not used (open)
120 to 122	TEST1 to TEST3	I	Input terminal for the test (normally : fixed at “L”)
123	EFMO	O	EFM signal output when recording mode to the MPC18A21MTB (IC603)
124	SPVS	O	Spindle servo drive voltage control signal output to the MPC17A56FTA (IC601)
125	VDIO3	—	Power supply terminal (+2.4 V) (for I/O)
126	VSIO3	—	Ground terminal (for I/O)
127	SPDU	O	Spindle servo (U) drive signal output to the MPC17A56FTA (IC601)
128	SPDV	O	Spindle servo (V) drive signal output to the MPC17A56FTA (IC601)
129	SPDW	O	Spindle servo (W) drive signal output to the MPC17A56FTA (IC601)
130	SPCU	I	Spindle servo (U) timing signal input from the MPC17A56FTA (IC601)
131	SPCV	I	Spindle servo (V) timing signal input from the MPC17A56FTA (IC601)
132	SPCW	I	Spindle servo (W) timing signal input from the MPC17A56FTA (IC601)
133	SLDU	O	Sled servo (U) drive signal output to the MPC17A56FTA (IC601)
134	SLDV	O	Sled servo (V) drive signal output to the MPC17A56FTA (IC601)
135	SLDW	O	Sled servo (W) drive signal output to the MPC17A56FTA (IC601)
136	VDC5	—	Power supply terminal (+1.8 V) (for internal logic)
137	VSC5	—	Ground terminal (for internal logic)
138	SLCU	I	Sled servo (U) timing signal input from the MPC17A56FTA (IC601)
139	SLCV	I	Sled servo (V) timing signal input from the MPC17A56FTA (IC601)
140	SLCW	I	Sled servo (W) timing signal input from the MPC17A56FTA (IC601)
141	SLVS	O	Sled servo voltage control signal output to the MPC17A56FTA (IC601)
142	BYPS	O	By-pass transistor control signal output to the MPC17A56FTA (IC601) Not used (open)
143	VSSDRAM	—	Ground terminal (for internal 16M bit D-RAM)
144	VDDDRAM	—	Power supply terminal (+2.4 V) (for internal 16M bit D-RAM)

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