Sony MDS-NT1 service manual Apc

MDS-NT1

Pin No.	Pin Name	I/O	Description
100	APC	O	Reference PWM signal output to the RF amplifier for the laser automatic power control
101	LDDR	O	PWM signal output terminal for laser digital automatic power control Not used
102	TRDR	O	Tracking servo drive PWM signal (–) output
103	TFDR	O	Tracking servo drive PWM signal (+) output
104	FFDR	O	Focus servo drive PWM signal (+) output
105	FRDR	O	Focus servo drive PWM signal (–) output
106	FS4	O	Clock signal (176.4 kHz) output terminal (X’tal system) Not used
107	SRDR	O	Sled servo drive PWM signal (–) output
108	SFDR	O	Sled servo drive PWM signal (+) output
109	SPRD	O	Spindle servo drive PWM signal (–) output
110	SPFD	O	Spindle servo drive PWM signal (+) output
111	FGIN	I	FG input terminal for spindle servo Not used
112 to 114	TST1 to TST3	I	Input terminal for the test
115	EFMO	O	EFM signal output terminal when recording mode “L” is output when playback mode
116	VDIO1	—	Power supply terminal (+3.3V) (for I/O)
117	VSIO1	—	Ground terminal (for I/O)
118	VDC4	—	Power supply terminal (+2.5V) (for core)
119	VSC4	—	Ground terminal (for core)
120	MDDT1	I	MD data mode selection signal input terminal
			“L”: normal mode, “H”: MD data mode (fixed at “L” in this set)

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