Sony service manual MZ-R500/R500PC, Power supply terminal for the analog +2.4

MZ-R500/R500PC

Pin No.	Pin Name	I/O	Description
52	AVD2	—	Power supply terminal (for the analog) (+2.4 V)
53	AVS2	—	Ground terminal (for the analog)
54	ADRB	I	A/D converter the lower limit voltage input (fixed at “L” in this set)
55	SE	I	Sled error signal input terminal Not used (fixed at “L”)
56	TE	I	Tracking error signal input from RF amp (IC501)
57	DCHG	—	Connecting analog power supply of the low impedance (fixed at “H” in this set)
58	APC	I	Error signal input for the laser automatic power control Not used (fixed at “H”)
59	DSPVDD0	—	Power supply terminal (for DSP block) (+1.5 V)
60	DSPVSS0	—	Ground terminal (for DSP block)
61	XTSL	I	Input terminal for the frequency set up of the system clock
			“L”: 45.1584 MHz, “H”: 22.5792 MHz (fixed at “L” in this set)
62	DIN1	I	Input terminal of the record system digital audio signal
63	(DOUT)	O	Output terminal of the playback system digital audio signal		Not used (open)
64	(DAPWMLP)	O	D/A converter PWM output (L-CH right phase)	Not used (open)
65	(DAPWMLN)	O	D/A converter PWM output (L-CH reverse phase)	Not used (open)
66	(DAPWMRP)	O	D/A converter PWM output (R-CH right phase)	Not used (open)
67	DADT	O	Audio data output Not used (open)
68	ADDT	I	Data signal input from the external A/D converter (IC301)
69	LRCK	O	L/R sampling block signal (44.1 kHz) output to the external A/D converter (IC301)
70	XBCK	O	Bit clock signal (2.8224 MHz) output to the external A/D converter (IC301)
71	FS256	O	11.2896 MHz clock signal output to the external A/D converter (IC301)
72	(MVCI)	I	Vibrate input for the digital in PLL from the external VCO		Not used (fixed at “L”)
73	DSPVDD1	—	Power supply terminal (for DSP block) (+1.5 V)
74	ADFG	I	ADIP duplex FM signal (20.05 ± 1 kHz) input from RF amp (IC501)
75	(F0CNT)	O	Filter cut off control signal output Not used (open)
76	DIFVDD0	—	Power supply terminal (for DSP I/F) (+2.3 V)
77	DIFVSS0	—	Ground terminal (for DSP I/F)
78	APCREF	O	Control signal output to the reference voltage generation circuit for the laser
			automatic power control
79	(LDDR)	O	PWM signal output for the laser automatic power control		Not used (open)
80	TRDR	O	Tracking servo drive PWM signal output (–) to the motor driver (IC701)
81	TFDR	O	Tracking servo drive PWM signal output (+) to the motor driver (IC701)
82	FFDR	O	Focus servo drive PWM signal output (+) to the motor driver (IC701)
83	FRDR	O	Focus servo drive PWM signal output (–) to the motor driver (IC701)
84	MCUVDD1	—	Power supply terminal (for the microcomputer block) (+1.5 V)
85	(FGIN)	I	FG signal input terminal for the spindle servo Not used (open)
86	FS4	O	176.4 MHz clock signal output to the power control (IC601, IC901)
87	SPRD/SPDU/RTG0	O	Spindle servo drive PWM signal output terminal (–) to the motor driver (IC701)
88	SPFD/SPVS/PWM3	O	Spindle servo drive PWM signal output (+)
89	SPDV/RTG1	O	Spindle motor drive control signal output (V)/RTG output 1 to the motor
			driver (IC701)
90	SPDW/RTG2	O	Spindle motor drive control signal output (W)/RTG output 2 to the motor
			driver (IC701)
91	DSPVDD2	—	Power supply terminal (for DSP block) (+1.5 V)
92	DSPVSS1	—	Ground terminal (for DSP block)
93	SPCU	I	Spindle motor drive comparison signal input (U) from the motor driver (IC701)
94	SPCV	I	Spindle motor drive comparison signal input (V) from the motor driver (IC701)
95	SPCW	I	Spindle motor drive comparison signal input (W) from the motor driver (IC701)
96	SRDR	O	Sled servo drive PWM signal output (–) to the motor driver (IC701)
97	SFDR	O	Sled servo drive PWM signal output (+) to the motor driver (IC701)
98	SLDV	O	Sled motor drive signal output (V) to the motor driver (IC701)/drive control signal
			output (1–)

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