Sony Ericsson service manual Circuit Boards Location, CDX-M620/M670

CDX-M620/M670

Pin No.	Pin Name	I/O	Pin Description	4-2. CIRCUIT BOARDS LOCATION
83	STBY	I	Hardware standby signal
84	VCC	—	Power supply pin (+5 V)
85	XTAL	—	Crystal oscillator (18.432 MHz)
86	EXTAL	— Crystal oscillator (18.432 MHz)
87	VSS	—	Ground	DISC IN SW board	LIMIT SW board
88	PF7	O	Not used. (Open)
89	VCC	—	Power supply pin (+5 V)	SWITCH board	SERVO board
90 – 96	PF6 – PF0	O	Not used. (Open)
97	UNI SO	O	SONY BUS serial data output
98	UNI SI	I	SONY BUS serial data input
99, 100	VSS	—	Ground
101	UNI CKI	I	SONY BUS serial clock input
102	P53	O	Not used. (Open)
103	AVCC	—	Power supply pin (+5 V)
104	VREF	—	Power supply pin (+5 V)
105 – 112	P40 – P47	I	Connecting to ground in this set.		tuner unit
113	AVSS	—	Ground
					(TUX201)
114	VSS	—	Ground	DISPLAY board
115 – 122	P17 – P10	O	Not used. (Open)
					MAIN board
123	MD0	I	Mode setting 0
124	MD1	I	Mode setting 1		SUB (CD) board
125	MD2	I	Mode setting 2
126 – 128	PG0 – PG2	O	Not used. (Open)		KEY board

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