Sony HCD-MD373 service manual IC501 Master Control M30620ECFP-A21 Main board

• IC501 MASTER CONTROL (M30620ECFP-A21) (MAIN board)

Pin No.	Pin Name	I/O		Function
1	STK-POWER	O		Power amp ON/OFF signal output
2	P	O		Power ON/OFF signal output (Not used)
3	F-RY	O		Front speaker relay control output
4	R-RY	O		Rear speaker relay control output (Not used)
5	CD-POWER	O		CD power on signal output
6		O		Line mute ON/OFF signal output
	TA-MUTE
7	DBFB-H	O		DBFB H/L select signal output (Not used)
8, 9	—	—	Not used
10	SUBXIN	I		X’tal (32.768kHz) input
11	SUBXOUT	O		X’tal (32.768kHz) output
12	RESET	I		Reset signal input
13	X-OUT	O		X’tal (16MHz) output
14	VSS	—	Ground
15	X-IN	I		X’tal (16MHz) input
16	VCC	—	Power supply (+5V)
17	NMI	I		Not used (PULL UP EVER+5V)
18	WAKE UP	I		WAKE UP (Fixed at fixed at “L”)
19	SCOR	I		Subcode data request signal output
20	RDS-INT	I		RDS data input
21	RDS-DATA	I
22	AC-CUT	I		AC power cut detection signal input
23	PL-CLK	O		Clock signal to pro-logic (Not used)
24	PL-DATA	O		Data signal to pro-logic (Not used)
25	PL-LAT	O		Latch signal to pro-logic (Not used)
26	TIMER LED	O		Timer LED ON/OFF (Not used)
27	PROTECTOR IN	I		Speaker protect signal input
28	MD-RESET	O		MD reset signal output
29	IIC-CLK	I/O		I2C bus CLK input/output
30	IIC-DATA	I/O		I2C bus DATA input/output
31	TXQ	—	Not used
32	SQ-DATA	I		Subcode Q data input
33	SQ-CLK	O		Subcode Q data output
34	FL-RESET	O		FL reset signal
35	FL-DATA	O		FL data output
36	FL-CHIP SELECT	O		FL chip select signal
37	FL-CLK	O		FL clock output
38	62-LAT	O		M62428AFP (IC301) latch signal output
39	ST-BY LED	O		Sub clock signal output (Test mode)
40, 41	V-CINE	O		Not used
42	FL-ON	O		FL switch ON
43	POWER-ON	O Stand by relay ON
44	B-FREQ	O		FREQ high/low signal for SYNC bass (Not used)
45	FUNC-SEL1	O		Function select signal output “L” : TAPE, “H” : LINE IN
46	OPT-SEL	O		Digital input select signal output
47	62-DATA	O		M62428AFP (IC301) data output
48	62-CLK	O		M62428AFP (IC301) clock output
49	ST-MUTE	O		ST mute signal output

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