Sony MDX-C6500RV service manual 1 to

•SERVO BOARD IC501 CXP84340-217Q (MD MECHANISM CONTROLLER)

Pin No.		Pin Name	I/O	Description
1 to 5	TIN3 to TIN7		I/O	Input of the 4⋅ 8 matrix test keys (“L” is always output, except in test mode)					Not used (open)
6		LOAD	O	Loading motor control signal output to the motor driver (IC305)			“H” active		*1
7		EJECT	O	Loading motor control signal output to the motor driver (IC305)			“H” active		*1
8, 9		NCO	O	Not used (open)
10		MDMON	O	Power supply on/off control signal output of the MD mechanism deck section main power supply
				and loading motor drive (IC305) power supply	“H”: power on
11		E-SW	I	Inputs the disc loading completion detect switch detection signal
				“L”: When completed of the disc loading operation
12		AG-OK	O	Output of aging status in test mode “L”: under aging, “H”: aging completed					Not used (open)
13		ADJ-OK	O	Output of status when aging completed in test mode		“L”: aging NG, “H”: aging OK
				Not used (open)
14 to 17		NCO	O	Not used (open)
18		DFCTSEL	I	Select whether defect function is used for the CXD2652AR (IC301)
				“L”: used this function , “H”: not used this function (fixed at “H” in this set)
19		DPLLSEL	I	Select whether digital PLL function is used for the CXD2652AR (IC301)
				“L”: used this function , “H”: not used this function (fixed at “H” in this set)
20		EMPHSEL	I	Select whether emphasis signal output from pin or unilink data
				“L”: outputs from both pin and unilink data, “H”: output from pin only (fixed at “H” in this set)
21		LOCK	O	Mini-disc lock detection signal output to the master controller (IC501)				“H”: lock
22		NCO	O	Not used (open)
23		2M/4M	I	Select whether D-RAM capacitance 2M bit or 4M bit		“L”: 4M bit (external D-RAM) , “H”: 2M
				bit (internal D-RAM of CXD2652AR) (fixed at “L” in this set)
24, 25		NCO	O	Not used (open)
26		MNT0	I	Focus OK signal input from the CXD2652AR (IC301)
				“H” is input when focus is on (“L”: NG)
27		MNT1	I	Track jump detection signal input from the CXD2652AR (IC301)
28		MNT2	I	Busy monitor signal input from the CXD2652AR (IC301)
29		MNT3	I	Spindle servo lock status monitor signal input from the CXD2652AR (IC301)
				System reset signal input from the master controller (IC501), reset signal generator (IC652) and
30		RESET	I	reset switch (SW503) “L”: reset
				For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”
31		EXTAL	O	Main system clock output terminal (10 MHz)
32		XTAL	I	Main system clock input terminal (10 MHz)
33		VSS	—	Ground terminal
34		TX	O	Sub system clock output terminal (32.768 kHz)	Not used (open)
35		TEX	I	Sub system clock input terminal (32.768 kHz)	Not used (fixed at “L”)
36		AVSS	—	Ground terminal (for A/D converter)
37		AVREF	I	Reference voltage input terminal (+5V) (for A/D converter)
38		INIT	I	Initial reset signal input terminal (A/D input) (fixed at “H”)
39		TEMP	I	Temperature sensor (TH501) input terminal (A/D input)
40		ACNT	I	Select the number of load/eject aging times (A/D input)
				0H – 54H (30 times), 55H – OA9H (20 times), OAAH – OFFH (10 times)
41		DO-SEL	I	Select the digital output bits (A/D input)
42		EE-CS	O	Chip select signal output to the external EEPROM device Not used (open)
43		EE-CKO	O	Serial data transfer clock signal output to the external EEPROM device				Not used (open)
44		EE-SIO	I/O	Two way data bus with the external EEPROM device		Not used (open)
45		MD-SO	O	Writing serial data signal output to the CXD2652AR (IC301) and CXA2523AR (IC302)
46		LINKOFF	O	Unilink on/off control signal output for the SONY bus		“L”: link on, “H”: link off

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