Sony MZ-R50 service manual Section Diagrams, Pin No, Pin name, Description

SECTION 6

DIAGRAMS

6-1. EXPLANATION OF IC TERMINALS IC503 DIGITAL SERVO, ATRAC (CXD2652AR)

Pin No.	Pin name	I/O	Description
1	MNT 0	O	Traverse count signal output.
2	MNT 1	O	Track jump detect output.
3	MNT 2	–	Not used (Open).
4	MNT 3	–	Not used (Open).
5	SWDT	I	Inputs write data signal from system controller (IC801).
6	SCLK	I	Inputs serial clock signal from system controller (IC801).
7	XLAT	I	Inputs serial latch signal from system controller (IC801).
8	SRDT	O	Outputs write data signal to system controller (IC801).
9	SENS	O	Outputs internal status (SENSE) to system controller (IC801).
10	XRST	I	Inputs reset signal from system controller (IC801). Reset : L
11	SQSY	O	Output subcode Q sync (SCOR) to system controller (IC801).
			Outputs “L” every 13.3msec. Outputs “H” at all most mostly.
12	DQSY	O	Outputs digital-in U-bit CD format subcode Q sync (SCOR) to system controller (IC801).
			Outputs “L” every 13.3msec. Outputs “H” at all most mostly.
13	WRPWR	I	Inputs laser power switching signal from system controller (IC801).
14	NC	–	Not used (Open).
15	TX	I	Input of write data taransmission timing from system controller (IC801).
			Also used as magnetic field head ON/OFF output.
16	OSC1	O	Clock output (22.5MHz).
17	OSC0	I	Clock input (22.5MHz).
18	XTSL	–	Not used (Fixed at “L”)
19	NC	–	Not used (Ground).
20	RVSS	–	Connect to ground.
21	DIN	I	Digital audio signal input pin (For optical input).
22	NC	–	Not used (Open).
23	ADDT	I	Audio data input from A/D converter (IC303).
24	DATA	O	Monitor/decode audio data output to A/D converter (IC303).
25	ALRCK	O	L/R clock output to D/A converter (IC303).
26	ABCK	O	Bit clock signal output to A/D, D/A converter (IC303).
27	FS256	O	11.2896MHz clock output (MCLK).
28	DVDD	–	Power supply (+2.8V) for digital.
29 – 39	A00 – A08, A10, A11	O	Address signal output to RAM (IC509).
40	DVSS	–	Ground terminal.
41	XOE	O	Output enable contol signal output to RAM (IC509).
42	XCAS	O	Column address strobe singal output to RAM (IC509).
43	A09	O	Address signal output to RAM (IC509).
44	XRAS	O	Row address strobe signal output to RAM (IC509).
45	XWE	O	Read/write control signal output to RAM (IC509).
46 – 49	D0 – D3	I	Data signal input from RAM (IC509).
50	MVCI	–	Not used (Connect to ground).
51	ASYO	O	Playback EFM full-swing output (L : VSS, H : VDD).
52	ASYI	I	Playback EFM asymmetry comparate voltage input.
53	AVDD	–	Power supply (+2.8V) for analog.
54	BIAS	I	Playback EFM asymmetry circuit constant current input.
55	RFI	I	Inputs playback EFM RF signal from RF amplifier (IC501).

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