Sony MDS-JE630 service manual

Pin No.	Pin Name	I/O		Description
79	SCL	O	Clock signal output to the EEPROM (IC171)
			Recording data output enable signal output to the CXD2656R (IC121) and overwrite head
80	SCTX	O	driver (IC181) Writing data transmission timing output (Also serves as the magnetic head on/off
			output)
81	CLOCK SET0	I	Destination setting terminal (fixed at “L” in this set)
82	CLOCK SET1	I	Destination setting terminal (fixed at “H” in this set)
83	LED0	O	LED drive signal output terminal	Not used (open)
84	LED1	O	LED drive signal output terminal	Not used (open)
85, 86	NC	O	Not used (open)
87	MODEL SEL0	I	Setting terminal for the model (fixed at “L” in this set)
88	MODEL SEL1	I	Setting terminal for the model (fixed at “L” in this set)
89, 90	NC	O	Not used (open)
91	TIMER	I	TIMER switch (S751) input terminal (A/D input)
			“L”: PLAY, “H”: REC (OFF: center voltage)
92	SOURCE	I	INPUT switch (S741) input terminal (A/D input)
93	KEY3	I	Key input terminal (A/D input)	S731 and S732 (TIME, PITCH CONTOROL keys input)
94	KEY2	I	Key input terminal (A/D input)	S721 to S726 (¤ EJECT, PLAY MODE, REPEAT, SCROLL,
			LEVEL/DISPLAY/CHAR, I/u keys input)
95	KEY1	I	Key input terminal (A/D input)
			S711 to S714 (MENU/NO, YES, PUSH ENTER, CLEAR keys input)
96	AVSS	—	Ground terminal
97	KEY0	I	Key input terminal (A/D input)	S701 to S706 (REC r , p, ), 0, P, á keys input)
98	VREF	I	Reference voltage (+3.3V) input terminal (for A/D converter)
99	+3.3V	—	Power supply terminal (+3.3V) (for analog system )
100	MONO/ST	I	REC MODE switch (S746) input terminal “L”: MONO, “H”: STEREO

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