Sony MDS-JB920 service manual 38

•MAIN BOARD IC800 M30610MCA-264FP (SYSTEM CONTROLLER)

Pin No.		Pin Name	I/O			Function
1		JOG1	I	JOG dial pulse input from the rotary encoder (S713 - AMS ±)
2		JOG0	I	JOG dial pulse input from the rotary encoder (S713 - AMS ±)
3		C1	O	Monitor output terminal for the test		C1 error rate is output when test mode
4		ADER	O	Monitor output terminal for the test		ADER is output when test mode
5		SQSY	I	Subcode Q sync (SCOR) input from the CXD2654R (IC121)
				“L” is input every 13.3 msec	Almost all, “H” is input
6		RMC	I	Remote control signal input from the remote control receiver (IC761)
7		AIN1	I	Sircs remote control signal input of the S-LINK CONTROL A1
8		BYTE	I	External data bus line byte selection signal input “L”: 16 bit, “H”: 8 bit (fixed at “L”)
9		CNVSS	—	Ground terminal
10		XT-IN	I	Sub system clock input terminal (32.768 kHz)
11		XT-OUT	O	Sub system clock output terminal (32.768 kHz)
12		S.RST	I	System reset signal input from the LA5632 (IC700) “L”: reset
				For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
13		XOUT	O	Main system clock output terminal (7 MHz)
14		GND	—	Ground terminal
15		XIN	I	Main system clock input terminal (7 MHz)
16		+3.3V	—	Power supply terminal (+3.3V)
17		NMI	I	Non-maskable interrupt input terminal (fixed at “H” in this set)
18		DQSY	I	Digital In U-bit CD format subcode Q sync (SCOR) input from the CXD2654R (IC121)
				“L” is input every 13.3 msec	Almost all, “H” is input
19		P.DOWN	I	Power down detection signal input terminal “L”: power down, normally: “H”
20		XINT	I	Interrupt status input from the CXD2654R (IC121)
21		DVOL1	I	Digital rec level volume input terminal
22		DVOL0	I	Digital rec level volume input terminal
23 to 30		NC	I	Not used (fixed at “L”)
31		SWDT	O	Writing data output to the CXD2654R (IC121) and D/A converter (IC200)
32		SRDT	I	Reading data input from the CXD2654R (IC121)
33		SCLK	O	Serial clock signal output to the CXD2654R (IC121) and D/A converter (IC200)
34		FLCS	O	Chip select signal output to the FL/LED driver (IC771)
35		FLDATA	O	Serial data output to the FL/LED driver (IC771)
36		NC	I	Not used (fixed at “L”)
37		FLCLK	O	Serial data transfer clock signal output to the FL/LED driver (IC771)
38 to 47		NC	I	Not used (fixed at “L”)
48		CSET0	I	Destination setting terminal (US, Canadian models: fixed at “L”, AEP, UK models: fixed at “H”)
49		CSET1	I	Destination setting terminal (US, Canadian models: fixed at “H”, AEP, UK models: fixed at “L”)
50		XINSW	I	Setting terminal of the loading control system select (fixed at “H” in this set)
51		NC	I	Not used (fixed at “L”)
52	MNT2 (XBUSY)		I	Busy signal input from the CXD2654R (IC121)
53		DIG-RST	O	Reset signal output to the CXD2654R (IC121) and BH6511FS (IC152) “L”: reset
54	MNT1 (SHOCK)		I	Track jump detection signal input from the CXD2654R (IC121)
55		SENS	I	Internal status (SENSE) input from the CXD2654R (IC121)
56		LDON	O	Laser diode on/off control signal output to the automatic power control circuit “H”: laser on
57		REFLECT	I	Detection input from the disc reflection rate detect switch (S102)
				“L”: high reflection rate disc, “H”: low reflection rate disc
58		PROTECT	I	Rec-proof claw detect input from the protect detect switch (S102) “H”: write protect

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