Sony HCD-MD373 service manual Stereo

Pin No.	Pin Name	I/O			Function
50	STEREO	I		Stereo signal input from the tuner
51	TUNED	I		Tuned signal input from the tuner
52	ST-CE	O		Tuner chip enable output
53	ST-DOUT	O		Tuner data output
54	ST-DIN	I		Tuner data input
55	ST-CLK	O		Tuned clock output
56	SENS	I		BD Condition signal input
57	HDLD	O		Mode hold signal output
58	CD-LAT	O		CD latch signal output
59	CD-RESET	O		CD reset signal output
60	DISC-SENS	I		Slit sensor of disc table input
61	TABLE-SENS	I		CD table detection signal input
62	VCC	—	Power supply (+5V)
63	TABLE-L	O		Table motor control output (Not used)
64	VSS	—	Ground
65	TABLE-R	O		Table motor control output (Not used)
66	LOAD-OUT	O		Loading motor control signal output
67	LOAD-IN	O
68	UP-SW	I		Disc tray address detect encoder input
69	DISC-LED	I
70	IN-SW	I		Loading in signal input
71	OUT-SW	I		Loading out signal input
72	LED	O		CD play
73	LED	O		MD disc in
74	LED	O		MD play
75	LED	O		MD pass
76	LED	O		CD pass
77	LED	O		CD disc in
78	LED	O		MD REC
79	STANDBY	O		Stand by
80	LED	O		Timer select (Not used)
81	CD DATA	O		CD data signal output
82	CD CLK	O		CD clock signal output
83	REC OUT CONT	O		REC out control “L” : MUTE
84, 85	JOG A, JOG B	—	Not used
86	VOL A	I		Volume signal input A
87	VOL B	I		Volume signal input B
88	SIRCS	I		SIRCS signal input
89 to 91	KEY 0 to KEY 2	I		key input
92	MD-REC-R	I		MD REC level signal input (R)
93	HERDPHONE	I		Heardphone detect “H” : YES,	“L” : NO
94	MD-REC-L	I		MD REC level signal input (L)
95	MODEL-IN	I		MODEL input signal (Not used)
96	AG	—	Ground (Analog)
97	SPEC-IN	I		SPEC input
98	VREF	I		Reference voltage input
99	AVCC	I		+5.5V power supply
100	TEST	—

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